York YCAL Series - Control Wiring; Fig. 3 - Control Wiring

JOHNSON CONTROLS
38
FORM 150.66-NM3
ISSUE DATE: 09/25/2020
SECTION 4 - INSTALLATION
CTB1
21
13
20
13
14
13
FLOW SW
REMOTE START/STOP
PWM INPUT
LOAD LIMIT INPUT
FIG. 3 – CONTROL WIRING
CONTROL WIRING
LD07730A
LD07725
It is possible that multiple sources
of power can be supplying the unit
power panel. To prevent serious in-
jury or death, the technician should
verify that NO LETHAL VOLTAGES
are present inside the panel AFTER
disconnecting power, PRIOR to work-
ing on equipment.
The unit evaporator heater uses
120 VAC. Disconnecting 120 VAC
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.
*
* Factory wired with optional transformer.
TB1