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3. HEAT-COOL THERMOSTAT OPERATION
Heat-Cool Thermostat: Your thermostat should
be located on an inside wall approximately fi ve
feet from the fl oor away from drafts and doors.
Do not locate lamps or other objects near the
thermostat which could affect its operation or
block a free fl ow of air.
The heat-cool thermostat is equipped with a
system HEAT-COOL switch, which provides
a positive means of preventing simultaneous
operation of the heating and cooling mode. The
thermostat is also equipped with an AUTO-ON
fan switch which allows the home owner to
operate the indoor blower when air circulation
is desired.
SYSTEM OPERATION
1.
PRE-START CHECK LIST
The following check list should be observed prior
to starting the unit.
Is the unit level? It should be level or slightly
slanted toward the drain for proper conden-
sate drainage.
Low
Voltage
Connections
Low
Voltage
Entry
Condensate Drain
Figure 4. Power Entry and Hook Up
Contactor
Lugs
L2 (White)
L1 (Black)
Ground
(Green)
High Voltage Entry
Is there free air fl ow to and from the
condenser? A one foot clearance around
the coil, and six foot clearance above the
fan?
Is the wiring correct according to the wiring
diagram and electrical codes?
Are all the wiring connections tight? Check
the condenser fan to make sure it turns
freely.
Is the thermostat wired correctly? Is it
installed in a proper location?
2.
START-UP PROCEDURE
a.
Set the system switch to the OFF position.
b.
Dial thermostat setting as high as it will go.
c.
Turn on power supply at the circuit breaker.
d.
Set the system switch to ON or COOL.
Set the temperature setting to below room
temperature. Verify that the indoor blower,
outdoor fan, and compressor are energized
and the cooling function starts.
e.
Verify that the discharge air grilles are
adjusted and the system is balanced.
f.
Verify that there are no air leaks in the duct
work.
g.
Verify that the condensate drain is properly
installed and that it functions correctly.
h.
Dial the thermostat higher than room tem-
perature. The unit should stop.
i.
If using a combination heating-cooling ther-
mostat, set to the HEAT position. Proceed
to check for correct furnace operation.
j.
Verify that the furnace controls and burners
or heating elements operate correctly.
k.
Instruct the owner on unit operation, fi lter
servicing, and proper thermostat opera-
tion.
Furnace
C
Y
Figure 5. Low Voltage Connections
Air Conditioner
BLACK
YELLOW
7
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