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76 RTAC-SVX01F-EN
Installation - Electrical
115 volt field-provided connections (either control or power) are made through
knockouts on the lower left side of the panel (
Figure 31). Additional grounds may be
required for each 115 volt power supply to the unit. Green lugs are provided for 115V
customer wiring.
Control Power Supply
The unit is equipped with a control power transformer; it is not necessary to provide
additional control power voltage to the unit.
All units are factory-connected for appropriate labeled voltages except for the 400V/
50Hz units which need the control power transformer (1T1) reconnected as noted
below.
NOTE: Important! As shipped, a normal 400 volt unit control power transformer is
wired on the 400 volt tap (H3). Reconnect the appropriate transformer wire lead 126A
to the tap (H2) for 380V/50Hz power supply or lead 126A to the tap H4 for the 415V/
50 Hz power supply. It is also necessary to adjust the “unit voltage” setting using
TechView (Configuration-Custom Tab).
Heater Power Supply and Convenience Outlet (Packaged Units Only)
The evaporator shell is insulated from ambient air and protected from freezing
temperatures by two thermostatically-controlled immersion heaters and two strip
heaters. Whenever the water temperature drops to approximately 37°F (2.8°C), the
thermostat energizes the heaters. The heaters will provide protection from ambient
temperatures down to -20°F (-29°C).
It is required to provide an independent power source (115V 60Hz-20 amp, 220V
50Hz-15 amp), with a fused-disconnect. The heaters are factory-wired back to the unit
control panel.
Figure 31 Starter Panel
Knockouts for 30 volt
115 volt
field wiring
Cut holes for power
wiring THIS AREA