Traulsen TU072LT, TU044LT, TU100HT, TU044HT, TU072HT User Manual
Quality Refrigeration
OWNER’S MANUAL
Instructions for the installation, operation
and maintenance of Traulsen:
TU Series Full-Size Undercounter Refrigerators
TU044HT, TU072HT & TU100HT
TU Series Full-Size Undercounter Freezers
TU044LT & TU072LT
This Traulsen unit is built to our highest quality standards. We build our refrigerators and freezers this way as a matter of
pride. This philosophy has made Traulsen the leader in commercial refrigeration since 1938. We thank you for your choice
and condence in Traulsen equipment and we know you will receive many years of utility from this equipment.
All Traulsen units are placed on a permanent record le with the service department. In the event of any future questions you may have, please refer to the model and serial number found on the name tag axed to the unit. Should
you need service, call us on our toll free number, 800-825-8220 between 7:30 am - 4:30 pm CST, Monday thru Friday.
You may also log onto www.traulsen.com for further information. It is our pleasure to help and assist you in every
possible way.
INSTALLER
COMPLETE THE FOLLOWING INFORMATION PRIOR TO UNIT INSTALLATION
INITIAL START DATE: SERIAL NO.
MODEL TYPE:
COMPANY/INDIVIDUAL NAME:
INSTALLER:
FORM NUMBER TR35745 REV. 1/08 P/N 375-60297-00
TABLE OF CONTENTS
I. THE SERIAL TAG Page 1
II. RECEIPT INSPECTION Page 2
III. INSTALLATION
a-Location Page 2
b-Packaging Page 2
c-Adjusting the Casters Page 2
d-Cord & Plug Page 2
e-Power Supply Page 2
IV. OPERATION
a-Refrigerators Page 3
b-Freezers Page 3
V. CARE & MAINTENANCE
a-Cleaning The Condenser/Filter Page 3
b-Replacing The Gaskets Page 4
c-Cleaning The Cabinet Surface Page 4
VI. DRAWERS
a-Removing The Door And Installing Drawers Page 4
VII. MICROPROCESSOR CONTROL
a-Control Features Page 5
b-Alarm Explanations Page 6
c-Control Panel Diagram Page 7
d-Notes To The User Page 7
e-Enter The Service Access Page 8
f-Service Parameters Page 9
g-Adjusting Thermostat Set Point High Page 9
h-Adjusting Thermostat Set Point Low Page 10
i-Changing The Temperature Scale Page 10
j-Setting The 24-Hour Clock Page 11
k-Setting The Date Page 12
l-Setting Daylight Savings Time Page 12
m-Starting A Manual Defrost Page 13
n-Setting Defrost Lockouts Page 14
o-Adjusting The Drawer Perimeter Heaters Page 15
p-Adjusting The Room Temperature Oset Page 15
q-Setting The Audible Alarm Style Page 16
r-Viewing Sensor Temperatures Page 16
VIII. WIRING DIAGRAM Page 17
IX. TROUBLE SHOOTING GUIDE Page 18
X. SERVICE ASSISTANCE
a-Service Information Page 19
b-Spare Parts Information Page 19
c-Warranty Registration Page 19
XI. WARRANTIES Page 20
XII. SERVICE PARTS LIST Page 21
FORT WORTH, TX.
SERIAL MODEL
VOLTS Hz PH
TOTAL CURRENT AMPS
MINIMUM CIRCUIT AMPS
MAXIMUM OVERCURRENT PROTECTION AMPS
LIGHTS WATTS
HEATERS AMPS
REFRIGERANT TYPE OZ
DESIGN PRESSURE HIGH LOW
REFRIGERANT TYPE OZ
DESIGN PRESSURE HIGH LOW
370-60294-00 REV (A)
I. THE SERIAL TAG
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 full-size undercounter models.
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
• Design Pressure = High & low side operating
pressures and refrigerant charge
• Agency Labels = Designates agency listings
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II. RECEIPT INSPECTION
III. INSTALLATION (continued)
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.
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 door stay
open feature at 1200 (self-closing feature operates up to
900). The door(s) must be able to open a minimum of 900
in order to make use of the maximum clear door width.
III. b - PACKAGING:
Your Traulsen unit is shipped from the factory bolted to a
sturdy wooden pallet in stretch wrapped material.
