JOHNSON CONTROLS
50
SECTION 4 - INSTALLATION
Form 201.28-NM1.1
Issue date: 08/06/2021
LD28284
RESERVED FOR
CUSTOMER WIRING
ENTRY
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
wiring going through an appropriate 90 degrees con-
duit. After connecting the wires, water proofing mea-
sures need to be taken to meet IP65.
Failure to connect the power connection
to the water box heater wiring box, or to
meet IP65, will void warranty.
LD28285
22
24
5
8
6
12
14
3
4
1
11
A1
21
A2
A2
PE/G
H
N
220VAC-1PH-50HZ
(CUSTOMER CONNECTION)
324 326, 326A
2
POLE BREAKER
10A 240V
324
325, 326, PE/G
ETH1
325A, 326A, PE/G
ETH2
TO
JB1
2, 29, G
2
29
325,
325A
115VAC-1PH-60HZ
PE/G
PE/G
WBHTR
Figure 20 -
Water box heater wiring box