York YVAA Installation Operation & Maintenance page 44

SECTION 4 - INSTALLATION
Connect the 115 V/60 Hz or 220 V/50 Hz power sup-
ply to the top terminals of the 2-pole-breaker, as shown
in Figure 22 on page 43. Connect the hot line to ter-
minal H and the neutral line to terminal N. After con-
necting the terminals, turn on the breaker only when
the evaporator is filled with water in waterside. The
recommended power supply wiring size is 18-4-AWG.
Before turning on the breaker, make sure
the evaporator is filled with water. Misop-
eration may void the warranty and a water
box heater fail, which leads to the freezing
of the evaporator.
44
Form 201.47-ICOM1
Issue date: 17/11/2022
Evaporator heaters used in the unit may
malfunction without alarm. Once the
heater failure is found under subfreezing
condition, stop using the chiller and drain
off water from the evaporator completely
to protect the evaporator from freezing.
JOHNSON CONTROLS