I.C.E. GIDM-325 - Manual (Page 21)

BURNER
MOTOR
LOW & HIGH BUTTERFLY SETTING
SHORT CRANK ARM
GIDM GRAVITY VENTED F-400-33 BURNER
( DECREASE THE DISTANCE BETWEEN DRIVE ROD AND CENTER PIN).
3. TO INCREASE COMBUSTION AIR MOVE DRIVE ROD TOWARDS CENTER PIN
2. TO INCREASE EXHAUST MOVE DRIVE ROD TOWARD DAMPER PIN
1. INSTALL A MANOMETER ON SUCTION AT TEST PORT IN POP-UP DOOR.
(DECREASE THE DISTANCE BETWEEN DRIVE ROD AND CENTER PIN.)
A) INSURE THERE IS A NEGATIVE PRESSURE AT THAT POINT ON LOW
FIRE THROUGH TO HIGH FIRE. -.50 TO - .75 W.C. LOW FIRE AND
YOU MAY HAVE TO SPEED UP EXHAUST AND OR BURNER DAMPER TO
4. TO INSURE A NEGATIVE PRESSURE THROUGHOUT FULL MODULATION RANGE,
MATCH GAS FLOW TO THE BURNER.
MOVE DRIVE ROD CLOSER TO THE DRIVE PIN ON THE BUTTERFLY VALVE.
( THIS WILL REDUCE THE MOVEMENT OF THE BURNER DAMPER)
VALVE.
5. ADJUST LOW AND HIGH FIRE ON THE STOP SCREWS ON THE BUTTERFLY
NOTE:
THE MOTOR IS ALLOWED TO OVER RUN WITH THE SPRINGS LINKAGE SET THE
TRAVEL ON THE PENN JOHNSON MOTOR TO INSURE IT DOES NOT GO TO FAR
OR DAMAGE TO THE MOTOR COULD OCCUR.
OPEN AT SET SCREW.
1. THE ABOVE SETTING IS IN LOW FIRE POSITION.
3. TO DECREASE PRIMARY AIR ON HIGH FIRE MOVE
BUTTERFLY CRANK ARM DOWN CLOSER TO HORIZONTAL
2. THE PRIMARY AIR ON BURNER TO BE ONLY 1/2-1 TURN
POSITION.
BUTTERFLY VALVE ARM
BALL JOINT ABOUT 3/4
DOWN FROM PIN
PRIMARY AIR DAMPER
LONG CRANK ARM
ON BURNER
LINKAGE OPERATION (POWER VENT)
-.01 TO -.10 ON HIGH FIRE.
GIDM - LINKAGE SET-UP WITH POWER VENT
BUTTERFLY DAMPER PIN
LOW FIRE
SET SCREW
BUTTERFLY
DAMPER
ARM
BURNER
DAMPER
HIGH FIRE
TRAVEL
HIGH FIRE
SET SCREW
POP UP DOOR
PRESSURE
TEST PORT
DAMPER CENTER PIN
HIGH FIRE
TRAVEL
EXHAUST
BLOWER
JOB NO.
DRW. NO. SCALE
REV DATE CHK. BY
ISSUED BY DRAWN BY
TITLE
Rev By Revision Description Date
GIDM GRAVITY VENTED LINKAGE OPERATION
AND POWER VENT LINKAGE SET-UP
GIDM
SERIES
JV
JULY 1/98
1:1 FIG. IV
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