Domestic wa
ter
Caution
Draining the domestic hot water tank:
1. Shut off the domestic cold water inlet.
2. Open a hot water tap in the installation.
3. Open a valve on the safety unit.
4. When the water stops flowing, the domestic hot water tank
has been drained.
Caution
The pressure limiter device (safety valve or safety unit) must
be regularly operated in order to remove limescale deposits
and ensure that it is not blocked.
A pressure limiter device must be fitted to a discharge pipe.
As water may flow out of the discharge pipe on the pressure
limiter device, the pipe must be kept open to the air, in a
frost-free environment, and at a continuous downward gradi
ent.
A pressure reducer (not provided) is required when the sup
ply pressure exceeds 80% of the pressure limiter device cal
ibration and must be located upstream of the appliance.
There must be no cut-off devices between the pressure lim
iter device and the domestic hot water tank.
To ascertain the type, specifications and connection of the
pressure limiter device, refer to the chapter Connecting the
Domestic Hot Water Tank to the Drinking Water Mains in the
Installation and Service Manual.
Hydraulics
Caution
Respect the minimum and maximum water pressure and tem
perature to ensure the appliance operates correctly. See
chapter on Technical Specifications.
Installation
Important
Allow the space required to install the appliance correctly, re
ferring to the chapter Dimensions of the Appliance. See the
Installation and Service Manual.
1.2
General instructions
The system must satisfy each point in the rules in force in the country that
govern works and interventions in individual homes, blocks of flats or other
buildings.
Only qualified professionals are authorised to work on the appliance and
the heating installation. They must respect prevailing local and national
regulations during fitting, installation and maintenance of the installation.
Commissioning must be performed by a qualified professional.
1.3
Electrical safety
Before making any electrical connections, earth the appliance in
accordance with prevailing standards.
1 Safety instructions and recommendations
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7762758 - v05 - 19082020
