25
4.0 INSTALLATION
4.11 Grounding
WARNING:
The unit must be
permanently grounded. Failure to do so can cause
electrical shock resulting in severe personal injury or
death.
A ground lug is provided near the line-voltage power
entrance for a ground wire.
ST-A1241-01-X0
Wiring
5.0 SYSTEM START-UP AND REFRIGERANT CHARGING
Start-Up
5.1 System Start-Up
Overview
Once the system hardware and wiring has been
properly installed, the next step is to start the
system up, verify indoor air-flow, and adjust the
refrigerant charge. To assure optimum comfort,
efficiency, and reliability, it is extremely important to
follow the procedures in this section to assure the
indoor air-flow and refrigerant charge are correct.
5.2 Initial Power-Up
and EcoNet
™
Communication
Verification
After all installation steps have been completed,
apply electrical power to the indoor and outdoor
units. The EcoNet
TM
Control Center or thermostat
should be switched to the off position initially.
Within 45 seconds of power being applied, the
EcoNet
TM
Control Center should detect the indoor
and outdoor units. A “0” for Standby Mode will be
displayed on the Variable Speed Outdoor Control
(VSODC).
IMPORTANT:
It is recommended
to wait at least 12 hours after electrical power
is applied to the outdoor unit before starting
the compressor to assure any liquid refrigerant
inside the compressor has been driven out by the
compressor stator heat.
5.3 EcoNet
™
Control
Center Set-Up
Follow the set-up instructions included with the
EcoNet
TM
Control Center prior to starting system.
Cooling dehumidification (not applicable for (-) H2T
air-handlers) must be disabled for indoor air-flow
verification and refrigerant charging. The indoor
air-flow trim adjustment (not applicable for (-) H2T
air-handlers) should be set to 0% for indoor air-
flow verification, but should be adjusted prior to
refrigerant charging should the application require
an adjustment to the indoor air-flow.
Ground Lug
