OWNER’S MANUAL
Solid or Glass Door & Drawer Models
Compact Undercounter Refrigerators & Freezers
Compact Raised & Flat Cover Prep Tables
*For Legacy UHT, ULT, UPT, & UST Models
Hours Of Operation: Monday - Friday 7:30 a.m. - 4:30 p.m.
(CST)
4401 Blue Mound Road Fort Worth, Texas 76106 (USA)
Phone: 800.825.8220 | Service Fax: 817.740.6757 | E-mail: [email protected] | Website: traulsen.com
Quality Refrigeration
TABLE OF CONTENTS
I. THE SERIAL TAG
V. CARE & MAINTENANCE
a - Cleaning the Exterior Page 10
b - Cleaning the Interior Page 10
c - Cleaning the Condenser Coil Page 10
d - Condensate Removal System Care Page 10
VI. OTHER
a - Service Information Page 11
b - Ventilated Area Page 11
c - Cabling Page 11
d - Detection of Flammable Refrigerants Page 11
e - Removal and Evacuation Page 11
f - Spare Parts Page 12
g - Warranty Registration Page 12
VII. MISC. OPERATIONS
a - Rehinging the Door Page 12
b - Adjusting the Door Page 12
c - Door & Drawer Gasket Replacement Page 12
d - Preparing for Extended Shutdown Page 12
VIII. TROUBLE SHOOTING GUIDE Page 13
X. NOTES Page 14
I. THE SERIAL TAG
a - Reading the Serial Tag Page 1
II. RECEIPT INSPECTION Page 2
III. INSTALLATION
a - Location Page 2
b - Packaging Page 2
c - Installing/Adjusting Legs or Casters Page 2
d - Shelf Clips for Door Models Page 3
e - Cord & Plug Page 3
f - Power Supply Page 3
g - Clearance Page 3
h - Cutting Board Assembly: UPT/UST Page 3
i - Installing the Stainless Steel Top: UHT Page 3
IV. OPERATION & CONTROL
a - Prestart Checks Page 4
b - Information Menu Page 4
c - Adjusting Cabinet Setpoint Page 4
d - Initiating a Defrost Page 4
e - Conguration Parameters Page 5
f - Technical Data Page 5
g - Components and Wiring Diagram Page 9
h - Refrigerating Product Page 10
i - Pans & Divider Bars - Top Rail Page 10
j - Pans & Divider Bars - Drawers Page 10
I. a - Reading the Serial Tag
•Serial = The permanent ID# of your Traulsen unit
•Model = The model # of your Traulsen unit
•Volts = Voltage
•Hz = Cycle
•PH = Phase
•Total Current = Maximum amp draw
•Minimum Circuit = Minimum circuit ampacity
•Lights = Light wattage
•Heaters = Heater amperage (Hot Food units only)
•Refrigerant = Refrigerant type used & refrigerant charge
•Design Pressure = High & low side operating pressures
•Agency Labels = Designates agency listings
The serial tag is a permanently axed label on which is
recorded vital electrical and refrigeration data about your
Traulsen product, as well as the model and serial number.
This tag is located in the right interior compartment on all
standard models.
LEGACY COMPACTS
Page 1
ITW Food Equipment Group, LLC
North American Refrigeration
4401 Blue Mound Rd.
Ft. Worth, TX 76106
800-825-8220
MODEL:
MODELO:
MODELE:
UHT27-L
SERIAL NUMBER:
22D03839
SCAN FOR SERVICE INFO
REFRIGERANT / REFRIGERANTE / RÉFRIGÉRANT
SYS1 (REFM):
R-290
3.00 OZ
85.04 g
85,04 g
Hi Press. (PRESH):
400.00 psi
2,757.90 kPa
2.757,90 kPa
Lo Press. (PRESL):
200.00 psi
1,378.95 kPa
1.378,95 kPa
SYS2 (REFA):
NA
Hi Press. (PRESH):
Lo Press. (PRESL):
Input Power (ELIN) - FOR INDOOR USE ONLY
Voltage
Hertz
Phase
Total Amps
115
60
1
7.20
Device/Part Number:
UHT27-L
Device/Part Notes:
COMPONENTS / COMPOSANTS / COMPONENTES
1
2
MAX OVER CURRENT PROTECTION (A):
COMP AMPS:
MIN CIRCUIT IN AMPS:
COND FAN AMPS:
DOME LIGHT WATTS:
EVAP FAN AMPS:
DISPLAY LIGHT WATTS:
CONTROL AMPS:
DOOR HEATER WATTS:
DEF HEATER WATTS:
B/TMCE HTR WATTS:
370-60297-00 REV. D 01/15/2024
III. INSTALLATION (cont’d)
NOTE: Traulsen does not recommend laying the unit down
on its front, side or back. However, if you must, please be
certain to allow the unit to remain in an upright position
afterwards for 24 hours before plugging it in so that the
compressor oils and refrigerant may settle.
