Weil-McLain Gold CGs-4E Manual page 32

CGs-4E Gas-Fired Water Boiler — Boiler Manual
GOLD
9a
Operation — sequence
Read appropriate Operating instructions
1.
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.
Circulator energizes.
3. 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
main gas valve.
does not
a. If pilot 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.
main burner operation
6. During
a. Control module monitors pilot flame current.
is lost
, main valve closes, spark generator activates and
32
in Section
the pilot and opens pilot valve in
:
If signal
9c
. sequence returns to step
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.
Lower
8. 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
Repeat 1
10. steps through
11. Return the thermostat to normal setting.
12. Set thermostat heat anticipator setting to 0.4 amps, adjusted
for gas valve and control current.
4
.
shuts off
, control system
1
when power is
off cycle
.
6
several times to verify operation.
Part number 550-110-282/1108
pilot
— The