York YK Style H Operation Manual page 64

With optiview control center centrifugal liquid chillers, for electro-mechanical starter, solid state starter and variable speed drive
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SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
ACC Surge Detected (LED)
Only displayed if equipped with a VSD or MV VSD].
Illuminates momentarily when a surge is detected by
the ACC function in the Microboard, while the drive is
running at less than maximum frequency.
For fields requiring access level of SER-
VICE. Service Technicians refer to the
OptiView Control Center - Service Instruc-
tions (Form 160.76-M1) for operation
instructions and explanation of all pro-
grammable setpoints and displayed values.
PROGRAMMABLE
Close Percentage
(5 to 15%)
This is the incremental amount that the Hot Gas Valve
will be closed at 10 minute intervals after the HOLD
period has elapsed.
Hold Period
(30 to 120 minutes)
This is the period of time after no more surges are de-
tected that the Hot Gas Valve closing will begin.
Minimum Load
(0 to 4°F)
This sets the offset below the Leaving Chilled Liquid
Temperature Setpoint at which the Hot Gas Valve will be
opened to the position allowed by the Maximum Open
64
Setpoint.
Maximum Open
(25 to 100%)
The maximum allowed position for the Hot Gas Valve
during a Minimum load override condition.
NAVIGATION
Home
Access Level Required: VIEW
Returns user to HOME Screen.
Capacity Control
Access Level Required: VIEW
Returns user to Capacity Control Screen.
FORM 160.76-O2
issue date: 6/15/2015
JOHNsON CONtROLs

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