9
PRESSURE READING
TEST NIPPLE
IL1191
SET-SCREW
GAS PRESSURE
ADJUSTMENT SCREW
IS UNDER CAP
OVEN MANIFOLD PRESSURE REGULATION
Each oven has been adjusted at the factory to operate with
the gas speci
fi
ed on the nameplate.
Each oven is supplied with a regulator to maintain the proper
gas pressure. The regulator is essential to the proper
operation of the oven and should not be removed or replaced
by another model unless approved by Star Manufacturing.
A pressure reading can be taken at the test nipple provided.
You must back the set-screw one turn for this test, be certain
to re-tighten when you are done. Failure to reset the set-
screw to its original position will create a gas leak once the
unit is back in operation. The reading should be taken while
the oven is heating up & at high
fi
re. The regulator is located
on the bottom of the gas combination valve, just inside the
control box. Adjust gas manifold regulator gas pressure by
removing the cap and adjusting the regulator adjustment
screw to match the pressure listed on the name plate (3.5"
Nat, 4.8" Propane). Clockwise to increase, counterclockwise
to decrease.
Oven Manifold Regulator, w/Set Screw
PRESSURE TESTING GAS SUPPLY LINE
During pressure testing note the following:
1. The oven and its individual manual shut-off valve must be disconnected from the gas supply piping
system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.45 kPa).
Turn OFF
main gas shut-off valve or main gas supply line.
2. The oven must be isolated from the gas supply piping system by closing its individual manual shut-
off valve during any pressure testing of the gas supply piping system at test pressures equal to or
less than 1/2 psig (3.45 kPa).
3. If incoming pressure is over 14" water column, a separate regulator for the oven must be installed
before the gas supply to the oven.
To prevent damage to the control valve regulator during the initial turn-on of
gas, it is very important to open the manual shut-off valve very slowly. After the
initial gas turn-on, the manual shut-off valve must remain open except during
pressure testing as outlined in the above steps or when necessary during service
maintenance.
NOTE: The supplied regulator is evaluated for a maximum gas supply pressure of
14" water column (34.5 mBar). The recommended maximum gas supply pressure
is 12" water column (29.9 mBar).
Installation must conform with local codes or, in the absence of local codes, with the National
Fuel Gas Code, NFPA54/ANSI Z223.1 - Latest Edition, the Natural Gas Installation Code
CAN/CGA-B149.1 or the Propane Installation Code CAN/CGA-B149.2 as applicable.
UTILITY INSTALLATION
CAUTION
WARNING
Summary of Contents for Ultra-max UM3240
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