Install the cold water connection:
1. When the mains water supply pressure is too high, install a pressure relief valve (1),
refer to the T
echnical details.
2. Install a non-return valve (5).
3. Install an expansion valve (15).
4. Connect the overflow connection of the expansion valve, to an open waste water
pipe.
5. Install an expansion vessel (16).
8.4.2 Hot water connection
Note
Insulate long hot w
ater pipes to prevent unnecessary energy loss.
Note
The use of a T&P v
alve is mandatory.
Install the hot water connection:
1. Install a stop valve (11) in the hot water outlet pipe for service reasons.
2. Install a T&P valve (3).
3. If applicable, install a temperature gauge (12).
8.4.3 Circulation connection
Install a circulation system when an immediate flow of hot water at draw-off points is
required. This impro
ves comfort and reduces water wastage.
Note
Connect the circulation pipe (C) to the cold w
ater inlet connection.
Note
Make sure that the circulation pump has the correct capacity for the length and
resistance of the circulation system.
Install a circulation pump:
1. Install a circulation pump (6).
2. Install a non-return valve (5) after the circulation pump to make sure that the
direction of circulation is guar
anteed.
3. Install a stop valve (4) before the circulation pump.
4. Install a stop valve (4) after the non-return valve.
5. Connect the circulation pipe (C) to the cold water inlet, between the water heater
and the expansion v
essel (16).
8.5 Electrical connections
Warning
Lea
ve the water heater electrically isolated until you are ready to commission it.
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w
38 Installation, Maintenance and Service part
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