Weil-McLain GOLD CGS-4E - Manual (Page 32)

Part number 550-110-282/1108
32
GOLD CGs-4E Gas-Fired Water Boiler — Boiler Manual
Operation — sequence
9a
1. Read appropriate Operating instructions in Section 9c .
This information is also located on a label on the inside of
the boiler jacket door panel.
2. Raise room thermostat to call for heat.
3. Circulator energizes. If limit circuit is closed, the inducer
starts. After pressure switch proves proper airflow, control
module initiates a 30-second prepurge.
4. Control module sparks the pilot and opens pilot valve in
main gas valve.
a. If pilot
does not light within 15 seconds, pilot valve is
closed and spark generator is turned off. Control mod-
ule initiates a 15-second postpurge, then starts a new
cycle.
b. If pilot does light and control module senses flame
current, spark generator is turned off and main valve
opens.
5. The CGs-4E timer relay delays high fire for the first 60 seconds
of main flame.
6. During main burner operation :
a. Control module monitors pilot flame current. If signal
is lost , main valve closes, spark generator activates and
sequence returns to step 4 .
b. If power is interrupted , control system shuts off pilot
and main gas valves and restarts at step 1 when power is
restored.
7. In the event the limit control shuts down 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.
8. Lower room thermostat setting to stop call for heat. Ther-
mostat is satisfied — Pilot and main gas valves are closed
— Inducer operates for 15-second postpurge — Circulator
is shut off.
9. Boiler is now in the off cycle .
10. Repeat steps 1 through 6 several times to verify operation.
11. Return the thermostat to normal setting.
12. Set thermostat heat anticipator setting to 0.4 amps, adjusted
for gas valve and control current.