FORM 160.54-O1
ISSUE DATE: 9/10/2014
JOHNSON CONTROLS
66
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
minute is added, thus providing a rolling count of the
total surge events that have occurred in the last Count
Window minutes. This value is reset when the chiller
shuts down.
Surge Window Count
Displays the number of surge events that have occurred
in the last 1 to 5 minutes as programmed with the Count
Window Setpoint. If the chiller has been running for
less than the Count Window minutes, it is the number
of surge events that have occurred within the last num-
ber of minutes displayed as the Surge Window Time.
The count is cleared when the chiller shuts down.
Surge Avoidance Surge Detected (LED)
Illuminates momentarily when a surge is detected by
the Surge Protection feature. If equipped with a VSD
or MV VSD these are only the surges detected while
the drive is running at maximum frequency.
If equipped with software version C.OPT.01.18.307
or earlier, this is displayed as Surge Detected. It illu-
minates momentarily when a surge is detected by the
Surge Protection feature. If equipped with a VSD, it
illuminates whenever a surge is detected, regardless of
the VSD operating speed.
ACC Surge Detected (LED)
[Software version C.OPT.01.19.307 and later only.
Only displayed if equipped with a VSD (in Modbus
Protocol Configuration only) 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.
Surge Avoidance Surge Count
(Displayed as Total Surge Count in software version
C.OPT.01.15.307 and earlier)
This is the total number of surges accumulated by the
Surge Protection feature. If equipped with a VSD or
MV VSD, it is only the surges detected while the drive
is running at maximum frequency.
Extended Run Time Remaining
Displays the time remaining in the 10-minute Extended
Run period. During this period, the Pre-rotation Vanes
are driven closed and WARNING – SURGE PROTEC-
TION – EXCESS SURGE LIMIT is displayed. Refer
For fields requiring access level of SER
-
VICE. Service Technicians refer to the
OptiView Control Center - Service Instruc
-
tions (Form 160.54-M1) for operation
instructions and explanation of all pro-
grammable setpoints and displayed values.
PROGRAMMABLE
Shutdown (Enabled/Disabled)
Access Level Required: OPERATOR
Allows the user to select whether the chiller will shut-
down or continue to run when an Excess Surge situa-
tion has been detected.
If this setpoint is Enabled and the Extended Run
Setpoint is Disabled, a safety shutdown is performed
when the Surge Window Count exceeds the Count
Limit Setpoint.
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 10 minute Extended
Run period.
Surge Protection – Excess Surge is displayed with ei-
ther shutdown.
If this setpoint is Disabled, refer to operation under
With software version C.MLM.01.09.xxx (and later)
or C.OPT.01.09.301 (and later):
•
If equipped with a compressor Variable Speed
Drive (VSD), the VSD output frequency must
be at maximum before the Shutdown feature is
implemented or Surge Warning messages are dis-
played.
•
If equipped with a VSD and Hot Gas Bypass
(Enabled), the VSD output frequency must be at
maximum and the Hot Gas Valve must be at 100%
before the Shutdown feature is implemented or
Surge warning messages are displayed.
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
