NOTES:
1. Full Load Amps (FLA) marked on motor nameplate.
2. Use minimum 14 AWG copper conductors for absorption chiller power supply.
Table 1 ELECTRICAL DATA
MODEL
WFC-SC10
WFC-SH10
WFC-SC20
WFC-SH20
WFC-SC30
WFC-SH30
POWER
SUPPLY
(V)
208
208
208
SOLUTION PUMP
(3 PH)
OUTPUT
FLA
(HP)
(A)
1/8
0.46
1/6
0.75
1/3
2.04
POWER SUPPLY
MIN. CIRCUIT AMPS
MAX. FUSE SIZE
)
A
(
)
A
(
5
1
6
.
0
5
1
9
.
0
5
1
6
.
2
20
POWER WIRING
Select the disconnect, fuses and supply
conductors for each absorption chiller based on
the minimum circuit ampacity and maximum fuse
size on the UNIT NAMEPLATE as per the
Electrical Data in Table 1. Install conduit to the
field wiring junction box and leave sufficient clear-
ance for removal of panels and service access.
DO NOT attach conduit to the absorption chiller
cabinet. The 1/2 in. trade size conduit entry in the
junction box will accommodate four (3 live and 1
grounded) 14 AWG copper conductors in most
wire styles. DO NOT USE ALUMINUM
CONDUCTORS.
Locate the disconnect within sight of and
readily accessible to the equipment, per Section
440-14 of the National Electrical Code.
DO NOT CLOSE THE DISCONNECT until
approved by an Authorized Yazaki Service
Provider.
CONTROL WIRING
All field control wiring connections to the
absorption chiller are low voltage (less than 30 V
AC) class 2 circuits and may be installed with or
without conduit. A 1/2 in. trade size conduit should
be installed to protect the wire against physical
damage or for aesthetic reasons. If
conduit is not used, a bushing must be inserted
into the wire entries of the junction box. Route
additional wiring to the control box for optional
input and output controls through the absorption
chiller junction box.
Motor contactors and overload relays for the
chilled/hot water pump, cooling water pump, heat
medium pump and cooling tower fan are not
installed in the absorption chiller and must be
supplied by others. Refer to the relevant Field
Wiring Diagram (Single Module or Multiple
Modules) for the recommended wiring of these
controls.
Use 18 AWG type T wire or equivalent for all
low voltage field circuits up to 50 ft. (for longer
distances use a 16 AWG conductor).
