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Low Voltage
Connections
Fan Off
Adjustments
Style A
B2
Pins (4)
B1
B3
Style B
Jumper
B4
Style B
Figure 31
Ignition Control
(Viewed in an Upflow Installation)
Style A
60
Second
Delay
90
Second
Delay
120
Second
Delay
180
Second
Delay
Figure 32
Switches
(Viewed in an Upflow Installation)
XIII. Maintenance
WARNING
To avoid electrical shock, injury or death,
disconnect electrical power before
performing any maintenance.
CAUTION
If you must handle the ignitor, handle with
care. Touching the ignitor body with bare
fingers, rough handling, or vibration could
result in early ignitor failure. Only a qualified
servicer should ever handle the ignitor.
Have the furnace checked at least once every year, before
the heating season begins, to be sure that there is ad-
equate combustion air and that the vent system is working
properly.
Have vent pipe checked to be sure it is not blocked by
debris, which could permit fumes to enter the house.
Replace any leaking sections of vent pipe.
For a GUD two pipe installation, inspect the combustion
air inlet screen for blockage. Clean screen when needed.
AIR FILTER
See the Specification Sheet for filter sizes.
This furnace is equipped with a permanent type washable
high velocity filter(s). Filter(s) should be inspected and
cleaned every two months or as required. If the replace-
Style B
ment of the filter(s) becomes necessary, it must be replaced
B2
with a filter(s) of the same type and size.
B1
B3
Remember that dirty filters are the most common cause of
B4
inadequate heating or cooling performance.
B2
B1
B3
B4
B2
B1
B3
B4
To remove the filter, turn the latches on lower door. Remove
B2
the door. The blower motor will automatically stop through
B1
B3
the interlock switch.
B4
The filter is designed for high velocity heating and cooling
applications. Filters must be inspected, cleaned or changed
every two months or as required. It is the owner's respon-
sibility to keep air filters clean. Note: Dirty filters are the
most common cause of inadequate heating or cooling
performance.
To remove the filter contained in the furnace retaining rails,
disconnect electrical power to the furnace and remove the
lower door by turning the door latches 1/4 turn.
26
WARNING
Never operate furnace without a filter
installed as dust and lint will build up on
internal parts resulting in loss of efficiency,
equipment damage and possible fire.
WARNING
Disconnect the electrical power to the
furnace before removing the filter or
performing any other maintenance.
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