Middleby Marshall PS200 series - Manual (Page 136)

135
Combination gas
control valve
Aluminum
pilot tubing
Pilot
orifice
Main
orifice
holder
Solenoid valve
(PS360WB70 only)
Low flame bypass
(PS360WB70 only)
WARNING
This conversion kit is to be installed by a Middleby Marshall Authorized Service Organization in accordance with
the manufacturer’s instructions and all codes and requirements of the authority having jurisdiction. Failure to
follow instructions could result in serious injury or property damage. The authorized service organization
performing this work assumes responsibility for this conversion.
This kit consists of the following parts:
Qty. Units p/n Description
1 ea. 36862 Instructions for Conversion of Propane Operation to Natural Gas Operation, PS360EWB and
PS360WB70
1 ea. 31818 Orifice, Pilot Assembly - Natural Gas, 0.032” (0.81mm)
1 ea. 31821 Orifice, Main - Natural Gas, 0.234” (5.94mm)
1 ea. 22174-0006 Orifice, Low Flame - Nat. Gas, 0.065” (1.65mm, #53 drill) - used for converting PS360WB70 only
1 ea. 22500-0064 Label, NAT, Green
1 ea. 22500-0123 Label, Conversion - Gas
IMPORTANT
When converting any oven that is installed at an altitude above 5000 ft. (1524m), consult Middleby before installing
this Kit.
1. PREPARATION
1.1 Turn off the electric power supply to the oven.
1.2 Turn off the gas supply at the service valve behind the oven.
WARNING
Before performing any service or conversion work, the electrical power supply AND the gas supply MUST be
turned off.
1.3 Open the machinery compartment access door.
2. PILOT ORIFICE REPLACEMENT
2.1 Unscrew the brass fittings at both ends of the aluminum pilot tubing that connects the pilot orifice to the combination gas control
valve. This allows the tubing to be removed. See Figure 1.
Oven Gas Conversion Kit p/n 36863
PS360EWB and PS360WB70
Propane to Natural Gas Installation Instructions
Marshall Marshall Marshall Marshall Marshall
Middleby Middleby Middleby Middleby Middleby
® ® ® ® ®
Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • (847)741-3300 • FAX (847)741-4406
Figure 1
Conversion component locations
p/n 36862 P. Jan. 98 Rev B Page 1 of 4
SECTION 3 - SERVICING COMPONENTS
Appendix - Instructions for Service Kit 36863 - Gas Conversion Kit for
PS360EWB/WB70 with Midco Burner, Propane to Natural Gas, 1/98