Filter
Top Products
10 Gas Valve Cross Reference
Cycle Pilot System
The thermostat calls for heat and simultaneously energizes pilot
solenoid and pilot relight control. Pilot valve opens and relight
begins sparking. Gas ow activates the pressure switch. Sparks
ignite pilot gas. Once the ame is detected, the sparks stop.
After sufcient heat is sensed by the Mercury Flame Sensor, the
main valve is energized and the system is in operating mode.
(Fig. 1)
The schematic for “ALL GASES,” Figure 2, includes a safety
timer which acts to close the main gas valve, turns off the pilot
redundant coil and locks out the system should a ame not be
detected within a xed period of time.
54321
1
62
34
5
1
62
345
PILOT
REDUNDANT
COIL
MAIN COIL
3098 SENSOR
HOT
COLD
PRESSURE
SWITCH
63254
WIRING
HARNESS
2
3
4
TO ELECTRODE
T2 T1
THRU MOUNTING
HOLES
THERMOSTAT
LIMIT
24 VAC
LINE
40VA
TRANSFORMER
NATURAL GAS
Figure 1
5059
CYCLE PILOT HARNESSES
HARNESS
LENGTH
TYPE NO.
36”
36”
F115-0059
F115-0064
ALL GASES
Figure 2
PILOT
REDUNDANT
COIL
MAIN COIL
3098 SENSOR
HOT
COLD
PRESSURE
SWITCH
WIRING
HARNESS
2
3
4
TO ELECTRODE
T2 T1
THRU MOUNTING
HOLES
THERMOSTAT
LIMIT
24 VAC
LINE
5059
54231
T1T2
63254
WARP SWITCH HEATER
WARP
SWITCH
SAFETY
TIMER
5022
BLUE
RED
TAN
YEL
ORG
►System Applications