Merco MHG22 Installation Manual
MercoMax
TM
Forced Air Holding Cabinet
(MHG) Original Instructions
Installation, Operation and Maintenance Manual
This manual is updated as new information and models are released. Visit our website for the latest manual.
*8197404*
Part Number: MER_IOM_8197404 02/2017
Original Instructions
Safety Notices
Warning
n
Read this manual thoroughly before operating, installing
or performing maintenance on the equipment. Failure
to follow instructions in this manual can cause property
damage, injury or death.
DANGER
Do not install or operate equipment that has been
misused, abused, neglected, damaged, or altered/
modified from that of original manufactured
specifications.
DANGER
Keep power cord AWAY from HEATED surfaces. DO NOT
immerse power cord or plug in water. DO NOT let power
cord hang over edge of table or counter.
Warning
n
Use caution when handling metal surface edges of all
equipment.
Warning
n
This appliance is not intended for use by children
under the age of 16 or persons with reduced physical,
sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision
concerning use of the appliance by a person responsible
for their safety. Do not allow children to play with this
appliance.
Warning
n
DO NOT use this product near water – for example, near
a kitchen sink, in a wet basement, near a swimming
pool, or similar locations.
Warning
n
Authorized Service Representatives are obligated to
follow industry standard safety procedures, including,
but not limited to, local/national regulations for
disconnection / lock out / tag out procedures for all
utilities including electric, gas, water and steam.
Warning
n
Do Not Store Or Use Gasoline Or Other Flammable
Vapors Or Liquids In The Vicinity Of This Or Any Other
Appliance. Never use flammable oil soaked cloths or
combustible cleaning solutions, for cleaning.
Warning
n
This product contains chemicals known to the State
of California to cause cancer and/or birth defects or
other reproductive harm. Operation, installation, and
servicing of this product could expose you to airborne
particles of glasswool or ceramic fibers, crystalline
silica, and/or carbon monoxide. Inhalation of airborne
particles of glasswool or ceramic fibers is known to the
State of California to cause cancer. Inhalation of carbon
monoxide is known to the State of California to cause
birth defects or other reproductive harm.
NOTE: Proper installation, care and maintenance are essential
for maximum performance and trouble-free operation of
your equipment. Visit our website www.mercoproducts.com
for manual updates, translations, or contact information for
service agents in your area.
Warning
n
Do not use electrical appliances or accessories other
than those supplied by the manufacturer.
Section 1
General Information
Section 2
Installation
Section 3
Operation
Section 4
Maintenance
Section 5
Troubleshooting
Table of Contents
Model Numbers ...............................................................................................................1-1
Serial Number Information ............................................................................................1-1
Service Personnel ............................................................................................................1-1
Shipping Damage Claim Procedure ...............................................................................1-1
Kitchen Management Contact Information ..................................................................1-1
Warranty Information .....................................................................................................1-1
Regulatory Certifications ...............................................................................................1-1
Location ...........................................................................................................................2-1
Weight of Equipment ......................................................................................................2-2
Clearance Requirements .................................................................................................2-2
Dimensions ......................................................................................................................2-2
Electrical Service .............................................................................................................2-3
Voltage, Watts, Rated Amperages & Power Cord Chart ........................................................2-3
Component Identification ..............................................................................................3-1
Control Zones ..................................................................................................................3-2
Control Panel ...................................................................................................................3-2
Controls/Programming/Settings ...................................................................................3-2
Typical Operator Actions .................................................................................................................3-2
Pre-Heat Mode ....................................................................................................................................3-3
Active Heating Mode ........................................................................................................................3-3
Time Button .........................................................................................................................................3-3
Temperature View Mode ................................................................................................................3-3
Changing the Day Part .....................................................................................................................3-3
Timer Bars .............................................................................................................................................3-3
LED Indicators .....................................................................................................................................3-3
Cleaning and Sanitizing Procedures ..............................................................................4-1
General ...................................................................................................................................................4-1
Exterior Cleaning ................................................................................................................................4-1
Interior Cleaning .................................................................................................................................4-2
Plastic Tray Cleaning ..........................................................................................................................4-2
Daily Cleaning Instructions .............................................................................................................4-2
Troubleshooting Chart ...................................................................................................5-1
Communication Error Messages ....................................................................................5-1
Heater/Thermocouple Error Messages ..........................................................................5-1
Part Number: MER_IOM_8197404
Section 1
General Information
Model Numbers
Domestic Models
MHG22SAN1N
MHG22SAB1N/2N, 23, 24, 34, 32, 42
Understanding Model Numbers
M H G 2 2 S A B 2 N
Merco
Cabinet
Hot Holding
Customer
Rows (Shelves)
2-4
G- General Market
shelf)
Columns
(Trays per
2-4
Lower Heat
S- Standard
Display
Upper Heat
N-None
1- One Side
B-Timer Bar
A- Forced Air
Control Faces
2- Two Sided
Connectivity
N- None
Serial Number Information
MHG holding cabinet serial and model numbers are located
on the data plate. Data plates are located on the bottom and
the right end of the unit.
