![background image](http://html1.mh-extra.com/html/york/ylpa-0115se/ylpa-0115se_installation-operation-and-maintenance-manual_913548054.webp)
54
JOHNSON CONTROLS
FORM 150.68-ICOM1
ISSUE DATE: 10/15/2020
EMS-PWM Heating Temperature Reset
Pressing the SETPOINTS a sixth time will allow the
maximum remote EMS-PWM heating temperature reset
to be programmed:
MAX EMS-PWM REM H
TEMP RESET = +XX °F
The temperature reset value is the maximum allowable
reset of the heating temperature SETPOINT. The
SETPOINT can be reset downwards by the use of a
timed contact closure on the PWM input (-XTBC1
terminals 13 - 20). Activated on request.
Pressing the UP arrow or DOWN arrow will change
the temperature reset value in 1.0°C increments. The
ENTER/ADV key must be pressed to enter the value
into memory.
LAST RUN TIME =XXX S
SETP ADJUST= XX.X °F
Pressing the SETPOINTS a seventh time will display
the lead systems last run time and the setpoint adjust
value. See Capacity Control Section.
EMS-PWM Remote Temperature Reset
The EMS-PWM remote temperature reset value at
terminals 13 - 20 on –XTBC1, will reset the cooling or
heating liquid SETPOINT based on the length of time
the contacts remain closed. The maximum temperature
reset allowed is achieved with a contact closure of 11
seconds. One second is the shortest time allowed and
causes the liquid SETPOINT to revert back to the local
programmed value.
In the cooling mode the reset value is always added
to the cooling liquid SETPOINT, meaning that this
function never lowers the cooling liquid SETPOINT
below the locally programmed value, it can only reset
to a higher value.
In the heating mode the reset value is always subtracted
from the heating liquid SETPOINT, meaning that this
function never raises the heating liquid SETPOINT
above the locally programmed value, it can only reset
to a lower value.
The microprocessor board must be refreshed between 30
seconds and 30 minutes. Any contact closure occurring
sooner than 30 seconds will be ignored. If more than
30 minutes elapse before the next contact closure, the
setpoint will revert back to the locally programmed
value.
The new chilled liquid SETPOINT is calculated:
Cooling Mode
Setpoint = Local Chilled Liquid Se °Reset
°Reset = ((Contact Closure - 1) x (*Max. Reset
Value))/10
Example:
Local Chilled Liquid Setpoint = 43.5 °F
*Max Reset Value = 18 °F
Input Signal = 6VDC
Contact Closure Time = 6 seconds.
°Reset = (6 sec - 1) * 18 °F/10 = 9.0°F
New Setpoint = 43.5 °F + 9.0°F = 42.5°F
Heating Mode
Setpoint = Local Hot Liquid Setpoint - °Reset
°Reset = ((Contact Closure - 1) x (*Max. Reset
Value))/10
Example:
Local Hot Liquid Setpoint = 122 °F
*Max Reset Value = 9.0 °F
Contact Closure Time = 4 Seconds
°Reset = (4 sec - 1) * 9.0 °F/10 = 2.7°F
New Setpoint = 122 °F - 2.7°F = 119.3 °F
The SETPOINTS key should be pressed three times
to view the remote cooling SETPOINT and RANGE:
REM C SP = XX.X °F
RANGE = +/- X.X °F
The SETPOINTS key should be pressed four times to
view the remote heating SETPOINT and RANGE:
REM H SP = XXX.X °F
RANGE = +/- X.X °F
Summary of Contents for YLPA 0115SE
Page 4: ...4 JOHNSON CONTROLS FORM 150 68 ICOM1 ISSUE DATE 10 15 2020 Page Left Intentionally Blank ...
Page 10: ...10 JOHNSON CONTROLS FORM 150 68 ICOM1 ISSUE DATE 10 15 2020 Page Left Intentionally Blank ...
Page 16: ...16 JOHNSON CONTROLS FORM 150 68 ICOM1 ISSUE DATE 10 15 2020 Page Left Intentionally Blank ...
Page 26: ...26 JOHNSON CONTROLS FORM 150 68 ICOM1 ISSUE DATE 10 15 2020 Page Left Intentionally Blank ...
Page 30: ...30 JOHNSON CONTROLS FORM 150 68 ICOM1 ISSUE DATE 10 15 2020 Page Left Intentionally Blank ...
Page 72: ...72 JOHNSON CONTROLS FORM 150 68 ICOM1 ISSUE DATE 10 15 2020 Page Left Intentionally Blank ...
Page 79: ...79 JOHNSON CONTROLS FORM 150 68 ICOM1 ISSUE DATE 10 15 2020 YLPA P I Diagram ...
Page 86: ...86 JOHNSON CONTROLS FORM 150 68 ICOM1 ISSUE DATE 10 15 2020 Page Left Intentionally Blank ...
Page 88: ...88 JOHNSON CONTROLS FORM 150 68 ICOM1 ISSUE DATE 10 15 2020 Page Left Intentionally Blank ...