11
Open the electrical wiring chamber of the HMU. Dis-
connect the cable of the ON/OFF switch and remove.
See electrical connections.
1.
Unclip the ON/OFF switch from the frame
2.
Remove the ON/OFF switch and its cable.
3.
Clip the ON/OFF switch into the corresponding
opening at the top or on the right-hand side.
Reconnect the cable in the HMU wiring chamber
and relieve strain.
4.
Release plug of electrical connections by turning it
a quarter turn.
5.
Insert plug into the opening on the right-hand side
and secure in place by turning it a quarter turn.
Preparing for boiler installation
Use a connection set – available as an accessory – to
make the connections on the gas and water sides. The
following overview shows sample connection sets for
surface mounting, with connection to the top or side.
Attaching accessories
Before final siting, attach all of the accessories that are
to be mounted from the back of the boiler (e.g. connec-
tion set). First fit the connection set for the DHW circu-
lation pump.
!
Please note
To prevent appliance damage,
connect all pipework free of load and torque
stress.
Preparing connections on site:
Connection set installation instructions
Note
Fit safety equipment in accordance with the national
regulations.
Preparing for installation
Relocating the ON/OFF switch and electrical…
(cont.)
6151778
Installation
