7. Electrical installation
Installer reference guide / Mono tank integrated type 113
To connect the backup boiler (B4/B5)
1 Before connecting the backup boiler (output) signal wiring, the tank integrated hydro unit should be turned off.
2 Make sure to connect the backup boiler signal (output) at the correct terminal of the terminal block (as shown in the
diagram).
3 The output from the terminal block is a switched live ((B4) L 220-240V~) and a permanent neutral (B5 - N).
– Do not connect supply power to the backup boiler directly but connect via a 230Vac rated relays.
– The heat pump does not work when the backup boiler operates, this includes no zone-control, no pump control and
no temperature control in the zone(s).
B2 B6 B10 B14 B18 B22B4 B8 B12 B16 B20 B24 B26
B1 B5 B9 B13 B17 B21B3 B7 B11 B15 B19 B23 B25
Backup boiler (N)
Backup Boiler(L)
L N L N
When it set backup boiler
on the control kit (relay off)
When it order to backup
boiler operates (relay on)
Boiler Boiler
CAUTION
• The heat pump does not work when the backup boiler operates, this includes no zone-control, no pump
control and no temperature control in the zone(s).
Description No. of wires Mini./Max. current Thickness Remark
Backup boiler 2+ground 10mA /50mA
>0.75mm², H05RN-F or
HO7RH-F
Field supply
(220-240V~, Input)
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