IMSS E3265-20
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E3265-20
REV A 1/28/2025
FEDERAL INDUSTRIES
IMSS60, IMSS84, IMSS120, EIMSS60 & EIMSS84 MODELS
INSTALLATION & OPERATIONS MANUAL
KEEP THIS MANUAL FOR FUTURE REFERENCE
Engineering and technical data are subject to change without notice.
FEDERAL INDUSTRIES 215 Federal Ave. Belleville, WI 53508
Toll Free 1(800) 356-4206 WI Phone (608) 424-3331 Fax: (608) 424-3234
IMSS E3265-20
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CONTENTS
INTRODUCTION ....................................................................................................................................... 3
WARNING LABELS & SAFETY INSTRUCTIONS ............................................................................. 4
REFRIGERATION WARNING (INSTALL-REPAIR-DECOMMISSIONING) ............................... 5-10
PRE-INSTALLATION PROCEDURES ................................................................................................ 11
INSPECTION FOR SHIPPING DAMAGE ............................................................................. 11
INSTALLATION INSTRUCTIONS.................................................................................................. 11-22
LOCATING THE DISPLAY CASE ........................................................................................ 11
ELECTRICAL CONNECTION ............................................................................................... 12
PERMANENT CONNECTED ................................................................................................ 12
STANDARD BASE ELECTRICAL CONNECTION ........................................................... 12
TOP ELECTRICAL CONNECTION ..................................................................................... 12
CORD CONNECTED .............................................................................................................. 13
REMOVING CASE FROM SHIPPING SKID ........................................................................ 13
REMOVING PACKAGING MATERIAL ............................................................................... 14
LEVELING THE CASE ........................................................................................................... 14
SEALING THE UNIT TO THE FLOOR ................................................................................. 14
BASE PANELS REMOVAL IMSS60 & IMSS84 ................................................................... 15
BASE PANELS REMOVAL IMSS120 ................................................................................... 16
BASE COMPONENT LAYOUT ........................................................................................ 17-18
CONDENSATE EVAPORATOR ............................................................................................ 19
CONDENSATE PAN SHIPPED LOOSE ................................................................................ 19
CONDENSATE PUMP ........................................................................................................... 20
SHELVES ............................................................................................................................ 21-22
OPERATING INSTRUCTIONS ........................................................................................................ 23-26
USER CONTROLS ............................................................................................................. 23-25
INITIAL START UP ............................................................................................................... 26
PLACING PRODUCT IN CASE ............................................................................................. 26
CLEANING INSTRUCTIONS ........................................................................................................... 26-29
ACRYLIC AIR DEFLECTOR ................................................................................................. 26
DAILY CLEANING ................................................................................................................ 27
WEEKLY CLEANING ....................................................................................................... 27-28
MAINTENANCE ..................................................................................................................................... 29
CLEANING CONDENSER COIL .......................................................................................... 29
SERVICE INFORMATION ............................................................................................................... 30-32
PRE-SERVICE CHECKLIST .................................................................................................. 31
SPECIAL SERVICE SITUATIONS ........................................................................................ 32
SALE & DECOMMISSIONING ............................................................................................................ 33
ELECTRICAL DATA .............................................................................................................................. 34
CONTROL OPERATION .................................................................................................................. 35-38
ELECTRONIC CONTROL ..................................................................................................... 35
OPERATION ........................................................................................................................... 35
DEFROST CYCLE .................................................................................................................. 35
CONTROL PARAMETERS ............................................................................................... 36-38
REFRIGERATION OPERATION .................................................................................................... 39-41
SELF CONTAINED OPERATION ........................................................................................ 39
REMOTE OPERATION ...................................................................................................... 39-40
ELECTRONIC EXPANSION VALVE (EEV)……………………………………………….41
REPLACEMENT PARTS - ..................................................................................................................... 42
WIRING DRAWING .......................................................................................................................... 43-48
IMSS E3265-20
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INTRODUCTION
Thank you for purchasing a Federal Industries Merchandiser. This manual contains
important instructions for installing and servicing the RSSM, Refrigerated Self-Service
Merchandisers. A repair parts list is also included in the manual. Read all of these
documents carefully before installing or servicing your case.
NOTICE
Read this manual before installing your case. Keep this manual and refer to it before
doing any service on the equipment. Failure to do so could result in personal injury or
damage to the case.
NOTICE
Installation and service of the electrical components in the case must be performed by a
licensed electrician.
The portions of this manual covering components contain technical instructions intended only
for persons qualified to perform electrical work.
DANGER
Improper or faulty hookup of electrical components in the case can result in severe
injury or death.
All electrical wiring hookups must be done in accordance with all applicable local,
regional, or national standards.
NOTE: UNIT MUST BE GROUNDED
REGISTRATION & SERIAL NUMBER
It’s important to keep a record of the model and serial number of your merchandiser for
warranty and part identification. Please write them here for your quick reference.
Register your product online! Visit our website at www.federalindustries.com and
register your product today.
Case Model__________________________ Serial
Number______________________
We’re here to provide you with the best possible experience with your new product,
however, we cannot cover everything about your merchandiser in this manual, so if you
have any additional questions or issues, please see the SERVICE INFORMATION
PAGE to find who you should
contact.
IMSS E3265-20
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WARNING LABELS & SAFETY
INSTRUCTIONS
This is the safety-alert symbol. When you see this symbol on your case or
in the manual, be alert to the potential for personal injury or damage to
your equipment.
Be sure you understand all safety messages and always follow recommended precautions and safe
operating procedures.
NOTICE TO EMPLOYERS
You must make sure that everyone who installs, uses, or services your case is thoroughly familiar
with all safety information and procedures.
Important safety information is presented in this section and throughout the
manual. The following signal words are used in the warning and safety messages:
DANGER: Severe injury or death will occur if you ignore the message.
WARNING: Severe injury or death can occur if you ignore the message.
CAUTION: Minor injury or damage to your case can occur if you ignore the message.
NOTICE: This is important installation, operation, or service information. If you ignore the message,
you may damage your case.
The warning and safety labels shown throughout this manual are placed on your Federal
Industries case at the factory. Follow all warning label instructions. If any warning or
safety labels become lost or damaged, call our customer service department at 1(800)
356-4206 for replacements.
This label is located behind the removable base This label is located under display deck
panels display and under deck pans.
This label is located by condensing unit
IMSS E3265-20
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REFRIGERATION WARNING
INSTALLATION-REPAIR-DECOMMISSIONING
This is the Danger-Flammable symbol. When you see this symbol on your case or in the
manual, be alert to the potential for risk of fire or explosion.
Be sure you understand all safety messages and always follow recommended precautions and
safe operating procedures.
DANGER
Risk of fire or explosion. Flammable refrigerant used. To be repaired only by trained
service personnel. Do not puncture refrigerant tubing. Dispose of properly in accordance
with federal or local regulations
Consult repair manual/owner’s guide before attempting to service this product. All safety
precautions must be followed.
Follow handling instructions carefully in compliance with national regulations.
Auxiliary devices which may be ignition sources shall not be installed in the ductwork,
other than auxiliary devices listed for use with the specific appliance.
Do not store explosive substances (such as aerosol cans with a flammable propellant) in
this case.
Do not use an electrical appliance INSIDE the food storage compartments unless its type
is recommended by manufacturer.
Flammable refrigerant type specified on case nameplate is on the serial label.
APPLIES TO R290 REFRIGERANT MODELS ONLY! Contains a charge of R290 refrigerant
with a lower flammability limit (LFL) of .038kg/m³. See table for amount of charge.
IMSS E3265-20
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3. Qualification: All refrigeration and electrical maintenance, service, and repair must
be performed by a Certified Technician that is trained in the required flammable
refrigerants safety procedures. Technicians must read the entire section
“REFRIGERATION WARNINGS SECTION” of this manual.
Including but not limited to the following:
a) breaking into the refrigerating circuit.
b) opening of sealed components.
c) opening of ventilated enclosures.
4.Checks to Area: Prior to beginning work on systems containing FLAMMABLE
REFRIGERANTS, safety checks are necessary to ensure that the risk of ignition is
minimized prior to conducting work on the system.
-Capacitors are discharged: this shall be done in a safe manner to avoid possibility of
sparkling.
- No live electrical components and wiring are exposed while charging, recovering or
purging the system.
- Continuity of earth bonding.
IMSS E3265-20
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-Work shall be undertaken under a controlled procedure to minimize the risk of a
flammable gas or vapor being present while the work is being performed.
-All maintenance staff and others working in the local area shall be instructed on the
nature of the work being carried out. Work in confined spaces shall be avoided.
-The area shall be checked with an appropriate refrigerant detector prior to and during
work, to ensure the technician is aware of potentially toxic or flammable atmospheres.
