Glass Door Merchandiser
Refrigerator and Freezer
Service, Installation and Care Manual
Please read this manual completely before attempting to install or operate this equipment.
Notify carrier of damage! Inspect all components immediately.
I M P O R T A N T I N F O R M A T I O N
R E A D B E F O R E U S E
PLEASE SAVE THESE INSTRUCTIONS!
Service and Installation Manual
For warranty service, call 833-474-0367 2
C
OMM
ECIAL REFRIGERATOR SAFETY
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read and
obey all safety messages.
Our product instructions will be uploaded on our company official website.
This is the Safety Alert Symbol. This symbol alerts you to potential hazards that can
kill or injure you and others. All safety messages will follow the Safety Alert Symbol
and either the words” DANGER”, “WARNING” or “CAUTION”.
Danger means that failure to heed this safety
statement may result in severe personal injury or
death.
Warning means that failure to heed this safety
statement may result in extensive product
damage, serious personal injury, or death.
Caution means that failure to heed this safety
statement may result in minor or moderate
personal injury, or property or equipment damage.
All safety messages will alert you to what the potential hazard is, tell you how to reduce the chance of injury,
and let you know what can happen if the instructions are not followed.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly
qualified persons in order to avoid a hazard.
This appliance is not intended for use by persons (including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
This appliance can be used by children aged from 8 years and above and persons with reduced physical
sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or
instruction concerning use of the appliance in a safe way and understand the hazards involved. Children
shall not play with the appliance. Cleaning and user maintenance shall not be made by children without
supervision.
Keep the appliance and its cord out of reach of children less than 8 years.
Do not store explosive substances such as aerosol cans with a flammable propellant in this appliance.
The appliance use flammable insulation blowing gas C5H10, disposal of the appliance shall in accordance
Service and Installation Manual
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w
ith the regulations of local authorities.
The k
ey for appliance electric box should be safe kept by qualified persons in order to avoid a hazard
WARNING: Keep ventilation openings, in the appliance enclosure or in the built-in structure, clear of
obstruction.
WARNING: Do not use mechanical devices or other means to accelerate the defrosting process, other than
those recommended by the manufacturer.
WARNING: Do not damage the refrigerant circuit.
WARNING: Do not use electrical appliances inside the food storage compartments of the appliance, unless
they are of the type recommended by the manufacturer.
Handling, moving, and use of the refrigerator or freezer to avoid either damaging the refrigerant tubing, or
increasing the risk of a leak
L’opération, le mouvement et l’utilisation du réfrigérant ou le congélateur doivent éviter les dommages du
tuyau réfrigérant ou le rique de la fuite.
Caution – Risk of Fire or Explosion due to Flammable Refrigerant Used. Follow Handling
Instructions Carefully in Compliance with U.S. Government Regulations.
Component parts shall be replaced with like components and that servicing shall be done by factory
authorized service personnel, so as to minimize the risk of possible ignition due to incorrect parts or
improper service.
Les pièces de rechange doivent être remplacées par les components relatifs et les opérations doivent être
faites par les professionnels afin de minimaliser le risque d’allumage à cause des parts incorrects ou des
opérations impropres.
CAUTION – Risk Of Fire Or Explosion Due To Puncture Of Refrigerant Tubing; Follow Handling Instructions
Carefully. Flammable Refrigerant Used
DANGER: Risk of child entrapment. Before you throw away your old refrigerator or freezer:
Take off the doors
Leave the shelves in place so that children may not easily climb inside.
This equipment is not suitable for installation in non-commercial or residential application.
The optimum performance temperature is a Maximum of an ambient temperature of 85°F. If this
appliance is operated at or above 95°F ambient and humidity above 70% the unit will cease to
function properly and would not be covered by the warranty.
CAUTION: If this equipment is operated outside these conditions, maintaining temperature
and excessive frost accumulation with the equipment will occur that are not covered by the
warranty.
Service and Installation Manual
For warranty service, call 833-474-0367 4
CONTENTS
All rights reserved. Reproduction without written permission is prohibited.
