RTB Series RETHERMALIZATION CABINETS
MODELS: RTB10, RTB16, RTB34, RTB341, RTB281
OWNERS / OPERATORS MANUAL MANUFACTURED BY:
CARTER-HOFFMANN
1551 McCormick Avenue
Mundelein, IL 60060 USA

RTB10 Rethermalization Cabinets

Phone: 847-362-5500
Toll Free: 800-323-9793
Fax: 847-367-8981
Email: service@carter-hoffmann.com
READ THIS MANUAL COMPLETELY
BEFORE OPERATING THIS APPLIANCE
IMPORTANT: DO NOT DISCARD THIS MANUAL
This manual is considered to be part of the appliance and is to be given to the OWNER, MANAGER, or to the person responsible for training operators of this appliance.
THIS MANUAL IS TO BE UNDERSTOOD BY ALL PERSONS USING OR INSTALLING THIS APPLIANCE.
Contact Carter-Hoffmann if you have questions regarding installation, operation or maintenance of this equipment.

SAFETY PRECAUTIONS

WARNING: ELECTRIC SHOCK HAZARD
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.

IMPORTANT SAFETY INSTRUCTIONS

When using electrical appliances basic safety precautions should be followed, 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 outlet.

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. This equipment is intended for use in commercial establishments only.
   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 this appliance outdoors. DO NOT use this product near water – for example, near a kitchen sink, in a wet basement, or near a swimming pool, or similar environment.

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.

NOTE: This equipment has been designed and manufactured to meet all applicable health and safety codes and will give years of dependable service if used properly. All cabinets should be thoroughly cleaned before using.
NOTE: The technical content of this manual, including any wiring diagrams, schematics, parts breakdown illustrations and/or adjustment procedures, is intended for use by qualified technical personnel and is subject to change without notice.

INTRODUCTION

Carter-Hoffmann Series RTB Rethermalization cabinets are designed to uniformly rethermalize individually pre-packaged menu items or individual meal trays in baskets.
This equipment manual will provide you with basic information to safely install and operate this piece of equipment. Should you encounter any difficulties, have any questions, or require any assistance, please contact Carter-Hoffmann’s Technical Service department directly, at:
Telephone 800-323-9793 (toll-free) 847-362-5500
Fax 847-367-8981
Email service@carter-hoffmann.com.
PRODUCT SPECIFICATIONS

Model Number| *Basket Capacity
13-3/8” x 25-7/8”| Basket Spacing| Inside Working Height in (mm)| Overall Dimensions Height Depth Width in (mm)| Caster Diameter in (mm)| Class 100 Shipping Weight lbs (kg)**
---|---|---|---|---|---|---
RTB10| 10| 3
(76)| 14-5/8
(371)| 39-1/4 35 33-1/8
(997) (889) (842)| 5
(127)| 270
(123)
RTB16| 16| 3
(76)| 23-5/8
(600)| 48-1/4 35 33-1/8
(1226) (889) (842)| 5
(127)| 400
(181)
RTB34| 34| 3
(76)| 53-3/8
(1356)| 77-3/4 35 33-1/8
(1975) (889) (842)| 5
(127)| 525
(238)
RTB341| 32
(on roll-in dolly)| 3
(76)| 58
(1473)| 78-1/2 35-5/8 35-3/8
(1994) (905) (899)| On legs| 500
(227)
RTB281| 28
(on roll-in dolly)| Baskets nest| 34-7/16
(875(| 53-3/16 36-1/4  35-7/16
(1351) (921) (900)| N/A| 450
(205)

Construction…All Stainless steel double panel insulated cabinet with tamper resistant fasteners, heavy-duty strap hinges. Heavy-duty edge-mount latch with magnetic catch. High temperature silicone gasket mounted to cabinet.
Controller…microprocessor-based controller allows the user to program and store up to ten pre-set retherm menu cycles. Each menu contains four retherm/hold cycles. Each cycle can be easily programmed for a unique time and temperature to optimize performance of the heating system. Once a menu is programmed, the cycle is stored in the controller’s memory until a change is made.
Heating System…Heavy-duty stainless steel construction. Secured in-place with tamper resistant fasters;
removable with tools. Inconel-sheathed heating elements, dual cooling fans and thermally protected blower motor with long-life bearings. Precision engineered interior cabinet baffle system.
Performance… Capable of heating from 70°F (21°C) to 200°F (90C) in 5 minutes with a differential of ± 2.5°F.
Recovery from 120°F (49°C) to 200°F (90°C) in one minute (performance based on empty cabinet)
**Electrical Specifications***

• Electrical specifications shown are typical for standard cabinets. Due to the often customized nature of this product line, i.e. cabinets built to consultant’s/ facility specifications, the electrical specifications on your particular cabinet may be different. Consult serial tag on rear of heating unit for electrical info.

