Merco HMC Series Operation Manual

Installation and Operation Manual

Heated Merchandising Cabinets

HMC Series

I&W #07.05.239.00

Do not operate this equipment unless you have read and understood the contents of this manual! Failure to follow the instructions contained in this manual may result in serious injury or death. This manual contains important safety information concerning the maintenance, use, and operation of this product. If you’re unable to understand the contents of this manual, please bring it to the attention of your supervisor. Keep this manual in a safe location for future reference.

No opere este equipo al menos que haya leído y comprendido el contenido de este manual! Cualquier falla en el seguimiento de las instrucciones contenidas en este manual puede resultar en un serio lesión o muerte. Este manual contiene importante información sobre seguridad concerniente al mantenimiento, uso y operación de este producto. Si usted no puede entender el contenido de este manual por favor pregunte a su supervisor. Almacenar este manual en una localización segura para la referencia futura.

CONTENTS

NOTICE

CAUTION

WARNING

Important Owner Information ...............................................i

Introduction............................................................................i

Important Safety Information...............................................1

Model Description.................................................................2

Model Designation ................................................................2

Specifications........................................................................3

Plug Configurations .........................................................3

Electrical Rating Chart .....................................................3

Dimensions......................................................................4

Installation.............................................................................5

General............................................................................5

Reversing the Access Door .............................................6

Relocating the Proximity Switch ......................................7

Operation...............................................................................8

General............................................................................8

Setting the Air Temperature.............................................8

Setting the Humidity Level ...............................................9

Food Holding Guide.........................................................9

IMPORTANT OWNER INFORMATION

Record the model number, serial number (specification label located on the ceiling sheet inside the unit), voltage, and purchase date of the unit in the spaces below. Please have this information available when calling Merco for service assistance.

Model No. ____________________________________

Serial No. ____________________________________

Voltage ______________________________________

Date of Purchase ______________________________

Maintenance ........................................................................10

General..........................................................................10

Cleaning ........................................................................10

Removing the Glass Panels ..........................................10

Removing the Rotating Rack .........................................10

Draining the Water Reservoir.........................................11

Removing Lime and Mineral Deposits ...........................11

Replacing a Display Light ..............................................11

Troubleshooting Guide ......................................................12

Options and Accessories ...................................................13

Merco Limited Warranty .....................................Back Cover

Business 8:00 Hours: Central Standard Time (C.S.T.)

Telephone: 800.506.9565 (Technical Support)

Additional information can be found by visiting our web site at www.mercoproducts.com.

AM to 5:00 PM

888.417.5462 (Customer Service)

Merco, LLC 1111 North Hadley Road Fort Wayne, Indiana 46804 United States of America

INTRODUCTION

Merco Heated Merchandising Cabinets are designed to hold prepared foods for prolonged periods of time while maintaining that “just-made” quality. Heated Merchandising Cabinets provide the best environment for food products by regulating the air temperature while at the same time balancing the humidity level. The use of controlled, moisturized heat maintains serving temperature and food texture longer than conventional dry holding equipment.

The Heated Merchandising Cabinet’s air flow pattern is designed to maintain consistent cabinet temperature without drying out foods. The precise combination of heat and humidity creates a “blanket” effect around the food. The air flow rate enables the cabinet to recover temperature rapidly after opening and closing the door.

Merco Heated Merchandising Cabinets are products of extensive research and field testing. The materials used were selected for maximum durability, attractive appearance and optimum performance. Every unit is inspected and tested thoroughly prior to shipment.

This manual provides installation, safety, and operating instructions for Heated Merchandising Cabinets. Merco recommends all installation, operating, and safety instructions appearing in this manual be read prior to installation or operation of the unit.

Safety information that appears in this manual is identifie the following signal word panels:

WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE is used to address practices not related to personal injury.

d by

Form No. HMCM-0210

IMPORTANT SAFETY INFORMATION

WARNING

NOTICE

CAUTION

WARNING

Read the following important safety information before using this equipment to avoid serious injury or death

and to avoid damage to equipment or property.

ELECTRIC SHOCK HAZARD:

• Plug unit into a properly grounded electrical receptacle of the correct voltage, size, and plug configuration. If plug and receptacle do not match, contact a qualified electrician to determine and install the proper voltage and size electrical receptacle.

• Turn power switch OFF, unplug power cord, and allow unit to cool before performing any maintenance or cleaning.

• DO NOT submerge or saturate with water. Unit is not waterproof. Do not operate if unit has been submerged or saturated with water.

• Unit is not weatherproof. Locate unit indoors where ambient air temperature is a minimum of 70°F (21°C).

• Do not steam clean or use excessive water on unit.

• Do not overfill water reservoir. Overfilling can cause electrical shock. Water reservoir is full when “LO H2O” stops flashing on CABINET TEMPERATURE display. Stop filling when “LO H2O” stops flashing on display.

• Turn power switch OFF and allow unit to cool before draining water reservoir.

• Do not pull unit by power cord.

• Discontinue use if power cord is frayed or worn.

• Do not attempt to repair or replace a damaged power cord. The cord must be replaced by Merco, a Factory Authorized Service Agent, or a person with similar qualifications.

