Head Pressure Control Screen; Figure 11 - Head Pressure Control Screen - York YK Style H Operation Manual

FORM 160.76-O2
issue date: 6/15/2015

FIGURE 11 - HEAD PRESSURE CONTROL SCREEN

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 en-
abled on the SETUP Screen. Once enabled, this screen
is accessible from the CONDENSER Screen.
Head Pressure Control cannot be used simultaneously
with Heat Pump Duty. When Heat Pump Duty is en-
abled, Head Pressure Control is automatically disabled
and locked.
The condenser water flow animation will show flow
when the Condenser Liquid Flow Switch senses flow
is present.
A complete explanation of the Head Pressure Con-
trol feature is contained in OptiView Control Center –
Service Instructions (Form 160.76-M1).
Requires a login access level of SERVICE.
Service Technicians refer to the OptiView
Control Center - Service Instructions
(Form 160.76-M1) for operation instruc-
tions and explanation of all programmable
setpoints and displayed values.
JOHNSON CONTROLS

HEAD PRESSURE CONTROL SCREEN

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
DISPLAY ONLY
Entering Condenser Liquid Temperature
Displays the temperature of the liquid as it enters the
standard condenser tube bundle.
Leaving Condenser Liquid Temperature
Displays the temperature of the liquid as it leaves the
standard condenser tube bundle.
Head Pressure
Displays the pressure difference between the condens-
er 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 Command
Displays the position command being sent to the Con-
trol 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
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