UNPACKING, INSPECTION & INSTALLATION

This appliance should be thoroughly cleaned prior to use.
See the CLEANING INSTRUCTIONS in this manual.
NOTE: DO NOT discard the carton or other packing materials until you have inspected the appliance for hidden damage and checked it for proper operation. Refer to FREIGHT DAMAGE CLAIM PROCEDURE BELOW

1. Remove the cabinet from shipping carton, ensuring that all packing materials and protective plastic has been removed from the unit.
2. Inspect all components for completeness and condition.
3. If any freight damage is present, a freight claim must be filed im-mediately with the shipping company.
4. Freight damage is not covered under warranty.
5. Check to insure all components are included: cabinet, instruction packet and additional accessories.
6. Read operation instructions completely.
7. Appliance should be thoroughly cleaned before use. See CLEAN-ING INSTRUCTIONS in this manual.

FREIGHT DAMAGE PROCEDURE
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 transportation 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 until the merchandise is unpacked, notify 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.
INSTALLATION LOCATION
For proper operation and maximum performance, locate the unit in an ambient air temperature of 70ºF (21ºC). For safe operation and maximum performance, locate the unit at least 4” from any wall or combustible material.
Avoid placement in areas near exhaust fans or where there are active air movements.
Do not locate this unit under an overhead ventilation system or close to other cooking equipment.
Fumes and grease particles can be drawn by the cooling fans into the control compartment of the heater which should be avoided in order to assure top performance and longer life.
Unit must be on a solid level surface.

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: See page 3 for power requirements If necessary, contact a licensed electrician to install an appropriate electrical circuit with correct receptacle. Electrical requirements vary by model number. Consult serial tag on rear of heating unit for proper electrical specifications.
DO NOT use an extension cord.
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.
IMPORTANT:
Not under warranty
Damage to unit due to being connected to the wrong voltage or phase is NOT covered by warranty.
WARNING:
Risk of personal injury
Unit is not waterproof, to avoid electrical shock, keep unit from be-ing submerged in water. Do not operate if unit has been in contact with water.

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.
To prevent an electrical shock hazard between the appliance and other appliances or metal parts in close vicinity, an equalization-bonding stud is provided. An equalization bonding lead must be connected to this stud and the other appliances/metal parts to provide sufficient protection against potential difference. The terminal is marked with the following symbol: START UP

1. Prior to use, thoroughly clean the interior of the cabinet, according to the instructions in this manual. Familiarize yourself with the controls.
2. Plug the power cord of the cabinet into a grounded outlet with a electrical service according to the electrical information provided on the serial tag located on the rear of the cabinet heating unit. DO NOT MODIFY CORD PLUG.
3. Set POWER switch to the “ON” position.
4. 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.
5. Heat rethermalizer at 315° F for 35 minutes by pressing Product Key number ten. The heat will remove any residual oils which may adhere to inside metal surfaces. To cool down unit, press Product Key #10 again to turn off cycle and open doors for about 15 minutes. A slight emission of smoke is normal for the first few hours of operation.
6. Rethermalizer is ready for custom programming, if desired. See pages 9-20 for instructions.

CONTROLLER FEATURES

On/Off rocker switch: located to the left of the control panel (not shown). Switch will illuminate when cabinet is turned on.

FEATURE DETAILS
Fahrenheit of Celsius Temperature Display: the controller can be configured to display the temperature in degrees Fahrenheit or Celsius; accessible through the system program mode.
Programmable Hold Times: Product Key hold times can be programmed to track product quality through a specified holding period. Hold time countdown begins as soon as the cook cycle is complete. The controller will sound an alarm when the product’s hold time has expired, alerting the operator to discard the product.
CONTROLLER FEATURE DETAILS Four-Stage Programming: each Product Key can be programmed to personalize your cooking system with up to four cooking temperatures and up to ten cook times for a single cook cycle. With each Product Key, you can select a menu, start and stop a menu, scroll through programmed data (in Program Mode).
Programmable Stage Temperatures: cook temperatures for each stage on each Product Key can be programmed. The temperature range is 200°F to 350°F (93.3°C to 172°C) Programmable Stage Times: cook times for each Product Key can be programmed.
The controller is programmable in minutes (up to 99) and seconds (up to 59) and allows up to ten stages per Product Key. Note: multiple cook starts are not allowed if a product key has more than one stage programmed.
Programmable Fast.Flex™ Timing Mode: flex or straight timing can be configured for each stage on each Product Key. To insure consistent, high-quality food product, flex time will ad-just the actual cook time, taking into consideration the temperature variation due to load size, initial product temperature, product moisture content, and other factors affecting the cook cycle.
If cooking by straight time, the controller will cook only for the specified time without adjusting for these variances.

