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SECTION 3 - MICROBOARD 031-01730-000
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS JCI COMPANY CONFIDENTIAL
3
JP24 - Remote Leaving Chilled Liquid Temp setpoint
(J22)type.ConguresAnalogInputfor0to10
VDC, 2 to 10 VDC, 0-20mA or 4 to 20mA.
OUT: Allows a 0 to 10 VDC or 2 to 10 VDC
input on J22-3.
Pins 1-2: Allows a 0 to 20mA or input on J22-4.
Pins 2-3: Not Used.
JP25, JP26 - Not Used.
JP27 -COM4serialcommunicationsport.Congures
COM 4 port to be either RS-485 for Multi-Unit
Communications (COM 4A) or RS-232 for
GPIC board (COM4B).
Pins 1-2: Enables port 4A. Allows an RS-485
connection to Microboard J11 for Multi-Unit
Communications.
Pins 2-3: Enables port 4B. Allows an RS-232
connection to Microboard J2 for E-Link Gate-
way communications.
JP28 - PC-104 Port interrupt assignment. Assigns se-
lected PC-104 interrupt request to PIRQ7 on
the microprocessor. Interrupt request selections
are silk screened on the microboard adjacent to
the program jumper. Not used on YK chiller ap-
plications.
JP29 - PC-104 Port interrupt assignment. Assigns se-
lected PC-104 interrupt request to PIRQ6 on the
microprocessor. Interrupt request selections are
silk screened on the microboard adjacent to the
program jumper. Future modem application.
JP30 - PC-104 Port DMA assignment. Assigns se-
lected PC-104 DMA request to PIRQ0 on the
microprocessor. DMA request selections are
silk screened on the microboard adjacent to the
program jumper. Not used on YK Chiller ap-
plications.
JP31 - PC-104 Port DMA assignment. Assigns se-
lected PC-104 DMA request to PIRQ1 on the
microprocessor. DMA request selections are
silk screened on the microboard adjacent to the
program jumper. Not used on YK Chiller ap-
plications.
JP32 - PC-104 Port DMA acknowledge assignment.
Assigns selected PC-104 DMA acknowledge
to PDACK0 on the microprocessor. DMA ac-
knowledge selections are silk screened on the
microboard adjacent to the program jumper.
Not used on YK Chiller applications.
JP33 - PC-104 Port DMA acknowledge assignment.
Assigns selected PC-104 DMA acknowledge
to PDACK1 on the microprocessor. DMA ac-
knowledge selections are silk screened on the
microboard adjacent to the program jumper.
Not used on YK Chiller applications.
JP34 - Refrigerant type. Jumper must be positioned
according to the refrigerant type installed in the
chiller.
IN: R22
OUT: R-134a.
JP35 - Water/Brine application. Jumper must be posi-
tioned according to whether the chiller is cool-
ing water or a brine solution.
IN: Water. Leaving Chilled Liquid Tempera-
ture setpoint range 38°F (36°F if Smart Freeze
is enabled) to 70°F.
OUT: Brine. Leaving Chilled Liquid Tempera-
ture setpoint range 10°F to 70°F.
JP36 - Steam Turbine or Electric Motor drive - Deter-
mines the “Coastdown” duration (Oil Pump run
duration after shutdown) and whether the “Mo-
tor Controller-Loss of Current” Program check
is performed while the chiller is running.
IN: 150 seconds. Electric motor drive applica-
tions.
OUT: 15 minutes. Steam Turbine applications.
MOTOR CONTROLLER-LOSS OF CUR-
RENT check is not performed.
JP37 - Compressor Motor starter type.
IN: Electromechanical or Solid State Starter.
OUT: Variable Speed Drive Program Jumper
JP39 must be IN for this application.
JP38 - BIOS EPROM U45 size. Jumper must be posi-
tioned according to size of U45. Jumper is a 10
Ohm resistor that is soldered to board. It is not
a shunt jumper.
IN: 256K
OUT: 64K or 128K. Should be OUT for YK
chiller applications.
JP39 - Solid State Starter style.
Note: On Variable speed Drive applications,
this jumper must be IN.
IN: Mod A - Old style with Logic Board mount-
ed in OptiView Control Center.
OUT: Mod B - New style with integrated Log-
ic/Trigger Board mounted Starter cabinet.
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