III. c - Installing/Adjusting Legs or Casters
6” high legs are supplied standard for all Traulsen compact
undercounter and prep table units. These are shipped from
the factory inside a cardboard box which is secured inside the
cabinet. Casters, in lieu of legs, are supplied as an optional
accessory for all compact undercounter and prep table models.
The casters are “stem” type, and do not require the use of any
bolts. When ordered casters are shipped in a separate box.
WARNING: The cabinet must be blocked and stable before
installing legs or casters.
Raise up and block the cabinet a minimum of 7” from the oor
and thread the legs into the threaded holes on the bottom of the
cabinet’s.
Thread optional casters into the threaded holes on the bottom
of the cabinet in the same way. Casters with brakes should be
installed at the front.
Level the cabinet using a level or pan of water in the bottom
of the cabinet. On units with legs, turn the adjustable feet in or
out to level the cabinet side-to-side and front-to-back. Units with
casters should be placed on level oors.
NOTE: Traulsen units are not designed to be moved while
on legs. If the unit requires moving, a pallet jack or forklift
should be used to prevent damage.
II. RECEIPT INSPECTION
All Traulsen products are factory tested for performance
and are free from defects when shipped. The utmost
care has been taken in crating this product to protect
against damage in transit.
You should carefully inspect your unit for damage during
delivery. If damage is detected, you should save all the
crating materials and make note on the carrier’s Bill Of
Lading describing the damage. A freight claim should
be led immediately. If damage is subsequently noted
during or immediately after installation, contact our
customer care team to le a freight claim. There is a
fteen (15) day limit to le freight damage with the carrier.
Under no condition may a damaged unit be returned
to Traulsen without rst obtaining written permission
(return authorization). You may contact Hobart/Traulsen
customer care at 800-333-7447 to request a return or
le a claim.
System Using R-290 Refrigerant (Propane)
Traulsen has selected propane as the refrigerant for
many of their products.
In addition to its low global warming potential and impact
on the environment, propane is an ideal refrigerant. It is
a ammable refrigerant, however, which is why you will
see a “ammable refrigerant” sticker applicable products.
Traulsen products using propane as the refrigerant are
UL approved, and are safe to use in accordance with
this Owner’s Manual and general industry practices for
commercial cooking environments.
Please check with local codes or regulations for any
restrictions to products using hydrocarbon refrigerants.
III. INSTALLATION
III. a - Location
Select a proper location for your unit, away from extreme
heat or cold. Allow enough clearance between the unit
and the side wall in order to make use of the stay-open
feature at 120° (self-closing feature operates up to 90°).
The door(s) must be able to open a minimum of 90° in
order to make use of the maximum clear door width.
NOTE: Do not install the cabinet without legs,
casters or front ventilated utility base.
III. b - Packaging
All Traulsen units are shipped from the factory bolted
to a sturdy wooden pallet and packaged in a durable
cardboard container. The carton is attached to the
wooden skid with the use of large staples. The should
rst be removed to avoid scratching the unit when lifting
o the crate.
To remove the wooden pallet, rst if at all possible, we
suggest that the cabinet remain bolted to the pallet
during all transportation to the point of nal installation.
The bolts can be removed with a 5/8” socket wrench by
tipping or otherwise raising the unit to allow access to
them. Avoid laying the unit on its front, side or back for
removal of the pallet.
LEGACY COMPACTS
Page 2
screws to secure in place. The cutting board is eld
reversible, reverse process to reverse cutting board.
NOTE: The lid(s)/cover(s) are installed at the factory.
No assembly required.
III. i - Installing the Stainless Steel Top: UHT
All 27”, 32”, 48”, and 60” wide compact undercounter
models can be supplied with an optional stainless steel
top. This must be installed on-site, to do so please follow
the directions below.
1. Peel-o backing and install foam tape (provided)
around entire perimeter of the top of the unit.
2. A ange is assembled underneath at the front of the
counter top. This ange has two screw holes. Screw the
two 1/4-20x5/8” screws (provided through the holes in
this front ange into the threaded holes in the front of the
top edge of the unit.
3. Using the ve 10-16x1/2” screws provided, screw the
bottom of the rear cover plate to the upper rear of the
cabinet.
4. If the optional polyethylene cutting board top is
provided, there are four threaded pins which screw into
the four threaded holes in the work top. The four holes in
the polyethylene cutting board top t around the heads
of the four pins.
III. d - Shelf Clips for Door Models
Shelves and shelf clips are shipped with the unit. For each shelf,
insert four (4) shelf clips into the pilaster slots at the same height.
The shelf clips have a small projection on top which holds the shelf
position and prevents it from slipping forward. After installing shelf
clips on pilasters, place shelves on clips.
III. e - Cord & Plug
All UHT, ULT, UPT & UST models are supplied with a cord and plug
attached. It is shipped coiled at the bottom of the cabinet, secured
by a nylon strip. For your safety and protection, all units supplied
with a cord and plug include a special three-prong grounding plug
on the service cord. Select only a dedicated electrical outlet with
grounding plug for power source.
