York YLPA 0115SE, Installation, Operation And Maintenance Manual

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51
JOHNSON CONTROLS
FORM 150.68-ICOM1
ISSUE DATE: 10/15/2020
OPTIONAL PRINTER INSTALLATION
The microprocessor is capable of supplying a printout
of unit conditions or fault shutdown information at
any given time. In addition, to the manually selected
printouts the microprocessor will provide an automatic
printout whenever a fault occurs. An explanation of the
print function is given under the Display/Print Keys
Section. If the RS232 (TB3) printer port does not work
check the following. Press PROGRAM, DOWN arrow,
DOWN arrow, DOWN arrow, DOWN arrow, ENTER
keys in turn. Then repeatedly press the ENTER key
and check the following settings: P2 PROTOCOL API,
P2 BAUD RATE 1200, P2 PARITY NONE, P2 HW
SELECT BIT RS-232. If necessary use the DOWN
ARROW key to set the correct value, then press the
ENTER key. Power down then power-up the unit
The Printer option is not available if the
Modbus feature is being used.
Obtaining a Printout
A printout can be obtained by pressing the PRINT key
on the keypad and then pressing either the OPER DATA
key or HISTORY key.
BAS/EMS TEMPERATURE RESET
BAS/EMS Temperature Reset Using a Voltage or
Current Signal
If the EMS-PWM feature has been activated, no message
REMOTE TEMP RESET INPUT is visible under the
OPTION key the following feature is disabled. Contact
Johnson Controls York Product service if you require
the following feature.
The chilled liquid and hot liquid setpoints can be reset
using a single remote 0 - 10VDC or 2-10VDC or
0-20ma or a 4-20mA signal connected to terminal block
-XTBC1 terminals A- and A+. The corresponding type
of signal must be set under the OPTION key. Once an
input change is registered the input signal is not read
again for 5 minutes.
If enabled this feature will work even when the Option
Local/Remote mode is set to Local. This input is
not available if a remote communications device is
connected, Option Local/Remote is set to remote and the
remote communications device is not releasing control
to the panel.
Cooling Mode
In the cooling mode the chilled liquid setpoint can be
reset upwards from the manually entered setpoint by
using a remote 0 - 10VDC or 2-10VDC or 0-20ma or
a 4-20mA signal connected to terminal block -XTBC1
terminals A- and A+. This is the same signal as used to
reset the heating setpoint in the heating mode. Whenever
a reset is called for by the remote signal, the change may
be viewed by pressing the Setpoints key three times. The
new value will be displayed as REM C SP = XXX °C.
0-10VDC Remote Signal
Jumper JP on the I/O board must be set to 10V.
To calculate the reset chilled liquid setpoint for values
between 0VDC and 10VDC use the following formula:
Setpoint = Local Chilled Liquid Se °Reset
°Reset = ((DC voltage signal) x (*Max Reset Value))/10
Example:
Local Chilled Liquid Setpoint = 43.5 °F
*Max Reset Value = 18 °F
Input Signal = 6VDC
°Reset = (6VDC x 18. 0 °F)/10 = 10.8 °F
New Setpoint = 43.5 °F + 10.8 °F = 54.3 °F
2-10VDC Remote Signal
Jumper JP on the I/O board must be set to 10V.
To calculate the reset chilled liquid setpoint for values
between 2VDC and 10VDC use the following formula:
Setpoint = Local Chilled Liquid Se °Reset
°Reset = ((DC voltage signal - 2) x (*Max Reset
Value))/8
Example:
Local Chilled Liquid Setpoint = 43.5 °F
*Max Reset Value = 18 °F
Input Signal = 6VDC
°Reset = ((6VDC - 2) x 18 °F)/8 = 9 °F
New Setpoint = 43.5 °F + 9 °F = 52.5 °F