Install ductwork in accordance with NFPA 90B and any local
The use of flexible, noncombustible connectors between the
main trunk ducts and the supply and return air plenums is
recommended to minimize vibration transmission.
Plenums must be individually sealed to heat pump or
condensing unit casing with ducts terminating inside the
Flashing used to cover ductwork must permit removal of
access panels and top. See "Minimum Clearances" in the
"Locations Requirements" section.
Filters are not supplied with these heat pumps or condensing
units; however, filters must be used. It is the installer's
responsibility to install a filter rack with the ductwork and to
install properly sized filters in accordance with the Minimum
Required Surface Area for Disposable Filters chart.
Electrical Shock Hazard
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.
A. Blower access panel
B. Heater blockoff
1. Disconnect power.
2. Remove the heater compartment access panel.
Install Accessory Heater
C. Heater kit
D. Heater compartment access panel
All return air must pass through a filter before entering the heat
pump or condensing unit. An electronic air cleaner, filter rack or
other accessible filter arrangement must be installed in the return
air ductwork. Minimum recommended filter areas are listed in the
Minimum Required Surface Area for Disposable Filters chart, and
are based on a face velocity of 325 ft (99.1 m) per min. for
disposable filters and 525 ft (160 m) per min. for cleanable filters.
Minimum Required Surface Area for Disposable Filters
3. Remove the heater blockoff by removing the 4 screws
holding it in place.
4. Insert the heater kit into the control panel and fasten in the
same mounting holes.
5. Disconnect the plugs connecting the no-heat wire harness to
the control assembly wire harness.
6. Remove the no-heat wire harness plugs.
A. No-heat wire harness
B. Control assembly wire harness
C. Heater wire harness
7. Plug the heater wiring harness into the control assembly wire
8. See "Make Electrical Connections" for instructions on
connecting power to the heater kit.
9. Replace the heater compartment access panel.
10. Reconnect power.
Filter Area (sq. ft)