RECEIVING & INSPECTING EQUIPMENT..4
SPECIFICATIONS..5
INSTALLATION....6
OPERATION....7
MAINTENANCE..9
CIRCUIT DIAGRAM..12
STANDARD WARRANTIES..27
SERIAL NUMBER INFORMATION
The serial number of all self-contained refrigerators and freezers is located inside the unit on the left hand
side near the top on the wall.
Always have the serial number of your unit available when calling for parts or service.
This manual covers standard units only. If you have a custom unit, consult the customer service department
at the number listed on the last page.
RECEIVING AND INSPECTING THE EQUIPMENT
Even though most equipment is shipped crated, care should be taken during unloading so the equipment is not
damaged while being moved into the building.
1. Visually inspect the exterior of the package and skid or container. Any damage should be noted and reported
to the delivering carrier immediately.
2. If damaged, open and inspect the contents with the carrier.
3. In the event that the exterior is not damaged, yet upon opening, there is concealed damage to the equipment,
notify the carrier. Notification should be made verbally as well as in written form.
4. Request an inspection by the shipping company of the damaged equipment. This should be done within 10
days from receipt of the equipment.
5. Be certain to check the compressor compartment housing and visually inspect the refrigeration package. Be
sure lines are secure and base is still intact.
6. Freight carriers can supply the necessary damage forms upon request.
7. Retain all crating material until an inspection has been made or waived.
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SPECIFICATION
Y-
X: 208V~230V/60Hz
W-Y: 115V/60HZ
SWING DOOR REFRIGERATORS
MODEL# V/Hz/Ph
AMPS
HP
Shelf Size
Max Weight
Load per
Shelf
Max Weight
Load per
Model
BTU
CHARGE
OZ
SHIP
WEIGHT
LBS
NEMA
PLUG
MGD-1DR-12-HC 115/60/1
3 1/5
19.8 x 18.0
35 lbs 837 lbs 1670
3.0 254 5-15P
MGD-1DR-16-HC 115/60/1
3 1/5
19.8 x 18.0
35 lbs 815 lbs 1670
3.0 282 5-15P
MGD-1DR-23-HC 115/60/1
3 1/5
21.6 x 24.3
53 lbs 776 lbs 1670
3.0 331 5-15P
MGD-1DR-26-HC 115/60/1
3 1/5
23.1 x26.1
60 lbs 765 lbs 1670
3.0 345 5-15P
MGD-2DR-36-HC 115/60/1
4.5 1/4
23.6 x 24.3
40 lbs 712 lbs 2380
3.7 375 5-15P
MGD-2DR-48-HC 115/60/1
4.5 1/4
21.6 x 24.3
57 lbs 610 lbs 2380
3.7 540 5-15P
MGD-3DR-70-HC 115/60/1
7.5 1/2
26.0 x 24.3
62 lbs 967 lbs 3200
5.29 741 5-15P
SLIDE DOOR REFRIGERATORS
MODEL# V/Hz/Ph
AMPS
HP
Shelf Size
Max Weight
Load per
Shelf
Max Weight
Load per
Model
BTU
CHARGE
OZ
SHIP
WEIGHT
LBS
NEMA
PLUG
MGD-2DR-47-HC 115/60/1
4.5 1/4
21.6 x 24.3
57 lbs 610 lbs 2380
3.7 540 5-15P
SWING DOOR FREEZERS
MODEL# V/Hz/Ph
AMPS
HP
Shelf Size
Max Weight
Load per
Shelf
Max Weight
Load per
Model
BTU
CHARGE
OZ
SHIP
WEIGHT
LBS
NEMA
PLUG
MGD-1DF-12-HC 115/60/1
5 1/2
19.8 x 18.0
35 lbs 815 lbs 2000
3.7 258 5-15P
MGD-1DF-16-HC 115/60/1
5 1/2
19.8 x 18.0
35 lbs 809 lbs 2000
3.7 289 5-15P
MGD-1DF-23-HC 115/60/1
8 1/2
21.6 x 24.3
53 lbs 756 lbs 2000
3.88 353 5-15P
MGD-1DF-26-HC 115/60/1
8 1/2
23.1 x26.1
60 lbs 745 lbs 2000
3.88 360 5-15P
MGD-2DF-36-HC 115/60/1
9 1 23.6 x 24.3
40 lbs 690 lbs 3650
5.29 368 5-15P
MGD-2DF-48-HC 115/60/1
9 1 21.6 x 24.3
57 lbs 456 lbs 3650
5.29 567 5-15P
MGD-2DF-48-DV-H
C
1115/208
~230/60/
6.5 1 21.6 x 24.3
57 lbs 456 lbs 3650
5.29 567 L14-20P
MGD-3DF-70-DV-H
C
115/208~
230/60/1
9 1-1/4 26.0 x 24.3
62 lbs 881 lbs 4500
5.29 829 L14-20P
Service and Installation Manual
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INSTALLATION
Location
Units represented in this manual are intended for indoor use only. Be sure the location chosen has a floor
strong enough to support the total weight of the cabinet and contents. A fully loaded unit can weigh as much
as 1500 pounds. Reinforce the floor as necessary to provide for maximum loading. For the most efficient
refrigeration, be sure to provide good air circulation inside and out.