• This unit must be serviced by qualified personnel only. Service by unqualified personnel may lead to electric shock or burn.

• Use only Original Equipment Manufacturer (OEM) Replacement Parts when service is required. Failure to use OEM Replacement Parts will void all warranties and may subject operators of the equipment to hazardous electrical voltage, resulting in electrical shock or burn. OEM Replacement Parts are specified to operate safely in the environments in which they are used. Some aftermarket or generic replacement parts do not have the characteristics that will allow them to operate safely in Merco equipment.

FIRE HAZARD: Locate unit a minimum of 1″ (25 mm) from combustible walls and materials. If safe distances are not maintained, discoloration or combustion could occur.

The fluorescent light fixtures in this unit have plastic safety shields covering the fluorescent tubes to meet National Sanitation Foundation (NSF) standards. To avoid personal injury and/or food contamination, always operate the unit with the plastic safety shields properly installed.

This unit is not intended for use by children or persons with reduced physical, sensory, or mental capabilities. Ensure proper supervision of children and keep them away from the unit.

Make sure all operators have been instructed on the safe and proper use of the unit.

Make sure food product has been heated to the proper food-safe temperature before placing in unit. Failure to heat food product properly may result in serious health risks. This unit is for holding pre-heated food product only.

Merco is not responsible for the actual food product serving temperature. It is the responsibility of the user to ensure that the food product is held and served at a safe temperature.

This unit has no “user-serviceable” parts. If service is required on this unit, contact a Factory Authorized Service Agent or contact the Merco Service Department at 800-506-9565.

BURN HAZARD: Some exterior surfaces on the unit will get hot. Use caution when touching these areas.

Locate unit at the proper counter height in an area that is convenient for use. The location should be level to prevent the unit or its contents from falling accidentally and strong enough to support the weight of the unit and contents.

The National Sanitation Foundation (NSF) requires that units over 36″ (914 mm) in width or weighing more than 80 lbs. (36 kg) either be sealed to or raised above the installation surface. If unit cannot be sealed at the point of use, 4″ (102 mm) legs are included to allow for proper cleaning access below unit.

Transport unit in upright position only. Before moving or tipping unit, secure all glass surfaces with tape and drain water from water reservoir. Failure to do so may result in damage to unit or personal injury.

Use of distilled water in the water reservoir of humidified units is recommended to preserve the life of electrical and mechanical components. If non-distilled water is used, the reservoir will require periodic cleaning and deliming (refer to the MAINTENANCE section for cleaning procedure). Unit failure due to lime or mineral deposits is not covered under warranty.

Do not use deionized water. Deionized water will shorten the life of the water pan and heating element.

Use non-abrasive cleaners only. Abrasive cleaners could scratch the finish of the unit, marring its appearance and making it susceptible to soil accumulation.

Clean unit daily to avoid malfunctions and maintain sanitary operation.

Form No. HMCM-0210

MODEL DESCRIPTION

H M C - 1 X

Heated Merchandising Cabinet

1 = One Door 2 = Two Doors

No Motorized Rack Rotation

All Models

All Heated Merchandising Cabinets have an air heating system, humidity system with low water control protection, fluorescent lamps, tempered glass sides, and a door. The standard access door can be hinged left or right. The pretzel tree display rack is stainless steel and the other display racks are nickel-plated. All units are available in several Designer colors.

Model HMC-1

Model HMC-1 is a single door model with a motorized rotating display. It comes standard with a pizza rack that holds up to four (4) round pizza pans with a maximum diameter of 15″ (381 mm). The rotating rack stops automatically when the door is opened. Additional rack options are available. Refer to the OPTIONS AND ACCESSORIES section for details.

Model HMC-1X

The HMC-1X is similar to the HMC-1, but features a stationary 4-slot pan rack instead of the rotating display. The rack can hold pans with a maximum width of 13″ (330 mm) and a depth of 18″ (457 mm). Additional rack options are available. Refer to the OPTIONS AND ACCESSORIES section for details.

Figure 1. HMC-1

NOTE: Model HMC-1 cannot be converted to a model

HMC-2 or HMC-2X.

Model HMC-2

The HMC-2 is the same as model HMC-1, but has an additional door on the opposite side of the controls for pass-through convenience.

MODEL DESIGNATION

Figure 2. HMC-1X

NOTE: Model HMC-1X cannot be converted to a model HMC-

1, HMC-2, or HMC-2X.

Model HMC-2X

The HMC-2X is the same as model HMC-1X, but has an additional door on the opposite side of the controls for passthrough convenience.

NOTE: Model HMC-2X cannot be converted to a model

HMC-2.

Figure 3. Model Designation

Form No. HMCM-0210

SPECIFICATIONS

WARNING

NEMA 5-15P

CEE 7/7 Schuko AS-3112

BS-1363

Plug Configurations

Units are supplied from the factory with an electrical cord and plug installed. Plugs are supplied according to the applications.

ELECTRIC SHOCK HAZARD: Plug unit into a properly grounded electrical receptacle of the correct voltage, size, and plug configuration. If plug and receptacle do not match, contact a qualified electrician to determine and install the proper voltage and size electrical receptacle.

