Middleby Marshall PS629G Series, Owner'S Operating & Installation Manual

Page: 33 / 52

SECTION 4
MAINTENANCE
33
SECTION 4
MAINTENANCE
WARNING
Before ANY cleaning or servicing of the oven,
perform the following procedure:
1. Switch off the oven and allow it to cool. Do NOT
service the oven while it is warm.
2. Turn off the electric supply circuit breaker(s)
and disconnect the electric supply to the oven.
3. If it is necessary to move a gas oven for
cleaning or servicing, disconnect the gas supply
before moving the oven.
When all cleaning and servicing is complete:
1. If the oven was moved for servicing, return the
oven to its original location.
2. If the restraint cable was disconnected to clean
or service the oven, reconnect it at this time.
3. Reconnect the gas supply.
4. Reconnect the electrical supply.
5. Turn on the full-flow gas safety valve. Test the
gas line connections for leaks using approved
leak test substances or thick soap suds.
6. Turn on the electric supply circuit breaker(s).
7. Perform the normal start-up procedure.
WARNING
Possibility of injury from rotating parts and
electrical shock exist in this oven. Switch off
and lockout/tagout the electric supply BEFORE
beginning to disassemble, clean, or service any
oven. Never disassemble or clean an oven with
the BLOWER switch or any other circuit of the
oven switched on.
NOTICE
NEVER use a water hose or pressurized steam-
cleaning equipment when cleaning this oven. To avoid
saturating the oven insulation, DO NOT use excessive
amounts of water. DO NOT use a caustic oven
cleaner, which can damage the bake chamber
surfaces.
NOTICE
ANY replacement parts that require access to the
interior of the oven may ONLY be replaced by a
Middleby Marshall Authorized Service Agent. It is also
strongly recommended that the 3-Month Maintenance
and 6-Month Maintenance procedures in this section
be performed ONLY by a Middleby Marshall
Authorized Service Agent.
I. MAINTENANCE - DAILY
A. Exterior
Clean the outside of the oven every day with a soft
cloth and mild detergent.
NOTICE
Never use a water hose or pressurized steam cleaning
equipment when cleaning the oven.
B. Cooling Fan
1. ONE COOLING FAN GRILLE AT THE REAR OF
THE OVEN MUST BE CLEANED DAILY - Clean
grille with a stiff nylon type brush.
2. Check the air intake of the cooling fan daily. The
best time to check is right after starting the oven.
IMPORTANT
The cooling fan operates when the blower switch is
turned to “ON” (“I”). It must operate to keep the
electrical control cabinet below 140°F (60°C).
NOTICE
IF FAN BLADE IS NOT ROTATING, BROKEN, OR
FAN ASSEMBLY IS MISSING FROM MAIN BLOWER
MOTOR SHAFT, DO NOT OPERATE OVEN.
REPLACE COOLING FAN BLADE BEFORE
OPERATING OVEN. Serious damage could be done
to the burner blower motor and/or solid-state electrical
components if oven is operated while cooling fan is not
running or vent grille is plugged.
3. Using a stiff nylon brush, clean control
compartment vent grille.
C. Conveyor Belt (Figure 29)
Every day, just after starting the oven, stand at the
unloading end of the conveyor, and use a brush to
remove food particles (crumbs, etc.) clinging to the
conveyor belt, collecting them in the crumb pan.