Page 52
LGH/LCH420, 480, 540, 600
Service
IMPORTANT
Mineral oils are not compatible with R410A. If oil must
be added, it must be a polyol ester oil.
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dan
gerous operation. Verify proper operation after ser
vicing.
The unit should be inspected once a year by a qualified
service technician.
A-Filters
Units are equipped with eleven 16 X 25 X 2” (406 X 635 X
51mm) or 16 X 25 X 4” (406 X 635 X 102mm) supply air
filters. Filters should be checked monthly and replaced
when necessary with filters of like kind and size. Remove
filters as shown in figure 55. Take note of air flow direction
marking on filter frame when reinstalling filters. See figure
56 for orientation of replacement filters.
NOTE-Filters must be U.L.C. certified or equivalent for use
in Canada.
FIGURE 55
REMOVE FILTERS
PULL TO
REMOVE
FILTERS
FIGURE 56
ORIENT REPLACEMENT FILTERS
Units equipped with optional outdoor air intake hoods
contain four 20 X 25 X 2” (508 X 635 X 51mm) aluminum
cleanable filters. See figure 57 for location of filters. On
horizontal air discharge installations, remove two screws
and pivot screen to access filters. See figure 46.
FIGURE 57
OUTDOOR AIR FILTERS
RETURN AIR
END OF UNIT
OUTDOOR AIR FILTERS -
HORIZONTAL AIRFLOW
OUTDOOR AIR FILTERS
- VERTICAL AIRFLOW