Most exterior stainless steel surfaces have a protective
vinyl covering to prevent scratching during manufacturing, shipping and installation. After the unit is installed in
place of application peel, remove and discard the covering
from all surfaces.
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 then be removed with a 1/2” socket wrench.
Avoid laying the unit on its front, side or back for removal
of the pallet.
NOTE: Traulsen does not recommend laying the unit
on its front, side or back. If you must, please allow the
unit to remain in an upright position for 24 hours before
plugging it in so that the compressor oils and refrigerant
may settle.
III. c - INSTALLING/ADJUSTING LEGS OR CASTERS:
To install legs or casters, slide leg or caster into the caster
channel from the side of the unit without the refrigeration
system.
To adjust the legs or casters, loosen the two bolts and move
leg or caster to desired location, spacing between leg or caster
not to exceed 48 inches. Leg or caster on each end of the unit
can not exceed 8 inches from the end of the cabinet.
NOTE: Traulsen recommends to position legs or casters under
the mullion when possible.
CASTER CHANNEL
BOLT
CASTER PLATE
III. d - CORD & PLUG:
All self-contained models are shipped standard with a NEMA
5-15P plug and 9 foot cord . Select only a dedicated electrical
outlet 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. e - POWER SUPPLY:
The supply voltage should be checked prior to 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 overcurrent
protector in circuit (see amperage requirements on the unit’s
serial tag).
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IV. OPERATION
V. CARE & MAINTENANCE
IV. a - REFRIGERATORS:
Both refrigerators and Freezers do not require manual
defrosting. During normal operation, a refrigerator continuously circulates above freezing cabinet air through the
coil. A compressor “OFF” cycle occurs every 2 1/2 Hours
for 20 minutes to melt any frost which may accumulate
on the coil during the compressor “ON” cycle. The control
will read “dEF” and the green water drop will be illuminated. With standard holding refrigerators, high relative
humidity is also maintained to prevent dehydration of
stored product.
INTELA-TRAUL
°F °C
FREEZER
SET
IV. b - FREEZERS:
During normal operation, a freezer continuously circulates below freezing cabinet air through the coil. The
coil requires a periodic defrosting for proper operation.
This is accomplished by an automatic, time activated,
temperature/time terminated, defrost program, utilizing
hot gas from the refrigeration system. The controller is
preset at the factory for six equally spaced defrost cycles
within each 24-hour period.
IV. b - FREEZERS (continued):
During freezer defrost operation, heat is conned to the
coil enclosure to prevent any signicant rise in temperature within the food zone. The fan delay control function
upon termination of a defrost cycle is two-fold. First, to
prevent blowing warm air into the food storage area.
Second, to prevent any condensation on the defrost coil
from being blown into the food storage area.
The microprocessor control is set from the factory to terminated defrost at 20 minutes in the event of sensor failure.
This setting should never be tampered with, without rst
consulting Traulsen’s Technical Service department.
V. a - CLEANING THE CONDENSER/FILTER:
The most important thing you can do to insure a long,
reliable service life for your Traulsen is to regularly clean
the condenser coil and or lter if provided.
The microprocessor control will notify you through a
“CLN-FIL” message when the condensing temperature of
the refrigerator reaches 140 degrees F or greater. If the
condensing temperature reaches 160 degrees F the compressor will automatically turn o . When the temperature
drops below 140 degrees F the compressor will restart
and when the temperature drops below 120 degrees F
the alarm will reset.
WARNING: DISCONNECT ELECTRICAL POWER SUPPLY
BEFORE CLEANING ANY PARTS OF THE UNIT.
At the start of a freezer defrost cycle, the compressor,
condenser fan and evaporator fan shut o. The hot gas
relay will be energized, this will energize the hot gas
solenoid valve thru the normally open contacts and the
condenser fan circuit will be de-energized thru the (normally closed contacts), and the compressor will restart.
When the evaporator coil sensor reaches 400 F the coil is
fully defrosted or if the maximum time of defrost duration (20 minutes) is reached (which ever comes rst) then
the defrost hot gas relay is de-energized. The condenser
fan restarts and the hot gas solenoid valve closes, The
compressor system returns to the cooling mode. Total
refrigeration system operation is then resumed (green
snowake icon goes out) and the display will show def
for an additional 10 minutes then return to reading the
inside cabinet temperature. The evaporator fan(s) are
delayed from starting at the termination of the defrost
cycle and will automatically resume by time or temp delay
(5 minutes or 300 F coil sensor temperature, whichever
comes rst ).
