Service manual

Service Manual for Flexible Batch Broiler Units
26
INCOMING GAS PRESSURE
WARNING
THE BROILER IS DESIGNED TO
OPERATE WITH INCOMING NATURAL
GAS PRESSURES BETWEEN 7" AND
12" WATER COLUMN (WC). SERVICE
PRESSURES ABOVE 12" WC AND
LESS THAN 2 PSI, WILL REQUIRE
DUKE’S HIGH SUPPLY NATURAL GAS
KIT (P/N 175689). THE KIT INCLUDES
COMPONENTS TO ADD AN EXTERNAL
REGULATOR TO THE BROILER. THE
REGULATOR SHOULD BE ADJUSTED
AFTER INSTALLATION TO 7" WC PER
THE ENCLOSED INSTRUCTIONS.
COMBO GAS VALVE
The two Combo Gas Valves are located next to each
other and are accessible by removing the Lower
Control Side Service Panel. One gas valve is for the
Lower J Burner and the other gas valve is for the Upper
Infrared Burners. The gas pressure has been preset at
the factory for the type of gas specied on the rating
plate; however, it is sometimes necessary to adjust the
gas pressure after the unit has been installed. Always
check the incoming gas pressure at the tap provided
on the inlet pipe before making any valve pressure
adjustments. Valve adjustments must be made when
both valves are fully open with all burners operating.
ADJUSTMENTS
Upper
Combo Gas Valve
Lower
Combo Gas Valve
Burner
Gas Lines
Input
Gas Lines
Combo Gas Valve
1. Turn the incoming gas supply to the broiler off.
2. Remove the Upper Lift Off Panel. Refer to the
COVERS and PANELS section of the manual.
NOTE: Do not disconnect any wiring.
3. Remove the pressure tap plug and replace with
the tting for a gas pressure meter, Slack Tube or
Manometer.
4. Attach the meter.
5. Turn gas supply on.
NOTE: The pressure regulator is an integral part of
the Combo Gas Valve.
6. Locate the adjustment screw by removing the
slotted aluminum cap.
7. Adjust pressure reading to 3.75" WC for natural
gas or 8.0" WC for Propane Gas.
8. Turn gas supply off.
9. Disconnect meter.
10. Remove tting and reinstall pressure tap plug.
11. Turn gas supply back on.
12. Check for any gas leaks.
13. Check broiler operation.