Merco / Savory DH User manual

Brand: Merco / Savory

Model: DH

Type: User manual

PARTS & SERVICE MANUAL for the DH Series

Display and Hold Cabinets

The DH Series Display & Hold Cabinets are engi-

neered for efficient, dependable service and to be

trouble free throughout the years. Like any piece

of fine equipment with moving parts and broad

temperatures ranges, physical wear takes its toll.

When this happens, the information found in this

Manual will prove very helpful. Although the

instructions are easy to follow, all repair proce-

dures should be carried out by a qualified Savory

Certified Service Representative.

THIS MANUAL SHOULD BE RETAINED FOR FUTURE USE

0101-JDM 07142

CAUTION

UNPLUG UNIT AND ALLOW TO COOL

BEFORE ATTEMPTING ANY SERVICE

PROCEDURES IN THIS MANUAL

NOTE: To gain access to internal compo-

nents of this unit, remove the 2 screws

securing top cover to unit and remove cover.

A Main Power Switch

(Figure 1)

1. Disconnect the wire leads from switch noting

proper orientation.

2. Squeeze ends of switch and push through

front of control panel.

3. Refer to wiring diagram when installing new

switch.

B Thermometer

(Figure 1 & 2)

1. Open front door of unit and remove the sheet

metal screw securing the temperature sensor

probe to the inside of the right front upright

post.

2. Remove sealastic compound securing capillary

tubing to upper right front upright post.

3. Cut wire tie securing capillary tube to unit.

Note proper orientation of tube placement.

4. Squeeze tabs on back of thermometer and

carefully push thermometer through front of

control panel.

5. NOTE: Capillary tube and temperature

bulb are removed with the thermometer.

C Heat On Indicator Light

(Figure 1)

1. Disconnect wire leads from back of light noting proper

orientation.

2. Squeezing tabs on light, push through front of control

panel.

3. Refer to wiring diagram when installing new light.

D Add Water Indicator Light

(Figure 1)

1. Disconnect wire leads from back of light noting proper

orientation.

2. Squeezing tabs on light, push through front of control

panel.

3. Refer to wiring diagram when installing new light.

E P.C. Board

(Figure 3 & 5)

1. Disconnect the wire leads from back of Add Water

indicator light.

2. Disconnect the wire lead from back of Heat On indicator

light.

3. Disconnect wire leads from back of P.C. board.

4. Disconnect sensor board from back of P.C. board.

5. Disconnect three sensor wires from top of water tank.

6. Remove the 4 nuts from the mounting stud screws and

remove P.C. board. Note proper orientation of spac-

ers.

7. Refer to wiring diagram when installing new P.C. board.

F Terminal Block

(Figure 5)

1. Disconnect all wires from terminal block.

2. Remove nuts from stud screws and remove terminal

block.

3. Refer to wiring diagram when installing new terminal

block.

G Ballast

(Figure 3 & 4)

1. Disconnect wire leads at both terminal blocks.

2. Cut yellow, red and blue/white wire leads at the lamp

holder sockets. Leave approximately 6” of wire at the

sockets.

3. Disconnect blue wires at wire nuts.

4. Remove 4 mounting screws securing ballast to floor on

unit. Note proper orientation of spacers.

5. When installing new ballast, connect existing

wiring ends with new wiring from ballast using

wire nuts.

6. Refer to wiring diagram when installing new

ballast.

7. Be sure all wiring is secured with ties in original

position.

H Gear Motor/Rack Adaptor

(Figure 5 & 7)

1. Disconnect wire leads at pigtail terminals.

2. Remove 4 motor mounting screws.

3. Replace rack adaptor if necessary.

4. Refer to wiring diagram when installing new gear motor.

I Door Switch

(Figure 1)

1. Remove wires from back of switch.

2. Carefully squeeze back of switch and push through

front of control panel.

3. Refer to wiring diagram to install new switch.

J Water Tank/Solenoid Valve

(Figure 5 & 6)

1. Remove 3 sheet metal screws securing sensors to

top of water tank.

2. Remove top cover on water tank.

3. WARNING: SIPHON ALL WATER FROM TANK.

DO NOT ALLOW WATER TO COME IN CONTACT

WITH WIRING.

