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Traulsen & Co., Inc.
Quality Refrigeration
OWNER’S MANUALOWNER’S MANUAL
OWNER’S MANUAL
OWNER’S MANUALOWNER’S MANUAL
Instructions for the installation, operation
and maintenance of all Traulsen:
RAC37 Air-Curtain Refrigerators
This Traulsen unit is built to our highest quality standards. We build our refrigerators, freezers and heated
cabinets 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 confidence 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 file 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 affixed
to the unit. Should you need service, however, call us on our toll free number, 800-825-8220 between 7:30
am and 4:30 pm CST, Monday thru Friday. 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:
RAC DOC REV. 2/03 P/N 375-70001-00
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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-Clearance Page 2
d-Wiring Diagram Page 2
e-Cord & Plug Page 2
f-Power Supply Page 2
IV. INTENDED USE
a-Overview Page 2
b-Typical Operating Parameters Page 2
c-Suggested Pan Sizing Page 3
d-Product Unloading Page 3
V. PRODUCT FEATURES
a-Casters Page 3
b-Grips & Handles Page 3
c-Microprocessor Control Page 3
d-On Demand Defrost Page 3
e-Condensate Evaporator Page 3
f-Tray Slides Page 3
g-Wrap Around Bumper Page 3
VI. OPERATION
a-Air Curtain Operation Overview Page 4
b-Normal Temperature Ranges Page 4
c-Loading/Unloading The Unit Page 4
d-Recommendation Summary Page 4
VI. ELECTRONIC CONTROLLER
a-Control Overview Page 3
b-Control Feature: Temp Recall Page 3
c-Control Feature: ON/OFF Page 3
d-Control Feature: On Light Page 4
e-Control Feature: Cycle Light Page 4
f-Control Feature: On Demand Defrost Page 4
g-Control Feature: Two-Stage Thermostat Page 4
H-Control Function Buttons Page 4
VII. CARE & MAINTENANCE
a-Cleaning The Condenser Page 5
b-Cleaning The Exterior Page 5
c-Cleaning The Interior Page 5
VIII. OTHER
a-Service Information Page 5
b-Spare Parts Page 5
c-Warranty Registration Page 5
IX. TROUBLESHOOTING GUIDE Page 6-7
X. WIRING DIAGRAM Page 8
XI. WARRANTY INFORMATION Page 9
XII. INDEX Page 10
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 affixed sticker 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 on the upper
right interior side wall of all air curtain models.
READING THE SERIAL TAG
• Serial = The permanent ID# of your Traulsen
• Model = The model # of your Traulsen
• Volts = Voltage
• Hz = Cycle
• PH = Phase
• Total Current = Maximum amp draw
• Minimum Circuit = Minimum circuit required
• Lights = Light wattage
• Heaters = Heater amperage
• 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 (cont’d)
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. All interior fittings
have been carefully secured to prevent damage.
You should carefully inspect your Traulsen 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 this. A freight
claim should be filed immediately. If damage is subsequently noted during or immediately after installation, contact the respective carrier and file a freight
claim. Under no condition may a damaged unit be returned to Traulsen & Co. without first obtaining written permission (return authorization).
III. INSTALLATION
III. a - LOCATION:
Select a proper location for your Traulsen unit, away
from extreme heat or cold. Allow enough clearance
between the unit and the side wall so that the door (s)
may open a minimum of 90°.
III. e - CORD & PLUG:
Traulsen Air Curtain models are supplied with a cord
& 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 connection to be certain that proper voltage for the cabinet wiring is available (refer to the serial tag to determine correct unit voltage). Make connections in accordance with local electrical codes. Use qualified
electricians.
Use of a separate, dedicated 20 amp 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).
III. b - PACKAGING:
Traulsen Air Curtain units are shipped from the factory strapped 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.
These should first be removed to avoid scratching the
unit when lifting off the crate.
To remove the wooden pallet, first if at all possible, we
suggest that the cabinet remain strapped to the pallet
during all transportation to the point of final installation. The straps can then be removed with a wire cutter and the unit rolled off the skid. Avoid laying the
unit on its front, side or back for removal of the pallet.
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 - CLEARANCE:
It is important for the proper operation and longevity
of your Traulsen unit that it have adequate provisions
for air supply to the compressor. Allow approximately
6-12” between the back grill of the unit and the wall
for proper air flow.
III. d - WIRING DIAGRAM:
Refer to the wiring diagram for any service work performed on the unit. Should you require one, please
contact Traulsen Service at (800) 825-8220, and provide the model and serial number of the unit involved.
IV. INTENDED USE
IV. a - OVERVIEW:
The Air Curtain Refrigerator is more than just a refrigerator. When the door of the unit is closed, it operates
as a force air refrigerator with a highly efficient refrigeration system that provides faster “pull down” and
“recovery” times. When the door is opened, a series
of blower fans create a “wall” of air and areas of pressure, localizing a pattern of air movement across the
cabinet opening. This AIR CURTAIN seals itself around
objects so that, in effect, the door is both “open” and
“closed” at the same time.
