Part Number: 18400-3211 Printed in The United States of America Rev: KBA020416
Page 2
SAFETY PRECAUTIONS
WARNING: ELECTRIC SHOCK HAZARD
WARNING
WARNING
All service requiring access to non-insulated components must be performed by
qualified service personnel. Failure to heed this warning may result in severe
electric shock.
CAUTION: ELECTRIC SHOCK HAZARD
Disconnect this appliance from electrical power before performing any
maintenance or service.
CAUTION: BURN HAZARD
Exposed metal surfaces can be hot to the touch and may cause burns.
CAUTION: STEAM HAZARD
This cabinet produces steam and may cause burns. Use caution when opening
the doors for escaping steam.
IMPORTANT SAFETY INSTRUCTIONS
When using electrical appliances basic safety precautions should be adhered to, including the following:
1) Be familiar with the appliance use, limitations and associated restrictions. Operating instructions must
be read and understood by all persons using or installing this appliance.
2) This appliance must be grounded. Connect only to properly grounded outle t.
3) Use this appliance only for its intended purpose as described in the manual.
a. This equipment is specifically designed to hold pre-cooked food at temperature.
b.
c. This equipment is not designed for industrial or laboratory use.
4) Cleanliness of this appliance and its accessories is essential to good sanitation.
5) DO NOT submerge this appliance in water. This appliance is not jet stream approved. DO NOT direct
water jet or steam jet at this appliance, or at any control panel or wiring. DO NOT splash or pour
water on, in or over any controls, control panel or wiring. DO NOT use corrosive chemicals or vapors
in this appliance.
6) DO NOT store or use this appliance outdoors. DO NOT use this product near water – for example,
7) DO NOT operate this appliance if it has a damaged cord or plug, if it is not working properly, or if it has
been damaged or dropped. Do not immerse cord or plug in water, keep cord away from heated
surfaces, and do not let cord hang over edge of table or counter.
8) DO NOT cover or block any openings on the appliance.
9) Only qualified service personnel should service this appliance.
This equipment is intended for use in commercial establishments only.
near a kitchen sink, in a wet basement, or near a swimming pool, and the like.
NOTE: The technical content of this manual, including any wiring diagrams, schematics, parts br eakdown
illustrations and/or adjustment procedures, is intended for use by qualified technical personnel and is
subject to change without notice.
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Page 3
FEATURES & SPECIFICATIONS
Precision-engineered with fan for even heat and humidity.
Humidity from low to high: dial settings from 1 to 7. Temperature
range of 90°F - 200°F.
Simple dial controls for heat and humidity. Easy dial temperature
readout.
Can be operated with or without humidity.
All swivel heavy-duty casters, front casters fitted with brakes.
Full perimeter wrap-around bumper set in extruded aluminum frame
Stainless steel insulated door
Bottom-mounted water reservoir
Under-cabinet condensation pan
Adjustable universal stainless steel pan slides are standard; stand-
ard spacing at 4.5”. Adjustable on 1.5” centers
Condensation drip trough
Condensation pan
Model
Number
HTU12 24 12 12 60
1685 W
1700 W
120 V
120V
14 Amp
14.2 Amp
60 Hz
60 Hz
Single Phase
Single Phase
Tray
Capacity*
12”x20” 18” x 26”
Slide Pairs
Provided
Inside Working
Height
in (mm)
(1524)
Water reservoir
Overall Dimensions
Height Depth Width
in (mm)
74-3/4 36-3/8 29-7/8
(1899) (924) (759)
3
Caster
Diameter
in (mm)
5
(127)
Class 100
Shipping Weight
lbs (kg)
281
(127)
Page 4
UNPACKING AND INSPECTION
This appliance
should be
thoroughly
1. Remove the cabinet from shipping carton, ensuring that all packing materials and protective plastic have been removed from the
unit.
cleaned prior to use.
See the CLEANING
INSTRUCTIONS in
2. Inspect all components for completeness and condition.
- tray racks: Qty 4; two on each side of the cabinet. Cabinets
will include a separate box of universal tray slides.
this manual.
