035-18575-001-A-1102
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Unitary Products Group
These 4-pipe condensing units can also be used with
two appropriately sized indoor units. In this case, each
indoor unit will have it’s own thermostat. One thermo-
stat will connect to “Y1” and “Y2” on the Simplicity
control board and the other will connect to “Y3” and
“Y4”.
OPERATION WITH A TWO-STAGE THERMOSTAT
If the total system is to be controlled with a 2-stage
thermostat (HA300):
1.
Terminals Y1 and Y2 of the Simplicity
control
board controlling system one, should be connected
to stage one and two of the thermostat.
OPERATION WITH A FOUR-STAGE THERMOSTAT
If the total system is to be controlled with a 4-stage
thermostat (HB360, HB480 and HB600):
1.
Terminals Y1 and Y2 of the Simplicity
control
board controlling system one, should be connected
to stage one and two of the thermostat.
2.
Terminals Y3 and Y4 of the Simplicity
control
board controlling system two, should be connected
to stage three and four of the thermostat.
SECURE OWNER'S APPROVAL
When the system is functioning properly, secure the
owner's approval. Show him the location of all discon-
nect switches and the thermostat. Teach him how to
start and stop the unit and how to adjust temperature
settings within the limitations of the system.
MAINTENANCE
CLEANING CONDENSER SURFACE
Dirt should not be allowed to accumulate on the con-
denser coils or other parts in the condenser air circuit.
Clean as often as necessary with a brush, vacuum
cleaner attachment or other suitable means.
LUBRICATION
These fan motors are equipped with factory lubricated
and sealed ball bearings. They do not require any
maintenance.
COMPRESSOR REPLACEMENT
Obtain replacement compressor or parts from your
local Distributor.
FIGURE 11 - FAN ORIENTATION CONTROL BOX
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