4
• This manual provides the installation
instructions for this controller. Refer to the
included wiring diagrams to connect the
controller to the indoor unit.
• The controller uses low voltage. Keep a
minimum distance of 12” (305 mm) between
low voltage control wire and high voltage
power wires.
Power wiring between controller and first
indoor unit:
• Minimum 18 AWG stranded, shielded cable
up to 164 feet (50 m).
• Ensure there are no gaps between the con-
troller back cover and the mounting surface.
• Fill any holes in the wall behind the control-
ler to avoid false readings from infiltration.
• Ground the shielded control wiring.
• Do not use a megger to test insulation.
Communication wiring between indoor
units:
• Minimum 18 AWG stranded, shielded cable.
Installation
CAUTION
!
Do not install controller in areas where
harmful gases containing sulfur or
other damaging agents may exist or the
controller may be damaged.
Clean controller using a clean, damp
cloth. Do not spray cleanser on or around
controller.
Be sure that power supply has been
turned off before beginning installation.
Do not operate controller with wet hands.
WARNING
!
IMPORTANT
Read all of the information in this manual
before using this controller. All wiring must
conform to local and national building and
electrical codes and ordinances. This is a
12 VDC controller. Do not install on voltages
higher than 12 VDC.
IMPORTANT
Electrostatic discharge can affect electronic
components. Take precautions to neutralize
electrostatic charge by touching your hand
and tools to metal prior to handling the con-
trol.