For best results, the air curtain was designed for “low
profile” food products typical of tray line/assembly line
and flight kitchen operations.
IV. b - TYPICAL OPERATING PARAMETERS:
The “curtain” is capable of maintaining 45°F tempera-
ture or below for approximately 45 minutes. HOWEVER, actual time your unit will run in this temperature zone depends on many factors, such as, room
ambient temperature and humidity levels, the amount
of time your unit was allowed to precondition the
food(s), food temperatures when placed in the unit,
type of food packaging, and profile of foods. It should
also be noted that there is a lag time between the “ambient air” temperature in the cabinet and that of the
actual product temperature. The food temperature
differential can be 10 - 20 degrees F cooler than the
temperature indicated by the temperature display.
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IV. INTENDED USE (continued) V. PRODUCT FEATURES (cont’d)
SUGGESTED PAN SIZING:
IV. c Traulsen has designed this unit to operate with either
18” x 26” or 12” x 20” pans. Generally, 12” x 20”
pans block air flow which leads to reduced unit performance. While we strongly recommend the use of
18” x 26” rather than 12” x 20” pans, the latter may
still be used. However, when using 12” x 20” pans
these should be placed towards the top and bottom of
the unit to reduce the total blockage of air flow.
IV. d -
PRODUCT UNLOADING:
When unloading product from the Air Curtain
refrogerator, we recommend that this be done from
the top down.
V. PRODUCT FEATURES
V. a - CASTERS:
6” high casters are supplied standard for Air-Curtain
models. They are attached to 10-gauge stainless steel
corner plate reinforcements/stress pads. These are
shipped already installed on the unit for immediate use.
V. b - GRIPS & HANDLES:
For easy mobility, stainless steel recessed hand grips
are provided on the left and right sides. In addition, a
1” welded tubular push/pull handle is attached to the
rear of the cabinet.
V. c - MICROPROCESSOR CONTROL:
All Traulsen Air Curtain units manufactured after January 2003 include a 2-Stage microprocessor control.
Units manufactured prior to that date were provided
with manual electromechanical controls
V. d - ON DEMAN DEFROST:
Traulsen Air-Curtain models are supplied with a momentary defrost cycle. It is located on the front control (see figure 1), and by depressing the switch, the
unit will momentarily disable the compressor, the coil
and the fans. This “On-Demand Defrost” feature allows proper defrosting of the accumulated condensation. Condensate is removed through use of an electric condensate evaporator drain pan.
V. e - CONDENSATE EVAPORATOR:
During the “On-Demand Defrost” cycle or the “Off
Cycle” of the compressor, the evaporator coil will defrost. The condensate from the evaporator coil flows
from the top of the unit down a drain in the back to a
condensate pan. Vapor escapes through the back grill.
The vapor can sometimes be visible and should be
considered a normal operating condition.
Proper attention should be given to defrosting your
unit. Every “event” or time the unit is used with the
door open, the coil will build-up ice. This reduces the
effectiveness of the overall operation of the unit.
V. f - TRAY SLIDES:
Ten (10) pairs of removable tray slides are provided
standard at 4-1/2” spacing. Additional tray slides may
also be purchased for a total of no more than 15 pairs
at 3” spacing. Each tray slide can accommodate either one (1) 18”x 26” or one (1) 12” x 20” pan. The
tray slides allow for individual pans to be pulled out
3/4 of their length without tipping. In addition, the side
wall air ducts are designed with two (2) tabs, which
act as a backstop, providing better air flow, which is
important to maintaining proper temperatures throughout the cabinet.
V. g - WRAP-AROUND PERIMETER BUMPERS:
As the Air-Curtain refrigerator was designed to be mobile, a full perimeter rubber bumper guard is included
to protect walls and doors during movement.
VI. ELECTRONIC CONTROLLER
VI. a - CONTROL OVERVIEW:
The Traulsen Air Curtain models are supplied standard
with an easy to use microprocessor control. It features several important user functions, greatly enhancing the overall utility of the cabinet.
VI. b - CONTROL FEATURE - TEMP RECALL:
This feature allow the operator to display either the
actual internal cabinet air temperature (default), or the
desired “Set-Point” temperature (alternate).
ACTUAL: The factory default setting shows the actual
internal cabinet temperature and acts as a digital thermometer. A momentary touch of the TEMP RECALL
button will recall the original dial setting. The display
will then automatically return the displaying the actual internal cabinet temperature.
SET-POINT: To display the set-point temperature instead of the actual internal cabinet temperature, press
and hold the TEMP RECALL button for five (5) seconds. The fourth digit on the display will flash either
“S” (SET) or “A” (ACTUAL) to indicate which mode is
active. To switch back again, repeat this step holding
the TEMP RECALL button for five (5) seconds.
VI. c - CONTROL FEATURE - ON/OFF:
This button has two uses, the first is to turn the unit
ON and OFF. The second allows for the temperature
display to be changed to indicate either degrees Fahrenheit or degrees Celsius.
To change between temperature scales, press and hold
the ON/OFF button for five (5) seconds. The display
will then switch from “dgF” to “dgC”. Repeat this
step to change the temperature scale again.
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