OWNER'S MANUAL

PRODUCT DESCRIPTION

The heated holding cabinet features Marshall's own ThermoGlo™ heating technology in conjunction with circulated air. Heat radiates from every square inch of the upper and lower flat plate heating surfaces, eliminating the need for intricate calrod, wire, and reflector assemblies.

This DH5D Heated Holding Unit series can accommodate one full pan, two half pans, or three 1/3 pans per drawer.

It also features integrated time/temperature controllers that independently control the top and bottom temperatures. Each drawer has one timer channel for full control flexibility and maximum product integrity.

These Heated Holding Units offer advanced technological design for optimal holding characteristics in a system that is simple to operate.

GENERAL SPECIFICATIONS

• Height: 11.875"
• Width: 29.000"
• Depth: 30.500"
• Weight: 145 lbs
• # of drawers: 2
• # of full pans: 2 (1 per drawer)
• # of half pans: 4 (2 per drawer)
• # of 1/3 pans: 6 (3 per drawer)
• Electrical: 17.8 A @ 120 V
• Cord: 37" long with NEMA 5-20 plug
• Approvals: NSF, ETL/CETL
• Patent: Pending

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

French Warning: AVERTISSEMENT: Ne pas entreposer ni utiliser de l'essence ni d'autres vapeurs ou liquides inflammables dans le voisinage de cet appareil, ni de tout autre appareil.

WARNING: IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, OR MAINTENANCE CAN CAUSE PROPERTY DAMAGE, INJURY OR DEATH. READ THE INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR SERVICING THIS EQUIPMENT.

French Warning: AVERTISSEMENT: Une installation, un ajustement, une altération, un service ou un entretien non conforme aux normes peut causer des dommages à la propriété, des blessures ou la mort. Lisez attentivement les directives d'installation et d'opération et d'entretien avant de faire l'installation ou l'entretien de cet équipement.

KEEP THIS MANUAL IN A SAFE PLACE AND RETAIN FOR FUTURE USE.

The cabinet area must be kept free of combustible materials and the flow of ventilation air must not be obstructed. Operating personnel must not perform any maintenance or repair functions. Contact your Qualified Service Company.

Clean unit and base with a damp cloth/rag and a mild cleaner.

DO NOT USE A GREEN SCOTCH BRITE PAD OR ANY OTHER ABRASIVE CLEANING PAD. THE BLUE SCOTCH BRITE (NO SCRATCH) IS SAFE TO USE.

DO NOT USE CAUSTIC CLEANING SOLUTIONS SUCH AS OVEN CLEANER. USE ONLY MILD, NON-ABRASIVE CLEANER.

DO NOT IMMERSE IN WATER! ⚠️

INSTALLATION

PRE-INSTALLATION

1. The heated holding cabinet is packaged to minimize the risk of shipping damage. Immediately upon receipt, inspect the unit(s) for damage. FILE ALL CLAIMS WITH THE FREIGHT CARRIER.
2. Unpack and inspect the cabinet. IF ANY CONCEALED DAMAGE, FILE ALL CLAIMS WITH THE FREIGHT CARRIER.

FINAL INSTALLATION

1. Unpack unit and remove all protective paper or plastic covering from metal parts.
2. Place holding unit on a stable base.
3. Ensure that the rolling drawers are in place and moving freely.
   Drawer Insertion: To insert a drawer, place the back of the drawer against the front inside top of the heating area. Tilt the drawer up and push it to engage the left and right channels into the unit's top rollers. Then, tilt the drawer down and gently push it in until it moves freely in and out. ➡️
4. Plug the unit into a receptacle rated according to the model being used. Refer to the General Specifications on the front page of the manual to find out the amp load and plug type of your model.
5. Installation shall comply with the latest version of the National Electrical Code, NFPA 70.

CONTROL USER INTERFACE

The user interface layout of the controller for the DH5D2-6BAC series is designed for ease of operation. While the number of controllers and/or timer channels may differ depending on the model, the operation is essentially the same for all models.

OPERATION

CONTROLLER POWER UP

1. Turn on the power switch. Upon power up, the controller will briefly show the software version and then go to preheat mode, displaying "PHt".

