Natco ANSI Z 21.10.3, Service Manual

Page: 33 / 40

PAGE: 33
9. TURN THE LINE VOLTAGE BACK ON, TO THE SUPER-E.
GAS VALVE ADJUSTMENT
I. LET THE UNIT START TO CYCLE AND LISTED CAREFULLY TO THE IGNITION. IF THE IGNITION WAS QUIET, THE
VALVE WILL NEED NO ADJUSTMENT. IF IT WAS A LOUD IGNITION OR THERE WAS NOT IGNITION AT ALL, FOLLOW
THESE STEPS:
A. IF THERE WAS NO IGNITION:
1. MAKE SURE THE GAS VALVE IS IN THE "ON" POSITION; GAS IS ON TO THE UNIT; AND THE GAS
VALVE WIRING HARNESS IS PLUGGED INTO THE GAS VALVE AND INTO THE CONTROL BOARD
2. TURN THE ADJUSTMENT SCREW UNDER THE BRASS CAP YOU REMOVED IN STEP #8 ABOVE.
TURN ONE FULL TURN CLOCKWISE WITH A SMALL FLATHEAD SCREWDRIVER. THIS WILL
INCREASE THE GAS VOLUME IN THE COMBUSTION PROCESS.
A. IF THE UNIT STILL DOES NOT LIGHT OFF, TURN THE ADJUSTMENT
SCREW TWO FULL TURNS COUNTERCLOCKWISE
8. REMOVE THE SMALL ROUND BRASS PLUG FROM THE GAS VALVE BY TURNING IT COUNTER-CLOCKWISE WITH A
PAIR OF SNAP RING OR NEEDLE NOSE PLIERS.
5. RE-CONNECT THE SUPPLY GAS PIPING TO THE VALVE.
6. TURN ON THE GAS TO THE SUPER-E.
7. TURN THE BLUE KNOB ON THE GAS VALVE TO THE "ON" POSITION.