3
OPERATING INSTRUCTIONS
To Operate Your Heat Pump For Cooling —
1. Set the thermostat system switch to COOL
and the thermostat fan switch to AUTO.
See
Figure 1.
2. Set the thermostat temperature selector to the
desired cooling temperature. The outdoor unit
fan, the indoor blower, and the compressor
will all cycle on and off to maintain the indoor
temperature at the desired cooling level.
NOTE: If the thermostat temperature level is
re-adjusted, or if the thermostat system switch
is re-positioned, the outdoor unit fan and the
compressor may not start immediately. A
protective timer circuit holds the compressor and
the outdoor fan off for approximately six minutes
following a previous operation or the interruption
of the main electric power
To Operate Your Heat Pump For Heating —
1. Set the thermostat system switch for HEAT
and the thermostat fan switch to AUTO.
See
Figure 1.
2. Set the thermostat temperature selector to the
desired heating temperature. The outdoor unit
fan, the indoor blower, and the compressor
will all cycle on and off to maintain the indoor
temperature at the desired heating level.
NOTE: If the thermostat temperature level is
re-adjusted, or if the thermostat system switch
is re-positioned, the outdoor unit fan and the
compressor may not start immediately. A
protective timer circuit holds the compressor and
the outdoor fan off for approximately six minutes
following a previous operation or the interruption
of the main electrical power.
Emergency Heat —
Some thermostats will
include a system switch position termed EM
HT or AUX HT, etc. This is a back-up heating
mode to be used only if there is a suspected
problem. With the system switch set to EM
HT, etc., the compressor and outdoor fan will
be locked off and supplemental heat (electric
resistance heating) will be used as a source of
heat. Sustained use of electric resistance heat in
place of the heat pump will result in an increase
in electric utility costs.
Defrost —
During cold weather heating
operation, the outdoor unit will develop a coating
of snow and ice on the heat transfer coil. This
is normal and the unit will periodically defrost
itself. During the defrost cycle, the outdoor fan
will stop, while the compressor continues to run
and heat the outdoor coil, causing the snow and
ice to melt. During defrost, there may be some
steam rise from the outdoor unit as the warm coil
causes some melted frost to evaporate.
SPECIFICATIONS
Single Package Heat Pumps are designed for
outdoor rooftop or ground level slab installations.
The units are shipped ready for horizontal duct
connections and are easily converted for down
fl ow applications.
All models are shipped from the factory with
the following:
1. Zero clearance to combustibles
2. Multi-speed direct-drive blower.
3. Compressor Anti-short-cycle timer for
single phase models.
4. Blower Speed Relay.
5. H o r i z o n t a l o r D o w n f l o w d u c t
connections.
The unit dimensions are shown in
Figure 3
.
Figure 2. Thermostat Interlock System
Figure 1. Typical Thermostat
Cooling
Thermostat
Furnace
Thermostat
Double Throw
Double Pole Switch
To Furnace
R
R
To Heat Pump
TEMPERATURE
SENSOR
FAN
SWITCH
SYSTEM
MODE
