11
14 Start-Up Procedure
• Prior to start-up, ensure that all electrical wires are prop-
erly sized and all connections are properly tightened.
• All panels must be in place and secured. For Air Tight
application, gasket must be positioned at prescribed
locations to achieve 2% leakage.
• Tubing must be leak free.
• Condensate line must be trapped and pitched to allow
for drainage.
• Low voltage wiring is properly connected.
• Auxiliary drain is installed when necessary and pitched
to allow for drainage.
• Unit is protected from vehicular or other physical dam-
age.
• Return air is not obtained from, nor are there any return
air duct joints that are unsealed in, areas where there
may be objectionable odors, flammable vapors or prod-
ucts of combustion such as carbon monoxide (CO),
which may cause serious personal injury or death.
15 Regular Maintenance
HIGH VOLTAGE!
Disconnect ALL power before servicing or
installing this unit. Multiple power sources may
be present. Failure to do so may cause property
damage, personal injury or death.
The only item required to be maintained on a regular basis by
the user is the circulating air filter(s). Filter should be cleaned
or replaced regularly, typically once per month. A certified
service technician must perform all other services.
IMPORTANT NOTE: If thumb screws are used to access the
filter, ensure the washer installed on the screw behind the
access panel remains in place after re-installation.
24 VOLT THERMOSTAT WIRING - NON-COMMUNICATING
THERMOSTAT CONNECTIONS
NOTE: Wire routing must not interfere with the circulator
blower operation or routine maintenance.
The air handler’s integrated control module provides termi-
nals for “Y1” and “Y2” and “W1” and “W2” thermostat con-
nections. This allows the air handler to support the systems
shown in the following table. Refer to the following figures for
typical connections to the integrated control module. Ther-
mostat wiring entrance holes are located in the top of the
blower. Wire routing must not interfere with circulator blower
operation or routine maintenance.
COOLING HEAT PUMP HEATING ELECTRIC HEATING
1-STAGE ------ 1- or 2-STAGE
2-STAGE ------ 1- or 2-STAGE
1-STAGE 1-STAGE ------
2-STAGE 2-STAGE ------
1-STAGE 1-STAGE 1- or 2-STAGE
2-STAGE 2-STAGE 1- or 2-STAGE
Table 8
NOTE: A removable plug connector is provided with the
control to make thermostat wire connections. This plug may
be removed, wire connections made to the plug, and replaced.
It is
STRONGLY recommended that you do not connect
multiple wires into a single terminal. Wire nuts are
recommended to ensure one wire is used for each terminal.
Failure to do so may result in intermittent operation.
Air Handler Integrated
Control Module
Typical Single-Stage Cool,
Single-Stage Heat Thermostat
Dehumidistat
[Optional]
Remote Condensing Unit
(Single-Stage AC)
NEU
HOT
12RCG
W1 Y1 Y2
O
DEHUM
RCG
W1 Y1
RC
Y
Place Jumper Between Y1
and O for Proper
Dehumidification Operation
and Proper Ramping
Profile Operation
W2
Typical Single-Stage Cooling with Single-Stage Heating
______________________________________
Air Handler Integrated
Control Module
Typical Two-Stage Cool,
Two-Stage Heat Thermostat
Dehumidistat
[Optional]
Remote Condensing Unit
(Two-Stage AC)
NEU
HOT
12RCG
W1 W2 Y1 Y2
O
DEHUM
RCG
W1 W2 Y1 Y2
RC
Y1 Y2
Place Jumper Between Y1
and O for Proper
Dehumidification Operation
and Proper Ramping
Profile Operation
Typical Two-Stage Cooling with Two-Stage Heating
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