Yazaki Aroace WFC-SC10 User Manual

8
TERMINALS
SYMBOL
LOCATION
REMARKS
Control Box
Junction Box
Field wiring
connections
Control Box
(I/O Board)
Molex Connector
STANDARD JUNCTION BOX
CONNECTIONS
TERMINAL
DESCRIPTION
REMARKS
3 (P1E)
Chilled/hot water
pump safety
interlock
Safety interlocks
MUST be
connected or the
unit will lock out
with pump/fan
error codes.
4 (P2E)
Cooling water
safety interlock
5 (FE)
Cooling tower fan
safety interlock
6 (P3E)
Heat medium
pump safety
interlock
CM1
Common to
terminals CP,
CTF, P, P3A, P3B
No voltage
supplied by
WFC-S unit on
this terminal
CM2
Common to
terminals
3, 4, 5, 6
WFC-S unit
supplies 15vdc
on this terminal
CP (P2)
Cooling water
pump demand
Dry contacts,
24v, 60va max
load
P (P1)
Chilled/hot water
pump demand
P3A
Heat medium
bypass valve –
demand position
P3B
Heat medium
bypass valve -
bypass position
S3, S4
Heat medium
pump demand
SOLUTION PUMP OVERLOAD SETTINGS
SYMBOL
WFC MODEL (*208 Volts AC)
SC/SH10
SC/SH20
SC/SH30
SC50
THRP
0.4
0.7
2.0
4.5
*Power supply tolerance is +10%, -5%
FUSE RATING
SYMBOL
AMPS (A)
REPLACEMENT
F2
3
Bussman GLQ-3
or GMQ-3.2,
rated 300vac
F4,
F11, F12
2
Fuji FGAO-2,
rated 250vac
FT1, FT2
5
Fuji FGAO-5,
rated 250vac
INTERNAL WIRING
SYMBOL
DESCRIPTION
REMARKS
CTI
Cooling water inlet
temperature sensor
CVR
Changeover valve
Only on SH
models
F2, F4,
F11, F12,
FT1, FT2
Fuses
Refer to Fuse
Rating Table
FS1
Chilled/hot water
flow switch
HWT
Heat medium
temperature sensor
LT
Evaporator
temperature sensor
LTPV
Refrigerant
proportional
control valve
MP
Solution pump motor
contactor
RMP, RP3,
RV9, RBO
Control relays
5 amp, 250v
max load
SA1, SA2
Surge absorbers
SP
Solution pump
SV1
Evaporator freeze
protection valve
SV9
Concentrated solution
bypass valve
SV11
Refrigerant
drain valve
Only on SH
models
THRP
Solution pump
thermal overload
TR-LV
Low voltage
transformer
24vac primary /
18, 15vac dual
secondary
WFC-TRUL1
Class 2 transformer
208vac primary /
24vac secondary
WTO
Leaving chilled/hot
water temp sensor
OPTIONAL JUNCTION BOX CONNECTIONS
TERMINAL
DESCRIPTION
REMARKS
1, 2
(DCP)
Arotrend Remote
Monitoring connection
For use with
Optional
Arotrend System
7, 8
LON Adapter
connection
For use with
Optional
Factory-Installed
LON Adapter
A (C1)
Remote cool mode
selection
Remote control
(BMS) interface.
ONLY USE DRY
CONTACTS to
control these
signals!
B (H1)
Remote heat mode
selection
C (CHON)
Remote "Enable"
signal
D (CHOFF)
Remote "Disable"
signal
E (CM3)
Common for
A, B, C, D
The WFC-S unit
outputs 15vdc on
this terminal
CTF
Cooling tower fan
cycling control
Dry contacts.
24v, 60va max
load.
S5, S6
Heat mode
feedback relay
S7, S8
Cool mode
feedback relay
S11, S12
"Enabled" mode
feedback relay
S13, S14
Alarm feedbackrelay

Yazaki Aroace WFC-SC10 Specifications

General

Brand	Yazaki
Model	Aroace WFC-SC10
Category	Chiller
Language	English