Weil-McLain GOLD CGi-4E Manual page 38

CGi-4E Gas-Fired Water Boiler — Boiler Manual
GOLD
9a
Operation — sequence
Read Operating instructions
1.
also located on a label on the inside of the boiler jacket door
panel.
2. Raise room thermostat to call for heat.
Circulator energizes.
3. If limit circuit is closed, the inducer
starts. After pressure switch proves proper airflow, control
module initiates 30-second prepurge.
4. Control module sparks
main gas valve.
does not
a. If pilot light within 15 seconds, 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 does light and control module senses flame current,
spark generator is turned off and main valve opens.
5. The CGi-4E timer relay delays high fire for the first 60 seconds
of main flame.
During main burner operation:
6.
a. Control module monitors pilot flame current.
is lost
, main valve closes, spark generator activates and
sequence returns to step
38
on page 41. This information is
the pilot and opens pilot valve in
If signal
4
.
If power is interrupted
b.
and main gas valves and restarts at step
restored.
7. In the event the limit control shuts down the boiler
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
Repeat 1
10. steps through
Return
11. the thermostat to normal setting.
12. Set thermostat heat anticipator setting as instructed in
31
, page 40.
shuts off
, control system
1 when power is
.
6
several times to verify operation.
Part Number 550-110-711/1108
pilot
— The
Figure