NOTE: The specification label is located on the ceiling sheet

Electrical Rating Chart

inside the unit. See label for serial number and verification of unit electrical information.

NOTE: Receptacle not supplied by Merco.

Model Voltage Hertz Watts Amps Plug Configurations Shipping Weight

HMC-1, -1X 120 60 1440 12.0 NEMA 5-15P 120 lbs. (54 kg)

(with humidity) 220 50/60 1440 6.5 CEE 7/7 Schuko, BS-1363, AS 3112 120 lbs. (54 kg)

240 50/60 1440 6.0 CEE 7/7 Schuko, BS-1363, AS 3112 120 lbs. (54 kg) 220–230 (CE) 50/60 1440–1574 6.5–6.8 CEE 7/7 Schuko, BS-1363, AS 3112 120 lbs. (54 kg) 230–240 (CE) 50/60 1323–1440 5.8–6.0 CEE 7/7 Schuko, BS-1363, AS 3112 120 lbs. (54 kg)

Figure 4. Plug Configurations

HMC-1, -1X 120 60 1115 9.3 NEMA 5-15P 120 lbs. (54 kg)

(no humidity) 220 50/60 1115 5.1 CEE 7/7 Schuko, BS-1363, AS 3112 120 lbs. (54 kg)

240 50/60 1115 4.6 CEE 7/7 Schuko, BS-1363, AS 3112 120 lbs. (54 kg) 220–230 (CE) 50/60 1115–1219 5.1–5.3 CEE 7/7 Schuko, BS-1363, AS 3112 120 lbs. (54 kg) 230–240 (CE) 50/60 1025–1115 4.5–4.6 CEE 7/7 Schuko, BS-1363, AS 3112 120 lbs. (54 kg)

HMC-2, -2X 120 60 1440 12.0 NEMA 5-15P 122 lbs. (55 kg)

(with humidity) 220 50/60 1440 6.5 CEE 7/7 Schuko, BS-1363, AS 3112 122 lbs. (55 kg)

240 50/60 1440 6.0 CEE 7/7 Schuko, BS-1363, AS 3112 122 lbs. (55 kg) 220–230 (CE) 50/60 1440–1574 6.5–6.8 CEE 7/7 Schuko, BS-1363, AS 3112 122 lbs. (55 kg) 230–240 (CE) 50/60 1323–1440 5.8–6.0 CEE 7/7 Schuko, BS-1363, AS 3112 122 lbs. (55 kg)

HMC-2, -2X 120 60 1115 9.3 NEMA 5-15P 122 lbs. (55 kg)

(no humidity) 220 50/60 1115 5.1 CEE 7/7 Schuko, BS-1363, AS 3112 122 lbs. (55 kg)

240 50/60 1115 4.6 CEE 7/7 Schuko, BS-1363, AS 3112 122 lbs. (55 kg) 220–230 (CE) 50/60 1115–1219 5.1–5.3 CEE 7/7 Schuko, BS-1363, AS 3112 122 lbs. (55 kg) 230–240 (CE) 50/60 1025–1115 4.5–4.6 CEE 7/7 Schuko, BS-1363, AS 3112 122 lbs. (55 kg)

The shaded areas contain electrical information for International models only.

Form No. HMCM-0210

SPECIFICATIONS

A B

Front View SideView

Dimensions

Width Depth Height*

Model (A) (B) (C)

HMC-1 22-1/2″ 24″ 32-9/16″

(572 mm) (610 mm) (827 mm)

HMC-1X 22-1/2″ 24″ 32-9/16″

(572 mm) (610 mm) (827 mm)

HMC-2 22-1/2″ 25-3/8″ 32-9/16″

(572 mm) (645 mm) (827 mm)

HMC-2X 22-1/2″ 25-3/8″ 32-9/16″

(572 mm) (645 mm) (827 mm)

Cabinet Opening (all models): 19″W x 23-3/4″H (483 x 603 mm)

* Add 4″ (102 mm) to the height of the unit if the 4″ leg option

is installed.

Figure 5. Dimensions

Form No. HMCM-0210

INSTALLATION

CAUTION

WARNING

General

Heated Merchandising Cabinets are shipped with most components installed and ready for operation. The following installation instructions must be performed before plugging in and operating the cabinet.

ELECTRIC SHOCK HAZARD: Unit is not weatherproof. Locate unit indoors where the ambient air temperature is a minimum of 70°F (21°C).

FIRE HAZARD: Locate unit a minimum of 2″ (51 mm) from combustible walls and materials. If safe distances are not maintained, discoloration or combustion could occur.

1. Remove the unit from the carton. Two people are required for this step.

2. Remove the information packet.

NOTE: To prevent delay in obtaining warranty coverage, fill out

and mail in the warranty card to Merco.

3. Remove tape and protective packaging from all surfaces of

the unit, shelves, and any accessories.

• Floor Sheet — The stainless steel floor in all cabinets is protected during shipping with a sheet of corrugated cardboard. This protection must be removed prior to cabinet operation.

