Start Up - Dunkirk 90-50 Installation, Operation & Maintenance Manual

filling boiler With Water and purging air for systems
With diaphragm Type expansion Tanks
Refer to the appropriate diagrams in Section VII, "Near Boiler Pip-
ing, " for more information.
Close all zone service valves on the supply and return piping.
1.
Open the feed valve and fill boiler with water. Make sure air
vent is open. Hold relief valve open until water runs air free for
five 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 first
2.
zone. Open the purge valve on the first zone. Feed water will fill
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 return
4.
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.
purging air for systems With Conventional Closed Type
expansion Tanks:
Refer to the appropriate diagrams in Section VII, "Near Boiler
Piping, " for more information.
Close all zone service valves on the supply and return piping
1.
and close the expansion tank service valve. Drain expansion
tank. Open the feed valve and fill boiler with water. Hold relief
valve open until water runs air free for five 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 first
2.
zone. Open the purge valve on the first zone. Feed water will fill
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. Fill
4.
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 return
5.
lines between the service valves and the boiler will be pushed
towards the expansion tank when the boiler is placed in opera-
tion.
Inspect piping system. Repair any leaks immediately.
6.
DO NOT use stop leak compounds. Leaks
in threaded connections in the aluminum
boiler sections must be repaired immediately.
Aluminum threads will not seal themselves.
NOTICE

sTarT up

placing boiler in operation
If you do not follow these instructions
!
exactly, a fire or explosion may result
causing property damage, personal injury or
loss of life.
A. This appliance is equipped with an ignition device which
automatically lights the pilot. Do not try to light the pilot
by hand.
B. BEFORE OPERATING smell all around the appliance area
for gas. Be sure to smell next to the floor because some gas
is heavier than air and will settle on the floor.
What To Do If You Smell Gas
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in
your building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire depart-
ment.
C. Use only your hand to move the system control switch.
Never use tools. If the switch will not move by hand, don't
try to repair it, call a qualified service technician. Force or
attempted repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect
the appliance and to replace any part of the control system
and any gas control which has been under water.
34
WARNING