86
FORM 160.54-M1
ISSUE DATE: 10/25/2019
SECTION 5 - MICROBOARD 031-03630-001
JCI COMPANY CONFIDENTIAL
JOHNSON CONTROLS
Condenser Temperature Range –
Special order chill-
ers that operate at higher than standard condenser
temperatures require higher condenser high pressure
warning and safety thresholds. This setpoint allows the
software to be used in either standard or high tempera-
ture applications. This setpoint is set at the factory at
time of manufacture and requires an ADMIN password
to change it. It is only visible when set to Extended.
The selections are:
1.
Standard –
Uses standard high pressure warning
and safety shutdown thresholds as follows:
• “Warning – High Pressure Limit” – Maxi-
mum allowable value is 162.5 psig
• “Condenser – High Pressure” – Trip/reset
threshold is 180/120 psig
• “Condenser – High Pressure – Stopped” –
Trip/reset threshold 160 psig.
2.
Extended –
Uses higher high pressure warning
and safety shutdown thresholds as follows:
• Warning – High Pressure Limit” – Maximum
allowable value is 193.0 psig
• “Condenser – High Pressure” – Trip/reset
threshold is 200/140 psig
• “Condenser – High Pressure – Stopped” –
Trip/reset threshold is 170 psig
PRV Position
New production chillers after June
2009 can be equipped with an optional Pre-rotation
Vanes potentiometer, regardless of other options. This
setpoint allows the software to be used in all YK chill-
ers, whether equipped with the potentiometer or not.
The PRV position will be shown on respective screens
when Enabled; not shown when Disabled.
1.
Enabled –
Automatically set to this setting if Hot
gas bypass or Variable Geometry Diffuser (VGD)
is enabled on the OPERATIONS Screen or Mo-
tor Drive Type setpoint is set to VSD or MVVSD.
The actual connection point of the potentiometer
is determined by the equipment configuration:
• If equipped with a VSD in YORK Protocol
configuration, it is connected to the ACC
Board.
• In Modbus Protocol configuration, it is con-
nected to the microboard J7.
If not equipped with a VSD, but equipped with
Hot gas bypass, the connection point is deter-
mined by which I/O Board is present. With I/O
Board 371-02514-000 or 031-02895-000, it is
connected 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.
2.
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
Geometry Diffuser is enabled, this setpoint is au-
tomatically enabled and cannot be set to disabled.
• Motor Monitoring
The Motor Monitoring feature to be enabled
or disabled. Motor Monitoring can not be
used with the 371-02514-000 since the Mo-
tor Monitoring and the Frick Analog board
use differnt protocols.
• Heat Recovery
Allows the Heat Recovery feature to be en-
abled or disabled.
• Head Pressure Control
Allows the Head Pressure feature to be en-
abled or disabled.
• Heat Pump Duty
Allows the Heat Pump Duty to be enabled or
disabled.
Microboard Service Replacement
If the microboard is replaced within the warranty pe-
riod, the defective board must be returned to YORK
per the warranty return procedure. Use the return in-
structions and return address label provided with the
replacement board.
To order a replacement Microboard for a YK Chiller,
order part number 331-03630-601. This part number
provides an 031-03630-001 Microboard and SD card
that have been programmed with the latest version of
the YK “Controls” software. The Program must be
loaded in the field by the service technician. Refer
to
Renewal Parts – OptiView Control Center (Form
160.54-RP1)
.
The microboard is shipped with a label on the outside
of the shipping box that lists the part number of the pre-
programmed Microboard (331-03630-601), the basic
Microboard part number (031-03630-001) and the ver-
sion of the pre-programmed “Controls” software (for
example, Y.OPT.01.01.308).