• Display Rack — The display rack has packing material and cardboard attached for protection during shipping. This protection must be removed prior to cabinet operation.

• Legs — The cabinets are shipped with four rubber feet attached to the bottom of the unit. For cabinets with the optional 4″ (102 mm) adjustable legs, see the Options and ACCESSORIES section for installation instructions.

NOTE: If installing 4″ (102 mm) legs, do not remove glass

protection until leg installation is complete. See the OPTIONS AND ACCESSORIES section for installation instructions.

• Glass Panels — The cabinets have tempered glass panels that are protected during shipping using foam sheets along the glass edges and tape to hold the panels securely. The sheets and tape must be removed prior to cabinet operation.

To remove a glass panel, grasp the panel firmly from inside and outside of the cabinet. Lift up and out of the bottom channel, then carefully lower the glass panel until it clears the upper channel.

To reinstall, position the glass panel top edge under the cabinet lip. Raise the panel until it clears the bottom channel, then carefully lower the panel until it rests in the bottom channel.

4. Place the unit in the desired location. Two people are required for this step.

• Locate the unit in an area where the ambient air temperature is constant and a minimum of 70° F (21° C). Avoid areas that may be subject to active air movements or currents (i.e., near exhaust fans/hoods and air conditioning ducts).

• Make sure the unit is at the proper counter height in an area convenient for use.

• Make sure the countertop is level and strong enough to support the weight of the unit and food product.

Form No. HMCM-0210

INSTALLATION

Hinge Assembly

Bottom Hinge Pin Screw and Nylon Washer(s)

Door Rotated 180°

Top Hinge Pin Screw

Striker Plate and

Hardware

Reversing the Access Door

The Heated Merchandising Cabinet access door(s) may be hinged on either the left or right side for convenience. Use the following procedure to reverse the access door.

NOTE: For models equipped with a motorized rotating rack

(HMC-1 and HMC-2), the “Relocating the Proximity Switch” procedure in this section must be performed after reversing the access door(s).

1. Remove the top hinge pin screw holding the door to the hinge.

2. Tip the door assembly forward (away from cabinet) and lift gently to clear the bottom hinge assembly. Remove the nylon washer(s).

3. Reinstall the top hinge pin screw that was removed in Step 1.

4. Remove the screws holding the hinges to the cabinet.

5. Remove the screws from the striker plates on the non-hinge side of the cabinet.

6. Install the striker plates on the opposite side of the cabinet where the hinges were previously mounted.

7. Install the hinges on the opposite side of the cabinet where the striker plates were previously mounted using the original hinge mounting screws.

8. Carefully rotate the door 180°.

9. Remove the hinge pin screw from the end that is now the top.

10. Carefully place the door assembly with the nylon washer(s) into the bottom hinge.

11. Tip/tilt the door assembly towards the cabinet and align the door top with the hinge. Reinstall the top door hinge pin screw through the hinged and into the door top.

Figure 6. Reversing the Access Door

Form No. HMCM-0210

INSTALLATION

Proximity Switch

Orientation with Door

Opening from Left

(Hinged Right)

Proximity Switch

Orientation with Door

Opening from Right

(Hinged Left)

Screw

Relocating the Proximity Switch

(Rotating Rack Models Only)

Units equipped with a rotating rack will require relocating the proximity switch(es) after reversing the door(s).

The proximity switch signals the rack motor to stop when a door is opened and to start when the door is closed. Follow the steps listed below to move the proximity switch(es) to the proper position after reversing the door(s). Unit requires one switch per door.

1. Turn off the unit. Unplug the unit from the power source.

2. Remove the four screws and top cover.

3. Remove the screw and nut securing the proximity switch to the cabinet ceiling sheet. The screw is accessed from inside the cabinet. Reinstall screw and nut into hole after removing switch.

4. Cut the cable tie securing the proximity switch wires to the wiring harness. Mark the two wires for reassembly and unplug the wires from the proximity switch wire leads. Route the wires to the opposite corner and reattach the wires to the switch wire leads.

NOTE: Make sure to install the proximity switch in the

orientation shown below for the specific installation location. Incorrect orientation will result in malfunction of the proximity switch.

5. Remove the screw and nut from the new mounting hole. Secure the proximity switch to the mounting hole with the screw and nut. Make sure to maintain proper switch orientation when tightening the hardware.

6. Make sure wires do not interfere with the other components inside the cabinet, then secure switch wires to wiring harness with a cable tie (not supplied).

NOTE: On models equipped with two doors, it may be

necessary to move the air chamber to access the proximity switch on the customer-side door. Drain all water from the unit, remove the drain plug from inside the cabinet, and remove the four screws securing the air chamber assembly to the cabinet. Carefully move the air chamber out of the way to access the proximity switch. Reassemble after relocating switch.

7. Install the top cover and four screws.

8. Plug the unit into the proper power source.

9. Turn on the unit and test the operation of the proximity switch(es) by making sure the rack rotates when the doors are closed and stops rotating when a door is opened.

Form No. HMCM-0210

Figure 7. Relocating the Proximity Switch

OPERATION

Fill Cup

NOTICE

WARNING

General

Use the following procedures to operate the Heated Merchandising Cabinet.

