Carter Hoffmann HTU12 Service Manual

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HUMIDIFIED HOLDING & TRANSPORT CART
MODEL: HTU12
OWNERS / OPERATORS MANUAL
MANUFACTURED BY:
CARTER-HOFFMANN
1551 McCormick Avenue
Mundelein, IL 60060 U.S.A.
Phone: 847-362-5500
Fax: 847-367-8981
Toll Free: 800-323-9793
Email: technicalservice@carter-hoffmann.com
TABLE OF CONTENTS
SAFETY PRECAUTIONS……………………………..……….. 2
UNPACKING, INSPECTION & FREIGHT DAMAGE……….. 4 INSTALLATION & STARTUP …………………….…………… 5 CONTROL PANEL LAYOUT………………………………….. 6 NORMAL OPERATION……………………...………………… 7 FOOD HOLDING GUIDE………………………………………. 8 REGULAR CLEANING PROCEDURES………………..……. 9 CABINET MAINTENANCE & REPLACEMENT PARTS…… 10 WIRING DIAGRAM...…………………………………………… 11
TROUBLESHOOTING GUIDE ……………………………….. 12
WARRANTY STATEMENT……….……………….………….. 13
Part Number: 18400-3211 Printed in The United States of America Rev: KBA020416
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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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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)
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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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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 W 120 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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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.
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Cycle indicator for heat element
Temperature dial
Temperature Knob: Rotate clock-
wise to increase temperature; rotate
counterclockwise to reduce temper-
ature.
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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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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.
most bacteria
HOLD at 140°F or higher
DANGER ZONE: 41°F to 140°F Bacteria grow rapidly
PRODUCT (Uncovered Food, except where noted)
Bacon, Canadian 180°F / 82°C 50% 30 Bacon, Crisp 180°F / 82°C NONE REQUIRED 30 Baked Potato 180°F / 82°C 60% 60 Biscuits 170°F / 77°C 20% 60 Casseroles (Covered) 175°F / 79°C NONE REQUIRED 90 Chops, Sliced Meats 160°F / 71°C 45% 60 Chicken, Fried 170°F / 77°C NONE REQUIRED 30 Chicken, Boneless Breasts 175°F / 79°C 75% 60 Chicken Nuggets, Deep Fried 190°F / 88°C NONE REQUIRED 25 Chicken, Pre-Cooked Grilled
Boneless Patties Coffee Cakes 170°F / 77°C MINIMAL 60 Cookies 175°F / 79°C NONE REQUIRED 90 Crab Legs 160°F / 71°C 80% 45 Croissants 170°F / 77°C 30% 45 Eggs 160°F / 71°C 90% 45 Fish, Deep-Fried 170°F / 77°C NONE REQUIRED 30 Fish, Baked 155°F / 68°C 80% 45 Fish, Broiled 155°F / 68°C 70% 45 French Toast 165°F / 74°C 30% 60 Gravies / Sauces 170°F / 77°C 85% 45 Hamburgers / Ground Meat Patties 180°F / 82°C 55% 45 Hot Dogs 180°F / 82°C 70% 90 Muffins 170°F / 77°C 20% 60 Omelets 160°F / 71°C 90% 30 Pancakes 180°F / 82°C 60% 30 Pasta 175°F / 79°C 75% 60 Pastries 165°F / 74°C 20% 30 Pizza (uncovered) 180°F / 82°C 10% 30 Pizza (boxed) 180°F / 82°C NONE REQUIRED 60 Poppers, Deep Fried 190°F / 88°C NONE REQUIRED 25 Poultry, Whole, bone-in 175°F / 79°C 55% 60 Poultry, Cut-up, bone-in 175°F / 79°C 75% 60 Ribs 175°F / 79°C 60% 90 Rice 175°F / 79°C 70% 30 Roasts / Bone-in Meats 165°F / 74°C 60% 90 Sausage 180°F / 82°C 50% 90 Shrimp / Shellfish 150°F / 66°C 80% 60 Soups (broth) 185°F / 85°C NONE REQUIRED 90 Tortillas (soft) 180°F / 82°C 70% 60 Vegetables 175°F / 79°C 70% 45
SET TEMPERA-
TURE
(°F /°C)
150°F / 66°C 55% 90
RELATIVE HUMIDITY % MAXIMUM
(MINUTES)
TIME
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DAILY CLEANING PROCEDURES
CAUTION:
ELECTRIC SHOCK HAZARD
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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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
18600-0046 Hi limit-300°F; water and air
18600-0137 Humidity stat 18600-0129 Thermostat
18601-1171 Red power indicator light
18602-0289 ON/OFF Switch 18603-0037 Fan motor
18603-5017 Fan blade (for motor 18603-0037)
18603-5021 Motor cooling fan
18605-0016 Power cord with NEMA 5-15P plug
16505-7080 Drip pan
18314-0040 Stainless steel water reservoir pan
18612-0151 Heat element 350 W (water reservoir) 18612-0425 Heat element 1300 W (air)
18616-0014 Dial thermometer 18616-9998 Cord grip 29034-0282 Silicone 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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WIRING DIAGRAM
HTU12 WITH ANALOG CONTROL
120 VOLT, 1700 WATT, 14.2 AMP, 1 PH, 60 HZ
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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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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.
Carter-Hoffmann
1551 McCormick Ave.
Mundelein, Illinois, 60060 USA
Phone: 847-362-5500 Toll free: 800-323-9793 Fax: 847-367-8981
Sales and Marketing E-mail: sales@carter-hoffmann.com
Service E-mail: technicalservice@carter-hoffmann.com
Company Website: www.carter-hoffmann.com
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