NOTE: Do not under any circumstances, cut or remove the
round grounding prong from the plug, or use an extension
cord.
III. f - Power Supply
The supply voltage should be checked prior to the connection to
be certain that proper voltage for the cabinet wiring is available
(refer to the serial tag to determine correct unit voltage, see page
1). Make connections in accordance with local electrical codes.
Use qualied electricians.
Use of a separate, dedicated circuit is required. Size wiring
to handle indicated load and provide necessary over current
protector in circuit (see amperage requirements on the unit’s
serial tag).
III. g - Clearance
It is important for the proper operation and longevity of your
Traulsen unit that it have adequate provisions underneath for air
supply to the compressor. There are no clearance requirements
for the sides, rear or top.
NOTE: Do not install the cabinet without legs, casters or a
front ventilated utility base.
III. h - Cutting Board Assembly: UPT/UST
On sandwich prep tables, the cutting board may require assembly
at the site.
Place cutting board on cabinet, properly align & install three (3)
III. INSTALLATION (cont’d)
LEGACY COMPACTS
Page 3
III. INSTALLATION (cont’d)
IV. c - Adjusting Cabinet Setpoint
Setpoint display and modication:
• Press button for at least a half second to display the
setpoint value.
• While keeping the button pressed, use button
or to set the desired value (adjustment is within
the minimum SPL and the maximum SPH limit).
• When button is released, the new value is stored.
IV. d - Initiating a Defrost
Automatic defrost:
Defrost starts automatically as soon as the time set with parameter
DFT has elapsed.
• Timed defrost: With DFM = TIM defrosts take place at regular
intervals when the timer reaches the value of DFT. For
example, with DFM = TIM and DFT = 36, a defrost will take
place every 6 hours.
• Optimized defrost: With DFM = FRO the timer is only
increased when the conditions occur for frost to form on the
evaporator, until the time set with parameter DFT is matched.
If the evaporator works at 0°F, defrost frequency depends on
the thermal load and climatic conditions. With setpoints much
lower than 0°F, defrost frequency mainly depends on the milk
cooler operating time.
• Defrost time count backup: At the power-up, if DFB = YES,
the defrost timer resumes the time count from where it
was left o before the power interruption. Vice versa, with
DFB = NO, the time count re-starts from 0. In stand-by, the
accumulated time count is frozen.
Manual or remote defrost start:
It’s possible to manually start a defrost, by pressing button
for 2 seconds.
Defrost type. Once defrost has started, Compressor and
Defrost outputs are controlled according to parameter DTY. If
FID = YES, the evaporator fans are active during defrost.
Defrost termination. The actual defrost duration is inuenced
by a series of parameters.
• Time termination: T2 = NO and T3 dierent from 2EU: the
evaporator temperature is not monitored and defrost will last
as long as time DTO.
• Temperature monitoring of one evaporator: T2 = YES and T3
dierent from 2EU. In this case, if the sensor T2 measures
the temperature DLI before the time DTO elapses, defrost
will be terminated in advance.
IV. a - Prestart Checks
The compressor must oat freely before connecting to
electrical power. The compressor motor is provided with
rubber vibration isolator mounts (no springs). No bolts
need to be loosened. Check all exposed refrigeration lines
to make sure they are not dented or kinked. Check for
tubing shifts due to shipping that would cause operating
noise, wear, or leaks. Check that condenser fan rotates
freely.
The refrigeration system should be checked for proper
operation before product is stored in the cabinet.
Your new compact is equipped with a digital control,
which precisely regulates operation. It is supplied from
the factory completely ready for use and is located next
to the refrigeration system underneath the cover.
IV. b - Information Menu
The information available in this menu is:
* displayed only if enabled (see Conguration Parameters)
** displayed only if ACC > 0
Access to menu and information displayed:
• Press and immediately release button .
• With button or select the data to be displayed.
• Press button to display value.
• To exit from the menu, press button or wait for 10
seconds.
Initiate Stand-By:
Keeping the button
pressed for 3 seconds allows the
controller to be put on a standby or output control to be
resumed (with SB=YES only).
Locking the Keypad:
The keypad lock avoids undesired, potentially dangerous
operations, which might be attempted when the controller
is operating in a public place. In the INFO menu, set
parameter LOC = YES to inhibit all functions of the
buttons. To resume normal operation of keypad, adjust
setting so that LOC = NO.
IV. OPERATION & CONTROL
LEGACY COMPACTS
Page 4
IV. OPERATION & CONTROL (cont’d)
IV. d - Initiating a Defrost (cont’d)
Resuming thermostatic cycle:
When defrost is over, if DRN is greater than 0, all outputs will
remain o for DRN minutes, in order for the ice to melt completely
and the resulting water to drain. Moreover, if probe T2 is active
(T2 = YES), the fans will re-start when the evaporator gets to a
temperature lower than FDD; Vice versa, if probe T2 is not active
(T2 = NO) or after defrost has come to an end, such condition
does not occur by end of the time FTO, after FTO minutes have
elapsed the fans will be switched on anyway.
