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SECTION 4 - INSTALLATION
Figure 19 - Reserved customer wiring entry
For YVAA chillers, if the water box heater option is
available, the customer has to connect a 115 V/60 Hz or
220 V/50 Hz, single-phase power supply to the wiring
box of the water box heater. The wiring box protects
the water box of the evaporator from freezing under
low ambient. The customer needs to break the reserved
customer wiring entry, as shown in Figure 19, with the
wiring going through an appropriate 90 degrees con-
duit. After connecting the wires, water proofing mea-
sures need to be taken to meet IP65.
24
6
A2
A2
2
2, 29, G
TO
JB1
325, 326, PE/G
ETH1
ETH2
325A, 326A, PE/G
Figure 20 - Water box heater wiring box
50
324
WBHTR
12
14
22
4
5
3
1
8
A1
11
21
325,
325A
RESERVED FOR
CUSTOMER WIRING
ENTRY
LD28284
Failure to connect the power connection
to the water box heater wiring box, or to
meet IP65, will void warranty.
115VAC-1PH-60HZ
220VAC-1PH-50HZ
(CUSTOMER CONNECTION)
PE/G
H
N
29
PE/G
324 326, 326A
PE/G
Form 201.28-NM1.1
Issue date: 08/06/2021
2
POLE BREAKER
10A 240V
LD28285
JOHNSON CONTROLS
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