Operation - Weil-McLain GOLD CGS 550-110-260/0508 User Manual

GOLD CGs Gas-Fired Water Boiler — Boiler Manual
9a
Operation — sequence
1.
Read appropriate Operating instructions
Section
label on the inside of the boiler jacket door panel.
2.
Raise
3.
Circulator energizes.
inducer starts. After pressure switch proves proper
airfl ow, control module initiates a 30-second pre-
purge.
4.
Control module sparks
valve in main gas valve.
a. If pilot
valve is closed and spark generator is turned
off. Control module initiates a 15-second
postpurge, then starts a new cycle.
b. If pilot
fl ame current, spark generator is turned off
and main valve opens.
5. During
a. Control module monitors pilot fl ame current.
If signal is lost
Figure 18 Control module sequence of operation — status light indications
Part number 550-110-260/0508
. This information is also located on a
9c
room thermostat to call for heat.
If limit circuit is closed, the
the pilot and opens pilot
light within 15 seconds, pilot
does not
light and control module senses
does
:
main burner operation
, main valve closes, spark gen-
in erator activates and sequence returns to step
b.
If power is interrupted
off pilot and main gas valves and restarts at
step when power is restored.
1
6. In the event the
limit control shuts down the
— The control module closes the pilot and
boiler
main gas valves, but keeps the inducer operating for
15-second postpurge.
— The circulator continues to operate.
7. room thermostat setting to stop call for
Lower
heat. Thermostat is satisfi ed — Pilot and main gas
valves are closed — Inducer operates for 15-second
postpurge — Circulator is shut off.
8. Boiler is now in the
9. steps through
Repeat 1

operation.

10. the thermostat to normal setting.
Return
11. Set thermostat heat anticipator setting to 0.4 amps,
adjusted for gas valve and control current.
, control system
shuts
.
off cycle
several times to verify
6
.
4
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