Caution: if DFM = NON or C-H = HEA all defrost functions are
inhibited; if DFT = 0, automatic defrost functions are excluded.
IV. e - Conguration Parameters
Parameter Conguration:
• To get access to the parameter conguration menu, press
button and for 5 seconds.
• With button or select the parameter to be modied.
• Press button to display the value.
• By keeping button pressed, use button or to set
the desired value.
• When button is released, the newly programmed value is
stored and the following parameter is displayed.
• To exit from the setup, press button or wait for 30
seconds.
IV. f - Technical Data
Power supply
TRL-002....W 100-240Vac ±10%, 50/60Hz, 3W
Relay output max loads (240Vac)
TRL-002..S/T..-. TRL-002..Q/R..-.
Compressor 16A resistive
12 FLA 48 RLA
12A resistive
12 FLA 48 RLA
Evap. Fan 16A resistive
4 FLA 12 RLA
8A resistive
4 FLA 12 RLA
Defrost 16A resistive
4 FLA 12 RLA
16A resistive
4 FLA 12 RLA
Auxiliary loads 1 7A resistive 7A resistive
Auxiliary loads 2 7A resistive 7A resistive
Measurement Range
<0.5 within the measurement range
Operating Conditions
-10... +50°C; 15%...80% r.H.
CE (Approvals and Reference Norms)
EN60730-1; EN60730-2-9; EN55022 (Class B); EN50082-1
LEGACY COMPACTS
Page 5
IV. OPERATION & CONTROL (cont’d)
IV. OPERATION & CONTROL (cont’d)
PAR RANGE DESCRIPTION
SPL -58..SPH Minimum limit for SP setting.
SPH SPL...180° Maximum limit for SP setting.
SP SPL... SPH Setpoint (value to be maintained in the room).
C-H REF; HEA Refrigerating (REF) or Heating (HEA) control mode.
HY0 1...10° Thermostat OFF -> ON dierential.
HY1 0...10° Thermostat ON -> OFF dierential.
CRT 0...30min Compressor rest time. The output is switched on again after CRT minutes have elapsed since
the previous switchover. We recommend to set CRT=03 with HY0<2.0°.
CT1 0...30min Compressor/Heater output run when probe T1 is faulty. With CT1=0 the output will always remain
OFF.
CT2 0...30min Compressor/Heater output stop when probe T1 is faulty. With CT2=0 and CT1>0 the output will
always be ON.
Example: CT1=4, CT2= 6: In case of probe T1 failure, the compressor will cycle 4 minutes ON
and 6 minutes OFF.
DFM NON;
TIM;
FRO
CRN
Defrost start mode
NON : defrost function is disabled (the following parameter will be FCM).
TIM : regular time defrost.
FRO : the defrost time count is only increased when the conditions occur for frost to form on the
evaporator (optimized time increase).
CRN : defrost is based o of compressor run time (time is based o of DAT).
DFT 0...250 Time interval among defrosts in x10 minutes. When this time has elapsed since the last defrost, a new
defrost cycle is started. Each number is multiplied by 10 minutes. 0-250 indicates 0-2500 minutes.
DAT 0…100
hours
Frost accumulation timeout.
DFB NO/YES Defrost timer backup. With DFB=YES, after a power interruption, the timer resumes the count from
where it was left o with ±30 min. approximation. With DFB=NO, after a power interruption, the
defrost timer will re-start to count from zero.
DLI -58...180° Defrost end temperature.
DMD 0…30min Minimum defrost duration.
DTO 1...120min Maximum defrost duration.
DTY OFF; ELE;
GAS
Defrost type
OFF: o cycle defrost (Compressor and Heater OFF). ELE: electric defrost (Compressor OFF and
Heater ON). GAS: hot gas defrost
(Compressor and Heater ON).
DSO OFF;
LO;
HI
Defrost start optimization
OFF : no optimization.
LO : defrost waits until the compressor cut-out.
HI : defrost waits until the compressor cut-in.
SOD 0...30 min Start optimization delay.
DPD 0...240sec Evaporator pump down. At the beginning of defrost, outputs (determined by DTY) are OFF for
DPD seconds.
DRN 0...30min Pause after defrost (evaporator drain down time).
DDM RT;
LT;
SP;
DEF
Defrost display mode. During defrost the display will show:
RT: the real temperature;
LT : the last temperature before defrost;
SP : the current setpoint value;
DEF : “dEF”.
DDY 0...60min Display delay. The display shows the information selected with parameter DDM during defrost
and for DDY minutes after defrost termination.
LEGACY COMPACTS
Page 6
IV. OPERATION & CONTROL (cont’d)
PAR RANGE DESCRIPTION
FID NO/YES Fans active during defrost.
FDD -58...180° Evaporator fan re-start temperature after defrost.
FTO 0...120min Maximum evaporator fan stop after defrost.
FCM NON;
TMP;
TIM
Fan mode during thermostatic control.
