AAON RQ SERIES, Руководство пользователя

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Variable Speed Compressor Temperature Control
WattMaster VCC-X Unit Controller and
WattMaster Refrigerant System Module for
Copeland VFD Compressors (RSMVC-P)
work together to control the unit operation
and control the variable speed compressor
capacity.
The RSMVC-P Module provides the
following:
• Controls the Compressors to satisfy the
Supply Air
Temperature Setpoint (Supply Air
Temperature sent by VCCX-P Controller)
during Cooling Mode. During
Dehumidification Mode, it controls the
Compressors to the Suction (Saturation)
Temperature Setpoint
• Communicates to the Copeland VFD Drive
for control and fault monitoring
• Modulates the Condenser Fan to maintain
the Head Pressure Setpoint
• Provides alarms and safeties for the
compressor and condenser operation.
• Contains a 2 x 8 LCD character display
and 4 buttons that allow for status display,
setpoint changes, and configuration changes.
Cooling Mode Operation
In the Cooling Mode, as the Supply Air
Temperature (SAT) rises above the Active
SAT Cooling Setpoint, the compressors will
stage on and modulate to maintain the
Active SAT Cooling Setpoint. Minimum off
times must also be met before compressors
can stage on and minimum run times must
be met before compressors can stage off.
Figure 6 - WattMaster VCC-X Controller and
Refrigeration System Control Module
For more information about the VCC-X Controller or
RSMVC-P Controller reference the VCC-X Controller
Technical Guide (V57140) and the RSMVC-P Technical
Guide (V73400).