28
debris rinsed away by this method will exit
through the condensate drain. Be wary of
drain lines getting clogged and causing wa-
ter to back up in the bottom of the casting.
CAUTION
!
Use a flexible handle nylon brush to loosen sediment and
•
aluminum oxide on all accessible heating surfaces of the
boiler. Be sure not to get brush stuck in heat exchanger!
After brushing and rinsing, remove any remaining loos
-
•
ened sediment using a shop vacuum with a snorkel at
-
tachment.
Inspect burner for any foreign matter in the flame ports or
•
inside the burner. Any foreign matter should be removed
by blowing with compressed air or vacuuming. If the
burner cannot be cleaned, it must be replaced.
Reinstall burner and gaskets and position blower adapter
•
assembly over studs. Install five nuts but do not tighten.
Reinstall igniter and igniter gasket and fasten with two
screws. Tighten five nuts holding blower adapter assem
-
bly.
Connect gas line to gas valve, pressure switch hose to
•
gas valve and air inlet assembly, igniter wires, and gas
valve wires.
Visually inspect the condensate trap. Any foreign
4.
material visible in the condensate lines needs to be
cleaned out as described below:
Inspect for sediment or blockage.
•
Flush out with water or vacuum.
•
Follow the instructions in Section VII, “Filling The Conden
-
•
sate Trap With Water.”
Inspect the flue connector as follows:
5.
Loosen the clamp on the vent tee side of the 2” flexible
•
coupling that connects the vent tee to the exhaust port.
Inspect interior of vent tee. Any buildup of sediment on
•
the inside surface must be cleaned.
Reconnect 2” flexible coupling to vent tee.
•
XIv - mAInTEnAnCE And CLEAnInG
If heating system is to remain out of service during
2.
freezing weather and does not contain antifreeze,
drain system completely. If boiler will be exposed to
freezing temperatures, drain condensate lines.
Annual examination and cleaning of boiler
components
The following service procedures must be per-
formed by a qualified service agency using the
Repair Parts manual (P/n# 240006107) for refer-
ence. The boiler owner should not attempt these
steps.
WARNING
!
Before servicing, turn off electrical power to boiler at
1.
service switch. Close manual gas valve to turn off gas
supply to boiler.
Examine flue passages by removing blower/burner
2.
assembly from casting. The procedure for examining
and cleaning the burner is described below.
Any buildup of sediment or aluminum oxide (white
3.
powdery or flaky substance) in the flue passages
must be cleaned as follows:
Remove jacket front and top panels.
•
Confirm that manual gas valve is closed and disconnect
•
gas line to gas valve at union. Then disconnect pressure
switch hoses to gas valve and air inlet.
Disconnect wires to gas valve and igniter.
•
Loosen but do not remove five nuts attaching blower
•
adapter assembly to boiler.
Remove two igniter screws and very carefully remove the
•
igniter.
Remove five nuts and remove blower adapter assembly,
•
burner, and gaskets.
Aluminum oxide deposits are water soluble and may be
•
rinsed away by inserting a hose into the burner opening of
the casting and slowly running water through the flue side
of the boiler and out the condensate drain.