Inside cabinet:
Do not pack refrigerator so full that air cannot circulate. The refrigerated air is discharged at the rear of the
unit. It is important to allow for proper air flow from the rear to the bottom of the unit. Obstructions to this air
flow can cause evaporator coil freeze ups and loss of temperature or overflow of water from the evaporator
drain pan. The shelves have a rear turn up on them to prevent this. However, bags and other items can still
be located to the far rear of the cabinet. Air is brought into the evaporator coil with fans mounted to the front
of the coil. Prevent obstruction by locating large boxes and tall stacks of product to the bottom of the cabinet.
Outside cabinet:
Be sure that the unit has access to ample air. Avoid hot corners and locations near stoves and ovens.
It is recommended that the unit be installed no closer than 2" from any wall with at least 12" of clear space
above the unit. Should it become necessary to lay the unit on its side or back for any reason, allow at least
24 hours before start-up so as to allow compressor oil to flow back to the sump. Failure to meet this
requirement can cause compressor failure and unit damage.
Leveling
A level cabinet looks better and will perform better because the doors will line up with the frames properly,
the cabinet will not be subject to undue strain and the contents of the cabinet will not move around on the
shelves. Use a level to make sure the unit is level from front to back and side to side. Units supplied with
legs will have adjustable bullet feet to make the necessary adjustments. If the unit is supplied with casters,
no adjustments are available. Ensure the floor where the unit is to be located is level.
Stabilizing
Models are supplied on casters for your convenience, ease of cleaning underneath and for mobility. It is very
important, however, that the cabinet be installed in a stable condition with the front wheels locked while in
use.
Standard warranties will be voided due to improper installation.
Electrical connection
Refer to the amperage data on page 3, the serial tag, your local code or the National Electrical Code to be
sure the unit is connected to the proper power source. A protected circuit of the correct voltage and
amperage must be run for connection of the line cord, or permanent connection to the unit.
The ON/OFF switch must be turned to OFF and the unit be disconnected from the power
source whenever performing service, maintenance functions or cleaning the
refrigerated area.
NOTE
DANGER
Equipment shipped with casters must be installed to promote proper air flow for the operation of the
cabinet and to maintain the Health Code for clean ability. Without the installation of the caster will
cause a void of warranty and Health Code violations. Be sure that the unit has access to ample air.
Avoid hot corners and location near ranges and oven. This equipment works be in a controlled
environment, with ambient temperature below 90°F (32°C). It is recommended that the unit be
installed no closer than 2” from any wall. This equipment is also supplies with “bumper” that must be
installed on the back of the unit. Failure to do so may cause compressor and other vital component
failure, and will void the equipment’s warranty.
Service and Installation Manual
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OPERATION
Do not throw items into the storage area. Failure to heed these
recommendations could result in damage to the interior of the cabinet.
Refrigerated cycle
Refrigerators: During the refrigeration cycle, the evaporator fans wilt run continuously even when one or
more doors are open. The door switch will activate the lights when opened.
1. Every 6 hours, the unit will turn off and to allow the evaporator coil to defrost. The controller now
displays the defrost symbol. When the coil temperature reaches 41°F or after 20 minutes of defrost, the
unit will turn on again.