PREHEAT

1. The controller remains in preheat mode ("PHt") for the entire preheat period, even if heaters reach set points early. If the controller is turned OFF and back ON, the preheat period can be bypassed by a 3-second press of the down arrow button, provided both heaters are within the allowed differential temperature set points.
2. After preheat, the controller enters idle mode, displaying "---" or a product code name (e.g., "Chn") if assigned. Any timer can be started from this mode.

HOLDING TIME CYCLES

1. To start a cycle, press a timer start/stop button. The corresponding LED bars will light steady green. Pressing the down arrow button will show the remaining holding time for active channels for three seconds. If no product code is assigned, the display shows the holding time in minutes and starts countdown.
2. When the timer reaches the pre-alert value, the display flashes "drP" (DROP), LED bars flash, and a beep starts. Acknowledge the pre-alert by pressing the timer start/stop button. The display then shows the remaining time, LED bars return to steady, and the beeping stops.
3. When the timer reaches "000", the display flashes "000", LED bars flash red, and a beep starts until acknowledged by pressing the timer start/stop button. The timer returns to idle mode, LEDs turn OFF, and beeping stops.
4. (Interdependent Group Configuration Only) If a subsequent timer cycle starts while previous ones are active, LED bars turn steady red. They turn green only when all previously started linked cycles have elapsed or been cancelled, indicating the pan can now be used.
5. Any holding cycle can be cancelled by a double press of the timer start/stop button. This can be configured to a single press or press and hold.

CURRENT TEMPERATURES DISPLAY

1. To view the top heater's current temperature, press and hold the temperature button for 3 seconds. The display alternates between "toP" and its current temperature.
2. To view the bottom heater's current temperature, press the temperature button again. The display alternates between "bot" and its current temperature.
3. Pressing the temperature button cycles between top and bottom current temperatures.
4. To exit temperature view mode, press and hold the temperature button.

DAY PART CONFIGURATION

This feature allows switching between four sets of configurations (day part 1 through 4) to hold different food products or accommodate daily needs.

• To display the active day part configuration: Cancel all timers (displays show "---"), then press and release the up arrow button.
• To switch configurations: Cancel all timers, then press and hold the up arrow button for 3 seconds. The display cycles through configurations. Release the button when the desired day part is shown. If temperature set points change, "Hi" or "Lo" alerts may appear until temperatures stabilize.

PROGRAMMING - HOLDING TIME

1. To change a timer channel's holding time, the unit must be in preheat mode ("PHt") or idle mode ("---").
2. Press and hold the timer start/stop button for the channel for 3 seconds. The display flashes the current setting in minutes.
3. Use the up/down arrow buttons to change the setting.
4. Press and hold the start/stop button for 3 seconds to save the new setting and return to idle mode.
5. Repeat for other channels if necessary.

PROGRAMMING – GENERAL SETTINGS

NOTE: Programming mode can only be accessed from the front controller (master) on a pass-thru unit with controllers on both sides. The controller must be in "PHt" mode or idle mode with no active timers.

To access programming mode, press and hold the up and down arrow buttons for 5 seconds. To save changes and exit, press and hold the temperature button for 3 seconds.

In programming mode, the display alternates between parameter codes and their current values. Press the temperature button to cycle through parameters and use up/down arrows to change values. For channel-specific parameters (4, 5, 6), select the channel first using its timer button, then use up/down arrows to edit.

Programmable Parameters:

• "CF": Configuration download functionality. See "USB CONFIGURATION DOWNLOAD" section.
• "dPn": Selects which day part values will be edited (dP1, dP2, dP3, dP4).
• "grP" (Group Configuration):
  • "0": All channels are independent.
  • "1": All channels are interdependent. LED bars indicate the order of pan insertion (green for first, red for subsequent).
  • "2": Allows pairing of adjacent timer channels to track oldest product when two pans hold the same item. See "Par" parameter.
• "Par" (Pairing Parameter): Used when "grP" is set to "2" to define pairing between two channels. Select channel, then choose pairing option (e.g., "no", "uP", "rt", "dn", "LF").
• Product Name: Assign a product name to each channel. If activated, the name displays instead of holding time. Select channel, then use arrows to change characters.
• "Prd": Defines which channels activate the product name feature. Choose "yes" to display product name or "no" to display holding time. Pressing the down arrow during normal operation shows remaining holding time for 3 seconds.
• "ALt": Drop time expressed as a percentage of holding time.
• "CnC" (Timer Cancel Mode):
  • "1": Single press of channel button.
  • "2": Double press of channel button.
  • "HLd": Press and hold of channel button.
• "toP": Top heater temperature set point (°F or °C).
• "bot": Bottom heater temperature set point (°F or °C).
• "PHt": Preheat time (minutes).
• "bPS": Preheat bypass temperature differential (°F or °C).

