JOHNSON CONTROLS
44
FORM 160.78-O2
ISSUE DATE: 5/22/2017
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
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 a safety shutdown is per-
formed when the SURGE WINDOW COUNT exceeds
the COUNT LIMIT setpoint.
"SURGE PROTECTION – EXCESS SURGE" is dis-
played with shutdown.
Count Window
Access Level Required: OPERATOR
Allows the user to define the period of time (1 to 5
minutes; default 5; default 3 in which the number of
surge events (SURGE WINDOW COUNT) are com-
pared to the maximum allowed (COUNT LIMIT), for
the purpose of detecting an excess surge situation.
Count Limit
Access Level Required: OPERATOR
Allows the user to define the maximum number of surge
events (4 to 20; default 4; default 15 that can occur
within a defined period of time before an Excess Surge
situation is detected. If the SURGE WINDOW COUNT
exceeds the COUNT LIMIT, an Excess Surge situation
has occurred.
When an Excess Surge situation is detected, and the
SHUTDOWN setpoint is Enabled, the chiller will per-
form a safety shutdown and display "SURGE PRO-
TECTION – EXCESS SURGE".
Surge Sensitivity
Access Level Required: SERVICE
Allows the user to define the surge detection sensitiv-
ity of the Surge Protection feature. Selectable over the
range of 0.3 to 1.3; default 0.3. The smaller the num-
ber, the greater the sensitivity.
Clear Surge Count
Access Level Required: ADMIN
Allows user to set the Total Surge Count to zero.
NAVIGATION
Home
Causes an instant return to the Home Screen.
Compressor
Causes an instant return to the Compressor Screen.
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