To clean the condenser/lter, rst disconnect electrical
power to the cabinet and remove the front louver assembly. To do so, place hands under the louver panel and
pull out and up to get louver panel o bracket of the unit.
See diagram below.
Proceed to vacuum or brush any dirt, lint or dust from
the nned condenser coil/lter, the compressor and other
cooling system parts. If signicant dirt is clogging the condenser ns or lter, use compressed air to blow this clear.
To replace the louver assembly reverse the process.
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V. CARE & MAINTENANCE-(continued) VI. DRAWERS
V. b - REPLACING THE GASKETS:
To remove the gasket to be replaced, grasp it rmly by one
corner and pull it out. Before attempting to install a new
gasket, both the unit and the gasket itself must be at room
temperature. Insert the four corners rst by using a rubber
mallet (or hammer with a block of wood). After the corners
are properly inserted, work your way towards the center from
both ends by gently hitting with a mallet until the gasket
is completely seated in place (see gure below for proper
gasket placement).
NOTE: The gasket may appear too large, but if it is installed
as indicated above it will slip into place.
GASKET ASSEMBLY
SIDE DOOR PANEL
VERTICAL GASKET
RETAINER
Fig. 5
VI. a - REMOVING THE DOOR AND INSTALLING
DRAWERS:
Doors are supplied standard on all TU Series Full-Size Undercounter models. However, we have engineered our
models with a drop-in feature that allows you to easily
convert door(s) into two 6” deep drawers or three 4” deep
drawers.
The door(s) on all models can easily be converted to drawers in the eld. To begin the process, 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
plate and then the door from the top hinge bracket. The
hinge plate pin and plastic bushing will remain in the top
hinge plate.
NOTE: The lower hinge plate is under spring tension.
Once the door(s) have been removed, Insert drawer frame
as shown below.
V. c - CLEANING THE CABINET SURFACES:
WARNING: DISCONNECT ELECTRICAL POWER SUPPLY
BEFORE CLEANING ANY PARTS OF THE UNIT.
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 cleansers containing chlorine, such as bleach, this may
promote corrosion of the stainless steel.
Care should also be taken to avoid splashing the unit with
water, containing chlorinated cleansers, when mopping the
oor around the unit.
For stubborn odor or spills, use baking soda and water (mixed
to a 1 tbsp baking soda to 1 pint water ratio).
A stainless steel polish is recommended for shining of unit.
Once the drawer frame has been inserted, the drawer frame
module can be installed by tighting the black front and back
clamping knobs (2 of each) located on the cross rail locks
and liner locks. Slide the front cross rail locks towards the
center of the drawer frame module and allow the liner locks
to drop down from the top of the liner. Insert the door frame
module push towards the back of the unit. The entire frame
assembly is now installed and ready for use.
NOTE: Repeat process for multiple drawer(s) inserts.
Front Clamping
Knobs
Front Cross
Rail Locks
-4-
Back Clamping
Knobs
VII. MICROPROCESSOR CONTROL
Your new refrigerator or freezer cabinet is equipped with a state-of-the-art microprocessor control, which precisely
regulates operation and provides alarms when problems occur. It is supplied from the factory completely ready for
use and requires no adjustments, but without the audible alarms activated. See pages 6 thru 16 for more information.
INTELA-TRAUL
°F °C
FREEZER
VII. a - CONTROL FEATURES:
1- Internal Time Clock
• Eliminates external defrost time clock.
• Defrost cycle can be quickly adjusted to suit individual location and use.
• Must be set at power-up. (See page 11, “Setting the 24-Hour Clock”)
• Will automatically update for Daylight Savings Time.
2- Water Resistant Housing - The face of the control is water resistant to provide for protection during cleaning.
3- Parameter/Service Levels
• See “Customer / Service Parameters” on Page 9.
SET
MICROPROCESSOR CONTROL
4- Defrost Lockouts - See “Setting Defrost Lockouts” on page 14.
Customers can set up to 4 dierent defrost lockout periods. The lockout prevents the unit from going into a defrost
cycle during peak kitchen use. Note: The 24-hour clock must be set for this feature to operate correctly.
