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It is recommend that the boiler and flue/combustion
air system be inspected and maintained annually by
a qualified technician.
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To gain access to the inside of the unit, first remove
the control panel cover escutcheon by grasping it on
both sides and pulling directly outward towards you
and up. Remove any front panel screw(s) and remo-
ve the front panel by pulling the top out towards you
and then lifting up to free the bottom from the moun-
ting pins. Remove the top cover by simply pulling it
up. Remove the electrical terminal block protection
plate by removing the screws in the rear and lifting.
Remove the control panel cover screws and remove
the control panel cover.
The water can be bled from the unit by opening the
drain-cock on the base of the boiler shell using the
tool supplied.
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• Remove the screws (B) from the cast-iron boiler
shell cover (C)
• Remove the flue outlet baffle (D)
• Remove the combustion baffles (E)
• Clean the inner walls of the boiler shell
• Reassemble all the parts the way they were re-
moved, positioning the flue outlet (D) with its
centering screw (P) towards the front of the boi-
ler, then positioning the boiler shell cover (C)
arrow marker opposite the centering screw (P)
• Replace the screws (B) in the boiler shell cover.
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• Remove the wing nut (F) from the condenser
top cover (G) and remove the cover
• Remove the condenser access plug (7)
• Clean the condenser tubes (H) using a bottle
brush or similar tool
• Observe that the combustion products can flow
freely in the condenser tubes
• Replace the condenser access plug (7) and the
top cover (G), making sure that the seal (I) is
properly positioned when replacing the cover
• Make sure that the seal (I) on the cover and the
access plug is in good condition.
NOTE: If after cleaning the condenser, the tempe-
rature of the flue gasses still exceeds 250
deg. F (120C), perform a boiler check.
B
B
C
B
C
B
E
14
14
D
P
G
F
4
F
G
I
H
4
7
6