4. Disconnect solenoid wire leads at P.C. board.

5. Loosen hose clamp on solenoid hose.

6. Remove mounting screws from side of unit and

carefully slide tank with solenoid attached from unit.

7. Remove solenoid from water tank and replace if

needed.

8. When attaching new solenoid to water tank, do NOT

over-tighten nuts, as this may cause leakage.

9. Refer to wiring diagram when installing new tank or

solenoid valve.

K Heating Element

(Figure 5)

1. Disconnect wires from heating element terminals.

2. Remove nut securing mounting bracket to wall of

unit.

3. Carefully slide element from unit.

4. Refer to wiring diagram when installing new ele-

ments.

L Blower Motor Assembly

(Figure 3)

1. Remove fan.

2. Disconnect wire leads from terminal blocks.

3. Remove 2 sheet metal screws securing blower motor

assembly to side of unit and lift assembly out from unit.

4. Remove the 4 mounting nuts and separate housing from

motor assembly.

5. At this point check to see if your unit has a 2” ventilation

hole. Refer to Section M for location & bearing lubrica-

tion information.

6. Refer to wiring diagram when installing new motor

assembly.

M Blower Motor Bearing Access and

Ventilation Hole

(Figure 7, 8 & 9)

1. Disconnect unit from power source and

allow to cool thoroughly before proceeding

with this service operation.

2. Remove top cover. Remove lexan panels,

merchandising panels and flourescent

bulb from area involved.

3. Remove 10 sheet metal screws securing

cover to air box assembly and remove

cover. (Figure 7)

4. Remove the 2 sheet metal screws secur-

ing blower motor to side of unit. (Figure

5. Lift blower motor up and move away from

corner of unit. Do NOT disconnect any

wiring from motor.

6. CAUTION: To prevent debris from getting

into the food chamber, completely cover

warm air return hole in component plate

with a piece of duct tape. (Figure 8)

7. Using a hole saw or Greenly punch, place

a 2-1/8” diameter hole into side of unit as

shown in Figure 8.

8. IMPORTANT: REMOVE TAPE FROM

AIR RETURN HOLE and clean out any

debris from area before returning blower

motor to original position.

9. Return blower motor to original position

and reattach to side of unit. Replace air

box cover.

10. Remove the rubber plug in the blower

motor bearing and add 1 drop of SAE 20

non-detergent oil. Replace rubber plug.

(Figure 9)

11. Replace fluorescent bulb, lexan panels,

merchandising panels and top cover.

NOTE: PERIODIC LUBRICATION OF THE

BEARING IS NECESSARY. THIS SHOULD

BE INCLUDED WITH ANY PREVENTATIVE

MAINTENANCE PROGRAM.

N Steam Generator

(Figure 3, 5 & 6)

1. Remove 10 sheet metal screws securing outer

cover and remove cover.

2. Remove 4 sheet metal screws securing inner cover

and remove cover.

3. Disconnect all wire leads from steam generator.

4. Loosen hose clamp on solenoid tube and fitting (at

generator end).

5. Remove the 4 mounting nuts securing generator to

floor of unit.

6. Refer to wiring diagram when installing new genera-

tor.

0 Interior Lamp Sockets

(Figure 10)

1. Remove 60 W lamp and unscrew ceramic socket.

2. The entire top portion of the unit must be removed

to gain access to the socket. Remove all the sheet

metal screws around the perimeter of the top

control box.

3. Carefully lift up top.

4. Disconnect socket wires at wire nuts. (Models prior

to 6/92)

5. Refer to wiring diagram when replacing sockets.

6. CAUTION: Replace lamps with Savory Part

#45025. These light bulbs have a hi-tempera-

ture silicone coating to help prevent breakage.

P Power Cord

1. Remove sheet metal screws securing bottom cover

to unit.

2. Disconnect wiring at wire nut connections.

3. Squeeze strain relief bushing and push through

panel.

4. Refer to wiring diagram when installing new power

cord.

1111 N. Hadley Rd.

Fort Wayne, In. 46804

Tel. 800-701-2992 www.mercosavory.com

Fax (219) 436-0735

Merco / Savory DH User manual

Merco / Savory DH User manual

Merco / Savory DH User manual

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