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4. Boiler Troubleshooting
Fault
Cause
Remedy
Boiler smokes, brownish
liquid present in the
negative pressure
chamber
Insufficient draught
Seal the place where the smoke
conduit enters the chimney
Too low chimney cross-
section
Too low chimney height
Enlarge the chimney opening, e.g.
demolish a wall splitting the
chimney into two flue ducts,
combining it with the adjacent
ventilation channel (at least 2m
above the base of the
MODERATOR boiler, increase
Another device (a boiler or a
cooker/kitchen oven) is
connected to the same
chimney.
Seal the place where the outlet
from the boiler enters the chimney
so as to prevent cold air from
being sucked in
Blocked chimney
Clean the chimney by burning dry
wood for 2 days in temp. at least
70
o
C
Frequent use of wet fuel
Burn through with dry fuel
Too low return temperature
Raise the return temperature to the
recommended 55
o
C. Install a
mixing valve.
Fuel burns too fast despite
doors closed
Too high chimney cross-
section
Use chimney damper
4.1. Maintenance and overhauls
Boiler maintenance during the heating season involves its periodical
cleaning (par. 3.4). After the heating season, the boiler shall be thoroughly
cleaned (Fig. 13), its internal surfaces shall be protected with oil.
5. Safe operation conditions
The main precondition of boiler safe operation is construction of its
installation and protections according to Polish standards.
In order to maintain safe operating conditions of the boiler, it is necessary
to follow the principles stated below:
