York YST Operation Manual page 100

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
If the Steam Flow Transmitter produces an output
which is linear with the differential pressure drop
across a flow sensing element, this must be set to
Square Root. The logic will then extract the square root
of the input signal to provide a display that is linear
with the steam flow.
fSp2 – evaporator flow Transmitter Signal
Type
Screen: Evaporator
Range: Linear/Square Root
If the Evaporator Flow Transmitter produces an out-
put which is linear with the differential pressure drop
across a flow sensing element, this must be set to
Square Root. The logic will then extract the square root
of the input signal to provide a display that is linear
with the chilled liquid flow.
fSp2 – Condenser flow Transmitter Signal
Type
Screen: Condenser
Range: Linear/Square Root
If the Condenser Flow Transmitter produces an out-
put which is linear with the differential pressure drop
across a flow sensing element, this must be set to
Square Root. The logic will then extract the square root
of the input signal to provide a display that is linear
with the cooling liquid flow.
Change Setpoints
Access Level Required: SERVICE
This key enables the field selection cursor. The opera-
tor may then toggle between the programmable data
fields using the Cursor Arrow keys.
navigaTion
page up
Access Level Required: VIEW
Causes an instant return to Configuration Screen 1.
page down
Access Level Required: VIEW
Moves to the Configuration Screen 3.
100
Default: Linear
Default: Linear
home
Access Level Required: VIEW
Causes an instant return to the Home Screen.
Setpoints
Access Level Required: VIEW
Causes an instant return to the Setpoints Screen.
pressure Setpoints
Access Level Required: VIEW
Moves to a sub-screen that allows programming of
various pressure thresholds pertaining to the operation
of the chiller.
Time Setpoints
Access Level Required: VIEW
Moves to a sub-screen that allows programming of
various time delays pertaining to the operation of the
chiller.
Speed Setpoints
Access Level Required: VIEW
Moves to a sub-screen that allows programming of
various speed thresholds pertaining to the operation of
the chiller.
ramp rate Setpoints
Access Level Required: VIEW
Moves to a sub-screen that allows programming of
various speed setpoint and valve control signal ramp
rates pertaining to the operation of the chiller
FORM 160.67-O1
ISSUE DATE: 4/1/2015
JOHNSON CONTROLS