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Fig. Terminal block
A. Screws
B. Cover
C. Terminal block
7.8.1 Preparation
In preparation, you must first remove the two covers, and the cover of the electrical
section.
Undo the screws of the covers.
Carefully remove the covers from the water heater.
The electrical section is now visible.
Loosen the 2 screws (A) and remove the cover (B) from the electrical section.
The connector block (C) is now visible.
Note
Consult the table for the connections and consult the electrical diagram for the electrical
component connections.
Mains voltage Isolating transformer Alarm Out Program
controlled
External BUS
Primary Secondary
pump ON/OFF link
N L
A
N L
1
A
N L
2
A
X
1
X
2
A
N L
3
A
X
3
X
4
X
5
X
6
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 to 20 21 22 23 24
7.8.2 Mains power
Note
The water heater is supplied without a power cable and isolator.
Use a power cable with cores of at least 3 x 1,0 mm
2
and a double-pole isolator with a
contact gap of at least 3 mm.
Connect the water heater to the mains power supply:
Connect neutral (N), live (L) and earth (A) of the power cable to terminals 1 thru 3 of
the terminal block as shown in the table (see section 7.8.1).
Fit the power cable in the strain relief.
Connect the power cable to the isolator.
If you have no more connections to make:
Fit the cover on the terminal block.
Fit the covers onto the water heater.
1.
2.
3.
n
n
1.
2.
3.
4.
-
-
66 Installation, Maintenance and Service part
66


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