FORM 160.54-O1
ISSUE DATE: 9/10/2014
JOHNSON CONTROLS
134
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
This setpoint allows for either standard or higher tem-
perature condenser temperature operation. It is set at the
factory and requires an ADMIN password to change it.
It is only visible when set to Extended. It is set to Ex-
tended for those chillers equipped for high condenser
temperature operation. Otherwise, it is set to Standard.
When Heat Pump Duty is set to Enabled, this setpoint is
automatically set to Extended. For R134a chillers, refer
to Table 3 on Page 134.
PRV Position
(Software version C.OPT.01.21.307 and later)
Access Level Required: SERVICE
New production chillers after June 2009 can be
equipped with an optional Pre-rotation Vanes Potenti-
ometer, regardless of other options. This setpoint al-
lows the software to be used in all YK chillers, whether
equipped with the potentiometer or not. The PRV po-
sition will be shown on respective screens when En-
abled.
• Enabled – Automatically set to this setting if Hot
Gas Bypass or Variable Geometry Diffuser (VGD)
is enabled on the OPERATIONS Screen or Motor
Drive Type Setpoint is set to VSD or MVVSD.
The actual connection point of the potentiometer
is determined by the equipment conguration:
If equipped with a VSD in YORK protocol con-
guration, itis connected to theACC Board; in
Modbus Protocol Conguration, it is connected
to the Microboard J7. If not equipped with VSD,
but equipped with Hot Gas Bypass, the connec-
tion point is determined by which I/O Board is
present: with I/O Board 371-02514-000, it is con-
nected to this board; otherwise, it is connected to
the Microboard J7. If not equipped with Hot Gas
Bypass but equipped with a VGD, it is connected
to the Microboard J7.
• Disabled – Set to this position when not equipped
with a PRV potentiometer. If equipped with a VSD,
MVVSD or the Hot Gas Bypass, or Variable Ge-
ometry Diffuser is enabled; this setpoint is auto-
matically enabled and cannot be set to disabled.
Motor Monitoring
(Software version C.OPT.01.22.307 and later)
Access Level Required: SERVICE
Allows the Service Technician to enable or disable the
Motor Monitoring feature.
Heat Recovery
(Software version C.OPT.01.21.307 and later)
Access Level Required: SERVICE
Allows the Service Technician to enable or disable the
Heat Recovery feature.
Heat Recovery cannot be used simultaneously with
Heat Pump Duty. When Heat Pump Duty is enabled,
Heat Recovery is automatically disabled and locked.
Head Pressure Control
(Software version C.OPT.01.21.307 and later)
Access Level Required: SERVICE
Allows the Service Technician to enable or disable the
Head Pressure Control feature.
Head Pressure Control cannot be used simultaneously
with Heat Pump Duty. When Heat Pump Duty is en-
abled, Head Pressure Control is automatically disabled
and locked.
Heat Pump Duty
(Software Version C.OPT.01.23.307 and later)
Access Level Required: ADMIN
Allows the Service Technician to enable and disable the
Heat Pump feature. The access level must be ADMIN
and the Refrigerant Type must be set to R-134a (SW1-
1) for the setpoint to appear on this screen. When Heat
Pump Duty is enabled, Heat Recovery and Head Pres-
sure Control are automatically disabled and locked.
TABLE 3 - CONDENSER TEMPERATURE RANGE
STANDARD EXTENDED
Warning – High Pressure Limit – Maximum allowable value (PSIG) 162.5 193
Condenser – High Pressure – Trip/reset threshold (PSIG) 180/120 200/140
Condenser – High Pressure Stopped – Trip/reset threshold (PSIG) 160/160 170/170