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A
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A. CLEAN THE FLUEWAYS (See Figure 30).
1. For access to the combustion chamber remove the
two (2) 3/8" - 16 cap screws. If boiler is equipped
with fl exible fuel line(s), swing door open.
2. Remove the two smoke box clean-out covers from
the rear smoke box by removing the four 5/16"-18
hex head bolts. It is NOT necessary to remove the
vent connector from the smoke box to clean boiler.
If necessary, remove the vent connector if there is
evidence of heavy soot accumulation in the boiler
or to inspect bse of chimney for condensate or
accumulation of debris.
3. Remove the baffl es (if installed) from the fl ue
passages. There is a pair of baffl es in each boiler.
The baffl es are installed in the 3
fl ueways) on the MPO84, and in the 2
inner fl ue ways) on the MPO147, MPO189 and
MPO231.
4. Clean the 3
rd
Pass – Insert a 2" dia. x 42" long
wire or fi ber bristle brush into each of the two 3
passes. Using long strokes push the brush all the
way through the boiler until the brush has exited
the smoke box opening. Pull the brush all the way
forward until it has exited the front of the boiler.
Continue this operation for the entire height of the
fl ue way until clean. Repeat the operation for the
rd
other 3
pass fl ue way.
nd
5. Clean the 2
Pass - Insert a 2" dia. x 42" long wire
or fi ber bristle brush into each of the two 2
Using long strokes push the brush all the way
through the boiler until the brush hits the back wall
of the reversing chamber. Pull the brush all the way
forward until it has exited the front of the boiler.
Continue this operation for the entire height of the
fl ue way until clean. Repeat the operation for the
nd
other 2
pass fl ue way.
6. Vacuum the loose debris in the bottom of the
combustion chamber and smoke box.
B. CLEAN THE COMBUSTION CHAMBER
– Use a wire or fi ber bristle brush to clean the surfaces
of the combustion chamber. Vacuum all of the loose
debris in the bottom of the combustion chamber.
SECTION X: BOILER CLEANING
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pass (two outer
nd
pass (two
nd
passes.
W
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C. AFTER CLEANING, vacuum all remaining debris
as necessary. Inspect burner swing door insulation, and
rope gasket for signs of damage. If damaged, replace as
needed.
D. REASSEMBLE BOILER.
D
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1 Insert the baffl es (if originally installed) into the
correct fl ue way. The baffl es are installed in the 3
pass (two outer fl ueways) on the MPO84, and in
the 2
MPO189 and MPO23.
2. Attach the smoke box clean-out covers onto the
rear of the boiler. Verify that the rope gasket is
in good working order before assembly. Replace
rd
rope gasket if necessary. Use the 3/8" hardware
originally removed. Do not over tighten. They
should be snug but not bottomed out.
W
h
e
n
s
u
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d
Tighten swing door hardware to provide adequate
seal to rope gasket around perimeter of door.
Use an alternating tightening method from right side
to left side cap screw to pull door tight equally.
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