Part 3 - Ins
talla
tion and Field Se
ttings
DC Inverter Chiller
55
Table 3-4.3: Wiring requirements
Item
Description
Current
Required number of
conductors
Maximum running
current
Minimum wiring size
1
User interface wire
1
AC
5
200mA
0.75-1.25mm
2
Auxiliary heater control wire
AC
2
200mA
1mm
2
3
Pump control wire
AC
2
200mA
1mm
2
4
ON/OFF signal wir
e
DC
2
-
0.75mm
2
5
Cool/Heat signal wire
DC
2
-
0.75mm
2
6
Alarm signal wire
AC
2
200mA
0.75mm
2
7
Water flow switch signal wire
DC
2
-
0.75mm
2
8
Compressor state signal wire
2
AC
2
200mA
0.75mm
2
9
Water pressure switch wire
2
DC
2
-
0.75mm
2
10
Inverter Pump control wire
2
DC
2
-
0.75mm
2
11
Dual temperature set points switch
2
DC
2
-
0.75mm
2
Notes:
1. 5-core shielded wire is required; the standard maximum wire length is 50m.
4.6
Modbus Gateway
Up to 16 wired controllers can be connected together, with each controller controlling up to 16 units.
Figure 3-4.5: Modbus Gateway wiring connectio
n