DAILY OPERATION

WARNING:
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 range:
Temperature: 200ºF-350ºF (93.3°C to 172°C)
Time: up to 99 minutes, 59 seconds, for each stage on the Product Key
CONTROLLER OPERATING ENVIRONMENT
The solid state components in the controller are designed to operate reliably in a temperature range up to 158°F (70°C). Before installing, verify that the ambient temperature where this product is located does not exceed this temperature.
NOTE: To review and/or program time and temperature settings for each Product Key, refer to Programming Instructions on pages 10-20.
*NOTE: FAST.FLEX™ Timing Mode may assist you with variable product features such as temperature and load; see page 16 for programming instructions.

When cabinet is turned on, controller will default to Product Key 1, indicated by illuminated indicator light. The display will read “LOW”.

1. Turn power switch ON.
2. Load Product: For best retherm times, product must be thawed or slacked prior to loading. Chilled or frozen food will extend retherm time substantially*. Load baskets of food, beginning at the bottom of the cabinet and working up. If retherming less than a full load, arrange baskets so they are located on the center shelves; this will ensure best air circulation and even heating around the food.
3. Start a Cook Cycle: Press desired Product Key (1 through 10 to start a cook cycle. If the key is programmed, the correct cooking time will be displayed and will immediately start to count down in minutes and seconds. “DONE” will display when the cook cycle has ended. Product is ready to be removed, but may stay in the cabinet in Hold Mode until served.
4. Respond to DONE Alarm: DONE alarm will sound at the end of a completed cycle. Cancel the signal by pressing the same Product Key used to start the cook cycle.
5. Stop a Cook Cycle: Press and hold an active Product Key for 3 seconds. Timing will stop.
6. Holding Cycle: If the controller is programmed with holding times, they will automatically start counting upon expiration of the cooking cycle. When there are active hold times the HOLD indicator light will be lit.
   To view all active hold times, press and hold the HOLD Key.
   Upon expiration, the timer will display “HOLD” and pulse with an audible tone. To cancel, press the HOLD Key.

Operating range:
Temperature: 200ºF-350ºF (93.3°C to 172°C)
Time: up to 99 minutes, 59 seconds, for each stage on the Product Key
CONTROLLER OPERATING ENVIRONMENT
The solid state components in the controller are designed to operate reliably in a temperature range up to 158°F (70°C). Before installing, verify that the ambient temperature where this product is located does not exceed this temperature.

CONTROLLER PROGRAMMING INSTRUCTIONS

Operation Mode: When the power is turned “ON”, the controller will read LOW and the temperature of the cabinet displayed in °F or °C. From the operation mode, a menu can be started by pressing the appropriate Product Key. Note: the fan will be ON in the operation mode.
NOTE: To view actual cabinet temperature, press the TEMP TOGL CLEAR button. Press the button again to exit.
Controller Programming: Retherm cabinets may or may not have been pre- programmed by the factory to end user specifications.
If the factory has pre-programmed the controller, it should be reviewed to ensure proper set-points prior to use.
If the controller has not been pre-programmed by the factory, it will be programmed to the default menu settings listed on the chart below.
If programming is needed, follow the Controller Programming Instructions on pages 10 through 20. Use the programming worksheet provided below to aid your controller programming.
Pre-Programmed Default Menu Settings

Control Display| Product Key Description| Product Key 1| Product Key 2| Product Key 3| Product Key 4| Product Key 5| Product Key 6| Product Key 7| Product Key 8| Product Key 9| Product Key 10
---|---|---|---|---|---|---|---|---|---|---|---
Time 0| Preheat Time| 20| 25| 30| 35| 20| 25| 30| 35| 20| 25
Preheat| Preheat Set Point| 200| 210| 220| 230| 240| 250| 265| 285| 300| 315
Time 1| Cook 1 Time| 20| 15| 10| 5| 20| 15| 10| 5| 20| 15
Temp 1| Cook 1 Set Point| 180| 185| 190| 195| 200| 215| 230| 250| 275| 300
Time 2| Cook 2 Time| 20| 15| 10| 5| 20| 15| 10| 5| 20| 15
Temp 2| Cook 2 Set Point| 190| 200| 210| 220| 230| 240| 250| 280| 285| 305
Time 3| Hold Time| 30| 30| 30| 30| 30| 30| 30| 30| 30| 30
Hold| Hold Set Point| 170| 170| 170| 170| 170| 170| 170| 170| 170| 170