Read all safety messages in the IMPORTANT SAFETY INFORMATION section before operating this equipment.

Startup

1. Plug unit into a properly grounded electrical receptacle of the correct voltage, size and plug configuration. See the SPECIFICATIONS section for details.

2. Move the Power ON/OFF switch to the ON position.

• The display lights will turn on and the heating system will start up.

• The cabinet temperature display will flash “LO H2O” four times and then flash the cabinet temperature. It will continue to alternate this way until the water reservoir is filled. Once the reservoir is full, “LO H2O” will stop flashing and the display will show the cabinet temperature.

Do not use deionized water. Deionized water will shorten the life of the water pan and heating element.

NOTE: Unit failure caused by deionized water is not covered by

warranty.

3. Fill the water reservoir with clean water. To fill the reservoir:

a. Lift up the fill cup cover and pull

forward.

b. Slowly pour the water into the cup

until “LO H2O” stops flashing on the cabinet temperature display.

*IMPORTANT NOTE*

When using distilled water, add one teaspoon of salt to the water reservoir during the initial water fill only. This will ensure proper operation of the water level sensors.

ELECTRIC SHOCK HAZARD: Do not overfill water reservoir. Overfilling can cause electrical shock. Water reservoir is full when “LO H2O” stops flashing on CABINET TEMPERATURE display. Stop filling when “LO H2O” stops flashing on display.

NOTE: On the initial fill, the water reservoir capacity is one

gallon or 4 quarts (3.8 liters).

4. Set the humidity to the desired level (refer to the “Setting the Humidity Level” procedure in this section). See the “Food Holding Guide” for recommendations.

5. Set the air temperature to the desired temperature (refer to the “Setting the Air Temperature” procedure in this section). See the “Food Holding Guide” for recommendations.

6. Allow 30 minutes to heat the cabinet and a full reservoir of water, and then load the cabinet with pre-heated food product.

BURN HAZARD: Some exterior surfaces on the unit will get hot. Use caution when touching these areas.

Setting the Air Temperature

1. Press theAIRTEMPERATURE key to enter temperature mode (“tSP” will appear on the CABINET TEMPERATURE display).

2. Press the AIR TEMPERATURE key again to show the current temperature setting.

3. Press the Up Arrow key or Down Arrow key to reach the desired temperature. The temperature range is 80°–195°F (27°–91°C) in single degree increments. See the “Food Holding Guide” in this section for recommendations.

4. After the desired temperature is set, wait 15 seconds without pushing any keys for the cabinet temperature display to return automatically to operational mode.

Figure 8. Heated Merchandising Cabinet Control Panel

Form No. HMCM-0210

OPERATION

Setting the Humidity Level

1. Press the HUMIDITY key to enter humidity mode (“hSP” will appear on the CABINET TEMPERATURE display).

2. Press the HUMIDITY key again to show the current humidity level.

3. Press the Up Arrow key or Down Arrow key to reach the desired humidity level. Humidity range is 1 through 5 (1 is the lowest amount of humidity and 5 is the highest). See the “Food Holding Guide” in this section for recommendations.

4. After the desired humidity level is set, wait 15 seconds without pushing any keys for the CABINET TEMPERATURE display to return automatically to operational mode.

NOTE: Temperature and humidity settings may vary depending

upon product make-up and consistency. The CABINET TEMPERATURE display shows the lowest temperature point inside the cabinet, not the product temperature.

The capacity of the water reservoir permits uninterrupted operation for approximately 4–8 hours, depending on the settings and how frequently the door is opened. When “LO H2O” is flashing on the CABINET TEMPERATURE display, add water to the reservoir. The water reservoir refill capacity is approximately 96 ounces, or 3 quarts (2.8 liters). WARNING:

ELECTRIC SHOCK HAZARD — Do not overfill water reservoir.

Figure 9. Setting the Humidity Level

Food Holding Guide

Maximum Humidity Temperature

Type of Food Holding Time Setting °F °C

Biscuits 4 Hours 4 130 55

Chicken Pieces (Fried) 4 Hours 5 175 80

Croissants 4 Hours 1 140 60

Fruit Pies 3-1/2 Hours 4 140 60

Onion Rings 1/2 to 1 Hour 1 175 80

Pizza — Thick Crust 1 Hour 4 185 85

Thin Crust 1 Hour 5 180 82

Pretzels 3 Hours 4 140 60

Wrapped Sandwiches 2 Hours 4 180 82

NOTE: All times and settings are recommendations only and may vary depending on product preparation, cooking time, and

internal food temperature.

Form No. HMCM-0210

MAINTENANCE

NOTICE

WARNING

Connecting

Bottom

Point

Connecting Coupling

Rack Shaft

General

Merco Heated Merchandising Cabinets are designed for maximum durability and performance, with minimum maintenance.

ELECTRIC SHOCK HAZARD:

• Turn the power switch OFF, unplug the power cord, and allow the unit to cool before performing any maintenance or cleaning.

• DO NOT submerge or saturate with water. Unit is not waterproof. Do not operate if unit has been submerged or saturated with water.

