CTC Union GSi 600 Series, Installation And Maintenance Manual

Page: 51 / 136

51
CTC GSi 600
L1
L2
L3
1
2
3
4
Valve bedrock (Y31)
230 V 1N~
3-way valve Y31 is connected with pump G31 at the following terminal
blocks:
Expansion card (A3) X6:
Control voltage: black Terminal block X6:8
Phase: brown Terminal block X6:9
Zero: blue Terminal block X6:11
From electricity
distribution board
Current sensor
Fuse panel
Connect to G37–G40 on the sensor
terminal block. Use at least a 0.5 mm
2
cable.
8.12 Current sensor connection
(accessory)
The current sensors are connected at G37–G40 on the sensor terminal
block.
The three current sensors, one for each phase, are fitted on the fuse panel.
Each phase from the electricity distribution board supplying the product
is channelled through a current sensor before termination at the relevant
terminal. This allows the phase current to be sensed all the time and
compared with the value set for the heat pump’s load switch. If the current is
higher, the control unit drops to a lower heat output on the electric heater. If
this is insufficient, the heat pump is also limited. When the power drops back
below the set value, the heat pump and electric heater are reconnected. This
means that the current sensors, along with the electronics, prevent more
power being supplied than the main fuses can tolerate.
The current sensors’ cable holes are 11 mm in diameter.
The current sensor connection has no alarm, but the current value can be
read in the “Operation data” menu. Note that the tolerance/accuracy is very
low with small current values.