Figure 13 - Control Wiring Outputs - York YLAA Series Installation Operation & Maintenance

SECTION 4 – INSTALLATION
140
123
32
31
30
29
28
27
26
25
24
23
5
Normally jumpered.
Can be used as
L
EMERGENCY STOP
contacts from an
2
external source.
2
2
GND
XTBC2
All chiller supplied contacts are rated at
115VAC, 100VA, resistive load only, and
must be suppressed at the load by user
if powering an inductive load (Relay /
Contactor Coil). Typical suppressor P/N
is 031-00808-000.
The unit evaporator heater uses 120VAC.
Disconnecting 120VAC power from the
unit, at or below freezing temperatures,
can result in damage to the evaporator
and unit as a result of the chilled liquid
freezing.

FIGURE 13 - CONTROL WIRING OUTPUTS

42
USER CONTROL WIRING OUTPUTS
INTERNAL WIRING TO EVAPORATOR HEATER
INTERNAL WIRING TO HOT GAS SOLENOID VALVE
SYSTEM 2 ALARM DRY CONTACTS (OPEN = ALARM)
SYSTEM 1 ALARM DRY CONTACTS (OPEN = ALARM)
SYSTEM 2 RUN DRY CONTACTS (CLOSE = RUN)
SYSTEM 1 RUN DRY CONTACTS (CLOSE = RUN)
EVAPORATOR PUMP DRY CONTACTS (CLOSE = RUN
BASED ON DAILY SCHEDULE)
INTERNAL 120 VAC WIRING TO F1 FUSE
INTERNAL 120 VAC WIRING (TYPICALLY FROM CONTROL TRANSFORMER)
INTERNAL NEUTRAL WIRING
INTERNAL NEUTRAL WIRING (TYPICALLY FROM CONTROL TRANSFORMER)
INTERNAL NEUTRAL WIRING
FORM 150.72-ICOM6
ISSUE DATE: 12/29/2017
LD13242
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.
JOHNSON CONTROLS