Ensure that the leak detection equipment being used is suitable for use with all
applicable refrigerants, i.e., non-sparking, adequately sealed, or intrinsically safe.
-If any hot work is to be conducted on the refrigerating equipment or any associated
parts, appropriate fire extinguishing equipment shall be available on hand. A dry
chemical or CO2 fire extinguisher should be adjacent to the charging area.
-No person carrying out work in relation to a REFRIGERATING SYSTEM which
involves exposing any pipe work shall use any sources of ignition in such a manner that
it may lead to the risk of fire or explosion. All possible ignition sources, including
cigarette smoking, should be kept sufficiently far away from the site of installation,
repairing, removing and disposal, during which refrigerant can possibly be released to
the surrounding space. Prior to work taking place, the area around the equipment shall
be surveyed to make sure that there are no flammable hazards or ignition risks. “No
Smoking” signs shall be displayed.
-Ensure that the area is in the open or that it is adequately ventilated before breaking
into the system or conducting any hot work. A degree of ventilation shall continue during
the period that the work is carried out. The ventilation should safely disperse any
released refrigerant and preferably expel it externally into the atmosphere.
-Where electrical components are being changed, they shall be fit for the purpose and
to the correct specification so as to minimize the risk of possible ignition due to incorrect
parts. At all times, the manufacturer’s maintenance and service guidelines shall be
followed. If in doubt, consult the manufacturer’s technical department for assistance.
The following checks shall be applied to installations using flammable refrigerants:
a) the actual REFRIGERANT CHARGE is in accordance with the room size within
which the refrigerant containing parts are installed.
b) The ventilation machinery and outlets are operating adequately and are not
obstructed.
c) Markings of the equipment continue to be visible and legible. Markings and signs
that are illegible shall be corrected.
d) Refrigerating pipe or components are installed in a position where they are
unlikely to be exposed to any substance which may corrode refrigerant containing
-Repair and maintenance to electrical components shall include initial safety checks and
component inspection procedures. If a fault exists that could compromise safety, then
no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If
the fault cannot be corrected immediately but it is necessary to continue operation, an
An adequate temporary solution shall be used. This shall be reported to the owner of
the Initial safety checks shall include:
IMSS E3265-20
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5. Repairs to sealed components
-During repairs to sealed components, all electrical supplies shall be
disconnected from the equipment being worked upon prior to any removal of sealed
covers, etc. If it is necessary to have an electrical supply to equipment during
servicing, then a permanently operating form of leak detection shall be located at the
most critical point to warn of a potentially hazardous situation.
-Particular attention shall be paid to the following to ensure that by working on
electrical components, the casing is not altered in such a way that the level of protection
is affected. This shall include damage to cables, excessive number of connections,
terminals not made to original specification, damage to seals, incorrect fitting of glands,
etc. Ensure that the apparatus is mounted securely.
Ensure that seals or sealing materials have not degraded to the point that they no
longer serve the purpose of preventing the ingress of flammable atmospheres.
Replacement parts shall be in accordance with the manufacturer’s specifications.
-Do not apply any permanent inductive or capacitance loads to the circuit without
ensuring that this will not exceed the permissible voltage and current permitted for the
equipment in use.
NOTE The use of silicon sealant can inhibit the effectiveness of some types of leak
detection equipment. Intrinsically safe components do not have to be isolated prior to
working on them.
8. Detection of flammable refrigerants: Under no circumstances shall potential
ignition sources be used in the searching for or detection of refrigerant leaks. A halide
torch (or any other detector using a naked flame) shall not be used.
The following leak detection methods are deemed acceptable for all refrigerant
systems:
-Electronic leak detectors may be used to detect refrigerant leaks but, in the case of
FLAMMABLE REFRIGERANTS, the sensitivity might not be adequate or might need
recalibration. (Detection equipment shall be calibrated in a refrigerant-free area.)
Ensure that the detector is not a potential source of ignition and is suitable for the
refrigerant used. Leak detection equipment shall be set at a percentage of the LFL of
the refrigerant and shall be calibrated to the refrigerant employed, and the appropriate
percentage of gas (25 % maximum) is confirmed.
-Leak detection fluids are also suitable for use with most refrigerants but the use of
detergents containing chlorine shall be avoided as the chlorine can react with the
refrigerant and corrode the copper pipework.
NOTE Examples of leak detection fluids are
– bubble method,
– fluorescent method agents.
If a leak is suspected, all naked flames shall be removed/extinguished.
If a leakage of refrigerant is found which requires brazing, all the refrigerants shall be
recovered from the system, or isolated (by means of shut off valves) in a part of the
system
remote from the leak.
IMSS E3265-20
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9. Removal and Evacuation: When breaking into the refrigerant circuit to make
repairs-or for any other purpose-conventional procedures shall be used. However, for
flammable refrigerants it is important that the best practice be followed, since
flammability is a consideration. The following procedure shall be adhered to:
a. Safely remove refrigerant following local and national regulations.
b. Purge the circuit with inert gas.
c. Evacuate (optional for A2L).
d. Purge with inert gas (optional for A2L).
e. Open the circuit by cutting or brazing.
The refrigerant change shall be recovered into the correct recovery cylinders if venting
is not allowed by local and national codes. For appliances containing flammable
refrigerants, the system shall be purged with oxygen-free nitrogen to render the
appliance safe for flammable refrigerants. This process might need to be repeated
several times. Compressed air or oxygen shall not be used for purging refrigerant
systems. For appliances containing flammable refrigerants, refrigerant purging shall be
achieved by breaking the vacuum in the system with oxygen-free nitrogen and
continuing to fill until the working pressure is achieved, then venting to atmosphere, and
finally pulling down to a vacuum (optional for A2L). This process shall be repeated until
no refrigerant is within the system (optional for A2L). When the final oxygen-free
nitrogen change is used, the system shall be vented down to atmospheric pressure to
enable work to take place. Ensure that the outlet for the vacuum pump is not close to
any potential ignition sources and that ventilation is available.
10. Charging procedures: In addition to conventional charging procedures, the
following requirements shall be followed.
a. Ensure that contamination of different refrigerants does not occur when using
charging equipment. Hoses or lines shall be as short as possible to minimize the
amount of refrigerant contained in them.
b. Cylinders shall be kept in an appropriate position according to the instructions.
c. Ensure that the REFRIGERATING SYSTEM is earthed prior to charging the system
with refrigerant.
d. Label the system when charging is complete (if not already).
e. Extreme care shall be taken not to overfill the REFRIGERATING SYSTEM.
11. Decommissioning: Before carrying out this procedure, it is essential that the
technician is completely familiar with the equipment and all its details. It is
recommended good practice that all refrigerants are recovered safely. Prior to the task
being carried out, an oil and refrigerant sample shall be taken in case analysis is
required prior to re-use of recovered refrigerant. It is essential that electrical power is
available before the task commences.
a. Become familiar with the equipment and its operation.
b. Isolate the system electrically.
c. Before attempting the procedure, ensure that:
i. Mechanical handling equipment is available, if required, for handling refrigerant
cylinders.
ii. All personal protective equipment is available and being used correctly.
iii. The recovery process is supervised at all times by a competent person.
iv. Recovery equipment and cylinders conform to the appropriate standards.
d. Pump down refrigerant system, if possible.
IMSS E3265-20
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e. If a vacuum is not possible, make a manifold so that refrigerant can be removed from
various parts of the system.
f. Make sure that the cylinder is situated on the scales before recovery takes place.
g. Start the recovery machine and operate in accordance with instructions.
h. Do not overfill cylinders (no more than 80% volume liquid charge).
i. Do not exceed the maximum working pressure of the cylinder, even temporarily.
j. When the cylinders have been filled correctly and the process completed, make sure
that the cylinders and the equipment are removed from the site properly and all isolation
valves on the equipment are closed off.
k. Recovered refrigerant shall not be charged into another refrigerating system unless it
has been cleaned and checked.
12. Labeling: Equipment shall be labeled stating that it has been de-commissioned and
emptied of refrigerant. The label shall be dated and signed. For appliances containing
flammable refrigerants, ensure that there are labels on the equipment stating the
equipment contains flammable refrigerant.
13.Recovery: When removing the refrigerant from a system, either for servicing or
decommissioning, it is recommended good practice that all refrigerants are removed
safely.
When transferring refrigerant into cylinders, ensure that only appropriate refrigerant
recovery cylinders are employed. Ensure that the correct number of cylinders for
holding the total system charge is available. All cylinders to be used are designated for
the recovered refrigerant and labeled for that refrigerant (i.e., special cylinders for the
recovery of refrigerant). Cylinders shall be complete with pressure-relief valve and
associated shut-off valve in good working order. Empty recovery cylinders are
evacuated and, if possible, cooled before recovery occurs.
