30
XiV. MaiNteNaNce aND cleaNiNg
annual sHut doWn pRocEduRE (End of each
heating season)
1. Follow the instructions in
“To Turn Off Gas To Ap
-
pliance”
in Section XII.
2. If heating system is to remain out of service during
freezing weather, and does not contain antifreeze,
drain system completely. If boiler will be exposed
to freezing temperatures, drain condensate lines.
Otherwise, do not drain system or boiler.
annual EXaMInatIon and clEanIng oF
BoIlER coMponEnts
the following service procedures must be per-
formed only by a qualified service agency. Boiler
owner should not attempt these procedures.
1. Before servicing, turn off electrical power to boiler
at service switch. Close manual gas valve to turn
off gas supply to boiler.
2. Examine flue passages by removing blower as
-
sembly from casting as shown in the separately
provided
“Repair Parts Manual.”
The procedure for
examining and cleaning the burner is described
below.
Any buildup of sediment or aluminum oxide (white
powdery or flaky substance) in the flue passages
must be cleaned as follows:
a. Remove jacket front and top panels.
b. Confirm that manual gas valve is closed and
disconnect gas line to gas valve at union.
c. Disconnect wires to gas valve and igniter.
d. Remove air inlet assembly from gas valve.
e. Loosen but do not remove five nuts attaching
blower adapter assembly to boiler.
f. Remove two igniter screws and very carefully
remove the igniter.
the igniter element is
very sensitive. Do not touch the igniter el-
ement with your fingers or hands as oils
or debris will cause premature failure.
g. Remove five nuts and blower adapter assem
-
bly. Remove burner and gaskets.
h. Aluminum oxide deposits are water soluble
and may be rinsed away with spraying or run-
ning water.
i. Use a flexible handle nylon brush to loosen
sediment and aluminum oxide on all exposed
heating surfaces of boiler (see
“Repair Parts
Manual”
for diagram).
Be sure that brush
does not get stuck in heat exchanger!
j. After brushing and rinsing, remove any re-
maining loosened sediment using a shop
vacuum with a snorkel attachment.
k. 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.
l. Reinstall burner and gaskets and position
blower adapter assembly over studs. Install
five nuts but do not tighten. Reinstall ig
-
niter and igniter gasket and fasten with two
screws.
the igniter element is very sensi-
tive. Do not touch the igniter element with
your fingers or hands as oils or debris
will cause premature failure
Tighten five
nuts holding blower adapter assembly.
m. Connect gas line to gas valve; air inlet as-
sembly to gas valve (using 2” x 1½” flexible
coupling); pressure switch hose to gas valve
and air inlet assembly; 2” flexible coupling
to boiler exhaust port; igniter wires; and gas
valve wires.
3. Visually inspect the condensate trap. Refer to re-
pair parts diagrams. Any foreign material or debris
that is visible in the condensate lines needs to be
cleaned out as described below.
a. Inspect for sediment or blockage.
b. Flush out with water or vacuum.
c. Follow the instructions under
“Near Boiler
Piping”
in Section XII for filling condensate
trap with water.
4. Inspection of the flue connector requires the follow
-
ing steps. Refer to the
“Repair Parts Manual”
for
diagram.
a. Loosen clamp on draft inducer end of 2” flex
-
ible coupling that connects vent tee to ex-
haust port.
b. Inspect interior of vent tee. Any buildup of
sediment on the inside surface must be
cleaned.
c. Reconnect the 2” flexible coupling to the draft
inducer outlet.