2. Anti-condensation heaters on door frames work in conjunction with the compressor.
3. The factory setting for the temperature range is 34°F to 38°F.
Freezers: During the refrigeration cycle the controller supplies power to the condensing unit and evaporator
fan motors. The evaporator fans will run at any time when the evaporator coil temperature is below 54°F,
they will also keep running during when door is open but cycle off during a defrost period. The door switch
will activate the lights when opened.
1. Every 6 hours, the unit will turn off and electric heater will turn on to start the defrost cycle. The
controller now displays the defrost symbol. When the coil temperature reaches 45°F or after 20 minutes
of defrost, the unit will turn on again.
2. Anti-condensation heaters on door frames work in conjunction with the compressor.
3. The factory setting for temperature range is -7°F to -3°F
SOLID-STATE THERMOSTAT DESCRIPTIONS
1. FRONT PANEL COMMANDS
1.1 KEY FUNCTION
To display target set point; in programming mode it selects a parameter or confirm an
operation.
To start a manual defrost
To see the last temperature alarm happened; in programming mode it bro
wses the parameter
codes or increases the display value
To see the last temperature alarm happened; in programming mode it browses the parameter
codes or decreases the display value
KEY COMBINATION
To lock & unlock the keyboard
To enter in programming mode
To return to the room temperature display
CAUTION
Light Switch:
A light switch is located next to the on/off switch on the front of the bottom panel.
To switch the instrument off.
*Any alteration of the original programming of this control may cause temperature and
operation issues that are not covered by warranty.
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1.2 LED – Report Status
2. MAIN FUNCTIONS
2.1 HOW TO SEE THE SETPOINT
a. Push and immediately release the SET key: the display will show the set point value;
b. Push and immediately release the SET key or wait for 5 seconds to display the sensor value again.
2.2 HOW TO CHANGE THE SETPOINT
a. Push the SET key for more than 2 seconds to change the set point value;
b. The value of the set point will be displayed and the LED starts blinking;
c. To change the set value push the or key within 10s;
d. To memory the new set point value and push the SET key again or wait 10s.
2.3 HOW TO START A MANUAL DEFFROST
Push the key for more than 2 seconds and a manual defrost will start
OPERATION
2.4 HOW TO LOCK THE KEYBOARD
a. Press and hold the and keys for more than 3s
b. The “POF” message will be displayed and the keyboard will be locked. At this point, it will be possible only
to see the set point or the MAX or Min temperature stored
c. If a key is pressed more than 3s the ”POF” message will be displayed.
2.5 HOW TO UNLOCK THE KEYBOARD
Press and hold the and keys together for more than 3s, the “Pon” message display
3. ALARM SIGNALS
HOW TO SEE THE ALARM AND RESET
THE RECORDED ALARM
a. Push the or key, the alarm signal will
display
b. When the signal is displayed, press/hold
the SET key until the “rst” message is
displayed, and push the SET key again, the
“rst” message start blinking and the normal
temperature will display again.
LED
MODE
SIGNIFICATO
On
Compressor enabled
Flashing
Anti-short cycle delay enabled (AC parameter)
On
Defrost in progress
Flashing
Dripping in progress
On
Fans output enabled
Flashing
Fans delay after defrost
On
Measurement unit
Flashing
Programming mode
On
Measurement unit
Flashing
Programming mode
Service and Installation Manual
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MAINTENANCE
The power switch must be OFF and the unit disconnected from the power source
whenever performing service, maintenance functions or cleaning the refrigerated area.
Refrigerators and Freezers
The interior and exterior can be cleaned using soap and warm water. If this isn't sufficient, try ammonia and
water or a nonabrasive liquid cleaner. When cleaning the exterior, always rub with the "grain" of the stainless
steel to avoid marring the finish.
Do not use an abrasive cleaner because it will scratch the stainless steel and plastic and can damage the
breaker strips and gaskets.
Cleaning the Condenser Coil
The condenser coil requires regular cleaning, recommended is every 90 days. In some instances, you may
find that there is a large amount of debris and dust or grease accumulated prior to the 90 day time frame. In
these cases the condenser coil should be cleaned every 30 days.
If the build up on the coil consists of only light dust and debris the condenser coil can be cleaned with a
simple brush, heavier dust build up may require a vacuum or even compressed air to blow through the
condenser coil.