• Do not steam clean or use excessive water on unit.

• Use only OEM Replacement Parts when service is required. Failure to use OEM Replacement Parts will void all warranties and may subject operators of the equipment to hazardous electrical voltage, resulting in electrical shock or burn. OEM Replacement Parts are specified to operate safely in the environments in which they are used. Some aftermarket or generic replacement parts do not have the characteristics that will allow them to operate safely in Merco equipment.

This unit has no “user-serviceable” parts. If service is required on this unit, contact a Factory Authorized Service Agent or contact the Merco Service Department at 800-506-9565.

Removing the Glass Panels

1. Lift the glass panel out of the bottom channel of the cabinet.

2. Pull the lower edge away from the cabinet.

3. Carefully lower the glass until the top clears the cabinet.

Replacing the Glass Panel

1. Position the glass panel with the top edge under the top cabinet lip, and raise the glass until it clears the bottom channel of the cabinet.

2. Move the bottom of the glass towards the cabinet until the glass rests against the cabinet frame.

3. Carefully lower the glass until it rests in the bottom channel of the cabinet.

Removing the Rotating Rack

(Models HMC-1 and HMC-2)

1. Open the front access door.

2. Remove the two (2) connecting pins from the connecting coupling located at the top of the rack inside the cabinet.

3. Lower the connecting coupling until it is free of the motor shaft and remove the rack from the cabinet.

Cleaning

To preserve the finish of the Heated Merchandising Cabinet, perform the following cleaning procedure daily.

Use non-abrasive cleaners only. Abrasive cleaners could scratch the finish of the unit, marring its appearance and making it susceptible to soil accumulation.

NOTE: Both the rotating display rack and the stationary rack

1. Turn off the unit, unplug the power cord, and allow the unit to cool.

2. Remove and wash all food pans.

3. Wipe down all interior and exterior metal surfaces with a damp cloth. Stubborn stains may be removed with a good non-abrasive cleaner. Clean hard to reach areas using a small brush and mild soap.

are removable for cleaning, if necessary. Refer to the “Removing the Rotating Rack” procedure in this section for removal.

4. Clean the glass side panels and door panel(s) using ordinary glass cleaner and a damp, soft cloth or paper towel. The side panels are removable for detailed cleaning, if necessary. Refer to the “Removing the Glass Panels” procedure in this section for removal.

Figure 10. Removing Motorized Display Racks

Replacing the Rotating Rack

1. With the connecting coupling in position on the top rack shaft, insert the rack into the cabinet through the access door and place the rack bottom point in the dimple located at the center of the cabinet floor.

2. Slide the connecting coupling up onto the motor shaft and align the coupling holes.

3. Insert the two (2) connecting pins. The top connecting pin goes through the connecting coupling and the motor shaft. The bottom connecting pin goes through the connecting coupling and the rack shaft.

Form No. HMCM-0210

MAINTENANCE

Valve Open

Valve Closed

WARNING

Draining the Water Reservoir

The water reservoir in humidified units must be drained prior to moving the cabinet as well as during the “Removing Lime and Mineral Deposits” procedure.

ELECTRIC SHOCK HAZARD: Turn the power switch OFF, unplug the power cord, and allow the unit to cool before performing any maintenance or cleaning.

1. Move the POWER ON/OFF switch to the OFF position and unplug the power cord. Allow the unit to cool.

2. Locate the valve inside the cabinet on the underside of the ceiling sheet. CAUTION: BURN HAZARD — Ceiling sheet

and water in reservoir are hot during operation. Allow to cool before draining.

3. Position a one gallon (four liter) container under the valve.

4. Turn the valve handle from the horizontal position (closed) to the vertical position (open) to drain the reservoir.

5. Once the reservoir is empty, return the valve handle to the closed position.

Removing Lime and Mineral Deposits

Use the following procedure for periodic cleaning and de-liming of the water reservoir in humidified units.

NOTE: The lime and mineral content of the water used for daily

operation will determine how often the deliming procedure must be performed.

NOTE: Perform this procedure when the unit will not be used

for a period of time, such as the end of the day.

1. Move the POWER ON/OFF switch to the OFF position and unplug the power cord. Allow the unit to cool.

2. After the unit has cooled down, perform the “Draining the Water Reservoir” procedure in this section.

3. Fill the water reservoir with a mixture of 75% water and 25% white vinegar. Do not use flavored vinegar.

4. Plug in and turn on the unit.

5. Set both the air temperature and humidity to their highest settings and allow the unit to run for 30 minutes.

6. Move the POWER ON/OFF switch to the OFF position and unplug the power cord. Allow the unit to cool.

7. Perform the “Draining the Water Reservoir” procedure to empty the deliming solution from the water reservoir.

8. Continue to fill and drain the water reservoir with clean water until the deliming solution is rinsed through and the reservoir is clean.

9. Plug the unit into its power source and fill the reservoir as usual for daily operation using the procedure in the OPERATION section of this manual.

Figure 11. Draining Reservoir Valve

NOTE: If the water used has an excessive amount of lime or

mineral content, follow the REMOVING LIME AND MINERAL DEPOSITS procedure for periodic cleaning and deliming of the water reservoir.

