Operation - Weil-McLain GOLD CGS 550-110-260/0107 Manual

GOLD CGs Gas-Fired Water Boiler — Boiler Manual
9a
Operation — sequence
Read appropriate Operating instructions
1.
Section
label on the inside of the boiler jacket door panel.
Raise
.
Circulator energizes.
3.
inducer starts. After pressure switch proves proper
airflow, 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
flame current, spark generator is turned off
and main valve opens.
5. During
a. Control module monitors pilot flame current.
If signal is lost
Figure 18 Control module sequence of operation — status light indications
Part number 550-110-260/0107
9c
. This information is also located on a
room thermostat to call for heat.
If limit circuit is closed, the
the pilot and opens pilot
does not light within 15 seconds, pilot
does
light and control module senses
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
1
step when power is restored.
limit control shuts down the
6. In the event the
boiler
— The control module closes the pilot and
main gas valves, but keeps the inducer operating for
15-second postpurge.
— The circulator continues to operate.
. Lower room thermostat setting to stop call for
heat. Thermostat is satisfied — Pilot and main gas
valves are closed — Inducer operates for 15-second
postpurge — Circulator is shut off.
8. Boiler is now in the
9. Repeat steps 1 through

operation.

Return
10. the thermostat to normal setting.
11. Set thermostat heat anticipator setting to 0.4 amps,
adjusted for gas valve and control current.
, control system shuts
off cycle
.
6 several times to verify
31
4
.