36
Recommendation: Install the safety
valve higher than the top edge of the cyl-
inder. This protects the valve against
contamination, scaling and high temper-
atures. The DHW cylinder does not then
need to be drained when working on the
safety valve.
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 connections
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.
■ Route LV leads < 42 V and
cables > 42 V/230 V~/400 V~
separately.
■ Strip the insulation from the
cables as close to the terminals
as possible, and bundle tightly
to the corresponding terminals.
■ Secure cables with cable ties.
Installation sequence
Connections on the DHW side
(cont.)
5782 201 GB
