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Page 4 of 13 506252-01Issue 0902
not be sized by matching the dimensions of the duct
connections on the unit.
Outdoor ductwork must be insulated and waterproofed.
Equipment is shipped for side ductwork connection. The
unit can be converted to bottom ductwork connection by
removing the duct covers located over the bottom duct
openings and placing these covers over the side duct
openings (see Figure 4).
To remove the bottom duct cover over supply opening:
1. Remove screw on cover nearest side opening.
2. Lift end of cover slightly and push to slide back screw/
pin free from duct flange.
3. Slide duct cover out the side duct opening.
Electrical Wiring
All wiring should be done in accordance with the
National Electrical Code, ANSI/NFPA No. 70 (latest
edition); Canadian Electrical Code Part 1, CSA C22.1
(latest edition); or local codes where they prevail. Use
wiring with a temperature limitation of 75°C minimum. Run
the electric power supply through a fused disconnect switch
to the connection box of the unit and connect as shown in
the wiring diagram located on the inside of the control access
panel.
Filters
Air filters are to be used with this heating/cooling unit. Filters
are not factory supplied in the unit. However, a filter frame
accessory is available from the manufacturer that allows
filters to be installed within the unit. If the filter frame
accessory is not used, a filter must be installed in the duct
work by the installer. Filters must always be installed ahead
of the evaporator coil and must be kept clean or replaced.
Dirty filters will reduce the airflow of the unit. Filters should
be sized in accordance with Table 2.
Figure 4
Removing Bottom Duct Covers
Base
1. Remove screw and lift.
2. Slide cover to free back pin.
1
2
When fastening ductwork to side duct flanges
on unit, insert screws through duct flanges only;
do not insert screws through casing. If using
bottom duct work, do not use screws to secure
ductwork to bottom duct opening under drain
pan side. Using screws to secure bottom duct
may damage drain pan.
CAUTION
Table 2
Minimum Required Surface Area
for Disposable Filters
gnilooClanimoN
aerAretliF
).tf.qs(
000,4276.2
000,03 33.3
000,6300.4
000,24 76.4
000,8433.5
000,06 76.6
Line voltage is present at all components when
unit is not in operation on units with single pole
contactors. Disconnect all remote electric power
supplies before opening access panel. Unit may
have multiple power supplies. Failure to
disconnect all power supplies could result in
personal injury or death.
WARNING
When connecting electrical power and control
wiring to the unit, waterproof type connectors must
be used so that water or moisture cannot be
drawn into the unit during normal operation.
CAUTION