- condensation drip pan
NOTE: DO NOT discard
the carton or other
packing materials until
1. If any freight damage is present, a freight claim must be filed immediately with the shipping company.
2. Freight damage is not covered under warranty.
you have inspected the
appliance for hidden
damage and checked it
for proper operation.
3. Check to insure all components are included: cabinet, instruction
packet and stainless steel water trough.
4. Read operation instructions completely.
Refer to FREIGHT
DAMAGE CLAIM
5. Appliance should be thoroughly cleaned before use. See
CLEANING INSTRUCTIONS in this manual.
PROCEDURE on
bottom of this page.
NOTE: For your protection, please note that equipment in this shipment was carefully inspected and packaged
by skilled personnel before leaving the factory. Upon acceptance of this shipment, the transportatio n company
assumes full responsibility for its safe delivery.
IF SHIPMENT ARRIVES DAMAGED:
1. VISIBLE LOSS OR DAMAGE: Be certain that any visible loss or damage is noted on the freight bill or
express receipt, and that the note of loss or damage is signed by the delivery person.
2. FILE CLAIM FOR DAMAGE IMMEDIATELY: Regardless of the extent of damage. Contact your dealer immediately.
3. CONCEALED DAMAGE: If damage is unnoticed unti l the merchandis e is unpack ed, noti f y the transportation company or carrier immediately, and then file a “CONCEALED DAMAGE” claim with them. This
should be done within fifteen (15) days from the date the delivery was made to you. Be sure to retain the container for inspection.
Carter-Hoffmann cannot assume liability for damage or loss incurred in transit, freight damage is not covered under warranty. We will, however, at your request, supply you with the necessary documents to
support your claim.
FREIGHT DAMAGE PROCEDURE
GROUNDING INSTRUCTIONS
This appliance is equipped with a cord having a grounding wire with a grounding plug which must be plugged
into an outlet that is properly installed and grounded. In the event of an electrical short circuit, grounding
reduces the risk of electric shock by providing an escape wire for the electric current.
WARNING—Improper use of the grounding can result in a risk of electric shock. Consult a qualified electrician or service agent if the grounding instructions are not completely understood, or if doubt exists as to
whether the appliance is properly grounded.
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Page 5
INSTALLATION and STARTUP
WARNING:
Risk of personal injury
Installation procedures must be
performed by a qualified technician
with full knowledge of all applicable
electrical codes. Failure could
result in personal injury and
property damage.
IMPORTANT:
Not under warranty
Damage to unit due to being
connected to the wrong voltage or
phase is NOT covered by warranty.
If necessary, contact a licensed
electrician to install an appropriate
20 amp electrical circuit with
correct NEMA receptacle. Power
cord is 10' long. DO NOT use an
extension cord.
1685 W120 V
1685 W
14 Amp
120V
60 Hz
14 Amp
Single Phase
60 Hz
Single Phase
LOCATION
For proper operation and maximum performance, locate the unit
in an ambient air temperature of 70ºF (21ºC).
Avoid placement in areas near exhaust fans or where there are
active air movements.
For safe operation and maximum performance, locate the unit at
least 2” from any wall or combustible material.
Unit must be on a solid level surface.
STARTUP
1. Prior to use, thoroughly clean the interior of the unit and the
water reservoir, per the instructions in this manual.
Water reservoir
CAUTION:
Electrical Shock Hazard
The ground prong of the power
cord is part of a system designed to
protect you from electric shock in
the event of internal damage.
DO NOT cut off the large round
ground prong or twist a blade to fit
an existing receptacle.
CAUTION:
Electrical Shock Hazard
Unit is not waterproof, to avoid
electrical shock, keep unit and
counter from being submerged in
water. Do not operate if unit has
been in contact with water.
2. Install condensation pan under the base of the cabinet. It
slides into the rails located under the water trough.
3. Install the universal pan slides in each tray rack located at
each side of the cabinet. Standard spacing is every third slot
(4.25” apart). Begin with the lowest slot at the bottom of the
cabinet and work your way up. Hold the slide at an angle and
line up the tabs at either end with the slots in the tray rack.
