Middleby Marshall PS500 installation manual Maintenance Daily

SECTION4-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 the oven for cleaning or servicing, disconnect the gas supply connection before moving the oven.

When all cleaning and servicing is complete:			the oven, reconnect it at this time.
1.	If the oven was moved for servicing, return the oven to its	5.	For gas ovens, turn on the full-flow gas safety valve. Test
	original location.		the gas line connections for leaks using approved leak
2.	For gas ovens, reconnect the gas supply.		test substances or thick soap suds.
3.	Reconnect the electrical supply.	6.	Turn on the electric supply circuit breaker(s).
4.	If the restraint cable was disconnected to clean or service	7.	Perform the normal startup procedure.

WARNING

Possibility of injury from moving parts and electrical shock exists 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.

ENGLISH

CAUTION

NEVER use a water hose or pressurized steam-cleaning equipment when cleaning this oven. DO NOT use excessive amounts of water, to avoid saturating the oven insulation. DO NOT use a caustic oven cleaner, which can damage the aluminized bake chamber surfaces.

NOTE

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.Check that the oven is cool and the power is disconnected, as described in the warning at the beginning of this Section.

B.Clean the outside of the oven with a soft cloth and mild detergent.

C.Clean the front cooling fans, as follows:

•Snap off the protective grille, and wipe it clean with a cloth. See Figure 4-1.

•Remove the foam filter and inspect it. If it is dusty, shake it briskly. If dirt or grease is present on the filter, wash it in warm, soapy water. Rinse the filter, squeeze it to remove as much of the water as possible, and then set it aside to dry thoroughly before reinstallation.

•Once the filter is dry, reinstall the filter and grille.

D.Clean the motor shroud and rear grills using a stiff nylon brush. Refer to Figure 4-2 for the locations of the grills.

E.Check that ALL cooling fans are operating properly.

CAUTION

If a cooling fan is not operating correctly, it must be replaced IMMEDIATELY. Operating the oven without adequate cooling can damage the oven's internal components.

F.Clean the conveyor belts with a stiff nylon brush. This is more easily accomplished by allowing the conveyor to run while you stand at the exit end of the conveyor. Then, brush the crumbs off the conveyor as it moves.

G.Remove and clean the crumb trays. When reinstalling the trays, refer to Figure 2-12 (in Section 2, Installation).

Figure 4-1 - Front Cooling Fans

Foam filter

Protective grill

Figure 4-2 - Rear Grills and Motor Shroud Grill

Grill on top of

conveyor motor

shroud

Grills on top			Grills on end
and bottom	Grills on inside
			shrouds (4)
of rear	face of rear	Grills on rear of
shrouds (4)	shrouds (2 - gas	rear shrouds (2)
17	ovens only)