If heavy grease is present, there are de-greasing agents available for refrigeration use and specifically for
the condenser coils. The condenser coil may require a spray with the de-greasing agent and then blown
through with compressed air.
Failure to maintain a clean condenser coil can initially cause high temperatures and excessive run times,
continuous operation with dirty or clogged condenser coils can result in compressor failures. Neglecting the
condenser coil cleaning procedures will void any warranties associated with the compressor or cost to
replace the compressor.
Never use a high pressure water wash for this cleaning procedure as water can damage
the electrical components located near or at the condenser coil.
In order to maintain proper refrigeration performance, the condenser fins must be cleaned of dust, dirt and
grease regularly. It is recommended that this be done at least every three months. If conditions are such that
the condenser is totally blocked in three months, the frequency of cleaning should be increased. Clean the
condenser with a vacuum cleaner or stiff brush. If extremely dirty, a commercially available condenser
cleaner may be required.
Stainless Steel Care and Cleaning
To prevent discoloration of rust on stainless steel several important steps need to be taken. First, we need to
understand the properties of stainless steel. Stainless steel contains 70-80% iron which will rust. It also
contains 12-30% chromium which forms an invisible passive film over the steels surface which acts as a
shield against corrosion. As long as the protective layer is intact, the metal is still stainless. If the film is
broken or contaminated, outside elements can begin to breakdown the steel and begin to form rust of
discoloration. Proper cleaning of stainless steel requires soft cloths or plastic scouring pads.
NEVER USE STEEL PADS, WIRE BRUSHES OR SCRAPERS!
DANGER
DANGER
DANGER
Service and Installation Manual
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MAINTENANCE
Cleaning solutions need to be alkaline based or non-chloride cleaners. Any cleaner containing chlorides
will damage the protective film of the stainless steel. Chlorides are also commonly found in hard water, salts,
and household and industrial cleaners. If cleaners containing chlorides are used be sure to rinse repeatedly
and dry thoroughly upon completion.
Routine cleaning of stainless steel can be done with soap and water. Extreme stains or grease should be
cleaned with a non-abrasive cleaner and plastic scrub pad. It is always good to rub with the grain of the steel.
There are also stainless steel cleaners available which can restore and preserve the finish of the steels
protective layer.
Early signs of stainless steel breakdown can consist of small pits and cracks. If this has begun, clean
thoroughly and start to apply stainless steel cleaners in attempt to restore the passivity of the steel.
Never use an acid based cleaning solution！
！！
！Many food products have an acidic content
which can deteriorate the finish. Be sure to clean the stainless steel surfaces of ALL
food products. Common items include, tomatoes, peppers and other vegetables.
Gasket Maintenance
Gaskets require regular cleaning to prevent mold and mildew build up and also to keep the elasticity of
the gasket. Gasket cleaning can be done with the use of warm soapy water. Avoid full strength
cleaning products on gaskets as this can cause them to become brittle and prevent proper seals. Also,
never use sharp tools or knives to scrape or clean the gasket which could possibly tear the gasket and
rip the bellows.
Gaskets can easily be replaced and don’t require the use of tools or authorized service persons. The
gaskets are "Dart" style and can be pulled out of the grove in the door and new gaskets can be "pressed"
back into place.
Doors/Hinges
Over time and with heavy use doors the hinges may become loose. If it is noticed that the door is
beginning to sag, it may become necessary to tighten the screws that mount the hinge brackets to the
frame of the unit. If the doors are loose or sagging this can cause the hinge to pull out of the frame which
may damage both the doors and the door hinges. In some cases this can require qualified service
agents or maintenance personnel.
Drain Maintenance
Each unit has a drain located inside the unit which removes the condensation from the evaporator coil and
evaporates it at an external condensate evaporator pan. Each drain can become loose or disconnected from
moving or bumping the drain. If you notice excessive water accumulation on the inside of the unit, be sure
the drain tube is connected from the evaporator housing to the condensate evaporator drain pan. If water is
collected underneath the unit you may want to check the condensate evaporator drain tube to be sure it is
still located inside the drain pan. The leveling of the unit is important as the units are designed to drain
properly when on a level surface, if your floor is not level this can also cause drain problems. Be sure all
drain lines are free of obstructions typically food product is found blocking drain lines causing water to back
up and overflow the drain pans.
