Hoval RoofVent CON-9, Design Handbook

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7.3 Electrical installation
Caution
Danger from electric current. The electrical installation
must be carried out by a qualified electrician!
■ Comply with all relevant legislation (e.g. EN 60204-1).
■ For long supply lines, select cable cross-sections in
accordance with the technical regulations.
■ Carry out electrical installation in accordance with the
wiring diagram (for wiring within the unit, see Fig. B7).
■ Install the system bus for the control systems separately
from the mains cables.
■ Establish plug connections from the Air-Injector to the filter
box and from the filter box (inside) to the roof unit.
■ Wire the mixing valves to the connection box. (There is a
plug connection for Hoval magnetic mixing valves.)
■ For injection system: Wire the pump to the DigiUnit
terminal box.
■ Make sure there is onsite overload protection equipment
for the mains connection line of the zone control panel
(short circuit resistance 10 kA).
DigiUnit terminal box with isola-
tion switch
Cable feedthroughs and plug-in
connections
Power supply
Bus cable
Connection box
Fig. B7: Wiring in unit
RoofVent
®
LHW
Transport and installation