4.5.3.
Connection of an independent hot water
tank
The standard version of the heating-only type of boiler is fitted with a
command for regulation of the hot water tank circuit. The command
is adjusted to switch preferentially to the hot water tank circuit. This
gives priority to the hot water tank when simultaneous requests for
heat come from the hot water tank and the central heating. The
indirectly heated calorifier can be connected using an internal or
external three-way valve.
Internal three-way valve
1
Boiler
2
Independent hot water tank
3
DHW sensor
4
Air vent kit of the hot water tank
5
Safety unit
6
Expansion vessel
7
Heating-Installation
8
3-way valve
The boiler connection kit must be used to install the three-way valve
in the boiler (Accessory). The three-way valve (230 V) is controlled
by the boiler control unit of the boiler.
¼
For the installation or mounting of any accessories, refer to the
mounting instructions delivered with the accessories in question.
4
A safety unit is installed at the point where cold water
arrives at the hot water tank to prevent backflow or
overpressure.
4
The central heating pipes for the boiler circuit must be
in Ø 22 mm (From Ø 15 mm to Ø 22 mm at the boiler
itself).
T004865-A
1
2
4
6
7
M
3
5
8
Calenta 25s - 28c - 35s - 40c
4. Installation
040412 - 7600585-01
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