York R-407C Optimized, Manual, Page: 7 / 120

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YORK INTERNATIONAL
7
YORK INTERNATIONAL
FORM 201.19-EG4
v
High discharge pressure unload setpoint.
v
Fan control discharge pressure setpoint.
v
Fan ON/OFF pressure differential.
v
Compressor motor current percent limit.
• The Standard unit controls permit operation down
to 0°F (-18°C) outdoor ambient temperature.
POWER PANEL:
• Power panel housed in NEMA 3R/12 (IP55) rain/dust
tight, powder painted steel cabinets with hinged,
latched, and gasket sealed outer doors equipped
with wind struts for safer servicing. Two motor control
center cabinets are provided, with independent doors
and separated by a steel panel.
• Current transformers sense each phase, as an input
to the microprocessor, to protect compressor motors
from damage due to: low input current, high input
current, unbalanced current, single phasing, phase
reversal, and compressor locked rotor.
• Control circuit transformer provides 115V/1 ∅ power to
the unit control system. Includes factory primary wiring
via lockable disconnect on panel door separate from
the motor control centers, and secondary wiring supply
to the 24V, fused Microprocessor panel transformer
via the panel mounted stop switch.
• Individual fan motor contactors and external overloads
per condenser fan motor.
• Exposed compressor and fan motor power wiring
routed through liquid tight conduit.