USB CONFIGURATION DOWNLOAD (Models with USB Ports Only)

1. Loosen USB port cover screws with a Phillips head screwdriver.
2. Insert USB flash drive with a valid configuration file.
3. Access the "CF" parameter in programming mode.
4. Press the down arrow button. If a valid file is recognized, the display shows "dLd". If not, it shows "Err".
5. To start download, press the down arrow button again when "dLd" is shown. The display flashes "dLd". Upon completion, it shows "Cpt". Press down arrow again to return to "CF". Errors show "Err".
6. If the unit has multiple controls, repeat steps 3-5 for other decks.

MAINTENANCE

DAILY MAINTENANCE

1. Turn off the unit and allow it to cool for 20 minutes.
2. Remove drawers, wash with mild multi-purpose detergent, rinse, and sanitize.
3. Clean unit and base with a damp cloth/rag and a mild cleaner.

   DO NOT USE A GREEN SCOTCH BRITE PAD OR ANY OTHER ABRASIVE CLEANING PAD. THE BLUE SCOTCH BRITE (NO SCRATCH) IS SAFE TO USE.

   DO NOT USE CAUSTIC CLEANING SOLUTIONS SUCH AS OVEN CLEANER. USE ONLY MILD, NON-ABRASIVE CLEANER.

   DO NOT IMMERSE IN WATER! ⚠️

4. Allow sufficient drying time before use.

MONTHLY MAINTENANCE

1. Follow the daily schedule; no adjustments are needed.
2. Inspect the condition of the cord/plug. Replace if damaged.
3. Inspect the condition of the control overlay. Replace if damaged.
4. With the unit OFF and unplugged, remove drawers to clean the air circulation louvres inside the back of the unit and the upper heater slots to ensure proper air flow.

TROUBLESHOOTING CHART

Before troubleshooting, check if the unit is plugged in, the circuit breaker is not tripped, and the power switch is on.

** DISASSEMBLING HEATER VOIDS WARRANTY **

NOTE: When replacing sensor, a special heat sink sealant will be present when removing failed sensor. Applying new sealant is not required; however, be sure to utilize existing sealant when mounting new sensor.

REPLACEMENT PARTS

Part Replacement Time: 10 min

502080 - Connector, Strain Relief (All Models)

Strain relief used with main power cord 504345 and should be replaced if missing or damaged.

Part Replacement Time: 20 min

182989 - Control (Models DH5D2-6BAC & DH5D2-6BACBWW, All S/N Before 66840 Except 65216 & 65217)

Time/temperature controller factory pre-programmed according to customer's specific settings. Replace if the controller is not operating according to specs or if it won't turn on when 8.5VDC is supplied to it.

Part Replacement Time: 20 min

187312 - Control (Models DH5D2-6BAC & DH5D2-6BACBWW, S/N 65216, 65217 & After 66839)

Four channel Time/temperature controller factory pre-programmed according to customer's specific settings. Replace if the controller is not operating according to specs or if it won't turn on when 8.5VDC is supplied to it.

Picture might not necessarily be representative or actual part.

Part Replacement Time: 20 min

187321L - Control, Left Side Drawer (Model DH5D2-6BAC-3)

Time/temperature controller factory pre-programmed according to customer's specific settings. Replace if the controller is not operating according to specs or if it won't turn on when 8.5VDC is supplied to it.

Part Replacement Time: 20 min

187321R - Control, Right Side Drawer (Model DH5D2-6BAC-3)

Time/temperature controller factory pre-programmed according to customer's specific settings. Replace if the controller is not operating according to specs or if it won't turn on when 8.5VDC is supplied to it.

Part Replacement Time: 10 min

504290 - Cord, 12/3 120V, NEMA 5-20 Plug (All Models)

120V main power cord. Damaged cord can cause unit to stop operating and should be replaced.

Part Replacement Time: N/A

183798 - Divider, Adjustable (All Models)

Dividers are inserted between half or 1/3 pan sizes to prevent them from sliding over each other when opening or closing drawers. Replace if damaged.