The recovery equipment shall be in good working order with a set of instructions
concerning the equipment that is at hand and shall be suitable for the recovery of all
appropriate refrigerants including, when applicable, FLAMMABLE REFRIGERANTS. In
addition, a set of calibrated weighing scales shall be available and in good working
order. Hoses shall be complete with leak-free disconnect coupling and in good
condition. Before using the recovery machine, check that it is in satisfactory working
order, has been properly maintained and that any associated electrical components are
sealed to prevent ignition in the event of refrigerant release. Consult manufacturer if in
doubt.
The recovered refrigerant shall be returned to the refrigerant supplier in the correct
recovery cylinder, and the relevant waste transfer note arranged. Do not mix
refrigerants in recovery units and especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that they have been
evacuated to an acceptable level to make certain that FLAMMABLE REFRIGERANT
does not remain within the lubricant. The evacuation process shall be carried out prior
to returning the compressor to the suppliers. Only electric heating to the compressor
body shall be employed to accelerate this process. When oil is drained from a system, it
shall be carried out safely.
IMSS E3265-20
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PRE-INSTALLATION PROCEDURES
Inspection For Shipping Damage
You are responsible for filing all freight claims with the delivery truck line. Inspect
all cartons and crates for damage as soon as they arrive. If damage is noted to
shipping crates, cartons, or if a shortage is found, note this on the bill of lading
(all copies) prior to signing.
If damage is discovered when the case is uncrated, immediately call the delivery
truck line and follow-up the call with a written report indicating concealed damage
to your shipment. Ask for an immediate inspection of your concealed damaged
item. Crating material must be retained to show the inspector from the truck line.
INSTALLATION INSTRUCTIONS
IMPORTANT: Read this Section of this manual located on page 5.
“REFRIGERATION WARNING &INSTALLATION-REPAIR-DECOMMISSIONING”
All refrigeration and electrical work must be performed by certified technicians.
The installation of the appliance and the refrigerant must only be performed by Federals
approved Service or suitably qualified person.
Appliance to be installed in accordance with safety standards ANSI/ASHREA 15.
The appliance shall not be installed in public corridors or lobbies.
This case is designed for a class 2 environment.
Test room
climate
class
Dry bulb
temperature
[°F]
Relative
Humidity
[%] Dew point [°F]
Water vapour
mass in dry air
[lbm
water/lbm air]
Required
Test Lab
Temperature
[°F]
2.0 71.6 65 59.36 0.0108 89.6
NSF TYPE 1 Temperature cannot exceed 75 deg F and 55% humidity.
Locating The Display Case
The case should be located where it is not subjected to the direct rays of the sun,
heating ducts, grills, radiator, or ceiling fans, nor should it be located near open
doors or main door entrances. Also, avoid locations where there is excessive air
movement or air disturbances and avoid high humidity locations such as near
cases with water misting or fogging devices. Failure to locate this case as stated
will reduce the performance of your Island display and will affect temperature of
interior of case and product.
The case requires a minimum of 48” of clearance is needed on all sides of the unit.
Keep clear of obstruction of all ventilation openings in appliance.
IMSS E3265-20
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Electrical Connection
IMPORTANT: Read this Section of this manual located on page 5.
“REFRIGERATION WARNING &INSTALLATION-REPAIR-DECOMMISSIONING”
All refrigeration and electrical work must be performed by certified technicians.
DANGER: Improper or faulty hookup of electrical components in the
display case can result in severe injury or death.
Permanent Connected (Standard)
-Only a licensed electrician must perform all case electrical connections.
-All electrical wiring hookups must be done in accordance with all applicable local,
regional, or national electrical standards.
-A separate circuit for each display case is required to prevent other appliances on the
same circuit from overloading the circuit and causing malfunction.
-The electrical service must be grounded upon installation.
-See the electrical data plate located on the base end, for proper circuit size and wire
ampacity.
(See condensate pan section for special condensate pan wiring)
Standard Base Electrical Connection: There are (2) different styles of electrical
box connections as shown in pictures below. The electrical connection box is in the
base for floor electrical connection. The box is accessible by removing the base panel.
See “Panel Removal Section” of this manual for panel removal instructions. Remove
electrical box cover to access electrical connection.
Optional Top Electrical Connection: The electrical connection box is
accessible on the top of the case for ceiling drop electrical connection. Remove
electrical box cover to access electrical connection.
PERMANENT
CONNECTION
TERMINAL
BLOCK
OR WIRE
PERMANENT
CONNECTION
ELECTRICAL
BOX COVER
PERMANENT
CONNECTION
ELECTRICAL
BOX COVER
PERMANENT
CONNECTION
WIRES
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Cord Connected (OPTION)
-A factory installed optional power cord is properly sized to the amperage requirements
of the case. See the electrical data plate located on the rear exterior of the case for the
proper circuit size for each case.
- The cord is factory installed protruding from the corner of the case.
-A separate circuit for each display case is required to prevent other appliances on the
same circuit from overloading the circuit and causing malfunction.
CAUTION Risk of Electric Shock. If the cord or plug becomes damaged,
replace only with a cord and plug of the same type".
Removing Case from Shipping Skid
Remove the screws and brackets that secure the case to the skid. Remove the
brackets from the case.
Note that the case may have optional wheels installed and once the brackets
holding the case to the skid are removed the case will roll.
CAUTION: Do not push against the clear acrylic deflector around the sides and nose.
Doing so can cause the acrylic to break.
Do not lift or push on the top canopy located on top of the case.
Doing so can permanently damage the tower frame.
Care must be taken not to damage or tip the case when removing it from the
skid or moving the case.
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Removing Packaging Material
Remove bubble wrap and packing material for all shelves and panel, brackets,
etc. If it is necessary to remove tape residue from plastic materials, use cleaning
compounds recommended in the cleaning section of this manual.
Leveling The Case
The case must be level for proper drainage of defrost water to the condensate
pump. A wrench is included to aid in adjusting leg levelers
Check the level of the case where the display overhangs the base.
Adjust the (4) outside leg levelers as needed to level the case in each direction.
The IMSS120 has (2) center leg levelers adjust these so that the center of base
floor is flat.
NOTE: Use a wood or plastic shim under each leg leveler to avoid scratching the
tile floor.
Sealing Unit To The Floor
After the unit is positioned and the leg levelers are turned out, the unit needs to be
sealed to the floor for NSF approved installation.
IMSS E3265-20
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Base Panel Removal IMSS60 and IMSS84 Panels
Panels must be in place when operating the case.
END PANEL
(ONE AT EACH END)
SIDE PANEL
SIDE PANEL
END PANEL SCREWS (4)
SIDE PANEL SLOT
SIDE PANEL HOOK
SIDE PANEL
RETAINER SCREWS
REMOVE THIS PANEL
TO CLEAN CONDENSER
Side Panels
1. Loosen the 2 retainer screws from top of panel.
(The screws will stay on the panel even after they are detached from base)
2. Tilt the top of the panel away from the base and pull up on panel to allow the
side panel tabs to pull out of the side panel slots.
3. Set the panel in a safe place to prevent damage.
4. Reinstall panels in the reverse order.
End Panels
1. Remove the (4) retainer screws from all four corners of end panel.
2. Remove end panel from case and set it in safe place to prevent damage.
3. Reinstall panels in the reverse order.
DANGER: Electric shock hazard. Do not operate unit with panels removed.
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Base Panel Removal IMSS120 Panels
Panels must be in place when operating the case.
LEFT SIDE PANEL
SIDE PANEL SLOT
(3) SIDE PANEL
RETAINER SCREWS
RIGHT SIDE
PANEL
LOUVERS
LOUVERS
(3) TABS
REMOVE THIS PANEL
TO CLEAN CONDENSER
REMOVE THIS PANEL
TO CLEAN CONDENSER
CONTROLS
Side Panels
1. Loosen the 3 retainer screws from top of each side panel.
(The screws will stay on the panel even after they are detached from base)
2. Tilt the top of the panel away from the base and pull up on panel to allow the
side panel tabs to pull out of the side panel slots.
3. Set the panel in a safe place to prevent damage.
4. Reinstall panels in the reverse order.
NOTE: left and right-side panels can only be installed as shown. Louvers
must be near the end of case for the tabs to align with side panel slots. Be
sure all (3) tabs are engaged into side panel slots.
DANGER: Electric shock hazard. Do not operate unit with panels removed.