Controller Programming Worksheet

Control Display| Product Key Description| Product 1| Product 2| Product 3| Product 4| Product 5| Product 6| Product 7| Product 8| Product 9| Product 10
---|---|---|---|---|---|---|---|---|---|---|---
Time 0| Preheat Time| | | | | | | | | |
Preheat| Preheat Set Point| | | | | | | | | |
Time 1| Cook 1 Time| | | | | | | | | |
Temp 1| Cook 1 Set Point| | | | | | | | | |
Time 2| Cook 2 Time| | | | | | | | | |
Temp 2| Cook 2 Set Point| | | | | | | | | |
Time 3| Hold Time| | | | | | | | | |
Hold| Hold Set Point| | | | | | | | | |

Operating range:
Temperature: 200ºF-350ºF (93.3°C to 172°C)
Time: up to 99 minutes, 59 seconds, for each stage on the Product Key
Programming Levels The controller is equipped with two levels of programming access:
End User Programming Path 1724 allows the end user to program Menu Settings. Daily users of this cabinet should be familiar with all aspects of Program Mode 1724. See pages 11-13 for Program Mode 1724 instructions.
Manager Programming Path 3228 allows the user to program parameters such as Machine Type, Duct Temperature, Fahrenheit/Celcius, Temperature Minimum and Maximum and Set Point Differential. It is advised that access to Program Mode 3228 be known only to owners/operators and not daily users of the product. See pages 14-20 for Program Mode 3228 instructions. Operating range:
Temperature: 200ºF-350ºF (93.3°C to 172°C)
Time: up to 99 minutes, 59 seconds, for each stage on the Product Key PROGRAMMING NOTES
Pressing the DOWN ARROW will scroll through the entire sequence.
If you wish to go back to a particular parameter, press the UP ARROW until the desired setting is reached.
To EXIT the Programming Mode, scroll through the programming choices until the display reads “SYSTEM”.
Press UP ARROW.
The display will read “EXIT”. Press “P” and you will return to the Operating Mode.
If you discontinue programming and leave the controller idle, it will automatically exit the Programming Mode after two minutes.

END-USER PROGRAMMING PATH 1724 **

**

Program Path 1724 allows the end user to program up to ten Menu Settings, one for each Product Key. Each Product Key can be programmed for 4 stages in the Cook Cycle. This allows the user to vary the time and temperature in each stage throughout the cooking cycle to  achieve best product quality. Stage 1: Pre-heat time
Pre-heat setpoint (Temperature setting)
Stage 2: Cook 1 Time
Cook 1 Setpoint (Temperature setting)
Stage 3: Cook 2 Time
Cook 2 Setpoint (Temperature setting)
Stage 4: Hold Time
Hold Setpoint (Temperature setting)
When scrolling through the Program Mode, the sequence of programming will take you through programming all four program TIMES and then through all four program TEMPERATURES for the Product Key. The programming order scrolls as such:
TIME 0 (Pre-heat time)
TIME 1 (Cook 1 time)
TIME 2 (Cook 2 time)
TIME 3 (Hold time)
PREHEAT (Pre-heat temperature)
COOK 1 (Cook 1 temperature setpoint)
COOK 2 (Cook 2 temperature setpoint)
HOLD (Hold temperature setpoint)
Pressing the DOWN ARROW will scroll through the entire sequence. If you wish to go back to a particular time or temperature, press the UP ARROW until the desired setting is reached. Operating range:
Temperature: 200ºF-350ºF (93.3°C to 172°C)
Time: up to 99 minutes, 59 seconds, for each stage on the Product Key TIME PROGRAMMING INSTRUCTIONS
The display will read: “PROGRAM”
Enter code “1724” using the Product Keys. As you type in the numbers, they will appear as asterisks on the display.Then, press “P”
The display will read: “RECIPE” The display will read: “PRODUCT”
Select the Product Key (1 through 10) you wish to program by pressing the product key.The display will read: “TIME 0” (this is the PreHeat Time setting) and then it will display the current time that has been programmed.
Press the “TEMP TOGL CLEAR” key to clear the display; it will revert to “:00”Operating range:
Temperature: 200ºF-350ºF (93.3°C to 172°C)
Time: up to 99 minutes, 59 seconds, for each stage on the Product Key TEMPERATURE PROGRAMMING INSTRUCTIONS

Using the Product Keys, type in the time desired for the PREHEAT time in minutes and seconds, for example 25:30 is 25 minutes and 30 seconds. Use the