NOTE: Unit failure caused by liming or sediment buildup is not

covered under warranty.

Replacing A Display Light

Make sure protective lamp cover(s) are installed in front of fluorescent lamp(s). Breakage of fluorescent lamps not properly protected could result in personal injury and/or food contamination.

The unit is equipped with two fluorescent lamps that illuminate the warming area. These lamps have a special lamp cover to guard against injury and food contamination in the event of breakage. When replacing a fluorescent lamp, use P/N

02.30.074.00. Use the following procedure to replace a fluorescent lamp.

1. Turn off the unit, unplug the power cord, and allow the unit to cool.

2. Remove the lamp cover from in front of the fluorescent lamp.

3. Carefully twist the fluorescent lamp and pull out to remove it from the sockets on each end.

4. Align the tabs on each end of the new fluorescent lamp with the channels on each socket, and push the lamp into the sockets.

5. Carefully twist the fluorescent lamp in the sockets until it “snaps” into position.

6. Replace the lamp cover in front of the fluorescent lamp.

Form No. HMCM-0210

TROUBLESHOOTING GUIDE

WARNING

This unit must be serviced by trained and qualified personnel only. Service by unqualified personnel may lead to electric shock or burn.

Symptom Probable Cause Corrective Action

Fluorescent lamp not working.

Unit operates, but is not circulating air inside cabinet.

Unit is plugged in, but nothing works.

Unit is operational, but rotating rack (if equipped) does not turn.

Lamp loose or defective.

Blower motor is defective.

The correct voltage may not be supplied to blower.

No power to unit.

Power cord connections are loose or disconnected.

Power cord is damaged. Contact Factory Authorized Service Agent or

Defective ON/OFF switch.

Proximity switch was not relocated after door reversal.

ELECTRIC SHOCK HAZARD: Turn the power switch OFF, unplug the power cord, and allow the unit to cool before performing any maintenance or cleaning.

Re-install or replace fluorescent lamp.

Contact Factory Authorized Service Agent or Merco for assistance.

Check electrical receptacle and verify that power supply matches specifications on unit. If receptacle is not working, check circuit breaker and reset, or plug unit into a different known working receptacle.

Contact Factory Authorized Service Agent or Merco for assistance.

Merco for assistance.

Contact Factory Authorized Service Agent or Merco for assistance.

See “Relocating the Proximity Switch” in the INSTALLATION section of this manual.

Proximity magnet or proximity switch not working properly.

Incorrect voltage is supplied to rack motor.

Unit is not producing any “hot air” inside cabinet.

Unit is heating, but is not producing humidity inside cabinet. Low water light is off, and unit is full of water.

Unit is heating, but is not producing humidity inside cabinet. Low water light is on and unit is full of water.

Safety high-limit is tripped or open. Contact Factory Authorized Service Agent or

Incorrect voltage supplied to heating element.

Blower motor is not working.

Air heating element is defective. Contact Factory Authorized Service Agent or

Incorrect voltage supplied to water heating element or heating element is defective.

When using distilled water, no minerals are being sensed by low water probe.

Low water protection system is malfunctioning.

Error Codes

The following error codes may appear on the digital display to indicate an error in the operating condition of the unit.

LO H20 = Low water probe does not detect water. Refill water

reservoir — refer to instructions in OPERATION section of this manual.

Contact Factory Authorized Service Agent or Merco for assistance.

Merco for assistance.

Contact Factory Authorized Service Agent or Merco for assistance.

Check blower motor — refer to Symptom “Unit operates, but is not circulating air inside cabinet.”

Merco for assistance.

Contact Factory Authorized Service Agent or Merco for assistance.

On initial fill, add one teaspoon of salt to the water reservoir.

Contact Factory Authorized Service Agent or Merco for assistance.

E1 = Air temperature sensor malfunctioning. Contact Factory

Authorized Service Agent or Merco for assistance.

E2 = Humidity temperature sensor malfunctioning. Contact

FactoryAuthorized Service Agent or Merco for assistance.

E4 = Water level probe(s) malfunctioning. Contact Factory

Authorized Service Agent or Merco for assistance.

Form No. HMCM-0210

OPTIONS AND ACCESSORIES

Decal

Lengthen

Shorten

Adjustable Tip

Corner Bracket

Rubber

Foot

4″ Leg

Motorless

Rack Coupling

4-Tier Circle Rack*

Top two tiers: 5”

(127 mm) on center.

Bottom two tiers: 5-1/4”

(133 mm) on center.

4-Tier Circle Rack*

Top two tiers: 5”

(127 mm) on center.

Bottom two tiers: 5-1/4”

(133 mm) on center.

7-Shelf

Multi-Purpose Rack

Shelves 1 & 5: 2-3/4” (70 mm) on center.

NOTE: Shelf 1 is the bottom shelf.

Shelves 2, 3 & 6: 3” (76 mm) on center.

Shelf 4: 3-1/4” (83 mm) on center.

Shelves 2, 3, 4, 6 & 7 are removable.