5- Communication Ability - A NAFEM Data Protocol (NDP) compliant RS-485 serial communications port is available to
interface with data collection software (by others). All microprocessor control equipped models are capable of com-
municating within a NAFEM Data Protocol network if provided with an optional Gateway Hub (available from Traulsen).
The actual communications software is available from a number of third party software vendors.
6- Anti-Condensate Door Perimeter Heater Control
The “No-Sweat” feature is an energy savings system that allows the customer to adjust the percent of time for the door/
drawer heater to be “On” as needed for the prevailing ambient conditions (from 0 - 100% of the time each day). It is
used to prevent condensation from forming around the perimeter of the drawers. The factory default setting is 100%.
Adjust this set point down to a point just before condensation forms to save energy.
7- Alarms (See the following pages for explanations)
• High Cabinet Air Temperature
• Low Cabinet Air Temperature
• Loss Of Power
• Sensor Failure
• Clean Condenser
8- Display Features
• 3-Digit LED Display
• Defrost in Progress Icon
• Fahrenheit or Celsius Temperature Scale In Use
-5-
VII. MICROPROCESSOR CONTROL (continued)
VII. b - ALARM EXPLANATIONS:
*NOTE: Explanation of alarms assume the audible alarm style is set at a 3-second burst or a continuous audible
alarm. References to the audible alarm do not apply if the audible alarm style is set to OFF (Refer to page 16 for
setting the audible alarm style).
High Cabinet Air Temperature: The audible alarm will sound and the display will read HI
CAb when the temperature inside the cabinet rises above a pre-programmed limit. The limit
is determined by the type of unit being operated (i.e.: refrigerator/freezer). To turn o the
audible alarm, press the alarm cancel button. The visual alarm text will continue to display
until the cabinet air temperature falls below the limit. If the temperature does not fall below
the limit within 5 minutes, the audible alarm* will sound again and an additional Call Service
message will display.
POSSIBLE CAUSES:
• Doors open for extended periods of time.
• Large amounts of hot product placed inside the cabinet.
• Condenser coil dirty.
• Cooling Compressor Failure. Call Service.
• Refrigeration Problems.
Low Cabinet Air Temperature: The audible alarm will sound and the display will read Lo
Cab when the temperature inside the cabinet falls below a pre-programmed limit. The limit
is determined by the type of unit being operated (i.e.: refrigerator/ freezer). To turn o the
audible alarm, press the alarm cancel button. The visual alarm text will continue to display
until the cabinet air temperature rises above the limit. If the temperature does not rise above
the limit within 5 minutes, the audible alarm will sound again and an additional Call Service
message will display.
POSSIBLE CAUSES:
• No product in unit.
• Failed sensors.
• Stuck Evaporator Relay.
Loss Of Power: The audible alarm will sound and the display will read ELE LOS, when the
unit regains power after an outage. To turn o the audible alarm and/or clear the visual text,
press the alarm cancel button.
Condenser Clean: The audible alarm will sound and the display will read “Clean Filter” when
discharge temperatures exceeds 140 degrees. As the load on the condenser decreases, the
alarm will turn o by itself. As the temperature on the condenser continue to rise, the audible
alarm will return until the problem has been eliminated.
NOTE: If discharge temperature rises above 1600F the compressor & condenser fan motor
will be switched o until the discharge temp falls below 1400F
Sensor Failures:
The audible alarm will sound and the display will read CAB SEN, COL SEN or DIS SEN when
that particular sensor has failed to operate. To turn o the audible alarm, press the alarm
cancel function of the sensor, the audible alarm will sound again in either 5 minutes or 24
hours. Note: Test sensor in ice water.
-6-
VII. MICROPROCESSOR CONTROL (continued)
VII. c - CONTROL PANEL DIAGRAM:
0
F LED & 0C LED
°F °C
FREEZER
INTELA-TRAUL
LED DISPLAY
DEFROST SYBMBOL
SET BUTTON
SET
RED ALARM
LIGHT
UP BUTTON
&
DOWN BUTTON
ALARM CANCEL BUTTON
VII. d - NOTES TO THE USER:
You only have 20-30 seconds between button pushes. If you take longer than 30 seconds, the controller will revert back
to displaying the cabinet temperature. If you enter the wrong security code, the controller will revert back to displaying
the cabinet temperature. You can exit the parameters at any time by pressing the alarm cancel button or by waiting 20-30
seconds.
-7-
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