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Base Component Layouts Self Contained IMSS60 & IMSS84
Base Component Layout Remote IMSS60 & IMSS84
60.41 IMSS60
84.41 IMSS84
CONTROL
PANEL LOCATION
CONDENSATE
PUMP
LIGHT POWER SUPPLY
QUANITY MAY DIFFER
DATA PLATE
LOCATION
7/8 FLOOR ELECTRICAL
CONNECTION LOCATION
REMOTE REFRIGERATION
LINE ACCESS COVER
3/8 HIGH PRESS
CONNECTION
5/8 SUCTION
CONNECTION
4
5.1
22.52
VALVE
CONTROL
4
4
40.41
4
5.1
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Base Component Layout Self Contained IMSS120
Base Component Layout Remote 120
4.8" SQ REMOTE REFRIGERATION
LINE OR DRAIN ACCESS COVER
3/8 HIGH PRESS
CONNECTION
REFRIGERATION SHUT OFF
SOLENOID VALVE
CONTROL
PANEL LOCATION
CONDENSATE PUMP STANDARD
POWER
CONNECTION
BOX
DATA PLATE
LOCATION
7/8 FLOOR ELECTRICAL
CONNECTION LOCATION
5/8 SUCTION
CONNECTION
VALVE
CONTROL
40.4
120
21.2
4.8" SQ REMOTE REFRIGERATION
LINE OR DRAIN ACCESS COVER
21.2
2.7
8.6
7.9
44
3
LED
POWER
SUPPLY
CASTERS
4
4
20.2
6
IMSS E3265-20
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Condensate Evaporator Pan (Standard 3 Shelf Self Contained Models)
IMPORTANT: Read this Section of this manual located on page 5.
“REFRIGERATION WARNING &INSTALLATION-REPAIR-DECOMMISSIONING”
All refrigeration and electrical work must be performed by certified technicians.
NOTICE: This is an open-air merchandiser and can produce a large amount of
condensate water. During normal defrost cycles, steam from the
condensate evaporator may be visible around the case.
Do not use other means to defrost coil other than recommended by manufacturing
The standard Self-Contained case is furnished with an electric condensate evaporator.
Plumbing connections are not required.
Make sure that the drain line has not been dislodged during shipment and that the drain
trap terminates properly over the water reservoir.
The condensate evaporator can be removed from the case and the drain lines can be
plumbed to a drain or a condensate pump to conserve energy. A licensed electrician will
need to disconnect the condensate evaporator wires.
Condensate Evaporator Pan Shipped Loose (OPTION)
If the optional high output condensate pan was ordered it will be shipped loose in a
separate box. This high output pan must be field mounted and wired by a licensed
electrician.
If there is already a factory condensate pan and mounting brackets installed in the base
compartment they must be removed before installing the optional high output pan.
Unwire the heater wires from the 2x 4 electrical box and cap remaining wire ends with
UL approved wire nuts. NOTE: THESE WIRES CAN NOT BE CONNECTED TO THE FIELD
INSTALLED HIGH OUTPUT PAN.
Mount the high output condensate pan inside the base
compartment so that the (2) condensate drain tubes drain
directly into the pan as shown in photo.
The field installed high output condensate pan must be wired
to its own designated circuit breaker and cannot be wired into
the same circuit breaker that the display case uses. The
display case circuit and wiring are not sized to handle the
extra amperage of the high output condensate pan.
See label on condo pan for proper circuit sizing.
- Bottom Electrical (standard): There is a cord and plug provided on the high output
condensate pan. A licensed electrician must provide a designated receptacle to plug in
the high output condensate pan. There are access holes in various locations in the base
enclosure to run wires out of the case to electrical source.
-Top Electrical (optional): There is also a top wiring condensate pan option that provides
a top electrical box on the top side of the canopy. This allows wires to be run to the
store ceiling. There are (2) sets of wires, “main case wiring” and “condensate pan
wiring”. Each circuit is labeled and must run to separate circuits. The condensates pan
wires run down through the case into a 2 x 4 electrical box in the base compartment. A
licensed electrician will need to provide a designated receptacle to plug in the high
output condensate pan.
IMSS E3265-20
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Condensate Pump Standard - Remote & 2 Shelf Self-Contained
Optional - 3 Shelf Self Contained
The pump is mounted in the base compartment and is designed to automatically
remove the condensate water that collects from defrosting the evaporator coil. The
pump has a built-in tank that collects water from the evaporator coil defrost cycle. When
the pump tank is full the pump switches on and pumps water to a remote location for
disposal. When the tank is empty the pump automatically switches off.
The pump is capable of lifting water to a maximum of 20’.
Condensate Discharge Hose.
The case is provided with a 25’ of 3/8ID clear flexible tubing. Depending on options it is
either coiled up on top of the case or in the base compartment.
Hose Coiled in Base
Disconnect Power: Access the hose located in base compartment by removing one
of the base side panels. The hose can be routed to the nearest remote drain through
one of the provided openings or holes. Do not run hose in heavy traffic areas and be
sure hose does not get kinked or pinched.
Hose Coiled on Top
Hose coiled on top of the unit is designed to be run vertical to the ceiling before
being routed to the nearest remote drain. The maximum vertical height the hose can
run is 20’ from floor. Once the hose turns to a horizontal direction the hose must
have a downward slope to avoid low spots that water can collect. Be sure the hose
does not get kinked or pinched.
IMSS E3265-20
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Shelves
The IMSS has solid metal shelves with LED lighting as standard.
There are (4) brackets required for each shelf (2 long brackets and (2) short
brackets. The long brackets are for the long side of case and the short brackets
are at the short end of case. The short bracket with cord retainer clip must be
used at the short end of case where the light cord plugs in.
The shelves are adjustable in ~ 1 1/16” increments.
Allow a minimum of 2” between the top of product and bottom of shelf.
IMPORTANT:
SHORT SHELF
BRACKET WITH
CORD CLIP
CORD CLIP
SHORT SHELF
BRACKET
LONG SHELF BRACKETS
1. Turn the light switch to the off position.
2. Follow the instruction in the illustration below and insert (1) of the (4) shelf brackets
in the desired tower slot on one side of the case. Place the additional shelf brackets
in the same height level on the opposite end of case. The (2) short brackets must go
on the short end and (2) long brackets must go on the long end. The short bracket
with a shelf light cord retainer clip must be on the side with the shelf light receptacle.
IMSS E3265-20
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4
1
2
3
4
INSTALLATION
REMOVAL
2
3
1
TOP HOOK
BOTTOM TAB
SHELF BRACKET
TOWER
1. Place shelf bracket top hook into desired slot in
the tower.
2. Lift shelf bracket top hook to allow shelf bracket
bottom tab to clear slot in tower.
3. Swing shelf bracket bottom tab into tower slot.
4. Place the shelf bracket notch onto bottom of tower
slot.
1. Lift shelf bracket up to allow shelf bracket notch
to clear the bottom of slot in tower.
2. Swing shelf bracket bottom tab out of slot in tower.
3. Drop shelf bracket down to allow shelf bracket top
hook to clear the slot in tower.
4. Remove shelf bracket top from slot in tower.
3. Set the shelf on to the brackets and place the bracket retainer clip into slots on shelf.
4. Push shelf light cords into plastic shelf cord retainer clip located on inside of shelf
bracket.
5. The shelf light cords are attached to the tower and there is no longer a female
connector in the tower. Once the shelf is in the desired location, the shelf light cord
can be plugged into the LED light. The shelf light cord is adjustable, the cord can be
pushed into or pulled out of the tower to get desired length.
6. Place extra cord into cord clip as shown to keep it out of the way.
7. Removal of shelving is performed by following steps in reverse order.
IMSS E3265-20
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OPERATING INSTRUCTIONS
User Controls
Power Switch
The unit has a power switch that turns off power to the entire unit, including the
condensate evaporator and the lights. This switch is located behind a lift up panel
on the unit base.
Light Switch
The unit has a light switch that turns on and off the interior lights of the unit. This
switch is located below the lift up panel on the unit base.
Electronic Control
This control is located behind a lift up panel on the unit base.
Using Electronic Temperature Control (Refrigerated Models Only)
DIGITAL DISPLAY
SET POINT ADJUST MODE
POWER TO CONTROL ON/OFF
AND SET POINT UP ADJUST
MANUAL DEFROST AND
SET POINT DOWN ADJUST
COMPRESSOR RUN
INDICATOR
DEFROST MODE INDICATOR
ALARM INDICATOR
Button Overview
Press and hold this button for 3 seconds to turn
system on (if off) or off (if on).
Also used to adjust set point when in set point
adjust mode
Press to enter set point adjust mode, confirm set
point changes, and mute alarms.
Press and hold this button for 3 seconds to initiate
a manual defrost (and cancel defrost if initiated), also
adjusts set point down when in set point adjust mode
POWER SWITCH
ELECTRONIC
CONTROL
/ DISPLAY
LIGHT SWITCH
IMSS E3265-20
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Powering on control
To turn refrigeration control power on, press and hold for approx. five seconds.
The display will read “On” while the button is depressed. When the control powers on,
the display will read the current set point numbers 1 thru 9. The compressor run
indicator will illuminate on the display, meaning that the compressor is running.
(Note: the control may already be in the on mode when shipped from factory).
To turn refrigeration control power to off, press and hold for approx. five seconds. The
display will read “Off” while the button is depressed. When the control powers off the
display will flash back and forth between the current set point and “Off”. The
compressor run indicator will be off on the display. When refrigeration control is in
the off-mode cabinet lights and evaporator fans will still operate, but the compressor
will not turn on causing the case to gradually reach room temperature.
Adjusting the set point
The set point is what determines how cold the display case will hold food and
beverage. To adjust the set point press and hold the button approx. 5 seconds
until the display begins to flash a number. Then press the use the button to scroll
number up (colder) or press the button to scroll number lower (warmer). There
are nine (9) available set points numbers, the higher the number of the set point, the
colder the display case will run, with setting “9” being the coldest and setting “1” being
the warmest. Once you have chosen your desired setting press the button again
to confirm your choice.
IMSS E3265-20
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Entering manual defrost mode
To initiate a manual defrost press and hold the button approx. 5 seconds. The
control will read “dEF” while the button is being held. The defrost is initiated when the
defrost mode indicator illuminates on the display. The control display will then
return to reading the set point. when the defrost mode indicator turns off the defrost
is complete and the compressor will turn back on illuminating the compressor run
indicator .
Error codes
It is possible for error codes to be displayed on the control screen. In the event of a
malfunction an alarm will sound and the alarm indicator will be displayed on the
display. An error code or codes will flash intermittently on the display. If there are
multiple codes, the display will continuously cycle through them. The following photo
shows error code “E0” as an example.
Mute: You may mute the alarm by pressing and releasing the wrench button. The red ringing bell
and all error codes will still be displayed. When the fault is remedied the control will return to
normal operation and will automatically clear the codes from the display.
Carel Control
EO = Air sensing probe - Open or shorted
E1 = Evap. coil probe - Open or shorted
IMSS E3265-20
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Initial Start-Up
After all the checks outlined in the installation section of this manual have been made, the
case is ready to be put into service. Turn on the Power at the breaker box and flip the
Power Switch and Light Switch on unit to the on position. At start up from a warm unit, it is
recommended that the temperature control is set at a warm setting, such as After the unit
has gone through several cycles, change the control to a mid-range setting, then to a
colder setting if necessary to maintain desired product temperature
NOTICE: This refrigerated display case is designed to operate
in a maximum environment of 75 DEG. F and 55% relative
humidity. Exceeding these limits will cause poor case
performance, excessive sweating & overflow condensate pan.
Placing Product into Case
- Do not exceed 75 pounds of weight per shelf. Heavy product should be distributed
evenly across the entire shelving area.
- Determine desired shelving location before placing product in case. Product must be
removed to readjust shelf location.
*Do not store explosive or flammable substances in this appliance. (such as aerosol cans).
- Allow a minimum of 2” between the top of product and bottom of shelf.
- Do not overhang the front or rear of shelves with product. Improper clearance in front
and the rear of shelf will block the refrigerated airflow and will cause product loss.
-Do not block the slots along the front and rear air discharge slots. Covering these slots
will block the refrigerated airflow and could cause product loss.
-The display deck is removable for cleaning and can become dislodged in shipment. To
ensure proper airflow and performance of the case, make sure that the display deck is
pushed completely down.
-Allow refrigerated models to run for at least two hours before placing pre-chilled
product into unit.
NOTICE: CASE MUST BE STOCKED WITH PRE-CHILLED PRODUCT
ONLY.
CLEANING INSTRUCTIONS
Acrylic Air Deflector Cleaning
NOTICE: Clear acrylic air deflector requires special washing procedures
to prevent hazing and yellowing of material.
NEVER USE paper towels (wet or dry) for cleaning or drying and never use a dry towel.
NEVER USE a glass cleaner of any kind.
Lightly dust (not wipe) surface with a damp Microfiber towel or chamois. The surface can
then be washed using a small amount of dishwashing detergent such as Dawn or Joy and
lukewarm water. Use a Microfiber towel or chamois, applying only light pressure. The cloth
or chamois must be kept free of grit by frequently rinsing. Rinse the surface with clear water
and dry by blotting with a damp Microfiber towel or chamois.
IMSS E3265-20
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Daily Cleaning
The case should be cleaned thoroughly, as described in the weekly cleaning
section, before it is used for the first time.
NOTICE: Avoid splashing or soaking any electrical components with
water to prevent electrical damage to the case.
NOTICE: Shut off lights and power switches and remove all products
from the case. Allow sufficient time for the unit to reach room
temperature before proceeding with cleaning.
NOTICE: Remove all products from the case before proceeding with
cleaning procedure.
NOTICE: Acrylic air deflector requires special washing procedures to
prevent hazing and yellowing of material. Clean as described
in “Acrylic Air Deflector Cleaning” section of this manual.
Note: For major spills or foreign material buildup use complete weekly
cleaning instructions.
Note: Detergents are not recommended and do not use abrasive cleaners or
pads to prevent scratching of surfaces.
1. Dip rag in warm soapy water and ring out thoroughly. Wipe the entire interior
of case and dry with soft dry towel.
2. The remaining exterior surface should be wiped down using any ammoniated
cleaners or soapy warm water and dried with soft dry towel.
3. IMPORTANT: Cleaning the clear acrylic plastic front air deflector. Clean
as described in “Acrylic Air Deflector Cleaning” section of this manual.
Weekly Cleaning
NOTICE: Avoid splashing or soaking any electrical components with
water to prevent electrical damage to the case.
NOTICE: Shut off lights and power switches and remove all products
from the case. Allow sufficient time for the unit to reach room
temperature before proceeding with cleaning.
NOTICE: Remove all products from case before proceeding with
cleaning procedure.
NOTICE: Acrylic front air deflector requires special washing procedures
to prevent hazing and yellowing of material.
Note: Detergents are not recommended and do not use abrasive cleaners or
pads to prevent scratching of surfaces.
IMSS E3265-20
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SHELVES (4)
DISPLAY DECK
FAN SHROUD
FAN SHROUD
FAN SHROUD
RETAINER SCREWS (2)
DISPLAY DECK
DISPLAY DECK
DISPLAY DECK
TOWER SIDE PANEL
LATCH (4)
TOWER SIDE PANEL
TOWER INNER PANEL
(THERE IS NO INNER PANEL
ON
IMSS
8
4 MODEL)
ILLUSTRATION IS TYPICAL,
SOME MODELS MAY HAVE MORE PANELS, SHELVES AND DISPLAY DECKS
1. Remove interior shelving from unit as described in the “Shelving Installation and
Removal” section of this manual.
2. Dip rag in warm soapy water and ring out thoroughly. Clean all shelves and shelf
brackets and dry with soft dry towel.
3. Remove tower side panels by lifting (4) latch levers and pulling tower side panel out
away from tower.
4. Remove the tower inner panel by lifting panel up until retaining pins clear key slots
hole. Pull panel out of tower.
5. Dip rag in warm soapy water and ring out thoroughly. Clean the tower side panels,
tower inner panels and inside both tower ends. Dry with soft dry towel
6. Lift the display decks up and out of evaporator tub.
7. Remove the fan shroud assembly by removing (4) retaining screws from the outer
flange and (2) from the inner flange. Lift the fan shroud assembly and reach in and
unplug the evaporator fan motor cord(s). Lift fan shroud assembly out of tub.
8. Clean the display deck(s) using warm soapy water and a brush. Rinse thoroughly
and allow dry. Wipe off fan shroud assembly (do not rinse or submerge fan motors).
9. Clean the entire interior of the case using warm soapy water. Wipe off all soapy
water with a damp cloth and allow it to dry. (DO NOT use solvents such as Acetone,
Benzene, Carbon Tetrachloride, and Lacquer Thinners)
10. IMPORTANT: Cleaning the clear acrylic plastic front air deflector. Clean
as described in “Acrylic Air Deflector Cleaning” section of this manual.
11. Reassemble all components in reverse order.
NOTE: Depending on the amount of usage and spillage of foreign material, some
fasteners may have to be removed, and parts disassembled to allow proper cleaning of
the unit.
IMSS E3265-20
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MAINTENANCE
IMPORTANT: Read this Section of this manual located on page 5.
“REFRIGERATION WARNING &INSTALLATION-REPAIR-DECOMMISSIONING”
All refrigeration and electrical work must be performed by certified technicians.
Cleaning Condenser Coil
NOTICE: Condenser coil or optional air filter must be cleaned a
minimum of twice per month to ensure proper refrigeration
performance and prevent compressor failure. In some
environments it may be necessary to clean more frequently.
FAILURE TO CLEAN CONDENSER COIL WILL VOID
COMPRESSOR WARRANTY.
It is very important that the Condenser coil or optional air filter is cleaned twice
per month to ensure proper refrigeration performance and to prevent compressor
failure. In some environments, it may be necessary to clean more frequently.
Failure to clean condenser coil will void condenser warranty. This procedure is
for Self-Contained models. The remote condenser coil must also be cleaned at
the same intervals.
1. Disconnect power to the unit.
2. On IMSS60 and IMSS84 Remove the side panel with the narrow set of louvers
and on IMSS120 remove panels from both sides at the end the control panel is
located. See the illustration in the “Bottom Panel Removal” section of this manual
for panel clarification.
Carefully vacuum the front surface of condenser coil. Take care not to bend coil
fins with vacuum cleaner nozzle.
-If equipped with optional air filter remove filter and carefully vacuum the front
surface of condenser coil. Take care not to bend coil fins with vacuum cleaner
nozzle. Wash filter using warm soapy water, rinse, and let dry. Apply a generous
coat of filter coat adhesive to both sides of filter. (Filter coat adhesive is available
through any restaurant supply distributor.) Recommended Super Filter Coat
NOTE: Failure to coat filter with a fresh coat of filter adhesive after
cleaning will prevent filter from working properly. Failure to do so
will allow the condenser coil to plug, which will affect refrigeration
performance and could cause compressor failure.
3. Reinstall side panel(s).
VACUUM FRONT
SURFACE OF
CONDENSER COIL
IMSS E3265-20
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SERVICE INFORMATION
Before any service work
is performed on the
case, make sure all
power is disconnected
to the case.
IMPORTANT: Read this Section of this manual located on page 5.
“REFRIGERATION WARNING &INSTALLATION-REPAIR-DECOMMISSIONING”
All refrigeration and electrical work must be performed by certified technicians.
To find a service company in your area, please visit our website at
www.federalindustries.com. There you can also find self-service tools to
help you get the answers you need faster!
For Warranty Service Requests & ALL Technical Support please contact:
- Phone: (800) 356-4206 and choose the Tech Support/Warranty Option
For Warranty Compressors please contact the Parts Department:
- Phone: (800) 356-4206 and choose the Warranty Parts Option
Federal Industries has partnered with Parts Town for ALL Non-Warranty Part
Identification, Pricing, Lead Times, Orders & Freight Quotes. Please contact Parts
Town directly if you need parts:
- Website: PartsTown.com
- Phone: 833-809-8188
CAUTION
RISK OF ELECTRIC SHOCK
DISCONNECT POWER BEFORE
SERVICING UNIT
IMSS E3265-20
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Pre-Service Checklist
You may avoid the cost and inconvenience of an unnecessary service call by first
reviewing this checklist of frequently encountered situations that can cause
unsatisfactory case performance.
CAUTION: Before servicing the case, turn off power at the main breaker of fuse
box.
Case Does Not Operate
Check for disconnected power supply.
Check for tripped breaker on blown fuse.
Check that the thermostat display is on and that the green indicator light
is lit.
Lights Do Not Operate
Check that the light switch is on.
Check for tripped breaker or blown fuse.
Check that light housing cords are plugged in correctly to sockets in the
tower
Case Temperature Too Warm
Check that the cold air inlet and outlet slots are not blocked.
Check for a blocked or dirty condenser coil.
Check for cold airflow. Lack of adequate cold airflow could indicate a
defective evaporator fan or a blocked evaporator coil. Check that paper or
foreign materials are not blocking the evaporator. If the evaporator coil is
blocked due to excessive frost, put it into manual defrost. Excessive frost
can build up overtime if the case is set too cold or if there is excessive
humidity in the store.
Check all the fans in the evaporator compartment and tower are running.
Case Sweating Note: Some interior sweating is normal on this case.
Check room ambient – Case is designed to operate in an environment not
to exceed 75ºF and 55% relative humidity.
Check all the fans in the evaporator compartment and tower are running.
Overflow of Condensate Pan
Check that the drains in bottom of tub floor is not plugged.
Check that drains trap to the condensate pan is not plugged
Overflow of Optional Condensate Pump:
Check that the drains in bottom of tub floor is not plugged.
Check that drains trap to the condensate pan is not plugged
Check that drains lines from pump are not plugged or pinched.
Check to see that pump float is operating correctly.
Verify that pump is plugged in and has power.
Replace pump if still not pumping condensate.
IMSS E3265-20
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Special Service Situations
IMPORTANT: Read this Section of this manual located on page 5.
“REFRIGERATION WARNING &INSTALLATION-REPAIR-DECOMMISSIONING”
All refrigeration and electrical work must be performed by certified technicians
There are rare occasions when the refrigerant charge must be evacuated from a
case to perform service work. In those situations, Federal Industries
recommends that the refrigerant charge be evacuated into a recovery system to
prevent the possibility of hydrofluoro olefin (HFO) from being released into the
atmosphere.
The release of HFO into the atmosphere is a potential source of global warming.
Note the condensing unit that was supplied with this case has a receiver tank
large enough to hold all the charge you may be able to pump down the system
when service is required.
If moisture or liquid is observed around or under a Federal Industries case, an
immediate investigation should be made by qualified personnel to determine the
source of the moisture or liquid. The investigation made should determine if the
case is malfunctioning or if there is a simple housekeeping problem.
Moisture or liquid around or under a case is a potential slip / fall hazard for
persons walking by or working in the general area of the case. Any case
malfunction or housekeeping problem that creates a slip / fall hazard around or
under a case should be corrected immediately.
IMSS E3265-20
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SALE & DECOMMISSIONING
IMPORTANT: Read this Section of this manual located on page 5.
“REFRIGERATION WARNING &INSTALLATION-REPAIR-DECOMMISSIONING”
All refrigeration and electrical work must be performed by certified technicians
If you, the owner sells or gives away this Federal Industries case, it is the
owner’s responsibility to make sure that all safety labels and the Installation-
Service Manual are included with it. If you need replacement labels or manuals,
Federal Industries will provide them free of charge. Contact the customer service
department at Federal Industries at (800) 356-4206.
The customer service department at Federal Industries should be contacted at
the time of sale or disposal of your case so records may be kept of its new
location.
If you sell or give away your Federal Industries case, you should evacuate the
refrigerant charge before shipment. Federal Industries recommends that the
charge be evacuated into a recovery system to prevent the possibility of HFO’s
from being released into the atmosphere.
Refrigerant Recovery/Recycling/Disposal
When recycling or discarding case, refrigerants MUST BE handled according to
local, state and federal codes, requirements and regulations.
If disposing of a refrigerated case that uses ozone depleting chemicals in its
refrigeration system, make sure the refrigerant is removed by a qualified service
technician and properly disposed of.
If you intentionally release refrigerant into the atmosphere, you may be subject to
fines or other penalties (under regulation mandated by environmental regulators
and/or legislative edict.)
IMSS E3265-20
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ELECTRICAL DATA
Model IMSS60SC/IMSS84SC IMSS60R/IMSS84R
Power Supply, Volts 230 Volts 230 Volts
Frequency 60 Hertz 60 Hertz
Phase 1 Phase 1 Phase
Number of Wires 2 + GND 2 + GND
AMPS VOLTS AMPS VOLTS
Compressor 12.6/12.0 230 - -
Condenser Fan .8 230 - -
Base Fan - - .15 230
Evaporator Fan Motor (QTY 2 or 4) 0.15 ea. 230 0.15 ea. 230
Lights Power Supply 24V .8 230 .8 230
Condensate Pan Heater 7.8 230 - -
Condensate Pump - - .75 230
Refer to the rating plate data attached to side of base for Maximum Fuse Size and
Minimum Circuit Ampacity.
Model IMSS120SC IMSS120R
Power Supply, Volts 230 Volts 230 Volts
Frequency 60 Hertz 60 Hertz
Phase 1 Phase 1 Phase
Number of Wires 2 + GND 2 + GND
AMPS VOLTS AMPS VOLTS
Compressor 17.9 230 - -
Condenser Fan (QTY 2) .5 ea 230 - -
Evaporator Fan Motor (QTY 6) 0.15 ea. 230 0.15 ea. 230
Lights Power Supply 24V (QTY 2) 1.6 230 1.6 230
Condensate Pan Heater 9.0 230 - -
Condensate Pump - - .75 230
Refer to the rating plate data attached to side of base for Maximum Fuse Size and
Minimum Circuit Ampacity.