5-Shelf Angle Rack

All shelves 3-3/4”

(95 mm) on center.

All shelves are

removable.

4-Tier Pan Rack

Top tier: 4” (102 mm)

on center.

All others: 4-14”

(108 mm) on center.

3-Shelf Angle Rack

Top tier: 5” (127 mm)

on center.

All others: 5-1/4”

(133 mm) on center.

Middle shelf is removable.

Rack shelves slant

at 15° angle.

*Racks designed for use

with motorized display.

5-Tier Circle Rack*

All tiers: 4” (102 mm)

on center.

4″ (102 mm) Adjustable Legs

The 4″ (102 mm) adjustable legs are used to add additional height to the unit.

1. Secure all glass sides and doors with tape. Lay the unit on its side.

2. Remove the four screw-type rubber feet from the corner brackets.

3. Screw the 4″ (102 mm) legs into the holes in the middle of each corner bracket. After all the legs are tightened, return the unit to its upright position. If the unit is not level or rocks, turn the adjustable tip of the appropriate leg to level the unit.

Display Racks

Several styles of display racks are available to “customize” Heated Merchandising Cabinets to each foodservice operation.

Figure 12. Installation of 4″ Legs

Merchandising Decal

Self-adhesive merchandising decals are available to promote food products. The decals are designed to be installed on three (3) sides of the cabinet above the glass panels.

Decal Installation

1. Before installing decals, clean the side panels with a nonoily cleaner, such as isopropyl alcohol (rubbing alcohol).

2. After the cleaned surfaces have dried, remove the protective backing from the decal and apply to the panel.

3. Any air pockets or bubbles behind the sticker can be removed by rubbing gently with a soft cloth from the center towards the outer edges.

Form No. HMCM-0210

Figure 13. Decal Installation

Figure 14. Display Racks

Motorless Rack Coupling

The motorless rack coupling allows the stationary installation of a 4-tier circle rack or 3-tier pretzel tree in cabinets that do not have a rack motor (HMC-1X and HMC-2X).

MERCO LIMITED WARRANTY

1. PRODUCT WARRANTY

Merco LLC (“Merco”), warrants the products that it manufactures (the “Products”) to be free from defects in materials and workmanship, under normal use and service, for a period of one (1) year from the date of purchase when installed and maintained in accordance with Merco’s written instructions or 18 months from the date of shipment from Merco. Buyer must establish the Product’s purchase date by returning Merco’s Warranty Registration Card or by other means satisfactory to Merco in its sole discretion.

Merco warrants the following Product components to be free from defects in materials and workmanship from the date of purchase (subject to the foregoing conditions) for the period(s) of time and on the conditions listed below:

a) One (1) Year Parts and Labor PLUS One

(1) Additional Year Parts-Only Warranty:

Heated Drawer Elements (metal sheathed) Heated Drawer Rollers and Slides Convenience Merchandiser Elements (metal sheathed) Heated Merchandising Cabinet Elements

(metal sheathed air heating)

b) Ninety (90) Day Parts-Only Warranty:

Replacement Parts

THE FOREGOING WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ANY OTHER WARRANTY, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR PATENT OR OTHER INTELLECTUAL PROPERTY RIGHT INFRINGEMENT. Without limiting the generality of the foregoing, SUCH WARRANTIES DO NOT COVER: Coated incandescent light bulbs, fluorescent lights, decorative heat lamp bulbs, glass components, and fuses; Product failure in water heating equipment caused by liming, sediment buildup, chemical attack, or freezing; or Product misuse, tampering or misapplication, improper installation, or application of improper voltage.

2. LIMITATION OF REMEDIES AND DAMAGES

Merco’s liability and Buyer’s exclusive remedy hereunder will be limited solely, at Merco’s option, to repair or replacement using new or refurbished parts or Product by Merco or a factory authorized service agency (other than where Buyer is located outside of the United States, Canada, United Kingdom, or Australia, in which case Merco’s liability and Buyer’s exclusive remedy hereunder will be limited solely to replacement of part under warranty) with respect to any claim made within the applicable warranty period referred to above. Merco reserves the right to accept or reject any such claim in whole or in part. In the context of this Limited Warranty, “refurbished” means a part or Product that has been returned to its original specifications by Merco or a factory authorized service agency. Merco will not accept the return of any Product without prior written approval from Merco, and all such approved returns shall be made at Buyer’s sole expense. MERCO WILL NOT BE LIABLE, UNDER ANY CIRCUMSTANCES, FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, INCLUDING BUT NOT LIMITED TO LABOR COSTS OR LOST PROFITS RESULTING FROM THE USE OF OR INABILITY TO USE THE PRODUCTS OR FROM THE PRODUCTS BEING INCORPORATED IN OR BECOMING A COMPONENT OF ANY OTHER PRODUCT OR GOODS.

Merco, LLC 1111 North Hadley Road Fort Wayne, Indiana 46804 USA Technical Support: 800.506.9565 Customer Service: 888.417.5462

www.mercoproducts.com

Printed in U.S.A. February 2010 Part No. 07.04.499.00 Form No. HMCM-0210

Merco HMC Series Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual