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IMPORTANT: 

Cabinet AC power re-
quires a 15 amp electri-
cal circuit with NEMA 5-

20R receptacle.  DO NOT use a 
receptacle that is not rated and 
grounded for 20 amp service and 
do not use an extension cord.  Veri-
fy electrical specifications on the 
serial tag located on the cabinet. 

DAILY OPERATION 

CAUTION:  SAFE 
FOOD HOLDING 
PRACTICES   
RECOMMENDED 

Cooking food to a safe tempera-
ture, holding at a temperature of at 
least 140°F is critical in the preven-
tion of foodborne illness. Hold only 
cooked, hot food at 140°F or high-
er.  This cabinet is not intended to 
cook or reheat food. Food must be 
at appropriate temperature before 
being placed into cabinet. 

Battery charge level 

(displays % or hours 

remaining) 

Power Button 

Up and Down Arrow 

buttons to set temperature 

Battery Button: press to 

display % or time remaining 

on battery charge 

Set/Actual Temperature 

Button; press to view actual 

temperature 

Temperature  display 

TO DIM THE DISPLAY  

Press and hold the Battery 

Button and push the DOWN ARROW until desired 
level of brightness is displayed. 

TO BRIGHTEN THE DISPLAY  

Press and hold the 

Battery Button and press the UP ARROW until the 
desired level of brightness is displayed. 

1)  With the unit turned “Off”, plug the power cord into an AC 

socket. 

2)  Press the Power Button located on the front of the control 

board to turn the unit “On”. 

3)  Using Up and Down Arrows, set cabinet desired temperature. 

NOTE: Display will show cabinet temperature setting. Press 
the Temperature Button to view the actual cabinet tempera-
ture. 

4)  The display will show “PrE” until the unit has reached the de-

sired set point.  Pre-heat to desired temperature (see preheat 
times and temperatures for each model in box to the left). 
When preheat is complete, it will display the set temperature. 

5)  The actual temperature of the food compartment can be seen 

by pressing the Set/Actual Button once.  

6)  Load product into the cabinet, starting from the bottom up. 

7)  To disconnect from AC wall power and go to DC battery pow-

er for transport, turn off cabinet, unplug from AC and then turn 
the cabinet back on.  It will now run on battery power.  Run 
time will be about 4 hours on a full battery charge. 

8)  When removing product from the cart, start at the bottom and 

work to the top position.  This keeps food hotter and elimi-
nates spillage onto lower items. 

9)  Once the battery requires charging or the user wants to begin 

charging the battery again, the unit should first be turned “Off” 
then plugged into the wall socket.  The unit can then be left 
“Off” to charge more quickly or it can be turned “On” again to 
maintain active temperature and charge the battery which will 
take more time. 

10) It is recommended that the unit be fully charged before un-

plugging and running on battery to maximize the life of the 
battery over time. 

PREHEAT TIMES &  
TEMPERATURES  

 

GTH7

: preheat to 160°F (71° C)  in 

25 minutes; 180°F (82°C) in 40 
minutes; 200°F (93°C) in 50 
minutes.  

 

GTH12: 

preheat to 160°F (71° C) 

in approximately 50 minutes; 180°
F in 60 minutes (82°C); 200°F (93°
C) in 80 minutes.  

Summary of Contents for GTH12

Page 1: ...ation Instructions are read and followed Damage to the appliance may occur if these in structions are not followed This manual is considered to be a permanent part of this appliance This manual must r...

Page 2: ...or its agents When battery reaches 0 it is no longer safe to hold potentially hazardous foods Cleanliness of this appliance is essential to good sanitation Read and follow all included cleaning instru...

Page 3: ...the skin wash immediately and thoroughly If electrolyte enters the eyes also seek medical attention Neutralize spilled electrolyte with a solution of 1 lb bicarbonate of soda baking soda to one gallo...

Page 4: ...rsal tray slides Fully adjustable at 1 3 4 spacing Standard spacing at 3 1 2 centers HEATING SYSTEM Top mounted blower heater for even heat distribution High efficiency DC motor with cooling fans Full...

Page 5: ...r the appliance is properly grounded Unpack the cart and heating unit Ensure that all packing materials and protective plastic has been removed from the unit Inspect all components for completeness an...

Page 6: ...ZARD Allow the unit to cool before performing any cleaning or maintenance procedures WARNING ELECTRIC SHOCK HAZARD DO NOT spray or splash water on the heater con trol panel timer or wiring IMPORTANT C...

Page 7: ...y will show cabinet temperature setting Press the Temperature Button to view the actual cabinet tempera ture 4 The display will show PrE until the unit has reached the de sired set point Pre heat to d...

Page 8: ...cants for stainless steel products Do not use oil PERIMETER BUMPERS Vinyl which has been dislodged from the channel due to severe bumping or scraping can be pried back into place with a common screwdr...

Page 9: ...Fig 1 on the left and right sides of the battery tray towards the center of the cart Twist the knobs one quarter turn until they remain in the out unlocked position 4 Pull the battery tray away from t...

Page 10: ...y tray towards the center of the cart Twist the knobs one quar ter turn until they remain in the out unlocked position Fig 1 4 Pull the battery tray away from the cart using the formed met al handle i...

Page 11: ...ORE PERFORMING THESE PROCEDURES CABINET MUST BE COOL AND ALL FOOD MUST BE RE MOVED INSTALLATION CONTINUED 12 Next twist the knobs one quarter turn until they release from the out unlocked position Fig...

Page 12: ...20 Plug 18607 0019 Terminal Block 6 pos 603 18612 0162 Hoop Element 1 400W 18612 0163 Hoop Element 2 400W 18614 0272 Fan Guard SC120 W15 18614 0275 Fan Guard SC80 W2 18614 0303 Muffin Fan 24VDC 26 CFM...

Page 13: ...WIRING SCHEMATIC 13...

Page 14: ...y Replace both batteries Damaged wiring Repair wiring Damaged relay Replace relay Damaged controller Replace controller Damaged heating element Perform ohm reading Replace element Unit overheats Setpo...

Page 15: ...he equipment in accordance with the procedures described in the Operation Manual 6 Carter Hoffmann is NOT responsible for any loss of the customer s income loss of food product extra labor charges or...

Page 16: ...ter 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 Th...

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