NON : The fans remain ON all the time;
TMP : Temperature-based control. The fans are ON when the compressor is ON. When the com-
pressor is turned OFF, the fans remain ON as long as the temperature dierence Te-Ta is greater
than FDT. The fans are turned ON again with FDH dierential. (Te = Evaporator temperature, Ta
= Air temperature);
TIM : Timed-based control. The fans are ON when the compressor is ON. When the compressor
is OFF, the fans switch ON and OFF according to parameters FT1, FT2,FT3
FDT -12...0° Evaporator-Air temperature dierence for the fans to turn OFF after the compressor has stopped.
FDH 1...12° Temperature dierential for fan re-start.
Example: FDT = -1, FDH=3. In this case, after the compressor has stopped, the fans are OFF when
Te > Ta - 1 (FDT), whereas the fans are ON when Te < Ta - 4 (FDT-FDH).
FT1 0...180sec Fan stop delay after compressor/heater stop. See Fig. 2
FT2 0...180 Timed fan stop in x10 seconds. With FT2=0 the fans remain on all the time.
FT3 0...180 Timed fan run in x10 seconds. With FT3=0, and FT2 > 0, the fans remain o all the time.
ATM NON;
ABS;
REL
Alarm threshold management.
NON : all temperature alarms are inhibited (the following parameter will be ACC).
ABS : the values programmed in ALA and AHA represent the real alarm thresholds.
REL : the alarm threshold is obtained by the sum of setpoint, thermostat dierential and ALR/AHR.
ALA -58... 180° Low temperature alarm threshold.
AHA -58... 180° High temperature alarm threshold.
ALR -12... 0° Low temperature alarm dierential. With ALR=0 the low temperature alarm is excluded.
AHR 0... 12° High temperature alarm dierential. With AHR=0 the high temperature alarm is excluded.
ATI T1; T2; T3 Probe used for temperature alarm detection.
ATD 0... 120 min Delay before alarm temperature warning.
ACC 0...52 weeks Condenser periodic cleaning. When the compressor operation time, expressed in weeks, matches
the ACC value programmed, “CL” ashes in the display. With ACC=0 the condenser cleaning warn-
ing is disabled and CND disappears from Info Menu.
IISM NON;
MAN;
ECO;
DI
Switchover mode to second parameter set
NON : inhibition to use the second parameter group (the following parameter will be SB).
MAN : button switches the two parameter groups over.
ECO : automatic switchover to the second parameter group, when ECO conditions are detected.
DI : switchover to the second parameter group when DIx input is on.
IISL -58... IISH Minimum limit for IISP setting.
IISH IISL... 180° Maximum limit for IISP setting.
IISP IISL... IISH Setpoint in mode 2.
IIH0 1... 10° Thermostat OFF->ON dierential in mode 2.
IIH1 0... 10° Thermostat ON->OFF dierential in mode 2.
IIDF 0...250 Time interval among defrosts in mode 2 in x10 minutes.
IIFC NON; TMP;
TIM
Fan control in mode 2. See FCM.
ECS 1...5 Controller sensitivity for the automatic switchover from Group I to Group II (1=minimum, 5=maximum).
EPT 0...240 min Eco pull-down time. Only with IISM=ECO. Group I parameters are used in regulation for at least
EPT minutes. See Fig.3
SB NO/YES Stand-by button enabling.
LEGACY COMPACTS
Page 7
IV. OPERATION & CONTROL (cont’d)
LEGACY COMPACTS
Page 8
PAR RANGE DESCRIPTION
DSM NON;
ALR;
STP
Door switch input mode:
NON : door switch inhibited
ALR : when DIx=DOR and the digital input is on, an alarm is generated after ADO minutes
STP : when DIx=DOR and the digital input is on, in addition to the alarm, the fans are immedi-
ately stopped and the compressor is stopped after CSD minutes.
DAD 0...30 min Delay before door open alarm warning.
CSD 0...30 min Compressor/heater stop delay after door has been opened.
D1O NON;
DOR;
ALR;
IISM;
RDS
DI1 digital input operation
NON : digital input 1 not active.
DOR : door input.
ALR : when the input is on, an alarm is generated (if AHM=STP, the compressor is stopped and
the defrosts are suspended).
IISM : when the input is on, the controller will use group 2 parameters.
RDS : when the input is on, a defrost is started (remote control).
D1A OPN;
CLS.
DI1 digital input activation.
OPN : on open
CLS : on close
D2O See D1O DI2 digital input operation. See D1O.
D2A OPN;
CLS.
DI2 digital input activation.
OPN : on open
CLS : on close
PSL -58…158 Minimum setpoint adjusted via potentiometer.
PSR 0…15 Range of setpoint adjusted via potentiometer.
LSM NON;
MAN;
ECO;
DI1;
DI2;
DI3.
Light control mode
NON : light output not controlled.
MAN : light output controlled through button (if OAx=LGT).
ECO : lights activated/deactivated following the ECO state.
DIx : lights activated/deactivated following the DIx state.
LSA OPN;
CLS
Light activation (only with LSM=ECO or LSM=DIx).