Always have the serial number of your unit available
when calling for parts or service.
Shipping Damage Claim Procedure
What to do if your equipment arrives damaged:
Please note that this equipment was carefully inspected
and packed by skilled personnel before leaving the factory.
The freight company assumes full responsibility for safe
delivery upon acceptance of the equipment.
1. File Claim for Damages Immediately - regardless of
extent of damage.
2. Inspect For and Record All Visible Loss or Damage,
and ensure that this information is noted on the freight
bill or express receipt and is signed by the person
making the delivery.
3. Concealed Loss or Damage- If damage is unnoticed until
equipment is unpacked, notify the freight company or
carrier immediately upon discovery and file a concealed
damage claim. This must be submitted within 15 days of
date of delivery. Be sure to retain container for inspection.
MERCO DOES NOT ASSUME RESPONSIBILITY FOR DAMAGE
OR LOSS INCURRED IN TRANSIT.
Warranty Information
Visit http://www.mercoproducts.com/Service#Warranty to:
• Register your product for warranty.
• Verify warranty information.
• View and download a copy of your warranty.
Regulatory Certifications
Service Personnel
All service on Merco equipment must be performed by
qualified, certified, licensed, and/or authorized or service
personnel.
Qualified service personnel are those who are familiar
with Merco equipment and who have been authorized by
Merco to perform service on the equipment. All authorized
service personnel are required to be equipped with a
complete set of service and parts manuals, and to stock a
minimum amount of parts for Merco equipment. A list
of Merco Factory Authorized Servicers (FAS’s) is located
on the Merco website at http://www.mercoproducts.
com/Service#Service. Failure to use qualified service
personnel will void the Merco warranty on your equipment.
Part Number: MER_IOM_8197404 1-1
Domestic Models are certified by:
• Underwriters Laboratories Sanitation
• Underwriters Laboratories (UL)
• Underwriters Laboratories of Canada (ULC)
Section 2
Installation
DANGER
Installation must comply with all applicable fire and
health codes in your jurisdiction.
DANGER
Legs must be installed and the legs must be screwed in
completely.
DANGER
Use appropriate safety equipment during installation
and servicing.
Warning
n
Only trained and authorized service personnel or store
manager should access the service screens. If changes
to these settings are made incorrectly they will cause
the unit to malfunction.
Location
Warning
n
This equipment must be positioned so that the plug is
accessible unless other means for disconnection from
the power supply (e.g., circuit breaker or disconnect
switch) is provided.
Warning
n
Adequate means must be provided to limit the
movement of this appliance without depending on or
transmitting stress to the electrical conduit or gas lines.
Warning
n
To avoid instability the installation area must be capable
of supporting the combined weight of the equipment
and product. Additionally the equipment must be level
side to side and front to back.
Warning
n
This equipment is intended for indoor use only. Do not
install or operate this equipment in outdoor areas.
Caution
,
Do not position the air intake vent near steam or heat
exhaust of another appliance.
The location selected for the equipment must meet the
following criteria. If any of these criteria are not met, select
another location.
• Holding cabinets are intended for indoor use only.
• The location MUST be level, stable and capable of
supporting the weight of the equipment.
• The location MUST be free from and clear of
combustible materials.
• Equipment MUST be level both front to back and side to
side.
• Position the equipment so it will not tip or slide.
• Recommended air temperature is 41° - 86°F (5° - 30°C) .
• Proper air supply for ventilation is REQUIRED AND
CRITICAL for safe and efficient operation. Refer to
Clearance Requirements chart on page 2-2.
• Do not obstruct the flow of ventilation air. Make sure the
air vents of the equipment are not blocked.
Part Number: MER_IOM_8197404 2-1
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