Slide the tabs into the slots, then tilt the slide down so that it
is level.
4. Plug the power cord of the cabinet into a grounded outlet with
a minimum 15 A, 120Vac, 60Hz, single phase electrical service.
5. Set POWER switch to the “ON” position.
6. Set temperature dial to 190°
F. Do not fill humidity pan. Set
humidity dial to off.
7. Do not load product into the cabinet. Allow the heat to
remove any residual oils which may adhere to inside metal
surfaces. A slight emission of smoke is common during the
first few hours of operation.
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Page 6
ON/OFF Switch
Cycle indicator for water element
Control panel layout
On/Off Cycle Light
Humidity Knob: Rotate clockwise to in-
crease humidity set-point; rotate counter-
clockwise to reduce humidity set-point.
Settings are 1-7 with 1 being the lowest and
7 being the highest.
6
Cycle indicator for heat element
Temperature dial
Temperature Knob: Rotate clock-
wise to increase temperature; rotate
counterclockwise to reduce temper-
ature.
Page 7
NORMAL OPERATION
CAUTION:
HOT SURFACE
Inner surfaces of the unit
will be very hot during and
after operation.
Avoid touching the cabinet
when loading or removing
product.
Operating ranges:
- air temp: 85ºF-200ºF
- humidity: OFF-90%
CAUTION:
STEAM HAZARD
This unit produces
steam, use caution when
cleaning or opening the
doors.
CAUTION:
WATER HAZARD
A condensation
pan is located under the
cabinet to collect condensation. Make sure to periodically check and empty it regularly to avoid overflow.
The HTU12 Series Humidified Holding Cabinet is equipped with two
dials to control the temperature and humidity settings. Before using,
familiarize yourself with the cabinet controls. See detail on page six
of this manual.
This holding cabinet is equipped with an active air flow and humidity
system. Warm air flows over the water that is heated by an element
in the reservoir and is circulated throughout the cabinet. As the
cabinet maintains the desired humidity level, water will be used from
the reservoir. To maintain desired humidity, replenish water supply
in reservoir when necessary. Monitor water level in condensation
collection pan under the cabinet and empty when full.
HOLDING
1. Fill water reservoir with WARM WATER if humidity is desired
(cabinet may also be operated without humidity). Watch water
level in water pan. Do not overfill. Approximate capacity:
HTU12: 1.75 gallons
2. Turn cabinet on and set temperature and humidity dials to
desired settings. Allow cabinet to preheat for 45 minutes.
3. Load cabinet with pans or trays. Load from bottom to top for
best results.
4. When removing items, start at the bottom and work to the top.
This keeps food hotter and eliminates spillage onto lower items.
Due to food safety concerns, we recommend that the holding
temperature should not be set below 140°F.
PROOFING
1. Fill water reservoir with WARM WATER. Watch water level in
water pan. Do not overfill. Approximate capacity:
HTU12: 1.75 gallons
2. Turn cabinet on. Set temperature dial to lowest setting and
humidity to 7. Allow cabinet to preheat for 45 minutes.
3. Load cabinet with pans or trays. Load from bottom to top for
best results.
4. Proof according to your recipe instructions.
5. When removing items, start at the bottom and work to the top.
This keeps food hotter and eliminates spillage onto lower items.
Water reservoir located at bottom of cabinet interior.
To fill, pour water into the reservoir.
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Page 8
FOOD HOLDING GUIDE
CAUTION: SAFE
FOOD HOLDING
PRACTICES
RECOMMENDED
Cooking food to a safe
temperature, holding at a
temperature of at least 140°
F is critical in the prevention
of foodborne illness. Hold
only cooked, hot food at
140°F or higher. This
cabinet is not intended to
cook or reheat food. Food
must be at appropriate temperature before being
placed into cabinet.
COOK TO AT LEAST
165°F Destruction of
165°F
140°F
41°F
NOTE: Times and temperatures
observed in a test kitchen environment. Times and temperatures
may vary, depending on initial food
quality, initial cooked temperature
and user expectations of acceptable food quality.