IMSS E3265-20
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CONTROL OPERATION
Electronic Control
This unit is equipped with CAREL temperature control. The control parameters are set at
the factory and cannot be manually changed in the field. Control parameter changes can
only be made by downloading a new set of parameters via a program chip supplied by
Federal Industries. The preset control parameters are listed on the chart in the Settings
Chart below.
Operation
The control uses two sensors, one located in the air stream, and one located on the
evaporator coil. The sensor located in the air stream is referred to as the temperature
control sensor. The sensor located on the evaporator coil is referred to as the coil
sensor.
The temperature control sensor is located inside the center tower at the top. The sensor
location is critical for proper operation on the unit. Do not move or relocate this sensor.
The coil sensor is strapped to the evaporator coil. This sensor location is critical for
proper operation of the unit. Do not move or relocate this sensor.
The temperature control is set to cut in at 39 degrees F. The Temp control cuts out at
14 degrees F at the coldest setting “9” and 28 degrees F at the warmest setting, ‘1’ on
the control display.
The temp control turns off the refrigeration system when you “press and hold” the top
arrow / power button for approx. 3 seconds until “OFF” flashes on display.
Condenser fan will run continuously once power is supplied to the appliance.
Defrost Cycle
The CAREL control is programmed to initiate defrost via two different methods. There
are 3 programmed defrost cycles in the case which will initiate a defrost cycle every 8
hours. The unit does not have a time clock so the defrost cycles cannot be set for any
specific time of day.
The unit also has an ‘On demand’ defrost feature that will initiate a defrost when the
temperature differential between the evaporator temperature and the air temperature is
more than 15 degrees for 5 minutes after 30 minutes into the refrigeration cycle.
The unit is equipped with a maximum run timer that is preset at the factory for 75
minutes on. If the temperature control does not reach the cut out set point after running
for one hour, the timer will turn the compressor off for a minimum of 2 minutes.
Do not use other means to accelerate the defrosting cycle process other than those
recommended by the manufacturer.
IMSS E3265-20
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CONTROL PARAMETERS IMSS60 & 84 SELF-CONTAINED
Table 1 - Control Parameters
Parameter Description
Control Setpoint
1 2 3 4 5 6 7 8 9
Compressor Cut out [°F]
28.0
26.2
24.5
22.7
21.0
19.2
17.5
15.7
14.0
Compressor Cut in [°F]
39.0°
Compressor Min On Time
5 min
Compressor Min Off Time
2 min
Compressor Max Run Time
75 min
Defrost Termination Temp [°F]
43.0
Time to first defrost
8 hr.
Time to subsequent defrost
8 hr.
Maximum Defrost duration
30 min
Defrost on demand differential [°F]
15.0
Delay for defrost on demand
5 min
Time delay to the next defrost on demand
30 min
\Table 2 - Temperature Probe Common Resistance Chart
Probe Temp
Maximum
Resistance [
Ω
]
Normal Resistance [Ω] Minimum Resistance [Ω]
32°F
(0°C)
27
.83
27.28
26.74
77°F
(25°C)
10.1
10
9.9
212°F
(100°C)
1
0.97
0.94
IMSS E3265-20
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CONTROL PARAMETERS IMSS120 SELF-CONTAINED
Table 3 - Control Parameters
Parameter Description
Control Setpoint
1 2 3 4 5 6 7 8 9
Compressor Cut out [°F]
32.0
30.5
29.0
27.5
26.0
24.5
23.0
21.5
20.0
Compressor Cut in [°F]
39.0°
Compressor Min On Time
5 min
Compressor Min Off Time
2 min
Compressor Max Run Time
75 min
Defrost Termination Temp [°F]
43.0
Time to first defrost
8 hr.
Time to subsequent defrost
8 hr.
Maximum Defrost duration
30 min
Defrost on demand differential [°F]
15.0
Delay for defrost on demand
5 min
Time delay to the next defrost on demand
30 min
\Table 4 - Temperature Probe Common Resistance Chart
Probe Temp
Maximum
Resistance [
Ω
]
Normal Resistance [Ω] Minimum Resistance [Ω]
32°F
(0°C)
27.83
27.28
26.74
77°F
(25°C)
10.1
10
9.9
212°F
(100°C)
1
0.97
0.94
IMSS E3265-20
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38
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CONTROL PARAMETERS ALL 1MSS REMOTES
Table 5 - Control Parameters
Parameter Description
Control Setpoint
1 2 3 4 5 6 7 8 9
Compressor Cut out [°F]
30.0
28.0
26.0
24.0
22.0
20.0
18.0
16.0
14.0
Compressor Cut in [°F]
38.0°
Compressor Min On Time
5 min
Compressor Min Off Time
2 min
Compressor Max Run Time
60 min
Defrost Termination Temp [°F]
43.0
Time to first defrost
6 hr.
Time to subsequent defrost
6 hr.
Maximum Defrost duration
30 min
Defrost on demand differential [°F]
18.0
Delay for defrost on demand
5 min
Time delay to the next defrost on demand
30 min
\Table 6 - Temperature Probe Common Resistance Chart
Probe Temp
Maximum
Resistance [
Ω
]
Normal Resistance [Ω] Minimum Resistance [Ω]
32°F
(0°C)
27.83
27.28
26.74
77°F
(25°C)
10.1
10
9.9
212°F
(100°C)
1
0.97
0.94
IMSS E3265-20
-
39
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REFRIGERATION OPERATION
IMPORTANT: Read this Section of this manual located on page 5.
“REFRIGERATION WARNING &INSTALLATION-REPAIR-DECOMMISSIONING”
All refrigeration and electrical work must be performed by certified technicians
Self-Contained Models R454C
Refrigeration R
454c
Charge
IMSS60
4.
5
Pounds
Refrigeration R
454c
Charge
IMSS84
4.
5
Pounds
Refrigeration R
454c
Charge
IMSS120
6.5
Pounds
The self-contained models are shipped from the factory with a completely operational
R454C refrigeration system and require no modifications or adjustments upon
installation. Case must be installed as per the installation section of this manual to
provide proper condensing air cooling.
Self-Contained Refrigeration Operation
The unit temperature is controlled by the electronic control and timers outlined in the
control section of this manual. Condenser
Note: The condenser fan runs continuously.
Remote Models
BTU Requirements
IMSS60R
12,800 BTU’S @20F EVAP / 90F Ambient
IMSS84R
16,400 BTU’S @20F EVAP / 90F Ambient
IMSS120R
25,200 BTU’S @20F EVAP / 90F Ambient
Pressure Control Settings
- Use pressure gauges to set pressure control.
Refrigeration R4
49
A
Charge
CHARGED IN FIELD
Remote Low Press. Switch Cut In
50
psi
Remote Low Press. Switch Cut Out
15 psi
Adjustable Head Master
200 psi
Remote High Press. Switch Cut Out
400 psi
The remote models are designed to use R449A refrigerant and shipped from the factory
with the evaporator coil, expansion valve, sight glass and refrigerant solenoid valve.
Drier filter must be installed in the field for proper operation. Electronic control runs
identical to the Self-Contained models except the electronic control opens and closes a
refrigeration solenoid valve located on the suction line instead of turning on and off a
compressor. The solenoid valve closes and shuts off the refrigeration flow to the unit
and initiates a pump down cycle. This will allow the remote low-pressure switch to open
and shut off the remote compressor.
IMSS E3265-20
-
40
-
The condensing unit and pressure controls are optionally supplied from the factory for
remote location installation. The condensing unit must be mounted and wired by the
installer. The high low-pressure switch must be wired in series with the compressor
power supply as shown in diagram on the next page.
Remote Condensing Unit Installation
IMPORTANT: Read this Section of this manual located on page 5.
“REFRIGERATION WARNING &INSTALLATION-REPAIR-DECOMMISSIONING”
All refrigeration and electrical work must be performed by certified technicians
1. Mount condensing unit as close as possible to the remote display case as practical.
Follow condensing unit manufacturer guidelines for proper piping and distance
requirements.
2. All refrigeration and/or electrical materials between the condensing unit and display
case are to be supplied by installing contractor.
3. Route properly sized and designed refrigeration lines from the condensing unit to the
cabinet.
Horizontal suction lines should be pitched downward towards the condensing unit at
least ½” per 10’ run to aid the oil drainage. A “P” trap must be installed in the suction
line at the foot of every riser to insure oil return. Dry nitrogen must be used to flow
through tubing while brazing refrigeration lines.
4. The suction line must be insulated the entire length with Armaflex (or equivalent). Do
not run liquid line inside insulation with suction line.
