23
MAINTENANCE
WARNING
HIGH VOLTAGE
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එඖඛගඉඔඔඑඖඏගඐඑඛඝඖඑග0ඝඔගඑඔඍඟඍකඛඝකඋඍඛ
ඕඉඡඊඍකඍඛඍඖග)ඉඑඔඝකඍගඌඛඕඉඡඋඉඝඛඍ
කඍකගඡඌඉඕඉඏඍඍකඛඖඉඔඑඖඒඝකඡකඌඍඉගඐ
Have the gas heating section of the unit checked at least
once a year before the heating season begins, to be sure
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blocked by debris, which would prevent adequate combus-
tion air and a properly operating vent system.
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heating or cooling performance. Filter inspection should be
made at least every two months; more often if necessary
because of local conditions and usage.
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washed with water, thoroughly dried and sprayed with a
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should last several years. However, should one become
torn or uncleanable, it should be replaced.
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important in installations with extended periods of direct
sunlight.
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spected annually and cleaned as frequently as necessary
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&ඖඌඍඖඛඍක(ඞඉකඉගකඉඖඌ,ඖඌඝඋඍඌ'කඉඎග0ගකඛ
Bearings on the air circulating blower motor, condenser
motor and the combustion fan motor are permanently lubri-
cated. No additional oiling is required.
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by the fuel or combustion air supply, can be removed by
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After cleaning, the microamp signal should be stable and in
the range of 4 - 6 microamps DC.
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At the start of each heating season, inspect and, if neces-
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&ඔඍඉඖඑඖඏ)ඔඝඍ3ඉඛඛඉඏඍඛ4ඝඉඔඑඎඑඍඌ6ඍකඞඑඋඍක2ඖඔඡ
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2. Remove burner assembly by disconnecting the gas
line and removing the manifold bracket from the parti-
tion panel.
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the collector box cover from the partition panel.
4. The primary heat exchanger tubes can be cleaned
using a round wire brush attached to a length of high
grade stainless steel cable, such as drain cleanout
cable. Attach a variable speed reversible drill to the
other end of the spring cable. Slowly rotate the cable
with the drill and insert it into one of the primary heat
exchanger tubes. While reversing the drill, work the
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cleaning. Use a large cable for the large tube, and
then repeat the operation with a small cable for the
smaller tube. Repeat for each tube.
5. When all heat exchanger tubes have been cleaned,
replace the parts in the reverse order in which they
were removed.
6. To reduce the chances of repeated fouling of the heat
exchanger, perform the steps listed in “Startup, Adjust-
ments, and Checks”.
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