MHG22 Series MercoMax Forced Air Holding Cabinet Instruction Manual

: June 1, 2024
: Merco

Table of Contents

MHG22 Series MercoMax Forced Air Holding Cabinet
Product Infomation
Product Usage Instructions
FAQs
Common Components
CONTACT
Read User Manual Online (PDF format)
Download This Manual (PDF format)

MHG22 Series MercoMax Forced Air Holding Cabinet

MHG22-Series-MercoMax-Forced-Air-Holding-Cabinet-
product

Product Infomation

Specifications:
- Product Name: MercoMax Forced Air Holding Cabinet (MHG)
- Part Number: MER_P_8197432
- Heater Assembly: 120V, 700W for MHG22 with Timer Bars / 120V, 450W for MHG22 without Timer Bars
- Power Supply: 12VDC, 30W for MHG22 with Timer Bars / 12VDC, 65W for MHG22 without Timer Bars
- Tray Insert: Not supplied with domestic units

Product Usage Instructions

Assembly Instructions:
- Ensure all components are available as per the parts manual.
- Follow the assembly steps provided in the manual for the specific model (MHG22 with Timer Bars or without Timer Bars).
- Securely attach the cover panels and insert any required tray inserts.
Powering Up the Cabinet:
- Connect the appropriate power supply based on the model (MHG22 with Timer Bars or without Timer Bars).
- Switch on the rocker switch and ensure the cabinet is receiving power.
Temperature Control:
- Set the desired temperature using the membrane switch on the cabinet.
- Monitor the temperature levels using the display panel if available.

FAQs

Q: Are tray inserts included with the unit?
- A: Tray inserts are not supplied with domestic units. They need to be purchased separately if required.
Q: What is the power supply specification for the cabinet?
- A: The power supply is 12VDC, 30W for MHG22 with Timer Bars and 12VDC, 65W for MHG22 without Timer Bars.

Common Components

MHG22 with Timer Bars- Common Components

$MHG22-Series-MercoMax-Forced-Air-Holding-Cabinet-fig-1 $1$$

| Item| Part Number| Description| Note
---|---|---|---|---
| | 1087396| Complete Cabinet Assembly (MHG22) w/ Timer Bar|
| 1| MER10001682| Tray Insert (FM PN 2601740)|
| 2| 2601677| Left Hand Side Cover Panel|
√| 3| 1087309SP| Heater Assembly, 120V, 700W, Air with Fan|
√| 4| 8076100| Heater Pad, 120V, 330W w/Thermocouple Kit|
| 5| 1087289| Right Hand Side Cover Panel|
| 6| 8076146| Membrane Switch|
√| 7| 8076023| Rocker Switch, 250V, 16A|
| 8| MER340011| Hi Temp Leveling Mount (FM PN 8104733)|
√| 9| 8263405| Board, I/O Merco GM|
√| 10| 2195354

8076336

| Power Supply, 12VDC, 30W (FM PN 8076001)

Power Supply, 12VDC, 65W CE

|
| 11| 8104752| Shelf, 2 Wide|
| 12| 1087272| Bracket, Single I/O Board Mount w/o SUI|
| 12A| 1087269| Bracket, Power Supply|
| 13| 8239275| Diffuser, Air Assembly 2 Wide|
| 14| 8242410| Tray Seal|
| 15| 1708578| Plastic Tray, Double Handle (FM PN 8030491)|
√| 16| 8263411| Timer Bar Assembly, 2/Wide 2/Display, Front (Single Sided Unit only)|
√| 8263412| Timer Bar Assembly, 2/Wide 2/Display, Front (Double Sided Unit only)|
√| 16A| 8263413| Timer Bar Assembly, 2/Wide 2/Display, Rear (Double Sided Unit only)|
| 17| 8242417| Assembly, Timer Bar Mounting Bracket|
| 17A| 8239286| Assembly, Timer Bar Mounting Bracket 2-Wide|
| 18| 1087291| Support, Hold-down Shelf|
| 19| 8239271| Divider, W/A, Plenum Center|
| 20| 8239284| Air W/A, 2X2 Plenum|
√| 21| 8076102| Probe, Air Heater|
| 22| 1087306| Cover, 2-Wide Top|
| | 8076029| Cable, Communication Long 9.50”|
| | 2186998| Cable, Communication Master to Display, 6-pin, 12 inch internal cable (FM PN 8076009)|
| | 2187007| Cable, 12 inch, USB ext., Panel Mount Female, from IO Board to USB port (FM PN 8076010)|
| | 8076012| Cable, 6-pin to 4-pin, 26”, Display to Timerbar|
| | 8076080| Harness, AC Power, 2X2|
| | 8076079| Harness, DC Power, 2X2|
| | 2186984| Cord, NEMA 5-20P, 12/3 Domestic (FM PN 8076062)|
| | 2187033| Cordset, Pin/Sleeve, 16A, Export|

