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General Information
This Single Package Electric Heating/
Electric Cooling Rooftop Unit unit has
been designed and built to provide
many years of safe and dependable
comfort, providing it is properly
installed and maintained. With regular
maintenance, this unit will operate
satisfactorily year after year. Abuse,
improper use, and/or improper
maintenance can shorten the life of
the appliance and create hazards for
you. Please read this manual carefully
to familiarize yourself with operation,
maintenance, and safety procedures
for this unit.
A regular service and maintenance
schedule should be established to
ensure effi cient and safe operation
of the unit. Contact your dealer for a
periodic unit inspection by a qualifi ed
service technician.
WARNING!
To avoid possible equipment
damage, fire, or death, the
following instructions must
b e o b s e r v e d r e g a r d i n g
unit location and operation
procedures.
Unit Location
The area around this single package
air conditioning unit and the vicinity
of any other appliances must be
kept clear and free of combustible
materials, gasoline, and other
fl ammable vapors and liquids. Do
not store or use fl ammable items such
as paint, varnish, or strippers in the
vicinity of the unit.
Do not use the area around the unit
as a storage area. This area must be
kept clear and clean. The unit must
also be kept clear of loose or exposed
insulation materials. Examine the
unit’s area when it is installed or
when insulation is added, since
some insulation materials may be
combustible.
Do not use this appliance if any part
has been under water. Immediately
call a qualifi ed service technician to
inspect the unit and to replace any
part of the electrical control system
which has been under water.
Ductwork
The duct connections must be
physically sound and sealed to the
unit’s casing.
The return air and circulating air
ductwork must not be connected
to any other heat producing device
such as a fi replace insert, stove, etc.
Doing so may result in fi re, explosion,
personal injury, carbon monoxide
poisoning, or property damage.
Operating Instructions
Cooling Operation
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 temperature
level. The outdoor fans, compressors,
and indoor blower will all cycle on and
off to maintain the indoor temperature
at the desired cooling level.
Heating Operation
1. Set the thermostat system switch to
HEAT and the thermostat fan switch
to AUTO. (See Figure 1)
2. Set the thermostat temperature
selector to the desired temperature
level. The indoor blower and optional
electric heat module will cycle
on and off to maintain the indoor
temperature at the desired heating
level.
Continuously
— Set the thermostat
fan switch to ON (may be called
CONT on some thermostat models).
(See Figure 1) The indoor blower
will start immediately, and will run
continually until the fan switch is
reset to AUTO.The continuous indoor
blower operation can be obtained
with the thermostat system switch set
in any position, including OFF. The
continuous indoor blower operation is
typically used to circulate the indoor air
to equalize a temperature unbalance
due to a solar load, cooking, or
fi replace operation
System Shutdown—
Set the
thermostat system switch to OFF and
the thermostat fan switch to AUTO.
(See Figure 1) The system will not
operate, regardless of the thermostat
temperature selector(s) setting.
To Operate the Indoor Blower
Continuously —
Set the thermostat
fan switch to ON (may be called CONT
on some thermostat models). (See
Figure 1)
The indoor blower will start immediately,
and will run continually until the fan
switch is reset to AUTO.
The continuous indoor blower
operation can be obtained with the
thermostat system switch set in any
position, including OFF.
The continuous indoor blower
operation is typically used to circulate
the indoor air to equalize a temperature
unbalance due to a solar load or
building equipment.
TEMPERATURE
SENSOR
FAN
SWITCH
SYSTEM
MODE
Figure 1. Typical Thermostat
