JOHNSON CONTROLS
32
FORM 160.54-O1
OptiView Control Center
HEAD PRESSURE CONTROL SCREEN
(Software Version C.OPT.01.21.307)
OVERVIEW
This screen displays all parameters related to the Head
Pressure Control feature. It also allows for setting of the
setpoints applicable to this feature.
If equipped with this optional feature, it must be enabled
on the SETUP Screen. Once enabled, this screen is ac-
cessible from the CONDENSER Screen.
The Condenser water ow animation will show ow
when the Condenser Liquid Flow Switch senses ow
is present.
A complete explanation of the Head Pressure Control
feature is contained in Service Manual 160.54-M1.
Requires login access level of SERVICE.
DISPLAY ONLY
Return Condenser Liquid Temperature
Displays the temperature of the liquid as it enters the
standard condenser tube bundle.
LD14335
FIG. 7B
Leaving Condenser Liquid Temperature
Displays the temperature of the liquid as it leaves the
standard condenser tube bundle.
Delta P
Displays the pressure difference between the condenser
and evaporator (condenser minus evaporator). This is
also called the Head Pressure.
Head Pressure Setpoint
Displays the active Head Pressure Setpoint to which the
head pressure is being controlled.
Control Valve Output
Displays the position command being sent to the control
valve. Displayed over the range of 0.0% to 100%. The
actual value of the output signal for a given error depends
on whether the PID OUTPUT setpoint is set to DIRECT
or REVERSE. If set to DIRECT, the 0.0% output will
be at minimum; the 100% output will be at maximum. If
set to REVERSE, the 0.0% output will be at maximum;
the 100% output will be at minimum.
Control Valve Control Mode
Displays whether the Control valve is in automatic or
manual control.
To Next Page
Loading...
