Johnson Controls YORK OPTIVIEW CONTROL CENTER, Operation Manual

Page: 26 / 142

JOHNSON CONTROLS
26
FORM 160.10-O1
ISSUE DATE: 4/27/2018
SECTION 2 - OPTIVIEW OPERATION
Liquid Bypass Control (Enabled/ Disabled)
Access Level Required: SERVICE
The liquid bypass control must be enabled when liquid
bypass valve is installed on the Trane chiller. When
enabled, it will display the programmable values and
manual valve control button for the liquid bypass valve.
Liquid Bypass Manual Control
Access Level Required: SERVICE
When enabled this will display the liquid bypass valve
open and close buttons on the Evaporator screen. This
will allow the user to manually open and close the liq-
uid bypass valve.
Evaporator Approach Setpoint
Access Level Required: SERVICE
This is the setpoint entered by the startup technician
used to control the liquid bypass valve during the times
when low condenser water temperatures can cause the
evaporator to starve.
Evaporator Approach Deadband Setpoint
Access Level Required: SERVICE
This is the setpoint entered by the startup technician
used to provide a deadband between the open and close
of the valve. This is used to prevent the valve from
hunting.
Open Pulse Time
Access Level Required: SERVICE
This setpoint determines the length of open pulse time.
Example: 1 Sec= means each open pulse will last for
1 Second.
Open Pulse Delay Time
Access Level Required: SERVICE
This setpoint determines the length of wait time be-
tween open pulses of the liquid bypass valve.
Close Pulse Time
Access Level Required: SERVICE
This setpoint determines the length of close pulse time
of the liquid bypass valve. Example: 1 Sec= means
each close pulse will last for 1 Second.
Close Pulse Delay Time
Access Level Required: SERVICE
This setpoint determines the length of wait time be-
tween close pulses.
Discharge Superheat Setpoint
Access Level Required: SERVICE
This setpoint is used in the calculation to control the
discharge superheat on the machine.
NAVIGATION
Home
Access Level Required: VIEW
Returns the display to the Home screen.
Evaporator
Access Level Required: VIEW
Returns the display to the Evaporator screen.