5. The remote high/low-pressure control must be mounted, wired and set pressures by
the installer.
6. Leak check condensing unit, cabinet, and all connecting tubing. Cabinet and
condensing unit tubing should be checked using leak detecting equipment to ensure
no leaks occurred during shipping or from rough handling.
Make certain all refrigeration valves are opened and evacuate system to 500
microns. Charge the system with refrigerant type specified on the data plates.
REMOTE
HIGH LOW
PRESSURE
CONTROL
LIQUID LINE
SUCTION LINE (INSULATED)
REMOTE
CONDENSING
UNIT
EVAPORATOR
COILS
DISPLAY CASE
EXPANSION
VALVE
HIGH
LOW
LIQUID LINE
SOLENOID VALVE
SIGHT GLASS
DRIER/FILTER
FIELD CONNECTION
HOT
FUSED
POWER
SUPPLY
DEFROST
TERMINATE
PROBE
ELECTRONIC
CONTROL
AIR TEMP. CONTROL PROBE
FUSED
CASE
POWER
IMSS E3265-20
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41
-
Electronic Expansion Valve (EEV)
A traditional TXV uses springs and a temperature bulb to open and close a valve port that
controls the flow of refrigerant entering the evaporator coil. An electronic expansion valve
(EEV) controls the refrigerant flow much more precisely, increasing the performance and
efficiency of the refrigeration system. The EEV controls the flow of Refrigerant by opening and
closing the valve port based on the response to signals sent to the EEV by an electronic
controller. The electronic Control bases these signals by processing information provided from a
temperature sensor and pressure transducer located on the discharge side of the evaporator coil.
These sensors monitor the evaporator superheat and protects the compressor from any liquid
flood back under low superheat conditions.
EEV Controller Settings
The electronic expansion valve controller also allows the use of different types of refrigerants
without the need to change the expansion valve.
The controller is set from the factory to run on 449A refrigerant and will not need any changes to
the control unless another refrigerant is used.
Note: Check your State and Local regulations for approved refrigerants for your install
location. Federal Industries is not liable for any alternate refrigerants used.
The control is located on the side of the case opposite the condo pump.
Note: Never change any of the other setting other than the refrigerant type. It may also be
necessary to change the superheat setting only when using a different refrigerant.
Changing Refrigerant
Access the set point mode by pressing and holding the button until Ctl displays on the
screen.
Use the up or down arrows to advance through the available set points until rFG
displays on the screen and press the botton.
Use the up or down arrows until the desired refrigeration displays on the screen and
press and hold the button until rFG once again displays on the screen.
Press the to return to escape the settings menue.
Changing Superheat
Access the set point mode by pressing and holding the button until Ctl displays on the
screen.
Use the up or down arrows to advance through the available set points until SSP
displays on the screen and press the botton.
Use the up or down arrows to set the desired superheat displays on the screen and
press and hold the button until SSP once again displays on the screen.
Press the to return to escape the settings menue.
IMSS E3265-20
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42
-
PARTS LIST
IMSS E3265-20
-
43
-
Case Wiring Diagrams
Self-Contained IMSS60SC
IMSS E3265-20
-
44
-
Self-Contained IMSS84SC
IMSS E3265-20
-
45
-
Self-Contained IMSS120SC
IMSS E3265-20
-
46
-
Remote IMSS60R
IMSS E3265-20
-
47
-
Remote IMSS84R
POWER SUPPLY
CAREL
CONTROL
W
4
5 9
6 7 10
8
BLK
POWER
SWITCH
LIGHT
SWITCH
R
W
BLK
BLK
BLK
Y
208-240V/1PH/60HZ
L1
L2
N
CONDO PAN/
PUMP
BLK
BLK/RIB
BLK
M
BLK
BLK/RIB
BLK
BLK
BLK/RIB
BLK
M
BLK
BLK/RIB
BLK
M
M
ECSS60R
IMSS60R & IMSS84R
91-21555-1 6/7/24
IMSS84 ONLY
IMSS84 ONLY
R
BLK
BLK
EVAP.
FANS
R+
BL-
B/R
B/BLK
B/R
BLK
BLK
BLK
R
R
R
R
R
BLK
BLK
G
G
G
G
DEFROST PROBE
PB2
TEMP PROBE
PB1
W
B
COLOR CODE
B = BLUE
Y = YELLOW
W = WHITE
R = RED
BLK = BLACK
BRW= BROWN
DARK LINES REPRESENT
(3) CONDUCTOR CORD
G = GREEN
IF LIGHT WIRES
ARE B/BL & B
TIE B/BL TO RED
& B TO BLUE ON
POWER SUPPLY
IMSS MODELS ONLY
FAN
4 5
RELAY
M
REMOTE
COMPRESSOR
HI/LO PRESS SW
Y
Y
OPTIONAL REMOTE
MOUNTED & WIRED
COMPONENTS
ALL FIELD WIRED
SEPARATE
POWER SUPPLY
PRESSURE
CONTROL
REMOTE
REFRIG
SOLENOID
RIBBON
CABLE
TEMP 1 TEMP 2Red
TEMP 3
Blk Grn
Sh
B
A
RSV-Blue
Empty
Org
Red
Yel
Grn
Red
Wht
Blk
Blk
TEMP & VALVE
CONTROL
PRESS. TRANS.
TEMP SENSOR
12
3
45
EEV
BLK
R
TOP LAMP
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
TOP LAMP
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
B/BLK B/BLK
B/RB/R
TOP LAMP
TOP LAMP
IMSS E3265-20
-
48
-
Remote IMSS120R
R
R
CONDENSATE PUMP
OR EVAPORATOR
BLK
BLK
G
POWER
R
SWITCH
BLK
R
Y/G
L1
L2
N
LIGHT SWITCH
R
BLK
Y
R
BLK
Y
BLK
BLK
REFRIGERATION
SOENOID
BLK
CAP EXTRA
BLACK WIRE
IF NOT USED
BLK
BLK
EVAP.
FANS
BLK/RIBBLK/RIB
BLK
BLK
BLK
M
PLUG
M
BLK
BLK/RIB
BLK
M
BLK
BLK/RIB
BLK
BLK
BLK/RIB
BLK
BLK
EVAP.
FANS
BLK/RIBBLK/RIB
BLK
BLK
BLK
M
PLUG
M
BLK
BLK/RIB
BLK
M
BLK
BLK/RIB
BLK
BLK
BLK/RIB
BLK
B
BRW
RIB
BASE FAN OPTIONAL
B
W
W
B
8 9 10 11
5 4 6 7
DEFROST PROBE PB2
TEMP PROBE PB1
W
B
G
B/BL
BL -
R +
G
BLK
R
LIGHT CIRCUIT
TYPICAL (2)
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
TOP LAMP
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
SHELF LAMP
- B
+B(RIB)
TOP LAMP
IMSS120 REMOTE ITC LED 91-21556-1 6/7/24
B/R
B/BL
B/BL
B/BL
B/BL
B/BL
B/BL
B/BL
B/BL
B/BL B/BL
B/R
B/R
B/R
B/R
B/R
B/R
B/R B/R
RIBBON
CABLE
TEMP 1 TEMP 2Red
TEMP 3
Blk Grn
Sh
B
A
RSV-Blue
Empty
Org
Red
Yel
Grn
Red
Wht
Blk
Blk
TEMP & VALVE
CONTROL
PRESS. TRANS.
TEMP SENSOR
12
3
45
EEV
R
BLK
FAN
4
5
RELAY
M
REMOTE
COMPRESSOR
HI/LO PRESS SW
Y
Y
OPTIONAL REMOTE
MOUNTED & WIRED
COMPONENTS
ALL FIELD WIRED
SEPARATE
POWER SUPPLY
PRESSURE
CONTROL
REMOTE
COLOR CODE
B = BLUE
Y = YELLOW
W = WHITE
R = RED
BLK = BLACK
BRW= BROWN
DARK LINES REPRESENT
(3) CONDUCTOR CORD
G = GREEN
IF LIGHT WIRES
ARE B/BL & B
TIE B/BL TO RED
& B TO BLUE ON
POWER SUPPLY
TOP LAMP
TOP LAMP
IMSS E3265-20
-
49
-
California Residents Only.
WARNING
This product can expose you to chemicals including chromium which is known to the State of
California to cause cancer and birth defects or other reproductive harm. For more information
go to www.P65Warnings.ca.gov
IMSS E3265-20
-
50
-
REV
CHANGE RECORD
APP’D
DATE
ECN#
0
RELEASED LPR 9/18/2024 3913
A TABLE OF CONTENTS ADDED UL WARNINGS AND PARTS LIST
UPDATED
LPR 1/28/25 3913
