Johnson Controls YORK OPTIVIEW CONTROL CENTER, Operation Manual

Page: 42 / 142

JOHNSON CONTROLS
42
FORM 160.10-O1
ISSUE DATE: 4/27/2018
SECTION 2 - OPTIVIEW OPERATION
If this setpoint is enabled and the extended run setpoint
is enabled, a safety shutdown is performed if the surge
window count exceeds the count limit setpoint at the
completion of the ten (10) minute extended run period.
“SURGE PROTECTION – EXCESS SURGE” is dis-
played with either shutdown.
If this setpoint is disabled, refer to operation under
“Count Limit”.
Extended Run (Enabled/Disabled)
Access Level Required: OPERATOR
Allows the user to select the surge correction/avoid-
ance extended run mode. This will be implemented
when an excess surge situation is detected as follows:
Anytime the surge window count exceeds the count
limit, the pre-rotation vanes are driven closed for the
next ten (10) minutes. While this load inhibit is in ef-
fect, “WARNING – SURGE PROTECTION – EX-
CESS SURGE LIMIT’ is displayed. When ten (10)
minutes have elapsed, the warning message and load
inhibit are automatically cleared, provided the surge
window count is less than or equal to the count limit.
If the shutdown setpoint is enabled and the surge win-
dow count exceeds the count limit after the ten minutes
elapse, a safety shutdown is performed and “SURGE
PROTECTION – EXCESS SURGE” is displayed.
There are several exceptions related to VSD and/or hot
gas bypass equipped chillers for extended run to oper-
ate. See the exceptions listed under “Shutdown”.
Surge Sensitivity
Access Level Required: SERVICE
Allows the user to define the sensitivity of the surge
detection. Selectable over the range of 0.3 to 1.3; de-
fault is 0.3. The smaller the number, the greater the
sensitivity.
Clear Surge Count
Access Level Required: ADMIN
Allows user to set the “Total Surge Count” display to
zero.
NAVIGATION
Home
Access Level Required: VIEW
Returns the display to the Home screen
Compressor
Access Level Required: VIEW
Returns the display to the Compressor screen.