√ Recommended Parts

MHG22 without Timer Bars- Common Components

$MHG22-Series-MercoMax-Forced-Air-Holding-Cabinet-fig-1 $2$$

| Item| Part Number| Description| Note
---|---|---|---|---
| | 1087443| Complete Cabinet Assembly (MHG22) w/out Timer Bar|
| 1| MER10001682| Tray Insert (FM PN 2601740)|
| 2| 2601818| Left Hand Side Cover Panel|
√| 3| 1087509SP| Heater Assembly, 120V, 450W, Air with Fan|
√| 4| 8076171| Heater Pad, 120V, 200W w/Thermocouple Kit|
| 5| 1087289| Right Hand Side Cover Panel|
| 6| 8076146| Membrane Switch|
√| 7| 8076023| Rocker Switch, 250V, 16A|
| 8| MER340011| Hi Temp Leveling Mount (FM PN 8104733)|
√| 9| 8263405| Board, I/O Merco GM|
√| 10| 2195354

8076336

| Power Supply, 12VDC, 30W (FM PN 8076001)

Power Supply, 12VDC, 65W CE

|
| 11| 8104752| Shelf, 2 Wide|
| 12| 1087272| Bracket, Single I/O Board Mount w/o SUI|
| 12A| 1087269| Bracket, Power Supply|
| 13| 8239275| Diffuser, Air Assembly 2 Wide|
| 14| 8242410| Tray Seal|
| 15| 1708578| Plastic Tray, Double Handle (FM PN 8030491)|
√| 16| 8076021| Board, Display|
| 17| 8076147| Overlay, Display|
| 18| 1087291| Support, Hold-down Shelf|
| 19| 1087304| Air Assy, 2-Wide Plenum|
| 20| 8076102| Probe, Air Heater|
| 21| 1087306| Cover, 2-Wide Top|
| | 2187007| Cable, 12 inch, USB ext., Panel Mount Female, from IO Board to USB port (FM PN 8076010)|
| | 8076080| Harness, AC Power, 2X2|
| | 8076079| Harness, DC Power, 2X2|
| | 2186984| Cord, NEMA 5-20P, 12/3 Domestic (FM PN 8076062)|
| | 2187033| Cordset, Pin/Sleeve, 16A, Export|

√ Recommended Parts

MHG23 – Common Components

$MHG22-Series-MercoMax-Forced-Air-Holding-Cabinet-fig-1 $3$$

| Item| Part Number| Description| Note
---|---|---|---|---
| | 1087397| Complete Cabinet Assembly (MHG23) w/ Timer Bar|
| 1| MER10001682| Tray Insert (FM PN 2601740)|
| 2| 1087269| Bracket, Power Supply|
√| 3| 1087310SP| Heater Assembly, 230V, 700W, Air w/Fan (replace with 450W if voltage is greater than 230V)|
√| 1087290SP| Heater Assembly, 230V, 450W, Air with Fan|
| 4| 1087272| Bracket, Single I/O Board Mount w/o SUI|
| 5| 1087289| Right Hand Side Cover Panel|
| 6| 8076146| Membrane Switch|
√| 7| 8076023| Rocker Switch, 250V, 16A|
| 8| MER340011| Hi Temp Leveling Mount (FM PN 8104733)|
√| 9| 8263405| Board, I/O Merco GM|
√| 10| 2195354