Part Replacement Time: N/A

185010 - Drawer, Full Pan (All Models)

Replace if missing or damaged.

Part Replacement Time: 45 min

501964 (4 per) - Element, Bottom Heater (All Models, S/N BEFORE 99999)

These heating blankets are used in the bottom heaters of each deck. A defective blanket could cause non-heating of the associated deck bottom heater and therefore an undesired change in the food product quality.

Part Replacement Time: 45 min

504862 (2 per) - Element, Bottom Heater (All Models, S/N After 99999)

These heating blankets are used in the bottom heaters of each deck. A defective blanket could cause non-heating of the associated deck bottom heater and therefore an undesired change in the food product quality.

Part Replacement Time: 45 min

182966 (4 per) - Element, Top Heater (All Models)

These heating blankets are used in the top heaters of each deck. A defective blanket could cause non-heating of the associated deck top heater and therefore an undesired change in the food product quality.

Part Replacement Time: 15 min

171132 - Fan, Cooling, Asby, 115VAC (All Models)

Fan used inside control box to cool electrical components. Failure can cause electrical components to overheat and fail or alter food product quality. Should be replaced if worn or damaged.

Part Replacement Time: 10 min

504387 - Overlay, 2 Channel Control (Model DH5D2-6BAC & DH5D2-6BACBWW, All S/N Before 66840 Except 65216 & 65217)

The overlay is protecting the controller from any debris that could damage it. Replace if damaged or missing.

Part Replacement Time: 10 min

504860 - Overlay, 2 Channel Control (Model DH5D2-6BAC & DH5D2-6BACBWW, S/N 65216, 65217 & After 66839)

The overlay is protecting the controller from any debris that could damage it. Replace if damaged or missing.

Part Replacement Time: 10 min

504387 - Overlay, 2 Channel Control (Model DH5D2-6BAC-3)

The overlay is protecting the controller from any debris that could damage it. Replace if damaged or missing.

Part Replacement Time: 10 min

504318 - Power Supply (All Models)

The 120VAC to 8.5VDC power supply is used to power the time/temperature controller. A defective power supply could cause controller to not turn on when powered.

Part Replacement Time: 10 min

504023 - Relay, Solid State 25A (All Models)

SSRs are used to turn on and off power delivered to their associated heater once it reaches temperature set point. Failure will cause the associated heater to excessively rise above set point and might cause permanent damage to it.

Part Replacement Time: 10 min

504731 - Roller, Stainless Steel With Screw (All Models)

Damaged roller will prevent drawers from moving smoothly. Replace if damaged.

Part Replacement Time: 30 min

502064 - Sensor, RTD, 48" (All Models)

Used to read heater's temperature. If a RTD sensor goes bad or is disconnected, its associated controller will beep and the display will flash either "oPn" or "SHt" to indicate failure.

Part Replacement Time: 10 min

502425 - Switch, Rocker (Before S/N 65209 & after S/N 70328)

One switch for each deck is used to allow energy efficiency. A bad switch could cause the associated controller to not turn on. Bad or damaged switches should be replaced immediately.

Part Replacement Time: 10 min

187699 - KIT, SWITCH REPLACEMENT (Only for S/N 65209 to 70328)

One switch for each deck is used to allow energy efficiency. A bad switch could cause the associated controller to not turn on. Bad or damaged switches should be replaced immediately.

Part Replacement Time: 10 min

503087 - Terminal Strip, 12 Poles (All Models)

A bad terminal strip can cause bad connections between electrical components. Replace if damaged.

Part Replacement Time: 10 min

166041 - Terminal Strip, 8 Poles (All Models)

A bad terminal strip can cause bad connections between electrical components. Replace if damaged.

Parts List Summary

OVERALL DIMENSIONS

SCHEMATICS

Detailed wiring schematics are provided for different configurations:

• WIRING SCHEMATIC, DH5D2-6BAC & DH5D2-6BACBWW WITH 4-CHANNEL CONTROL (Document #187310)
• WIRING SCHEMATIC, DH5D2-6BAC & DH5D2-6BACBWW WITH 2-CHANNEL CONTROL (Document #182967)
• WIRING SCHEMATIC, DH5D2-6BAC-3 (Document #187314)

QUICK GUIDE, CONTROL OPERATION