9
• Follow installation instructions provided
with each heater kit.
• Installation is most easily accomplished
before making duct or electrical connec-
tions.
• The blower must be set to high speed for
electric heat operation.
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
condensate drainage.
Is the unit installed with the proper clear-
ances (See Figure 2)?
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 overcurrent protection properly
sized?
Is the thermostat wired correctly? Is it
installed in a proper location?
2. START-UP PROCEDURE
a. Set the system switch to the OFF posi-
tion.
b. Dial thermostat setting as high as it will
go.
c. Turn on power supply at the disconnect
switch.
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.
Figure 10. Low Voltage Connections
RED
R
YELLOW
Y
GREEN
G
BROWN
W
Optional
Outdoor Thermostat
(Field Supplied)
ORANGE
RED
R
YELLOW
Y
GREEN
G
BROWN
W
ORANGE
4 Wire Heat/Cool Thermostat
Two Stage Electric Heat
Single Stage Electric Heat
RED
R
YELLOW
Y
GREEN
BROWN
2 Wire Cooling Thermostat
Control Wire Legend
Green - Blower Relay
Red - Transformer
Yellow - Cooling 1st
Brown - Heating 1st
Orange - Heating 2nd
24V
Stage
Stage
Stage