8076336

| Power Supply, 12VDC, 30W (FM PN 8076001)

Power Supply, 12VDC, 65W CE

|
√| 11| 8076099| Heater Pad, 230V, 200W w/Thermocouple|
√| 12| 8076098| Heater Pad, 230V, 100W w/Thermocouple Single|
| 13| 8239283| Diffuser, Air Assembly 1 Wide|
| 14| 8239275| Diffuser, Air Assembly 2 Wide|
| 15| 8242410| Tray Seal|
| 16| 8242417| Assembly, Timer Bar Mounting Bracket|
| 17| 1708578| Plastic Tray, Double Handle (FM PN 8030491)|
√| 18| 8263410| Timerbar, 3/Wide 3/Display (Front and Rear)|
| 19| 1087291| Support, Hold-down Shelf|
| 20| 8239271| Divider, W/A, Plenum Center|
| 21| 8239282| Air W/A, 2X3 Plenum|
√| 22| 8076102| Probe, Air Heater|
| 23| 2601677| Left Hand Side Cover Panel|
| 24| 8104729| Shelf, 3 Wide|
| 25| 1087300| Cover, 3-Wide Top|
| | 8076029| Cable, Communication Long 9.50”|
| | 2186997| Comm Cable 8 pin, 52” internal from Primary IO BD to Secondary IO BD (FM#8076017)|
| | 2186998| Cable, Communication Master to Display, 6-pin, 12 inch internal cable (FM PN 8076009)|
| | 2187007| Cable, 12 inch, USB ext., Panel Mount Female, from IO Board to USB port (FM PN 8076010)|
| | 8076012| Cable, 6-pin to 4-pin, 26”, Display to Timerbar|
| | 8076013| Harness, AC Power, 2X4,2X3|
| | 8076015| Harness, DC Power, 2X4, 2X3|
| | 2186993| Cord, NEMA 6-20P, 12/3 Domestic (FM PN 8076026)|
| | 2187033| Cordset, Pin/Sleeve, 16A, Export|

√ Recommended Parts

MHG24 – Common Components $MHG22-Series-MercoMax-Forced-Air-Holding- Cabinet-fig-1 $4$$

| Item| Part Number| Description| Note
---|---|---|---|---
| | 1087398| Complete Cabinet Assembly (MHG24) w/ Timer Bar|
| 1| MER10001682| Tray Insert (FM PN 2601740)|
| 2| 1087269| Bracket, Power Supply|
√| 3| 1087310SP| Heater Assembly, 230V, 700W, Air w/Fan (replace with 450W if voltage is greater than 230V)|
√| 1087290SP| Heater Assembly, 230V, 450W, Air with Fan|
| 4| 1087272| Bracket, Single I/O Board Mount w/o SUI|
| 5| 1087289| Right Hand Side Cover Panel|
| 6| 8076146| Membrane Switch|
√| 7| 8076023| Rocker Switch, 250V, 16A|
| 8| MER340011| Hi Temp Leveling Mount (FM PN 8104733)|
√| 9| 8263405| Board, I/O Merco GM|
√| 10| 2195354

8076336

| Power Supply, 12VDC, 30W (FM PN 8076001)

