4
To start unit electric cooling:
Refer to Fig. 8 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 ex ternal manual shutoff valve.
3. Turn off the electrical power supply to the unit.
4. Remove the front access panel.
5. Move the selector switch on the internal gas valve to theOFF
position.
6. Replace the front access panel
7. Restore electrical power to the unit and set system switch to
COOL.
8. 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. 9 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 ex ternal manual shutoff valve.
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 main-
tainstheindoortemperatureat thelevel you select. Mostthermostats
of heating and cooling systems have 3 controls: a temperature con-
trol selector, a FAN control, and a SYSTEM or MODE control. Re-
fer to your thermostat owner’s manual for more information.
To better protect your investment and to eliminate unnecessary ser-
vice 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!
Step 1—Cooling Mode
With the SYSTEM control set to COOL, your unit will run in cool-
ing 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.
Step 2—Heat Pump Heating Mode
With the SYSTEM or MODE control of your idoor 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 couse, your
system will run for longer periods to maintain a comfortable envi-
ronment on cooler days and nights than on moderate ones.
Step 3—Gas Heat Mode
Your heat pump is your primary heating source. Your system is also
equipped with a supplemental gas heating source. On cold daysand
nights, your system will automatically turn on the suppmental heat
in order to maintain the level of comfort you have selected.
When your heat pump needs additional heat to keep you comfort-
able, your thermostat will turn on the supplemental gas heat.
Step 4—Defrost Mode
When your heat pump is providing heat to your home or office and
the outdoor temperature drops below 45°F(7.2°C), moisture may
begin to freeze on the surface of the coil. If allowed to build up, this
ice would impede airflow across the coil and reduce the amount of
heat absorbed from the outside air. So, to maintain energy -- efficient
operation, your heat pump has an automatic defrost mode.
The defrost mode starts at a preset time interval of 60 minutes, al-
though, it may be reset to 30, 90 or 120 minutes. Defrost will start
at the preset time only if the ice is sufficient to interfere with normal
heating operation.
After the ice is melted from the coil, or after a maximum of 10 min-
utes in defrost mode, the unit automatically switches back to normal
heating operation.
Do not be alarmed if steam or fog appears at the outdoor unit during
defrost mode. Water vapor from the melting ice may condense into
a mist in the cold outside air.
During certain weather conditions such as heavy snow and freezing
rain it is not uncommon for ice to build up on the unit grille. This is
normal for these weather conditions. Do not attempt to remove the
ice from the unit grille. This condition will not affect the proper
function of the unit and will clear within a few days.
Step 5—Emergency Heat Mode
Ifyou should haveproblemswith theheatpump portion of your sys-
tem, thismode allowsyour supplemental gasheating source to keep
your home or office warm until your heat pump can be serviced.
MAINTENANCE AND SERVICE
This section discusses maintenance that should be performed on
your system. Most maintenance should be performed by your deal-
er. You, as the owner, may wish to handle some minor maintenance
for your new unit.
Routine Maintenance
All routine maintenance should be handled by skilled, experienced
personnel. Your dealer can help you establish a standard procedure.
For your safety, keep the unit area clear and freeof combustible ma-
terials, gasoline, and other flammable liquids and vapors.
To assure proper functioning of the unit,flow of condenser air must
not be obstructed from reaching the unit. Clearance from the top of
the unit is 48 in. (1219 mm).Clearance of at least 36 in.(914 mm) is
required on sides except the power entry side (42 in. clearance)
(1067mm)and theduct side (12 in. minimum clearance) (305mm).
Maintenance and Care for the Equipment Owner
Before proceeding with those things you might want to maintain
yourself, please carefully consider the following:
FIRE, EXPLOSION, ELECTRICAL SHOCK AND
CUT HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
1. TURN OFF ELECTRICAL POWER TO YOUR UNIT
BEFORE SERVICING OR PERFORMING
MAINTENANCE.
2. When removing access panels or performing maintenance
functions inside your unit, be aware of sharp sheet metal
parts and screws. Although special care is taken to reduce
sharp edges to a minimum, be extremely careful when
handling parts or reaching into the unit.
!
WARNING
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