Honeywell C7076D Product Data page 10

C7076A,D ADJUSTABLE SENSITIVITY ULTRAVIOLET FLAME DETECTORS
WATER TIGHT
CONDUIT
FITTING
Fig. 7. Connecting the watertight flexible conduit.
8
6
4
2
0
DIFFERENTIAL PRESSURE (
Fig. 8. C7076A purge air requirements.
95-8269—1
TERMINAL
BLOCK
FLAME
DETECTOR
WIRES
LUCK NUT
FLEXIBLE
CONDUIT
M20752
10" OF ASPIRATOR PIPE
(1" PIPE)
Pchamber
Pinlet
1 2
P = Pinlet – Pchamber)(PSI)
M20753
60
50
40
30
20
10
0
POSITIVE CONBUSTION CHAMBER PRESSURE – PSIG
Fig. 9. Minimum inlet pressure or airflow.
1
AIR SUPPLY
PRESSURE
1 EQUALS OR EXCEEDS THE PRESSURE REQUIRED TO
SEAL OFF THE SIGHT PIPE FROM A POSITIVE
PRESSURE COMBUSTION CHAMBER.
2
OPEN ONLY WHEN SERVICING THE DETECTOR.
3
ADJUST TO PROVIDE ENOUGH AIR TO COOL THE
ASPIRATOR AND MAINTAIN A CLEAR SIGHT PIPE.
REMOVE HANDLE AFTER ADJUSTING.
Fig. 10. Supplying a constant airflow for purge.
10
1 2 3
2
MANUAL SHUTOFF
VALVE (BALL VALVE)
TO ASPIRATOR
NEEDLE
3
VALVE
4 5
M20754
M20755