Control Wiring; Figure 10 - Control Wiring - York YLUA0248 Series Installation Operation & Maintenance

FORM 150.73-NM2
ISSUE DATE: 09/07/2020
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XTBC1
XTBC2
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 disconnecting
power, PRIOR to working on equipment.

FIGURE 10 - CONTROL WIRING

JOHNSON CONTROLS

CONTROL WIRING

PWM INPUT (CAN ONLY BE USED WITH DISCHARGE AIR
TEMP CONTROL)
LOAD LIMIT INPUT
AIR PROVING SWITCH (DISCHARGE AIR TEMP CONTROL AND
SUCTION PRESSURE CONTROL) AND REMOTE START/STOP
SYSTEM 1 THERMOSTAT (SUCTION PRESSURE CONTROL ONLY)
(JUMPER FOR DISCHARGE AIR TEMP CONTROL)
SYSTEM 2 THERMOSTAT (SUCTION PRESSURE CONTROL ONLY)
(JUMPER FOR DISCHARGE AIR TEMP CONTROL)
(MUST BE CLOSED TO OPERATE)
BLOWER
SECTION 4 – INSTALLATION
*
* Factory wired with optional transformer.
LD07730C
The unit evaporator heater uses
120VAC. Disconnecting 120VAC power
from the unit, at or below freezing tem-
peratures, can result in damage to the
evaporator and unit as a result of the
chilled liquid freezing.
LD13344A
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