OPN : lights on with DIx open or ECO mode deactivated.
CLS : lights on with DIx closed or ECO mode activated.
OT1 0…600 sec Activation time of OA1
OT2 0…600 sec Pause between OA1 activation
OA1 NON;
LGT;
0-1;
2CU;
2EU;
ALO;
ALC
AUX 1 output operation
NON : output disabled (always o).
LGT : output enabled for light control.
0-1 : the relay contacts follow the on/standby state of controller.
2CU : output programmed for the control of an auxiliary compressor.
2EU : output enabled for the control of the electrical defrost of a second evaporator.
ALO : contacts open when an alarm condition occurs.
ALC : contacts make when an alarm condition occurs.
2CD 0...120 sec Auxiliary compressor start delay. If OAx=2CU the auxiliary output is switched on with a delay of
2CD seconds after the main compressor has cut-in. Both compressors are turned o at the same
time.
OS1 -12.5..12.5° Probe T1 oset.
T2 NO/YES Probe T2 enabling (evaporator).
OS2 -12.5..12.5° Probe T2 oset.
T3 NON;
DSP;
CND;
2EU
Auxiliary probe T3 operation
NON : probe T3 not tted.
DSP : temperature T3 to be displayed.
CND : condenser temperature measurement.
2EU : second evaporator temperature measurement.
IV. OPERATION & CONTROL (cont’d)
LEGACY COMPACTS
Page 9
PAR RANGE DESCRIPTION
OS3 -12.5..12.5° Probe 3 oset.
AHM NON;
ALR;
STP;
Operation in case of high condenser alarm
NON : high condenser alarm inhibited.
ALR : in case of alarm, “HC” ashes in the display and the buzzer is switched on.
STP : in addition to the alarm symbols displayed, the compressor is stopped and defrosts are
suspended.
AHT -50...110° Condensation temperature alarm (referred to T3 probe).
TLD 1...30 min Delay for minimum temperature (TLO) and maximum temperature (THI) logging.
TDS T1;
1-2;
T3
Selects the temperature probe to be displayed.
T1 : probe T1
1-2 : the AVG-weighted average between T1 and T2
T3 : probe T3
AVG 0...100% The relative weight of T2 on T1 (if TDS = 1-2)
Example 1: T1 = -5°, T2 = -20°, AVG = 100%. The displayed temperature will be -20° (T1 has no
eect)
Example 2: T1 = -5°, T2 = -20°, AVG = 60%. The displayed temperature will be -14.
SCL 1°C;
2°C;
°F
Readout scale.
1°C : measuring range -50…110°C (0.1°C resolution within -9.9 ÷ 19.9°C interval, 1°C outside)
2°C : measuring range -50 … 110°C
°F : measuring range -55 … 180°F
SIM 0...100 Display slowdown.
ADR 1...255 TRL-002 address for PC communication.
NPR 0…1 Setup programmed.
STT 0…255 Setup traceability.
IV. g - Components and Wiring Diagram Control Wiring Diagram:
Indications:
Thermostat output
Fan output
Defrost output
Activation of 2
nd
parameter set
Alarm
Manual activation / Increase button
Exit / Stand-by button
IV. h - Refrigerating Product
A thermometer is provided inside all UHT, ULT, UPT &
UST models. Allow the cabinet to reach normal operating
temperature before loading.
UHT, ULT, UPT & UST Series will satisfactorily refrigerate
an assorted load of food items. Allow space between
articles to permit free air circulation. Do not overload
at any one time with warm food products and expect
immediate results. A certain amount of time is required
to remove heat from items before operating temperatures
can be attained. The system is designed for storage of
refrigerated or frozen product.
Opening the door or drawer will increase the temperature
in the cabinet and will require a certain amount of time
to recover. Also after peak service periods or after warm
product is loaded the refrigerator will require a certain
amount of time for the temperature to return to the normal
operating range.
IV. i - Pans & Divider Bars - Top Rail
Sandwich prep table models are provided with 1/6 size
plastic pans and metal divider bars. When (18) 1/6
size pans are ordered, (4) standard and (1) wide pan
divider/supports are provided to achieve appropriate
pan separation. When (24) 1/6 size pans are ordered,
(6) standard and (1) wide pan divider/supports are
provided to achieve appropriate pan separation. All other
arrangements use all standard-width pan divider bars.
IV. j - Pans & Divider Bars - Drawers
Drawer models are provided with metal divider bars
standard. All 27” wide models are supplied with (2) bars,
32” wide models are supplied with (2) narrow bars and
(1) wide bar, and 60” wide models are supplied with (2)
bars and (1) hook divider bar, per drawer.
LEGACY COMPACTS
Page 10
IV. OPERATION & CONTROL (cont’d) V. CARE AND MAINTENANCE
WARNING: DISCONNECT ELECTRICAL POWER
SUPPLY BEFORE CLEANING ANY PARTS OF THE UNIT.
