Lennox GWB9 User Manual

40
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Refer to the appropriate diagrams in Section VII, “Near Boiler
Piping,” for more information.
Close all zone service valves on the supply and return pip- 1.
ing. Open the feed valve and ll boiler with water. Make
sure air vent is open. Hold relief valve open until water
runs air free for ve seconds to rapidly bleed air from
boiler, then let the relief valve snap shut.
Open the zone service valve on the supply pipe for the rst
2.
zone. Open the purge valve on the rst zone. Feed water
will ll the zone, pushing air out the purge valve. Close the
purge valve when the water runs air free. Close the zone
service valve.
Repeat step 2 for all remaining zones. 3.
Open all service valves. Any air remaining trapped in the 4.
return lines between the service valves and the boiler will
be pushed towards the air vent when the boiler is placed in
operation.
Inspect piping system. Repair any leaks immediately. 5.
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
Refer to the appropriate diagrams in Section VII, “Near Boiler
Piping,” for more information.
Close all zone service valves on the supply and return 1.
piping and close the expansion tank service valve. Drain
expansion tank. Open the feed valve and ll boiler with
water. Hold relief valve open until water runs air free for
ve seconds to rapidly bleed air from boiler, then let the
relief valve snap shut.
Open the zone service valve on the supply pipe for the rst 2.
zone. Open the purge valve on the rst zone. Feed water
will ll the zone, pushing air out the purge valve. Close the
purge valve when the water runs air free. Close the zone
service valve.
Repeat step 2 for all remaining zones. 3.
Open the expansion tank service valve and the tank vent. 4.
Fill the tank to the proper level and close the tank vent.
Remove the handle from the expansion tank service valve
so the homeowner doesn’t accidentally close it.
Open all service valves. Any air remaining trapped in the 5.
return lines between the service valves and the boiler will
be pushed towards the expansion tank when the boiler is
placed in operation.
Inspect piping system. Repair any leaks immediately. 6.
Note:
DO NOT use stop leak compounds. Leaks in threaded con-
nections in the aluminum boiler sections must be repaired
immediately. Aluminum threads will not seal themselves.

Lennox GWB9 Specifications

General

Brand	Lennox
Model	GWB9
Category	Boiler
Language	English