4
2. Close the external manual shutoff valve.
3. Turn off the electrical power supply to the unit.
4. Remove the control access panel. (See Fig. 2.)
5. Move the selector switch on the internal gas valve to the
OFF position.
6. Replace the control access panel.
To start unit electric cooling:
Refer to Fig. 6 while proceeding with the following steps.
1. Set the temperature selector on room thermostat to highest
temperature setting and set system SWITCH to OFF.
2. Close the external manual shutoff valve, if not already
closed.
3. Turn ON the electrical power supply to the unit.
4. Set system switch to COOL.
5. Set the temperature selector on room thermostat slightly be-
low the room temperature to start unit.
To shut off unit electric cooling:
Refer to Fig. 7 while proceeding with the following steps.
1. Set the temperature selector on room thermostat to highest
temperature setting and set system SWITCH to OFF.
2. Close the external manual shutoff valve, if not already
closed.
3. Turn off the electrical power supply to the unit.
NOTE
: Heat Pump heating mode procedure is similar to electric
cooling mode except thermostat mode is HEAT and thermostat
must operate on first stage heating above the balance point that has
been determined by the Dealer.
OPERATING YOUR UNIT
The operation of your unit is controlled by the indoor temperature
control (thermostat). You simply adjust the thermostat and it
maintains the indoor temperature at the level you select. Most
thermostats of heating and cooling systems have 3 controls: a
temperature control selector, a FAN control, and a SYSTEM or
MODE control. Refer to your thermostat owner’s manual for more
information.
To better protect your investment and to eliminate unnecessary
service calls, familiarize yourself with the following facts:
1. During heat pump heating, increasing the thermostat setting
more than 2
_
F (1.1
_
C) may cause the supplemental gas heat
to be turned on for a short period of time to satisfy the
thermostat. Needless use of the supplementary heat reduces
potential energy savings.
2. Ice or frost tends to form on the coil during winter heating
operation. Your heat pump is designed to automatically melt
the ice.
When in this defrost cycle, it is normal for steam
or fog to rise from the outdoor unit.
Do not be alarmed!
Cooling Mode
With the SYSTEM control set to COOL, your unit will run in
cooling mode until the indoor temperature is lowered to the level
you have selected. On extremely hot days, your unit will run for
longer periods at a time and have shorter “off” periods than on
moderate days.
Heat Pump Heating Mode
With the SYSTEM or MODE control of your indoor thermostat set
to HEAT, your unit will run in heat pump heating mode until room
temperature is raised to the level you have selected. Of course, your
system will run for longer periods to maintain a comfortable
environment on cooler days and nights than on moderate ones.
Gas Heat Mode
Your heat pump is your primary heating source. Your system is
also equipped with a supplemental gas heating source. On cold
days and nights, your system will automatically turn on the
supplemental heat in order to maintain the level of comfort you
have selected.
When your heat pump needs additional heat to keep you
comfortable, your thermostat will turn on the supplemental gas
heat.