Power Supply, 12VDC, 65W CE

|
√| 11| 8076099| Heater Pad, 230V, 200W w/Thermocouple|
| 12| 8104726| Shelf, 4 Wide|
| 13| 8239275| Diffuser, Air Assembly 2 Wide|
| 14| 8242410| Tray Seal|
| 15| 1708578| Plastic Tray, Double Handle (FM PN 8030491)|
√| 16| 8263407| Timerbar, 4/Wide 4/Display Front (Single Sided Unit only)|
√| 8263408| Timerbar, 4/Wide 4/Display Front /Rear (Double Sided Unit only)|
| 17| 8242417| Assembly, Timer Bar Mounting Bracket|
| 18| 1087291| Support, Hold-down Shelf|
| 19| 8239271| Divider, W/A, Plenum Center|
| 20| 8239272| Air W/A, 2X4 Plenum|
√| 21| 8076102| Probe, Air Heater|
| 22| 2601677| Left Hand Side Cover Panel|
| 23| 1087293| Cover, 4 Wide Top|
| | 8076029| Cable, Communication Long 9.50”|
| | 2186997| Comm Cable 8 pin, 52” internal from Primary IO BD to Secondary IO BD (FM#8076017)|
| | 2186998| Cable, Communication Master to Display, 6-pin, 12 inch internal cable (FM PN 8076009)|
| | 2187007| Cable, 12 inch, USB ext., Panel Mount Female, from IO Board to USB port (FM PN 8076010)|
| | 8076012| Cable, 6-pin to 4-pin, 26”, Display to Timerbar|
| | 8076013| Harness, AC Power, 2X4,2X3|
| | 8076015| Harness, DC Power, 2X4, 2X3|
| | 2186993| Cord, NEMA 6-20P, 12/3 Domestic (FM PN 8076026)|
| | 2187033| Cordset, Pin/Sleeve, 16A, Export|

√ Recommended Parts

MHG32 – Common Components

$MHG22-Series-MercoMax-Forced-Air-Holding-Cabinet-fig-1 $5$$

| Item| Part Number| Description| Note
---|---|---|---|---
| | 1087444| Complete Cabinet Assembly (MHG32) w/ Timer Bar|
| 1| MER10001682| Tray Insert (FM PN 2601740)|
| 2| 2601814| Left Hand Side Cover Panel 3H|
√| 3| 1087290SP| Heater Assembly, 230V, 450W, Air with Fan|
√| 4| 8076099| Heater Pad, 230V, 200W w/Thermocouple Kit|
| 5| 1087301| Right Hand Side Cover Panel 3H|
| 6| 8076146| Membrane Switch|
√| 7| 8076023| Rocker Switch, 250V, 16A|
| 8| MER340011| Hi Temp Leveling Mount (FM PN 8104733)|
√| 9| 8263405| Board, I/O Merco GM|
√| 10| 2195354

8076336

| Power Supply, 12VDC, 30W (FM PN 8076001)

Power Supply, 12VDC, 65W CE

|
| 11| 8104752| Shelf, 2 Wide|
| 12| 1087433| Bracket, Double I/O Board Mount|
| 12A| 1087269| Bracket, Power Supply|
| 13| 8239275| Diffuser, Air Assembly 2 Wide|
| 14| 8242410| Tray Seal|
| 15| 1708578| Plastic Tray, Double Handle (FM PN 8030491)|
| 16| 8263412| Timer Bar Assembly, 2/Wide 2/Display, Front|
√| 16A| 8263413| Timer Bar Assembly, 2/Wide 2/Display, Rear|
√| 16B| 8263466| Timer Bar Assembly, 2/Wide 1/Display, Front 1087600|
√| 16C| 8263467| Timer Bar Assembly, 2/Wide 1/Display, Rear 1087601|
| 17| 8242417| Assembly, Timer Bar Mounting Bracket|
| 17A| 8239286| Assembly, Timer Bar Mounting Bracket 2-Wide|
| 18| 1087291| Support, Hold-down Shelf|
| 19| 2601735| Cover, 2-Wide Top|
| 20| 8239284| Air W/A, 2X2 Plenum|
√| 21| 8076102| Probe, Air Heater|
| | 8076029| Cable, Communication Long 9.50”|
| | 2186998| Cable, Communication Master to Display, 6-pin, 12-inch internal cable (FM PN 8076009)|
| | 2187007| Cable, 12 inches, USB ext., Panel Mount Female, from IO Board to USB port (FM PN 8076010)|
| | 8076012| Cable, 6-pin to 4-pin, 26”, Display to Timerbar|
| | 8076145| Harness, AC Power, 3X2|
| | 8076143| Harness, DC Power, 3X2|
| | 2186993| Cord, NEMA 6-20P, 12/3 Domestic (FM PN 8076026)|
| | 2187033| Cordset, Pin/Sleeve, 16A, Export|

