Natco ANSI Z 21.10.3 Service Manual page 36

Super high efficiency gas fired water heating combination appliance
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12.
LET THE SUPER-E CYCLE. AFTER THE SUPER-E STARTS, LET IT RUN FOR 30 SECONDS, THEN ADJUST THE
GAS VALVE BY USING THE GAS VALVE ADJUSTMENT SCREW, SO THAT MANOMETER #2 READS EXACTLY THE
SAME AS MANOMETER #1.
EXAMPLE:
IF MANOMETER #1 READS -.35" AND MANOMETER #2 READS .1"; YOU WOULD ADJUST THE GAS
VALVE BY USING THE GAS VALVE ADJUSTMENT SCREW, SO THAT THE MANOMETER #2 ALSO
READS -.35".
13.
IF THERE WAS NO IGNITION:
A.
MAKE SURE THE GAS VALVE 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.
B.
TURN THE ADJUSTMENT SCREW UNDER THE BRASS CAP YOU REMOVED IN STEP #8. TURN ONE FULL
TURN CLOCKWISE WITH SMALL FLATHEAD SCREWDRIVER. IF THE UNIT STILL DOES NOT LIGHT OFF,
TURN THE ADJUSTMENT SCREW TWO FULL TURNS COUNTER-CLOCKWISE.
14.
SHUT THE VOYAGER DOWN, THEN START IT UP AGAIN; LET IT RE-LIGHT. IF THE IGNITION WAS GOOD, THE
VALVE NEEDS NO FURTHER ADJUSTMENT. IF THE IGNITION WAS POOR, SHUT DOWN THE UNIT AND LET IT
CYCLE AGAIN. TURN THE GAS VALVE ADJUSTMENT SCREW SO THAT MANOMETER #2 READS .10" MORE THAT
MANOMETER # 1. EXAMPLE: MANOMETER #1 READS -.35"; ADJUST MANOMETER #2 SO THAT IT READS -.25". IF
THIS DOES NOT STOP THE POOR IGNITION, ADJUST THE GAS VALVE ADJUSTMENT SCREW ANOTHER .10".
EXAMPLE: IF MANOMETER #1 READS -.35", MANOMETER #2 SHOULD BE ADJUSTED TO NOW READ -.15".
15.
PUT THE GAS VALVE ADJUSTMENT SCREW COVER BACK IN PLACE AND TIGHTEN.
16.
REMOVE ALL THE CLEAR VINYL HOSES FROM THE GAS VALVE.
17.
REMOVE THE BARB IN THE OUTLET PRESSURE TAP, REPLACE IT WITH THE ORIGINAL PLUG, AND TIGHTEN.
18.
RE-CONNECT THE CLEAR VINYL HOSE TO THE GAS VALVE, AND TO THE TRAP ADAPTER.
20.
PUT THE SUPER-E CABINET DOOR BACK IN PLACE.
PAGE: 36

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