10 product key for the number 0. ![CARTER HOFFMANN RTB10 Rethermalization

Cabinets - INSTRUCTIONS 1](https://manuals.plus/wp-content/uploads/2024/02 /CARTER-HOFFMANN-RTB10-Rethermalization-Cabinets-INSTRUCTIONS-1.jpg)The display will read “PREHEAT” and then the currently programmed temperature for the preheat cycle (for example 250° F). Type in the desired temperature for the preheat cycle. Use the #10 product key for the number 0.Display will read “TEMP 1”, “TEMP 2”, and “HOLD” followed by the currently programmed temperature for each cycle.
Type in the desired temperature for each cycle as you scroll through them. Operating range:
Temperature: 200ºF-350ºF (93.3°C to 172°C)
Time: up to 99 minutes, 59 seconds, for each stage on the Product Key PROGRAMMING NOTES
Once in Programming Path 3228, pressing “DOWN ARROW” or “P” will scroll through the entire sequence of parameters. If you wish to go back to a particular parameter, press the UP ARROW until the desired setting is reached.
To EXIT the Programming Mode, scroll through the programming choices until the dis-play reads “SYSTEM”. Press UP ARROW. The display will read “EXIT”. Press “P” and you will return to the Operating Mode.
If you discontinue programming and leave the controller idle, it will automatically exit the Programming Mode after two minutes.

MANAGER PROGRAMMING PATH 3228

Program Path 3288 is a deeper level programming mode that should be used by the manager only. In most cases, this mode would be used infrequently, if at all. The sequence of parameters that may be programmed in Program Path 3228 is:
MACHINE (you will not ever need to change this parameter)
APPLIANC (you will not ever need to change this parameter)
GD BAND Allows changes to the heating duct temperature; maximum temperature is 400°F
TIMING Allows you program standard or FAST.FLEX™ timing mode
COOKUNIT Allows you to change the timing to hours and minutes, or minutes and seconds
TONE VOL Allows you to change the volume of the controller alarm
TEMP UNIT Allows you to change the temperature scale to Fahrenheit or Celsius
RANGE L 1 Allows you to change the lower programmable menu temperature; minimum 32°F
RANGE L 2 Allows you to change the upper programmable menu temperature; maximum 350°F
HYS 1 Allows you to set the lower temperature differential; this tells the machine when the temperature drops a certain number of degrees below the temperature setpoint to turn the heating element on. Preprogrammed differential is 5°; In most cases this is sufficient for effective machine performance
HYS 2 Allows you to set the upper temperature differential; this tells the machine when the temperature goes above the set point temperature to turn the heating element off. Preprogrammed differential is 5°; In most cases this is sufficient for effective machine performance
RANGEL 2 (you will not ever need to change this parameter)
RANGEH 2 (you will not ever need to change this parameter)
HYSL 2 (you will not ever need to change this parameter)
HYSH 2 (you will not ever need to change this parameter)
Operating range:
Temperature: 200ºF-350ºF (93.3°C to 172°C)
Time: up to 99 minutes, 59 seconds, for each stage on the Product Key *PROGRAMMING NOTE
You may also enter Programming Mode 1724 by scrolling to “RECIPE” from the “SYSTEM” screen using the DOWN ARROWbutton. You may then program the menu settings for Product Keys 1 through 10, according to the instructions on pages 12-13.
Scrolling past “RECIPE” at this level will take you to “DIAGNOST”, “OFFSET”, SCK ADDR” and “EXIT” in that order.
“DIAGNOST” “OFFSET” and “SCK ADDR” are to be used by service technicians only. Do not change any of the settings in these parameters.
To exit, scroll until the screen reads “EXIT” by using the UP or DOWN ARROW buttons, and then press “P”. Enter code “3228” using the Product Keys. As you type in the numbers, they will appear as asterisks on the display.