√ Recommended Parts

MHG34 – Common Components

$MHG22-Series-MercoMax-Forced-Air-Holding-Cabinet-fig-1 $6$$

| Item| Part Number| Description| Note
---|---|---|---|---
| | 1087399| Complete Cabinet Assembly (MHG34)w/ Timer Bar|
| 1| MER10001682| Tray Insert (FM PN 2601740)|
| 2| 1087293| Cover, 4 Wide Top|
√| 3| 1087290SP| Heater Assembly, 230V, 450W, Air with Fan|
| 4| 2401547| Bracket, Double I/O Board Mount|
| 5| 1087301| Right Hand Side Cover Panel|
| 6| 8076146| Membrane Switch|
√| 7| 8076023| Rocker Switch, 250V, 16A|
| 8| MER340011| Hi Temp Leveling Mount (FM PN 8104733)|
√| 9| 8263405| Board, I/O Merco GM|
√| 10| 2195354

8076336

| Power Supply, 12VDC, 30W (FM PN 8076001)

Power Supply, 12VDC, 65W CE

|
√| 11| 8076038| Relay, Power Heavy Duty 200-240VAC|
| 12| 1087272| Bracket, Single I/O Board Mount w/o SUI|
| 12A| 1087269| Bracket, Power Supply|
| 13| 8239275| Diffuser, Air Assembly 2 Wide|
| 14| 8242410| Tray Seal|
| 15| 1708578| Plastic Tray, Double Handle (FM PN 8030491)|
√| 16| 8263407| Timerbar, 4/Wide 4/Display Front Lower (Single Sided Unit only)|
√| 8263408| Timerbar, 4/Wide 4/Display Front /Rear Lower (Double Sided Unit only)|
√| 16A| 8263409| Timerbar, 4/Wide 2/Display Front /Rear Upper (Single and Double Sided Unit)|
| 17| 8242417| Assembly, Timer Bar Mounting Bracket|
| 18| 1087291| Support, Hold-down Shelf|
| 19| 8239271| Divider, W/A, Plenum Center|
| 20| 8239272| Air W/A, 2X4 Plenum|
√| 21| 8076102| Probe, Air Heater|
| 22| 2601678| Left Hand Side Cover Panel|
| 23| 8104726| Shelf, 4 Wide|
√| 24| 8076099| Heater Pad, 230V, 200W w/Thermocouple Kit|
√| 25| 8076101| Heater Pad, 230V, 200W w/Thermocouple Kit with Long Thermocouple for Zone #6|
| | 8076029| Cable, Communication Long 9.50”|
| | 2186997| Comm Cable 8 pin, 52” internal from Primary IO BD to Secondary IO BD (FM#8076017)|
| | 2186998| Cable, Communication Master to Display, 6-pin, 12 inch internal cable (FM PN 8076009)|
| | 2187007| Cable, 12 inch, USB ext., Panel Mount Female, from IO Board to USB port (FM PN 8076010)|
| | 8076012| Cable, 6-pin to 4-pin, 26”, Display to Timerbar|
| | 8076014| Harness, AC Power, 3X4|
| | 8076016| Harness, DC Power, 3X4|
| | 2186993| Cord, NEMA 6-20P, 12/3 Domestic (FM PN 8076026)|

√ Recommended Parts

MHG42 – Common Components

$MHG22-Series-MercoMax-Forced-Air-Holding-Cabinet-fig-1 $7$$

| Item| Part Number| Description| Note
---|---|---|---|---
| | 1087445| Complete Cabinet Assembly (MHG42) W/ Timer Bar|
| 1| MER10001682| Tray Insert (FM PN 2601740)|
| 2| 2601811| Left Hand Side Cover Panel 4H|
√| 3| 1087290SP| Heater Assembly, 230V, 450W, Air with Fan|
√| 4| 8076099| Heater Pad, 230V, 200W w/Thermocouple Kit|
| 5| 1087454| Right Hand Side Cover Panel 4H|
| 6| 8076146| Membrane Switch|
√| 7| 8076023| Rocker Switch, 250V, 16A|
| 8| MER340011| Hi Temp Leveling Mount (FM PN 8104733)|
√| 9| 8263405| Board, I/O Merco GM|
√| 10| 2195354

