42
4.
Thermally insulate pipes inside the
building.
5.
Connect the drain hose to the safety
valve.
Connect the drain hose with a slope
and a pipe vent to the public sewer.
Note
■ In underfloor heating circuits, install a
temperature limiter to restrict the max-
imum temperature for underfloor heat-
ing systems (see page 48)
■ Safeguard minimum flow rate, e.g.
with overflow valve (see Specification
on page 125)
Connecting a cooling circuit if required
For area cooling systems (e.g. under-
floor heating circuit, chilled ceiling), a
contact humidistat (accessory) is
required.
Requirements for the contact humidistat:
■ Electrical connection: 230 V~, 0.5 A
■ Installation inside the room to be
cooled at the cooling water flow
(remove thermal insulation if required)
■ If several rooms with different relative
humidity are part of the cooling circuit,
fit and connect several contact humidi-
stats in series:
Switching contacts as N/C contacts
Electrical connection
Routing electrical cables to the wiring chamber of the internal
unit
Danger
Damaged cable insulation can
cause injury and damage to the
appliance.
Route cables so that they cannot
touch very hot, vibrating or sharp-
edged components.
Danger
Incorrectly routed wiring can lead
to serious injury from electrical
current and result in equipment
damage.
Installation sequence
Connecting a secondary circuit
(cont.)
5604 692 GB