CAUTION
Service and Installation Manual
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MAINTENANCE
Swing Door Replacement and Adjustment
1. Open the bottom shroud and support the door weight. Loosen bottom hinge’s screws and remove the
door
2. Prepare new door. Insert door top pin into top hinge. Insert the bottom hinge onto the door’s bottom
hinge and secure to the frame
3. Allow the door to freely swing, make sure it swings close by itself with no restriction
4. Plug the unit in and make sure the lock is in the right location. Exercise the lock to ensure the cam
engagement
5. If not, adjust the door until proper lock cam engagement
Slide Door Replacement and Adjustment
1. Remove the hook of counterweight on the top of the door
2. Lift the door up until its bottom edge over the channel. Slide it out and down away from the cabinet.
3. Reverse the procedures to install new door
Remove the bottom shroud
1. Open the door/s.
2. Loosen and remove the top screws
3. Slide the shroud up and out of their keyhole shape slots
Light Bulb Replacement
1. Top display light bulb replacement: Loose the screws in the bottom of top shroud, swing the top shroud
up until it is hold by the top of the cabinet, now light bulb can be replaced;
2. Interior light bulb replacement: Open door and remove the cover. Twist and remove the bulb.
Service and Installation Manual
For warranty service, call 833-474-0367 12
CIRCUIT
DIAGRAM
MODEL: MGD-1DR-12-HC/MGD-1DR-16-HC/MGD-1DR-23-HC
MODEL: MGD-1DR-26-HC
Service and Installation Manual
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CIRCUIT
DIAGRAM
MODEL: MGD-2DR-36-HC/MGD-2DR-48-HC
MODEL: MGD-2DR-47-HC
Service and Installation Manual
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CIRCUIT DIAGRAM
MODEL: MGD-3DR-70-HC
MODEL: MGD-1DF-12-HC/MGD-1DF-16-HC/MGD-1DF-23-HC
Service and Installation Manual
For warranty service, call 833-474-0367 15
CIRCUIT DIAGRAM
MODEL: MGD-1DF-26-HC
MODEL: MGD-2DF-36-HC / MGD-2DF-48-HC
Service and Installation Manual
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CIRCUIT DIAGRAM
MODEL: MGD-2DF-48-DV-HC
MODEL: MGD-3DF-72-DV-HC
Service and Installation Manual
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WIRING DIAGRAM
MODEL:MGD-1DR-12-HC/MGD-1DR-16-HC/MGD-1DR-23-HC
Service and Installation Manual
For warranty service, call 833-474-0367 18
WIRING DIAGRAM
MODEL: MGD-1DR-26-HC
Service and Installation Manual
For warranty service, call 833-474-0367 19
WIRING DIAGRAM
MODEL: MGD-2DR-36-HC/MGD-2DR-48-HC
Service and Installation Manual
For warranty service, call 833-474-0367 20
WIRING DIAGRAM
MODEL:MGD-2DR-47-HC
Service and Installation Manual
For warranty service, call 833-474-0367 21
WIRING DIAGRAM
MODEL: MGD-3DR-70-HC
Service and Installation Manual
For warranty service, call 833-474-0367 22
WIRING DIAGRAM
MODEL:MGD-1DF-12-HC/MGD-1DF-16-HC/MGD-1DF-23-HC
Service and Installation Manual
For warranty service, call 833-474-0367 23
WIRING DIAGRAM
MODEL:MGD-1DF-26-HC
Service and Installation Manual
For warranty service, call 833-474-0367 24
WIRING DIAGRAM
MODEL: MGD-2DF-36-HC
Service and Installation Manual
For warranty service, call 833-474-0367 25
WIRING DIAGRAM
MODEL: MGD-2DF-48-DV-HC
Service and Installation Manual
For warranty service, call 833-474-0367 26
WIRING DIAGRAM
MODEL: MGD-3DF-72-DV-HC
Service and Installation Manual
For warranty service, call 833-474-0367 27
Distributed by: KaTom Restaurant Supply, Inc
305 Katom Drive
Kodak TN 37764
Website: www.katom.com
For Warranty Service Call: 833-474-0637