The display will read “APPLIANC”
Skip this program by pressing the DOWN ARROW buttonOperating range:
Temperature: 200ºF-350ºF (93.3°C to 172°C)
Time: up to 99 minutes, 59 seconds, for each stage on the Product Key ABOUT FAST.FLEX™ OR STRAIGHT TIMING MODE Flex or straight timing can be configured for each stage on each Product Key. The advantage of the FAST.FLEX mode is to insure consistent, high-quality food product. FAST.FLEX will adjust the actual cook time, taking into consideration the temperature variation due to load size, initial product temperature, product moisture content, and other factors affecting the cook cycle. However, using FAST.FLEX mode may alter the time expected to finish the cooking cycle. If cooking by straight time, the controller will cook only for the specified time without adjusting for these variances.
TO CHANGE THE HEATER DUCT TEMPERATURE, scroll using the DOWN ARROW until the display reads “GD BAND”
If you wish to change the heating duct temperature and the display will read the current duct temperature.
To change the temperature, press the TEMP TOGL CLEAR button. The display will read 0°F. Type in a the desired duct temperature using the Product Keys (use 10 for the number 0). The maximum number that may be entered is 400°F.After typing in your desired temperature, press “P” to return to the main 3228 Program Sequence. The display will read “TIMING”.
TO CHANGE THE TIMING MODE, scroll by pressing DOWN ARROW until the display reads “TIMING”
If you wish to change the timing from standard cooking mode to FAST.FLEX™ mode or vice versa When your desired timing appears on the display, press “P” to select and save your choice.
The display will read “COOKUNIT”
Operating range:
Temperature: 200ºF-350ºF (93.3°C to 172°C)
Time: up to 99 minutes, 59 seconds, for each stage on the Product Key PROGRAMMING NOTES
Once in Programming Path 3228, pressing “DOWN ARROW” or “P” will scroll through the entire sequence of parameters. If you wish to go back to a particular parameter, press the UP ARROW until the desired setting is reached.
To EXIT the Programming Mode, scroll through the programming choices until the dis- play reads “SYSTEM”. Press UP ARROW. The display will read “EXIT”. Press “P” and you will return to the Operating Mode.
If you discontinue programming and leave the controller idle, it will automatically exit the Programming Mode after two minutes.
TO CHANGE THE TIMER COUNTDOWN from minutes and seconds to hours and minutes or vice versa, scroll using the DOWN ARROW until the display reads “COOKUNIT” The display will read “TONE VOL”
TO CHANGE THE TONE VOLUME of the controller, scroll using the DOWN ARROW until the display reads “TONE VOL” ![CARTER HOFFMANN RTB10 Rethermalization Cabinets

• INSTRUCTIONS 16](https://manuals.plus/wp-content/uploads/2024/02/CARTER- HOFFMANN-RTB10-Rethermalization-Cabinets-INSTRUCTIONS-16.jpg)The display will read “TEMP UNIT”
  TO CHANGE THE TEMPERATURE SCALE of the controller from Fahrenheit to Celsius or vice versa, scroll using the DOWN ARROW until the display reads “TEMP UNIT” The display will read “RANGE L 1”
  Operating range:
  Temperature: 200ºF-350ºF (93.3°C to 172°C)
  Time: up to 99 minutes, 59 seconds, for each stage on the Product Key PROGRAMMING NOTES
  Once in Programming Path 3228, pressing “DOWN ARROW” or “P” will scroll through the entire sequence of parameters. If you wish to go back to a particular parameter, press the UP ARROW until the desired setting is reached.
  To EXIT the Programming Mode, scroll through the programming choices until the dis-play reads “SYSTEM”. Press UP ARROW. The display will read “EXIT”. Press “P” and you will return to the Operating Mode.
  If you discontinue programming and leave the controller idle, it will automatically exit the Programming Mode after two minutes.
  TO CHANGE THE LOW TEMPERATURE RANGE of the controller, scroll using the DOWN ARROW until the display reads “RANGEL 1” and then the currently stored LOW temperature setting (i.e. 32°F). Press “TEMP TOGL CLEAR” button to clear the temperature setting. The display will read “0°F”Using the Product Keys, type in the new desired LOW temperature setting (Use the number 10 for 0). NOTE: 32°F is the lowest possible setting that can be used.The display will read “RANGEH 1”
  TO CHANGE THE HIGH TEMPERATURE RANGE of the controller, scroll using the DOWN ARROW until the display reads “RANGEH 1” and then the currently stored HIGH temperature setting (i.e. 350°F). Press “TEMP TOGL CLEAR” button to clear the temperature setting. The display will read “0°F”Using the Product Keys, type in the new desired HIGH temperature setting (Use the number 10 for 0). NOTE: 350°F is the highest possible setting that can be used.Operating range:
  Temperature: 200ºF-350ºF (93.3°C to 172°C)
  Time: up to 99 minutes, 59 seconds, for each stage on the Product Key PROGRAMMING NOTES
  Once in Programming Path 3228, pressing “DOWN ARROW” or “P” will scroll through the entire sequence of parameters. If you wish to go back to a particular parameter, press the UP ARROW until the desired setting is reached.
  To EXIT the Programming Mode, scroll through the programming choices by pressing “P” until the display reads “SYSTEM”. Press UP ARROW.
  The display will read “EXIT”.
  Press “P” and you will return to the Operating Mode.
  If you discontinue programming and leave the controller idle, it will automatically exit the Programming Mode after two minutes.
  TO CHANGE THE LOWER TEMPERATURE DIFFERENTIAL of the controller, scroll using the DOWN ARROW until the display reads “HYSL 1” and then the currently stored lower differential temperature setting (i.e. 5°F). Press “TEMP TOGL CLEAR” button to clear the temperature setting. The display will read “0°F”Using the Product Keys, type in the new desired low temperature setting (Use the number 10 for 0).The display will read “HYSH 1”
  TO CHANGE THE UPPER TEMPERATURE DIFFERENTIAL of the controller, scroll using the DOWN ARROW until the display reads “HYSH 1” and then the currently stored upper differential temperature setting (i.e. 5°F). Press “TEMP TOGL CLEAR” button to clear the temperature setting. The display will read “0°F”Using the Product Keys, type in the new desired upper temperature setting (Use the number 10 for 0).Operating range:
  Temperature: 200ºF-350ºF (93.3°C to 172°C)
  Time: up to 99 minutes, 59 seconds, for each stage on the Product Key PROGRAMMING NOTES
  Once in Programming Path 3228, pressing “DOWN ARROW” or “P” will scroll through the entire sequence of parameters. If you wish to go back to a particular parameter, press the UP ARROW until the desired setting is reached.
  To EXIT the Programming Mode, scroll through the programming choices until the dis-play reads “SYSTEM”. Press UP ARROW. The display will read “EXIT”. Press “P” and you will return to the Operating Mode.
  If you discontinue programming and leave the controller idle, it will automatically exit the Programming Mode after two minutes.
  It is not necessary to program the rest of the parameters in the sequence. They are:
  The display will read “RANGEL 2”
  Skip this parameter by pressing “P”
  The display will read “RANGEH 2”
  Skip this parameter by pressing “P”
  The display will read “HYSL 2”
  Skip this parameter by pressing “P”
  The display will read “HYSH 2”
  Skip this parameter by pressing “P”
  The controller will return to the beginning of the sequence and the display will read “MACHINE”
  To EXIT PROGRAMMING MODE 3228
  Scroll through the programming sequence using the DOWN
  ARROW or UP ARROW until the display reads “MACHINE” The controller is now out of Program Mode and in Operating Mode.
  The controller will also exit Programming Mode if left idle for more than two minutes.

