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SECTION 2
INSTALLATION
Gas Conversion
Where permitted by local and national codes, it is
possible to convert ovens from natural to propane gas,
or from propane to natural gas. Use the appropriate
Middleby Gas Conversion Kit for the specific oven
model.
NOTICE
The terms of the oven's warranty require all startups,
conversions and service work to be performed by a
Middleby Authorized Service Agent.
PS3240 Propane Conversion
Two items have to be changed, to change the oven to
LP:
1. Replace main orifices.
2. Adjust main gas regulator per instructions below.
Disconnect the manifold union closest to the main
burner, and remove the manifold assembly (four
screws). Slide out the manifold assembly (leaving the
ignition and sense wires connected). Replace the main
orifices.
Replace the main orifices on the manifold assemblies
with the LP units, and replace the manifold assembly.
Reconnect the union. Make sure there are no gas
leaks.
Adjusting the Maximum Pressure Setting
1. Disconnect pressure feedback connection (if
applicable).
2. Connect a digital pressure manometer to the gas
manifold (Figure 21) to measure burner pressure
(measuring point must be as near to burner as
possible).
Flexible Gas Hose Installation
3. Make sure that the appliance is in operation and
the Moduplus
current.
4. Place a 5mm wrench on the minimum adjustment
screw and hold in place while making maximum
pressure adjustments.
5. If maximum rate pressure needs adjustment, use
an 8mm wrench to turn adjustment screw for
maximum pressure setting (clockwise to increase
or counter-clockwise to decrease pressure), until
the desired maximum outlet pressure is obtained.
6. Disconnect
Moduplus
®
.
7. Check minimum pressure setting and readjust if
necessary. (See Adjusting Minimum Pressure
Setting for proper adjusting procedure.)
8. If minimum and maximum pressures are set, wire
the Moduplus
®
9. Close pressure tap screw.
22
Gas Burner Assembly
®
coil is energized with maximum
electrical
connection
in circuit.
of
the
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