Weil-McLain PFG-7 - Manual (Page 11)

11 Part Number 550-110-031/0605
Control Supplement — Standing Pilot Boilers
For your safety, turn off electrical power supply and turn off external gas supply valve before attempting to work
on the boiler. Failure to comply can cause severe personal injury, death or substantial property damage.
Figure 4
with float-type low water cutoff
1. Mount and wire controls per wiring diagram, page
10, and Figure 4.
a. Attach junction box inside left jacket panel with
#8-32 x ½" machine screws and green ground
nuts provided.
b. Install transformer with plug-in relay receptacle
and relay. In Canada, use chain and hook strain
relief.
c. Operating and limit circuit wiring must be 18
gauge or heavier (as supplied with the boiler).
2. Bring supply wiring to boiler. Must be 14 gauge or
heavier.
Checkout procedure
1. Follow all instructions in the boiler manual, including the Checkout procedure, before proceeding.
2. See page 12 for “Lighting instructions”. Raise room thermostat to call for heat.
3. Gas valve will open and main burners will ignite.
4. Lower thermostat setting. Main burner flames will go out.
5. Repeat steps 1 through 3 several times to verify operation.
6. Return thermostat to normal setting.
Anticipator settings
Water — 0.40 amps, single zone systems only. For multiple zones using zone
valves or circulators, refer to component manufacturer’s instructions for
application, wiring and thermostat heat anticipator setting.
Steam — 0.20 amps.