DAILY CLEANING PROCEDURES

CAUTION:
ELECTRIC SHOCK HAZARD
Disconnect appliance from electric power before cleaning.
NOTE: When the power is turned off, the cooling fans will continue to operate until the heater compartment cools down. DO NOT unplug the cabinet until the cooling fans turn off.
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:
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 the side heat duct and rack assemblies. Simply lift up and pull out. They may be hand washed or run through an automatic washer. Clean the inside of the unit as well as the removed parts. Reinstall when all parts are dry and clean.

4. To clean stainless steel surfaces, use only cleansers, detergents, degreasers or sanitizers that are certified to be “chloride-free” and “phosphate-free.” Use these products only in recommended concentrations. DO NOT exceed recommended concentrations or
   mixing ratios. After cleaning and sanitizing, rinse all exposed surfaces thoroughly with large amounts of clean, clear water. Wipe off any standing liquid or residue from all surfaces, corners and near edges.

5. Inspect and clean the areas where there are vents or filters, making sure no water gets into the internal controls or electrical areas of the cabinet. CAUTION: When using solvents, it is essential that proper precautionary measure be observed.
   Refer to solvent manufacturer’s instructions. Use of direct steam/hot water at temperatures above 190°F may result in bubbling or loosening of the control panel.

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.
SEE NEXT PAGE FOR RECOMMENDED TIPS FOR CLEANING STAINLESS STEEL
CAUTION:
Never move cart unless all doors are securely closed. Serious damage to hinges and doors may result if bumped into tables, walls, or other equipment when doors are open.

CABINET MAINTENANCE
CASTERS
Your cabinet may be equipped with casters or legs. If your cabinet has casters they may be easily lubricated with a grease gun. Lubricate bearings at least once every six months. Lubrication will be required every one to two weeks if carts are cleaned with hot  ater or steam cleaning system. NOTE: Casters with special DelrinTM bearings are recommended for frequent cart wash with steam cleaning systems or high pressure hose.
LATCHES
Check frequently to insure that all door latches are secure.
Latches may become “sticky” due to residue buildup from daily use and cleaning procedures. Lubricate latches once every six months or when needed with WD40, silicone spray, graphite or other commercial lubricant for stainless steel products. Do not use oil.
HINGES
Your cart doors and hinges have been factory aligned to assure positive latching and smooth action. If doors are removed for cleaning, we recommend that they be put back on the same cart to assure the best possible alignment and operation.
DOORS
Never tip carts forward on open doors to drain water during or after washing. This can cause serious damage to hinges, doors and latches. RECOMMENDED TIPS FOR CLEANING STAINLESS STEEL

clear water and wipe dr
Smears/   Fingerprint| As needed| Stainless steel cleaner or similar products| Rub with soft cloth as directed on package.
Rub in direction of grain of stainless steel.
Do not use on vinyl trim.
Stubborn spots and stains| Daily as needed| Any chloride-free or phosphate- free cleaner| Apply with damp sponge or cloth. Rub in direction of grain of stainless steel.  Rinse thoroughly, especially if cleaner contains chlorine bleach,  do not use on vinyl trim.
Hard water spots|   Daily as needed| Vinegar| Swab with cloth.
Rinse with water and wipe dry.

