York YLAA0285SE, Manual

Page: 43 / 206

43
JOHNSON CONTROLS
FORM 150.72-NM3 (1020)
ISSUE DATE 10/05/2020
SECTION 4 – INSTALLATION
4
FIG. 10 – CONTROL WIRING INPUTS
USER CONTROL WIRING INPUTS
It is possible that multiple sources of
power can be supplying the unit power
panel. To prevent serious injury or
death, the technician should verify
that NO LETHAL VOLTAGES are
present inside the panel AFTER dis -
connecting power, PRIOR to working
on equipment.
The unit evaporator heater uses
120VAC. Disconnecting 120VAC
power from the unit, at or below freez -
ing temperatures, can result in damage
to the evaporator and unit as a result
of the chilled liquid freezing.
LD13130
XTBC1
A-
A+
14
13
50
13
21
13
20
13
19
13
18
13
51
13
INTERNAL WIRING TO OPTIONAL REMOTE TEMP. RESET BOARD
FLOW SWITCH
REMOTE UNLOAD STEP 1
PWM REMOTE TEMP RESET
INTERNAL WIRING TO 2-KCR CONTROL RELAY
INTERNAL WIRING TO 1-KCR CONTROL RELAY
REMOTE START / STOP
All externally supplied contacts must
be capable of switching 24 VDC / 115
VAC. Gold contacts are recommended.
If supplied contacts are from a Relay
/ Contactor (Inductive Load), the coil
of the Relay / Contactor must be sup -
pressed. Typical suppressor is P/N
031­00808­000.