ClimateMaster ACL2120CAZ, Installation Instructions Manual

Page: 26 / 52

26
AH AIR HANDLER RELAY COIL
CC CONTACTOR
HR HEAT RELAY
CT CONTROL TRANSFORMER
TB TERMINAL BLOCK
LEGEND
CC (121)
TB (150-240)
ORANGE YELLOW BROWN RED
CT
Wir
ing
WARNING:
Turn off electric power
at the fuse box or service panel before making
any electrical connections. Also, the ground
connection must be completed before making line
voltage connections. Failure to do so can result in
electrical shock, severe personal injury, or death.
Running low-voltage wires in conduit with line
voltage power wires is not recommended. Low-
voltage wiring is to be connected to the pigtails
hanging down from the bottom of the control box.
A thermostat and a 24-volt, 75 VA (10-15 ton)
or 100 VA (20 ton) minimum transformer are
required for the control circuit of the system.
The appropiately sized transformer is supplied in
the outdoor unit from the factory. See the wiring
diagram for reference. Use “Wire Size” guide
below to size the 24-volt control wiring.
Do not use phone cord to connect indoor and
outdoor units and thermostat. This could damage
the controls and may not be adequately sized for
the control’s electrical load.
FIELD WIRE SIZE FOR 24-VOLT
THERMOSTAT CIRCUITS:
Runs up to 100 ft [30.5 m]: 18 AWG
Runs over 100 ft [30.5 m]: 16 AWG
NOTICE: Do not use control wiring smaller than
No. 18 AWG between thermostat and outdoor unit.
4.0 INSTALLATION
4.8 Control Wiring
4.9 Typical Field Wiring Connections
The following diagram shows the typical wiring
connections for a two-stage condensing unit
and an air-handler with electric heat.
TYPICAL FIELD WIRING CONNECTIONS