8076336

| Power Supply, 12VDC, 30W (FM PN 8076001)

Power Supply, 12VDC, 65W CE

|
| 11| 8104752| Shelf, 2 Wide|
| 12| 1087433| Bracket, Double I/O Board Mount|
| 12A| 1087269| Bracket, Power Supply|
| 13| 8239275| Diffuser, Air Assembly 2 Wide|
| 14| 8242410| Tray Seal|
| 15| 1708578| Plastic Tray, Double Handle (FM PN 8030491)|
| 16| 8263412| Timer Bar Assembly, 2/Wide 2/Display, Front|
√| 16A| 8263413| Timer Bar Assembly, 2/Wide 2/Display, Rear|
| 17| 8242417| Assembly, Timer Bar Mounting Bracket|
| 17A| 8239286| Assembly, Timer Bar Mounting Bracket 2-Wide|
| 18| 1087291| Support, Hold-down Shelf|
| 19| 2601735| Cover, 2-Wide Top|
| 20| 8239284| Air W/A, 2X2 Plenum|
√| 21| 8076102| Probe, Air Heater|
| | 8076029| Cable, Communication Long 9.50”|
| | 2186998| Cable, Communication Master to Display, 6-pin, 12 inch internal cable (FM PN 8076009)|
| | 2187007| Cable, 12 inch, USB ext., Panel Mount Female, from IO Board to USB port (FM PN 8076010)|
| | 8076012| Cable, 6-pin to 4-pin, 26”, Display to Timerbar|
| | 8076144| Harness, AC Power, 4X2|
| | 8076143| Harness, DC Power, 4X2, 3×2|
| | 2186993| Cord, NEMA 6-20P, 12/3 Domestic (FM PN 8076026)|
| | 2187033| Cordset, Pin/Sleeve, 16A, Export|

√ Recommended Parts

Welbilt offers fully integrated kitchen systems. Welbilt’s portfolio of award- winning brands includes Cleveland™, Convotherm®, Crystal Tips®, Dean®, Delfield®, Fabristeel®, Frymaster®, Garland®, Inducs®, Koldtech®, Kolpak®, Lincoln®, McCann’s™, Merco®, Merrychef®, Multiplex®, RDI®, SerVend™, SunFire®, U.S. Range™ and WMaxx™. These product brands are supported by these service brands: FitKitchen®, our fully-integrated kitchen systems brand, and KitchenConnect®, our cloud-based digital platform brand. Bringing innovation to the table · welbilt.com. ©2023 Welbilt Inc. except where explicitly stated otherwise. All rights reserved. Continuing product improvement may necessitate a change of specifications without notice.

CONTACT

Part Number: MER_P_8197432 05/2023
MERCO 8700 LINE AVENUE, SHREVEPORT, LA 71106-6800
MERCO SALES: 800.221.4583
MERCO SERVICE: 877.392.7770
Serving Quality on Demand
WWW.MERCOPRODUCTS.COM.

NOTICE: IF, DURING THE WARRANTY PERIOD, THE CUSTOMER USES A PART FOR THIS WELBILT EQUIPMENT OTHER THAN AN UNMODIFIED NEW OR RECYCLED PART PURCHASED DIRECTLY FROM MERCO, OR ANY OF ITS FACTORY AUTHORIZED SERVICERS, AND/OR THE PART BEING USED IS MODIFIED FROM ITS ORIGINAL CONFIGURATION, THIS WARRANTY WILL BE VOID. FURTHER, MERCO AND ITS AFFILIATES WILL NOT BE LIABLE FOR ANY CLAIMS, DAMAGES OR EXPENSES INCURRED BY THE CUSTOMER THAT ARISE DIRECTLY OR INDIRECTLY, IN WHOLE OR IN PART, DUE TO THE INSTALLATION OF ANY MODIFIED PART AND/OR PART RECEIVED FROM AN UNAUTHORIZED SERVICER. This manual is updated as new information and models are released. Visit our website for the latest manual.