Disconnect appliance from
electric power before cleaning.
CAUTION:
HOT SURFACE
Exposed surfaces can
be hot to the touch and may
cause burns. Allow appliance
to cool before cleaning.
IMPORTANT:
DO NOT spill or pour
water into controls,
control panel or wiring.
Water damage is not covered
by warranty.
CAUTION
STEAM HAZARD
Cabinet generates steam, use
caution when opening doors to
clean unit.
CAUTION:
Beware of sharp edges with sheet metal
during cleaning process.
:
1. After all food products have been removed from the cabinet,
turn the power switch to “OFF” and allow the cabinet to cool.
2. Unplug the unit prior to any cleaning.
3. Remove and clean the water pan from the inside bottom of the
cabinet. Caution, water may still be hot from prior use. A
vinegar & water solution may be used to remove stubborn
mineral deposits. Remove and clean the condensation collection pan mounted to the bottom of the unit.
4. Remove the slide racks. Clean the inside of the unit as well as
the removed parts. Reinstall when all parts are dry and clean.
5. Take care to ensure that no water comes into contact with the
internal controls or electrical areas of the cabinet.
6. Plastic control panel should be washed with a clean damp
cloth and chlorine-free detergent. Rinse thoroughly with clean
damp cloth and allow to dry. Do not use abrasive cleaners,
waxes, car polish, or substances containing strong aromatic
solvents or alcohol.
CAUTION: Cleansers, detergents, degreasers,
sanitizers, or bleaching agents that contain chlorides
or phosphates will cause permanent damage to
stainless steel products. The damage appears as pits, eruptions,
voids, small holes, severe discoloration or dulling of the metal
finish.
Water with high chloride content can also damage stainless
steel. If unsure of your water quality, we recommend you have it
tested. THIS DAMAGE IS PERMANENT, COSTLY TO REPAIR,
AND IS NOT COVERED BY THE WARRANTY.
RECOMMENDED TIPS FOR CLEANING STAINLESS STEEL
Purpose Frequency Cleaning Agent Method of Application
Routine Daily Soap, ammonia Sponge with cloth, rinse with clear water
cleaning detergent and water and wipe dry.
Smears/ As Stainless steel cleaner Rub with soft cloth as directed on package.
Fingerprints needed or similar products Rub in direction of grain of stainless steel.
Do not use on vinyl trim.
Stubborn Daily Any chloride-free Apply with damp sponge or cloth. Rub in
spots and as or direction of grain of stainless steel. Rinse
stains needed phosphate-free thoroughly, especially if cleaner contains
cleaner chlorine bleach, do not use on vinyl trim.
Hard water Daily Vinegar Swab with cloth.
spots as needed Rinse with water and wipe dry.
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Page 10
CABINET MAINTENANCE
WARNING:
DO NOT perform
these procedures
while the cabinet is turned on
or heated. Turn off the power
and wait for the cabinet to cool
to room temperature.
CAUTION:
Do not move cabinet
unless door is securely closed. Serious damage to
hinges and door may result if
bumped into tables, walls, or
other equipment when the
doors are open.
CASTERS
Caster bearings are equipped with Zerk grease fittings so that they
may be easily lubricated with a grease gun. Lubricate bearings at
least once every six months.
REPLACING THE DOOR GASKET
1. Remove the screws located under the gasket on the cabinet.
2. Remove the gasket and discard.
3. Install the new gasket and replace the screws.
REPLACEMENT PARTS
Use only
(OEM) original
equipment
manufacturer replacement parts.
Using unauthorized
parts may cause
serious injury.
Replacement parts
should be installed by a
qualified service
technician.
Contact factory with
your model and serial
number for replacement
parts.
