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Installation
38 Instruction manual SGE
3
is
3.12 Electrical
connection of the
solar heating system
This section covers the following topics:
• Preparation
• Connecting the mains power
• Connecting pump station - modulating pump
• Connecting solar collector
• Connecting tank sensor
• Connecting communication cable
Optionally you can connect an extra head pump and Q/T sensor:
• Connecting extra head pump
• Connecting Q/T sensor
3.12.1 Preparation
See Eratta.
has the following terminals:
3.12.2 Connecting the mains power
Note
Just as with the water heater controller, the solar heating system controller
must have a permanent electrical connection to the mains power supply. There
must be a double-pole isolator installed in the permanent connection. This is the
same double-pole isolator as installed between the mains power supply and the
water heater itself. Whenever this isolator is operated, both controllers can be
switched on or off.
1. Connect earth, live and neutral to terminals 1 through 3
2. Fit the cables in the strain relief.
3. Connect the power cable to the isolator.
4. Continue (3.12.3 "
Connecting pump station - modulating pump").
3.12.3 Connecting pump station - modulating pump
The pump station contains a modulating pump (4-wire connection). You must
connect this pump to the controller of the solar heating system.
1. Connect earth, live and neutral to terminals 10 through 12 .
2. Connect the fourth lead to terminal 13.
3. Fit the cables in the strain relief.
4. Continue (3.12.4 "
Connecting solar collector").
Power n.a. Pump ON/OFF Modulating pump n.a.
LN- - - L
1
NM
1
M
2
M
3
-------
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
1234123412341234
n.a.
n.a.
n.a.
n.a.
Power 5 V
n.a.
n.a.
n.a.
n.a.
Sensor S4
Flow signal
Sensor S1
Sensor S2
J3 J12 J13 J14
Semsor S1
Sensor S2