V. a - Cleaning the Exterior
Exterior stainless steel should be cleaned with warm water, mild
soap and a soft cloth. Apply with a dampened cloth and wipe in
the direction of the metal grain.
Avoid the use of strong detergents and gritty, abrasive cleaners
as they may tend to mar and scratch the surface. DO NOT use
cleaners containing chlorine, this may promote corrosion of the
stainless steel.
V. b - Cleaning the Interior
For cleaning the interior, the use of baking soda as described in
section V. a is recommended. Use on breaker strips as well as
door and drawer gaskets.
All door models’ interior ttings are removable without tools to
facilitate cleaning.
Depending on the level of cleaning, drawer models’ interior ttings
may require a tool to facilitate cleaning. The drawer frame may be
removed without tools by simply by pulling out and upward. For
deeper cleaning the back panel will require a Phillips screwdriver
to be removed.
For additional deeper cleaning you may also remove the air duct
by removing the thumb screws and rotating them in counter-
clockwise motion.
V. c - Cleaning the Condenser Coil
Check the condenser coil periodically. The operating environment
will aect the required frequency of cleaning. Air must be able to
freely circulate through the condenser. This surface must be kept
free of dirt and grease for proper system operation. Remove the
lower rear panel on the rear of the equipment cabinet. Carefully
clean dirt and lint from the condenser coil using a vacuum cleaner
or soft brush; DO NOT use a wire brush. Replace the lower rear
panel. Reconnect electrical supply.
V. d - Condensate Removal System Care
The evaporator coil, condensate loop and condensate pan, when
needed, can all be ushed with fresh water by a qualied service
technician. This should be part of any routine maintenance
program and can prolong the life of the equipment.
Condensate removal is provided by evaporation at the lower
rear portion of the equipment cabinet and does not need a drain.
Periodic cleaning of the condensate removal box, remove the
lower panel at the rear of the equipment cabinet. Clean the
condensate removal box by wiping it out with a clean damp cloth,
using care with the condensate loop inside. Replace the lower
rear panel. Reconnect electrical power supply.
LEGACY COMPACTS
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VI. OTHER
VI. a - Service Information
Before calling for service, please check the following:
Is the electrical cord plugged in?
Is the fuse OK or circuit breaker on?
Is the power switch “ON”?
If after checking the above items and the unit is still not operating
properly, please contact an authorized Traulsen service agent.
You may obtain the name of a service agent from the Service tab
of our website: www.traulsen.com.
If service is not satisfactory, please contact our in-house service
department at: Traulsen
4401 Blue Mound Road Fort Worth, TX 76106
(800) 825-8220
Traulsen reserves the right to change specications or discontinue
models without notice.
This appliance is marked with the ISO 7010-W021
warning label to indicate the presence of FLAMMABLE
REFRIGERANTS. Prior to beginning work on systems
containing FLAMMABLE REFRIGERANTS, safety checks are
necessary to ensure that the risk of ignition is minimized.
VI. b - Ventilated Area
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.
VI. c - Cabling
Check that cabling will not be subject to wear, corrosion, exces-
sive pressure, vibration, sharp edges, or any other adverse
environmental eects. The check shall also take into account
the eects of aging or continual vibration from sources such as
compressors or fans.
VI. d - Detection of Flammable Refrigerants
Under no circumstances shall potential sources of ignition be
used in the searching for or detection of refrigerant leaks. A
halide torch (or any other detector using a naked ame) 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 recalibrating. (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.
VI. OTHER (cont’d)
VI. d - Detection of Flammable Refrigerants
(cont’d)
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 conrmed.
Leak detection uids 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 pipe-work.
NOTE: Examples of leak detection uids are
- bubble method
- uorescent method agents
If a leak is suspected, all naked ames shall be
removed/extinguished.
If a leakage of refrigerant is found which requires
brazing, all of the refrigerant shall be recovered from
the system, or isolated (by means of shut o valves) in
a part of the system remote from the leak. Removal of
refrigerant shall be according to Section VI. e below.
VI. e - Removal and Evacuation
When breaking into the refrigerant circuit to make
repairs- or for any other purpose - conventional
procedures shall be used. However, for ammable
refrigerants it is important that best practice be
followed, since ammability 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
d) purge with inert gas;
e) open the circuit by cutting or brazing.
The refrigerant charge shall be recovered into the
correct recovery cylinders if venting is not allowed by
local and national codes. For appliances containing
ammable refrigerants, the system shall be purged
with oxygen-free nitrogen to render the appliance safe
for ammable 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 ammable refrigerants,
purging shall be achieved by breaking the vacuum in
the system with oxygen-free nitrogen and continuing to
ll until the working pressure is achieved, then venting
to atmosphere, and nally pulling down to a vacuum.
This process shall be repeated until no refrigerant is
within the system (optional for A2L). When the nal
oxygen-free nitrogen charge 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.
LEGACY COMPACTS
Page 12
VI. OTHER (cont’d)
VI. f - Spare Parts
Spare or replacement parts may be obtained through a
parts supplier or one of our authorized service agents (see
page 17-18 for parts listing). A list of authorized service
agents is posted on our company’s ocial website Service
tab at www.traulsen.com.
