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4.0 INSTALLATION
Wiring
•
After adequate evacuation, open both service
valves by removing both brass service valve caps
with an adjustable wrench. Insert a 3/16” [5 mm]
or 5/16” [8 mm] hex wrench into the stem and turn
counterclockwise until the wrench stops.
•
If not already connected from evacuation process,
gauges must be connected at this point to check
and adjust charge.
IMPORTANT:
Compressors
(especially scroll type) should never be used to
evacuate the air conditioning system because internal
electrical arcing in near vacuum conditions may result
in a damaged or failed compressor. Never run a scroll
compressor while the system is in a vacuum or com
-
pressor failure will occur.
4.8 Final Leak Testing
After the unit has been properly evacuated and
service valves opened, a halogen leak detector should
be used to detect leaks in the system. All joints and
piping within the outdoor unit, evaporator, and inter
-
connecting tubing should be checked for leaks. If a
leak is detected, the refrigerant should be recovered
before repairing the leak. The Clean Air Act prohibits
releasing refrigerant into the atmosphere.
4.9 Control Wiring
WARNING:
Turn off electrical 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.
4.9.1EcoNet Communications
The EcoNet enabled (-)A20 Series condensing units
are specifically designed to be matched with an
EcoNet enabled air-handler or gas furnace and the
EcoNet Control Center. While they are also designed
to be controlled by a conventional 24VAC 2-stage ther
-
mostat, many features and benefits are lost. Therefore,
a conventional 24VAC 2-stage thermostat should only
be used in temporary emergency situations until
communication issues with the EcoNet control
system are resolved.
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4.9.2 EcoNet Control Center
Installation
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The EcoNet Control Center should be mounted
4 to 5 feet above the floor on an inside wall of
the living room or a hallway that has good air
circulation from the other rooms being controlled
by the Control Center. It is essential that there
be free air circulation at the location of the
same average temperature as other rooms
being controlled. Movement of air should not be
obstructed by furniture, doors, draperies, etc. The
Control Center should not be mounted where it will
be affected by drafts, hot or cold water pipes or air
ducts in walls, radiant heat from fireplace, lamps,
the sun, T.V. or an outside wall. See instructions
packaged with Control Center for detailed
mounting and installation instructions.
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4.9.3 EcoNet Communication
Wiring Connections
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The four 18 AWG low-voltage control wires must
be installed from the EcoNet™ Control Center to the
indoor unit and from the indoor unit to the outdoor unit.
The wire length between the Control Center and indoor
unit should not be greater than 100 feet [30.5 m]. The
wire length between the indoor unit and outdoor unit
should not be greater than 125 feet [38.1 m].
Running low-voltage wires in conduit with line voltage
power wires is not recommended. Low-voltage wiring
must be connected to the low voltage terminal block
on the Variable Speed Outdoor Control. The terminal
block can be unplugged from the control board to facil
-
itate wiring.
An EcoNet™ communicating system consists of these
matched components:
•
EcoNet™ communicating outdoor unit.
•
EcoNet™ communicating air handler or
EcoNet™ communicating furnace.
•
EcoNet™ Control Center.
