I.C.E. GIDM-325 - Manual (Page 22)

LINKAGE OPERATION (GRAVITY VENT)
BURNER
DAMPER
BUTTERFLY
DAMPER
ARM
LOW FIRE
SET SCREW HIGH FIRE
SET SCREW
BUTTERFLY DAMPER PIN
HIGH FIRE
TRAVEL
POP UP DOOR
PRESSURE
TEST PORT
GIDM - LINKAGE SET-UP
( 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 POSITIVE AT TEST PORT IN POP-UP DOOR.
(DECREASE THE DISTANCE BETWEEN DRIVE ROD AND CENTER PIN.)
A) INSURE THERE IS A PRESSURE AT THAT POINT ON LOW
FIRE THROUGH TO HIGH FIRE. MAXIMUM 1.50" W.C.
YOU MAY HAVE TO SPEED UP EXHAUST AND OR BURNER DAMPER TO
4. TO INSURE A POSITIVE 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.
ADJUSTMENTS ARE MADE WITH THE SYSTEM IN OPERATION.
THE PROPORTIONAL BAND ADJUSTMENT, LOCATED ON THE TERMINAL
TURN THE PROPORTIONAL BAND ADJUSTMENT UNTIL THE SYSTEM
STABILIZES AND THE MOTOR ACTUATOR NO LONGER OSCILLATES.
PROPORTIONAL BAND
SET POINT
THE R81'S TERMINAL BOARD AND HAS A CALIBRATED DIAL
THE SET POINT FOR THE REMOTE SENSOR IS LOCATED ON
ADJUSTMENT
THAT IS ADJUSTABLE BETWEEN 40 AND 90°F (5 AND 30°C).
BOARD, IS ADJUSTABLE BETWEEN 2 AND 30°F (1.1 TO 16.7FC). FIELD
WITH DISCHARGE AIR SENSOR AND SELECTION ON MOTOR
ELECTRONIC BOARD.
STANDARD PENN JOHNSON MODULATION SYSTEM
NOTE:
8 10
X
XR
XD
T1
I N C T R
A
V
E
L
SET POINT
P
B
I N
C
24 V.A.C.
R B
A91, T91
THERMISTOR
SENSOR
M100 WITH R81Q
2
S
S
1
2
T
JUMPER
POWER SUPPLY
FIG. 4 - TYPICAL WIRING HOOKUP FOR THE
R81QAA INSTALLED IN AN M100 SERIES
MOTOR ACTUATOR.
JOB NO.
DRW. NO. SCALE
REV DATE CHK. BY
ISSUED BY DRAWN BY
TITLE
Rev By Revision Description Date
GIDM GRAVITY VENTED LINKAGE OPERATION
GIDM
SERIES
JV
JULY 1/98
1:1 FIG. V
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