Part Number Description
17020-2294 Door gasket
18600-0046Hi limit-300°F; water and air
18600-0137 Humidity stat
18600-0129 Thermostat
18601-1171Red power indicator light
18602-0289 ON/OFF Switch
18603-0037 Fan motor
18603-5017Fan blade (for motor 18603-0037)
18603-5021 Motor cooling fan
18605-0016Power cord with NEMA 5-15P plug
16505-7080 Drip pan
18314-0040Stainless steel water reservoir pan
18612-0151 Heat element 350 W (water reservoir)
18612-0425 Heat element 1300 W (air)
18616-0014Dial thermometer
18616-9998Cord grip
29034-0282Silicone sponge seal
For units with CE certification 18600-0046 is replaced with:
18600-0136 Jumo hi limit; 1000 mm lead (water)
18600-0135 Jumo hi limit; 100 mm lead (air)
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Page 11
WIRING DIAGRAM
HTU12 WITH ANALOG CONTROL
120 VOLT, 1700 WATT, 14.2 AMP, 1 PH, 60 HZ
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Page 12
TROUBLESHOOTING GUIDE
SYMPTOM POSSIBLE CAUSE SUGGESTED REMEDY
No power on display
Food dries out too
quickly/humidity too
low
Unit is on, motors
are running but no
heat
Unit is hot
but low or no airflow
Not plugged in or circuit breaker
tripped
Power cord damaged Check - replace if required
Power switch damaged or defective Check - replace if required
Operation where product temp is too
high
Control incorrectly set or defective Check proper operation or calibration
Intermediate switch failure Call service technician
Hi limit trip / defective Call service technician
Heating element failed
Element hi-limit trip / defective Call service technician
Thermostat defective Call service technician
Circulation motor has quit Call service technician
Check or reset circuit breaker
Connect to proper receptacle
Check product temps going into
holding cabinet
of control
Call service technician
Improper voltage Call service technician to verify
NOTE:
The technical content of this manual,
including any wiring diagrams, schematics, parts breakdown illustrations and / or
adjustment procedures, is intended for
use ONLY by qualified technical personnel
.
incoming voltage matches cabinet
specifications.
NOTE:
For warranty service, call Carter-Hoffmann
direct at 800-323-9793 for authorization,
we will dispatch the nearest authorized
service agency.
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Page 13
WARRANTY
Carter-Hoffmann Warranty:
Carter-Hoffmann (“CARTER-HOFFMANN”) warrants to the initial purchaser of its standard Carter
Line Products that CARTER-HOFFMANN will, at its option, repair or replace, during the warranty
period set forth below, any part of such products made necessary due to a defect in material or
workmanship which is present when the product leaves its factory and which manifests itself during the
warranty period under normal use and service.
This warranty applies only to original equipment owned and possessed by the initial purchaser and the
warranty period begins on the date of original shipment from the CARTER-HOFFMANN factory and
extends as follows: to component parts and labor for 12 months (36 months on hotLOGIX holding cabinets and cook & hold cabinets) ; to refrigeration compressor unit for one year (limited to
replacement only - not to include labor for removal, repair or replacement).
Repair or replacements under this warranty will be performed, unless otherwise authorized in writing
by CARTER-HOFFMANN, at its factory. All parts or components to be repaired or replaced under this
warranty are to be shipped prepaid to CARTER-HOFFMANN, with reimbursement credit for such part
or component to be given if found by CARTER-HOFFMANN to be defective.
CARTER-HOFFMANN neither makes nor assumes and does not authorize any other person to make or
assume any obligation or liability in connection with its products other than that covered in this
warranty. This warranty applies only within the continental Un ited States and Canada. In Alaska and
Hawaii, this warranty applies only to and is limited to the supply of replacement parts.
Warranty Exclusions and Limitations:
Any implied warranty of merchantability or fitness for a particular purpose is hereby specifically
disclaimed by CARTER-HOFFMANN. There are no warranties, expressed or implied, which extend
beyond the description on the face hereof. This warranty does not cover and CARTER-HOFFMANN
shall not under any circumstances be liable for any incidental, consequential or other damages (such
as injury to persons or property, loss of time, inconvenience, loss of business or profits, or other
matters not specifically covered) arising in connection with the use of, inability to use, or failure of
these products.
Specifications subject to change through product improvement and innovation.