Operation - Weil-McLain Gold CGi 2 Series Manual

CGi
GOLD GAS-FIRED WATER BOILER — SERIES 2 —
9a
Operation — sequence
Read Operating instructions
1.
information is also located on a label on the inside
of the boiler jacket door panel.
Raise
2.
Circulator energizes.
3.
inducer starts. After pressure switch proves proper
airflow, control module initiates 10-second pre-
purge.
Control module sparks
4.
valve in main gas valve.
a. If pilot
is closed and spark generator is turned off. Control
module initiates a 15-second postpurge, then starts
a new cycle.
b. If pilot
current, spark generator is turned off and main valve
opens.
During main burner operation:
5.
a. Control module monitors pilot flame current.
If signal is lost
Figure 30 Control module sequence of operation — status light indications
Part Number 550-110-710/1211
on page 40. This
room thermostat to call for heat.
If limit circuit is closed, the
the pilot and opens pilot
does not
light within 15 seconds, pilot valve
does
light and control module senses flame
, main valve closes, spark gen-
Boiler Manual
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.
7. 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.
off cycle
8. Boiler is now in the
9. Repeat steps 1 through

operation.

10. Return the thermostat to normal setting.
11. Set thermostat heat anticipator setting as instructed
Figure 32
in , page 39.
4
.
, control system shuts
.
6 several times to verify
37