Section 11 • Condenser Control Overview; Condenser Control Setpoint - Emerson Vilter Vission 20/20 Operation And Service Manual

Section 11 • Condenser Control
Overview
This screen allows the operator to view and adjust con-
denser setpoint settings associated with condenser op-
eration. This screen will only be active if the Condenser
Control option has been enabled from the Configuration
Screen, page 2. When Condenser Control is running, a
status icon will appear on the bottom left corner of the
main screen to make the user aware of it.
The Condenser Control operation allows the cycling of
fans and pumps in order to maintain a specific condens-
ing pressure. The five different steps in step control al-
low selection of fans, pumps and VFD in one or more
steps. When a VFD is employed, VFD is allowed to reach
maximum speed, if additional capacity is needed, the
next fan or pump is turned on. The VFD will modulate
down and then once it is back up to 100% again, then
the next fan or pump is turned on. This method allows
the smoothest condenser control by spacing the VFD
between the fan and pump steps, while maintaining a
condenser pressure that matches the setpoint.
Vission 20/20 • Operation and Service Manual • Emerson • 35391SC 2.7
Figure 11-1. Condenser Control Screen - Page 1

Condenser Control Setpoint:

Run Mode:
• Run Mode allows the selection of different modes of
operation for condenser control. The choices for se-
lection are:
Run Never
• The mode of operation by default. Condenser Control
operation will not be performed when this mode is
active.
Run With Comp
• Automatic operation of condenser control selected
when control of the condenser is required to only run
when the compressor is running.
Run Always
• Automatic operation of condenser control selected
when control of the condenser is required to run even
when the compressor is off.
11 – 1