TROUBLESHOOTING GUIDE

CABINET FAILS TO HEAT
(Start/Stop button pressed. Oven will not heat. Blower fan runs)| Door not fully closed| Close door again. Retry cooking cycle.
Incorrect cooking cycle| Retry cooking cycle
Inoperable component| Identify & replace failed part (s)
CABINET FAILS TO HEAT
(Heat indicator comes on. All other displays normal)| RF Interference| Verify RF leakage within limits
Faulty controller| Replace controller
CABINET FAILS TO HEAT
(Temperature lamp comes on. All other displays normal)| Hi-limit tripped| Reset hi-limit
Faulty heater relay| Replace relay
Faulty heat elements| Replace elements
OVEN NOT HEATING NORMALLY| Incorrect heating procedure| Check time setting
Wattage output too low| Check element
Defective capacitor| Check & replace if necessary
CONTROLLER INOPERATIVE OR ERRATIC| RF Interference| Verify RF leakage within limits
Faulty controller| Replace controller
Faulty controller transformer| Replace transformer
AIR TEMP PROBE FAILURE
(Air probe malfunctions)| Loose probe connection| Repair connections
Faulty air thermocouple| Replace air probe
NO SOUND| Inoperable speaker| Replace controller
BUTTON PROBLEM| Frozen key| Unplug controller. Hold down the TEMP TOGGLE/CLEAR key as you plug the controller back in
Inoperable key| Replace controller
READING WRONG TEMPERATURE| Defective temperature probe| Replace temperature probe
Display reads “PROBE”| Defective temperature probe| Replace probe
Probe not plugged in| Plug in probe

SERVICE EXPECTATIONS

Service Philosophy
For over fifty years, Carter-Hoffmann has enjoyed a reputation for manufacturing rugged, dependable foodservice equipment that permits foodservice professionals serve more food products to more people, and thus, to grow their business.
Our goal is not only to provide the best food service equipment for the price, but also to back it up with after-sale service that is responsive fast, efficient and professional. To ensure a clear understanding of our goals, expectations, and responsibilities, we have prepared this brief document
Carter-Hoffmann products are innovative and efficient. They are easy to use, easy to clean and easy to maintain. Although the products are quite reliable, when necessary they are also easy to repair.
We believe that a malfunction to a Carter-Hoffmann product should cause as little inconvenience to the customer as possible.
Our aim is to provide “same day”/first time fix” repair service on all of our products, whether in warranty or not.
We are dedicated to making every aspect of our customer service the standard by which others are judged.
End-User Responsibilities
While we all strive to serve our mutual customers as well as possible that does not mean that the end-user (including his employees) does not share some responsibilities.

1. All shipping damage must be noted on the freight bill when the shipment is received. Any freight damages must be col- lected from the Freight Company, NOT Carter-Hoffmann.
2. The end-user should be advised beforehand to carefully unpack and inspect all products when they are received BEFORE SIGNING THE SHIPPER’S RECEIPT OF DELIVERY.
3. The end-user must provide a safe, dry, level surface for the equipment to be placed upon.
4. The end-user must provide the proper electrical supply. All in-wall electrical modifications are to be completed by a li- censed electrician. All building modifications are the responsibility of the end-user.
5. The end-user must operate, clean and maintain the equipment in accordance with the procedures described in the Equipment Manual.
6. Carter-Hoffmann is NOT responsible for any loss of the customer’s income, loss of food product, extra labor charges, or any other incidental or consequential costs as a result of the malfunction of our product.
7. The end-user shall contact our authorized service provider only whenever service or repair to a Carter-Hoffmann product under warranty is required.
8. The end-user shall allow for on-premises repair of the equipment to be completed at a mutually convenient place and time.

Warranty Service

1. Warranty service is to be initiated by authorized Carter-Hoffmann personnel only.
2. The service provider is NOT authorized to change or extend any of the terms or conditions of our warranty.
3. Initial freight damage is NOT covered by the product warranty.

Confidentially

1. The end user and all his employees and sub-agents shall protect and keep confidential Carter-Hoffmann’s proprietary de- signs, information, and knowledge.
2. All materials provided by Carter-Hoffmann is to be considered confidential; it remains Carter-Hoffmann’s property; and is not to be reproduced without our prior approval

WARRANTY STATEMENT

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.
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 war- ranty 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 United 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 per- sons 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 are 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: service@carter-hoffmann.com
Company Website: www.carter-hoffmann.com

References

• Hoffmann
• Manual-Hub.com – Free PDF manuals!

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>