VI. g - Warranty Registration
The warranty for your new Traulsen unit may be registered
with us by completing warranty information online, via our
website www.traulsen.com click on Service Tab or calling
us direct at 800-825-8220.
VII. MISC. OPERATIONS
VII. a - Rehinging the Door
The door(s) on all UHT, ULT, UPT & UST models can
be easily rehinged in the eld. To begin, open the door
to its maximum position. Support the non-hinged end of
the door so minimum movement occurs when the bolts
from the lower hinge plate are removed. Remove the
lower hinge plate and then the door from the top hinge
bracket. The hinge plate pin and plastic bushing will
remain in the top hinge plate.
Lay the door down on a padded at surface while
being careful not to allow the lower hinge plate and
mechanism stem to slide out the bottom of the door.
NOTE: The lower hinge plate is under spring tension.
Grasp the lower hinge plate while keeping a rm grip
on the plate, carefully slide it out the bottom of the door
just far enough to allow the plate to rotate to a full 360°.
Unwind the tension of the spring by carefully allowing
the hinge plate to rotate a full 360° several times.
Slide the hinge plate and hinge mechanism stem out
the bottom of the door.
VII. MISC. OPERATIONS (cont’d)
NOTE: Remove the brass bushing from the bottom of the door
only if spring replacement is necessary. Both the spring and
bushing will need to be new parts.
NOTE: When installing, make sure the lower hinge plate and
hinge mechanism stem are rotated no more than six (6) full
turns while applying tension to the spring.
To reinstall the door, position the lower hinge plate into the
position of being open 90° to the cabinet. Place the top hinge
plate in the hole in the top of the door and support the other
end of the door for minimal movement. Start the bolts in the
lower hinge plate and tighten the bolts enough to hold the door
in place. Remove the block from under the end of the door.
Adjust the door.
VII. b - Adjusting the Door
Occasionally the door (s) may require alignment adjustment.
To do so, rst open the door and loosen the hinge plate screws
enough to move the hinges if desired, but the door is held in
place. Center the door in the opening. Next, level the top hinge
plate and tighten the screws. Finally, level the lower hinge plate
and tighten the screws.
VII. c - Door & Drawer Gasket Replacement
Remove the old gasket by pulling it out from the gasket
retainer. Next, install the four corners of the new gasket by
pushing straight in on the gasket until it is hooked behind the
gasket retainer. Be careful not to stretch the gasket as it will not
return to its original length. Starting at the center of one edge,
push the gasket straight in until it is hooked behind the gasket
retainer. Proceeding from this point out to the corners, continue
pushing the gasket straight into the gasket retainer. Proceed
doing the same to each of the remaining edges until the gasket
is completely installed.
VII. d - Preparing for Extended Shutdown
If the refrigerator is not to be used for an extended period
of time, disconnect the electrical power supply and open
the doors. As soon as the cabinet has warned up to room
temperature, wipe out the interior. Leave the doors open and
check again to make sure that no moisture has collected on any
parts. To restart refrigerator, follow instructions under sections
III. INSTALLATION and IV. OPERATION AND CONTROL.
Loosen Hinge Plates
VIII. TROUBLE SHOOTING GUIDE
PROBLEM REMEDY
1. Condensing unit fails to start.
a. Check if cord has been disconnected.
b. Check control temperature setting.
2. Condensing unit operates for
prolonged periods or continuously.
a. Are doors closing properly?
b. Dirty condenser lter. Clean properly.
c. Evaporator coil iced. Needs to defrost.
3. Food compartment is too warm.
a. Check door(s) & gasket(s) for proper seal.
b. Check if a large quantity of warm food was recently added or the door
or drawer was kept open for a long period of time. Allow adequate time
for the cabinet to recover its normal operating temperature.
c. Control setting too high, re-adjust per instructions.
d. Check that condensing coil is clean.
4. Food compartment is too cold.
a. Check if large quantity of very cold or frozen food has recently been
added. Allow adequate time for the cabinet to recover its normal
operating temperature.
b. Adjust the control to a warmer setting.
5.Condensation on the exterior surface.
a. Check door(s) or drawer(s) alignment and gaskets for proper seal.
b. Condensation on the exterior surface of the unit is perfectly normal
during periods of high humidity.
6. Compressor hums but does not start. a. Call for service.
7. No power to unit.
a. Check if cord & plug has been disconnected.
b. Check power supply breaker.
c. Check ON/OFF switch.
LEGACY COMPACTS
Page 13
X. NOTES
LEGACY COMPACTS
Page 14
Quality Refrigeration
Form Number: TR35746 | Part Number: 375-60184-00 | Revision Date: 03-2024
Traulsen © All Rights Reserved
4401 Blue Mound Road Fort Worth, Texas 76106 (USA)
Phone: 800.825.8220 | Service Fax: 817.740.6757 | E-mail: [email protected] | Website: traulsen.com
