25
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 grounding lug is provided near the line-voltage power
entrance for a ground wire as shown in the above
illustration.
Start Up
5.0 SYSTEM START-UP AND REFRIGERANT CHARGING
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 proce
-
dures 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 2-stage Out
-
door Control (TSODC).
If the unit is equipped with a crankcase heater, 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 crankcase
heater.
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 (if applicable) must be
disabled for indoor air-flow verification and refriger
-
ant charging. The indoor air-flow trim adjustment (if
applicable) 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.
5.4 Initial System
Start-Up
Set the EcoNet™ Control Center or 2-stage thermo
-
stat several degrees below the room temperature to
assure the system will operate at 100% capacity (2nd
stage) during indoor air-flow verification and refriger
-
ant charging. Except for applications using an (-)H2T
air-handler, check to make sure “On-Demand Dehu
-
midification” is disabled in the EcoNet™ Control Center
or the humidity setting is set at maximum humidity in
the case of a dehumidifying 24VAC thermostat.
ST-A1226-09
Ground Lug
Summary of Contents for A17 Series
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