10
Subject to change without notice | 83054000dUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Electrical connections
Observe the following when performing all work:
DANGER!
Danger of fatal injury due to electric
current!
Electrical connections may be installed
only by qualified electricians.
Before opening the unit, disconnect the
system from the power supply and secure
it from being switched back on!
WARNING!
Observe the relevant EN‑, VDE and/or
applicable local safety regulations during
the installation and during all electrical
work.
Comply with technical connection
requirements of the responsible power
supply company (if required by the latter)!
NOTICE.
All live wires must be stripped before they are
installed in the cable duct of the switch cabinets!
Remove right side panel of unit, if necessary.…
Transport to installation location.
Open switch cabinet in unit…
To do this, only loosen the two upper screws of the
cover plate. Remove the remaining screws. Remove
cover plate….
Insert control and sensor wires and the wire for
the power company blocking contactor through the
bushings on the back of the unit. Guide wires via
the cable duct to the terminals in the switch cabi-
net…
Follow specifications of the terminal diagram for
electrical connections…
“Terminal diagram” for respective model.
SAFETY COMPONENT
The safety component for the heating circuit is in the ex-
tra box.
Mount the safety component on the connection provid-
ed on the top of the unit.
The safety drain of the safety valve must lead into the
drain via a funnel siphon in accordance with the applica-
ble standards and regulations!
HYDRAULIC CONNECTION OF HOT WATER TANK
Connect hot water tank according to DIN 1988 and DIN
4753, Part 1 (or the local applicable standards and direc-
tives).
Do not exceed the operating pressures specified on the
rating plate. Install a pressure reducer, if necessary.
ATTENTION
The electrical conductivity of the hot water out-
flow must be > 100 µS/cm and must be compara-
ble to water that is suitable for drinking.
EXPANSION VESSELS
The expansion vessel for the heating circuit, the corre-
sponding cap valve and the wall mount are included in
the scope of delivery. They must be integrated in the
heating circuit on-site in compliance with the applicable
standards and directives.
We recommend installing a suitable expansion vessel
(not included in delivery) in the hot water circuit. This
equalizes pressure fluctuations or water shocks in the
cold water network and prevents unnecessary loss of
water.
