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WFC- SC(H) Series .Installation
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5.3.2. Inside of Junction box wiring
In the Junction box there is a noise filter and some connecting terminals as
figure 5-3-2.
Note1. All conductors must be from copper material.
Note2. All wiring must comply with local and national electrical code and regulation.
Terminal marking
Description
L1,L2,L3
400VAC 3phase 50Hz primary power supply
N
Not Used
PE
Ground line
P
Output control signal to chilling/heating water pump
CP
Output control signal to cooling water pump
P3A
Output control signal to heat medium pump (normal open)
P3B
Output control signal to heat medium pump (normal close) (Option)
CTF
Output control signal to cooling tower fan (Option)
CM1
Output signal common circuit
1
Not Used
2
Not Used
3
Error signal from chilling/heating water pump
4
Error signal from cooling water pump
5
Error signal from cooling tower fan
6
Error signal from heat medium pump
7
Not Used
8
Not Used
CM2
Error signals common circuit
S3, S4
Requirement heat medium output signal (Option)
Noise filter
Power supply terminal
Control signal output terminal
Connecting terminal
・
Connect the conductor by adjusting the
symbol (3,4,5,6,CM2) with figure 5-2-1 .
・
These are input terminal to the chiller.
・
Attention!
You must not give any voltage on to
these terminals.
・
Connect the conductor by adjusting the
symbol (P,CP,P3A,CM1) with figure 5-2-1 .
・
These are output terminal from the chiller .
・
Attention!
Do not exceed 24VAC, 60VA as shown in Figure 5-2-1.
・
Connect the 400VAC 3phase 50Hz power
supply. Connect the ground conductor to PE.
・
Circuit breaker and over -current protection
must be supplied externally by others.
Figure 5-3-2
P CP P3A P3B CTF CM1
Extra control
signal output
terminal
Error signal
input
terminal