Johnson Controls YORK Tempo YLAA Series, Installation Operation & Maintenance

Page: 46 / 192

JOHNSON CONTROLS
46
FORM 150.72-NM1 (1020)
Installation
FIG. 11 – CONTROL WIRING OUTPUTS
USER CONTROL WIRING OUTPUTS
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.
All chiller supplied contacts are rated
at 115 VAC, 100 VA, resistive load only,
and must be suppressed at the load
by user if powering an inductive load
(Relay / Contactor Coil). Typical sup -
pressor P/N is 031­00808­000.
LD13242
XTBC2
140
123
32
31
30
29
28
27
26
25
24
23
5
L
2
2
2
GND
INTERNAL WIRING TO EVAPORATOR HEATER
INTERNAL 120 VAC WIRING TO F1 FUSE
INTERNAL 120 VAC WIRING (TYPICALLY FROM CONTROL TRANSFORMER)
INTERNAL NEUTRAL WIRING
INTERNAL NEUTRAL WIRING
INTERNAL NEUTRAL WIRING (TYPICALLY FROM CONTROL TRANSFORMER)
INTERNAL WIRING TO HOT GAS SOLENOID VALVE
SYSTEM 2 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)
SYSTEM 1 ALARM DRY CONTACTS (OPEN = ALARM)
Normally jumpered.
Can be used as
EMERGENCY STOP
contacts from an
external source.
115VAC
CONTACTS (CLOSE = RUN