Program Switches - York YK-EP B Operation & Maintenance Manual

SECTION 5 - SERVICE
JP22* – Shunt must be removed or hang on one pin
Pins 1-2: Not used.
Pins 2-3: Not used.
JP23* – Remote Current Limit setpoint (J22) type.
Configures Analog Input for 0 to 10VDC, 2 to
10VDC, 0 to 20mA or 4 to 20mA.
OUT: Allows 0 to 10VDC or 2 to 10VDC
input on J22-1.
Pins 1-2: Allows a 0 to 20mA or 4 to 20mA
input on J22-2.
Pins 2-3: Not used.
JP24* – Remote Leaving Chilled Liquid Temperature
setpoint (J22) type. Configures Analog Input
for 0 to 10VDC, 2 to 10VDC, 0 to 20mA or 4
to 20mA.
OUT: Allows 0 to 10VDC or 2 to 10VDC
input on J22-3.
Pins 1-2: Allows a 0 to 20mA or 4 to 20mA
input on J22-4.
Pins 2-3: Not used.
JP25* – DC Undervoltage signal for Proximity Probe.
Pins 1-2: Correct position for YKEP
Pins 2-3: Not Used
JP26 – Applies a pull-down voltage to COM6 RS-
485 - termnal.
Pins 1-2: Not used.
Pins 2-3: Normal position - no bias applied.
JP27 – Applies a pull-down voltage to the COM5B -
terminal.
IN: Not used.
OUT: Normal position - no bias applied.
JP28 – Applies a 120 Ohm terminating resistor across
the COM5B RS-485 port.
IN: Not Used.
OUT: Normal position - no bias applied.
JP29 – Applies a pull-up voltage to the COM5B +
terminal.
IN: Not used.
OUT: Normal position - no bias applied.
206

PROGRAM SWITCHES

SW1-1* – Refrigerant Selection. Must be set ac-
cording to the refrigerant type installed in the
chiller.
ON – R-134a
OFF – R22
SW1-2* – Liquid Type. Must be set according to
whether the chiller is cooling water or brine
solution.
ON – Brine.
OFF – Water.
SW1-3* – Diagnostics. Enables or Disables the soft-
ware diagnostics.
ON – Enables diagnostics. Disables normal
chiller operation.
OFF – Disables diagnostics. Enables normal
chiller operation.
SW1-4 – Boot from SD Card/Flash (This performs
the same function as the JP6 jumper on the
02430 board.
ON – Enables boot from SD card to load a
new program.
OFF – Boot the program stored in memory.
FORM 160.87-OM1
ISSUE DATE: 8/24/2018
JOHNSON CONTROLS