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Gas Valve Cross Reference 9
Standing Pilot
Gas ow to the pilot burner is controlled by a safety valve which
is manually operated and held in by current generated from a
thermocouple placed in the pilot ame. When the thermostat
calls for heat the main valve is energized.
Proven Pilot
The thermostat calls for heat and simultaneously energizes the
pilot valve and the Proven Pilot control. Sparking from the ignition
electrode to the pilot burner ignites the gas at the pilot burner.
Flame is sensed by the ame detection circuit which energizes
the main valve. Main burner gas is ignited and sparking ceases
once a pilot ame is detected.
►System Applications
Typical Wiring for Proven/Intermittent Pilot System
Wiring for 36C03 (24 VAC) with E.C.O.
THERMOSTAT
LIMIT
HOT
LINE VOLTAGE
120 VAC
NEUTRAL
COMMON (“C”)WR
25 VAC
H.V. LEAD
IGNITION
ELECTRODE
(PILOT)
SENSE
ELECTRODE
T
H
P
V
M
V
C
P
M
M
V
P
V
T
R
G
N
D
F
P
LINE VOLTAGE
LOW VOLTAGE
OFF
PILOT
ON
TR
TH
TRTH
PILOT
ADJ.
Thermostat
TH, TH-TR to Thermostat
TH-TR, TR to Transformer
Line
24 VAC
Hot
Transformer
Electrical Cut Out (E.C.O.) Switch or
Supplementary Limit in appliance
Figure 5. Wiring for 36C03 (24 VAC)
R
W
NOTE: If appliance does not
have E.C.O. Switch
or supplementary limit,
jumper E.C.O. terminals
Jumper
Power Unit
ECO Terminals (2)