© EUROHEAT DISTRIBUTORS (H.B.S) LTD. July 2011
Instructions Part Number IN1231 Ed 1
16
8 Electrical Connection/Equipment Interfaces
The EVO AQUA boiler is delivered ready-wired. Check that none of the cables have become detached. The
control circuit board is located under the left side cladding of the boiler, when viewed from the front.
Note the instructions in the lower half of this page!
8.1 Power Supply/Main Fuse
The device is designed exclusively for operation with 230 V AC / 50 Hz. It is connected by a 3-pole mains cable
with a shockproof plug. A protective earth device is essential.
A 5 x 20 2.5 A T glass fuse is provided as the integral main fuse. The fuse is located on the left rear side of the
boiler.
Important Information:
The electrical supply must be isolated before carrying out any work on the appliance. The electrical supply must
be isolated when connecting an automatic pellet conveying system.
Electrical connections on the appliance must be performed by a qualified engineer and in accordance with the
applicable regulations. We accept no liability in the event of any damage caused by incorrect connections and
the warranty will be void.
No electrical connecting cables from and to the appliance must come into contact with hot external surfaces of
the stove or flue tube. The cables must not be laid over sharp edges.
8.2 Pin Assignment in Main Control Unit
Notes:
The external control terminals have a cable bridge which allows the boiler to heat up when ever energised.
An external controller such as a room thermostat or timer can be connected at this point after removing the
bridging wire. No voltage must be applied.
Never connect the boiler mains input via any external controller such as a time clock, as this will prevent the
boiler shutdown sequence.
Never remove the electrical supply in order to stop the burner. The burner can only be shut down correctly by
opening the external control terminal loop or by switching off manually.
1
2
3
4
5
6
7
8
18 17 16 15 14 13 12 11 10
9
2
3
1
4
4
2
3
5
6
7
8
9
10
11
12
1
1
2
3
Atmal
J2
J1
J3
J1
2
J8
J1
1
J10
J9
J6
J4
External control terminals- 24 V, 6 mA. The
connection terminals for potential-free
external control devices.
