Immergas VICTRIX 26 2 I, Руководство пользователя

Страница: 19 / 62

17
STV2I ed 11/09 VICTRIX 2 I Export
Technical Documentation Technical Documentation
Operation.
A DHW withdrawal leads to the passage of cold water inside
the DHW flow switch (1) and the consequent closure of the
electric contact coupled to it ( see electric circuit ).
Following this, the integrated P.C.B. starts the domestic hot
water priority functioning phase that leads to burner ignition
and, whenever a central heating request is in progress, the di-
version of the 3-way valve (2) and its consequent shifting into
the work position ( see hydraulic 3-way valve functioning ).
This leads to the closure of the flow pipe (M) and the simulta-
neous opening of the passage towards the domestic hot water
heat exchanger (3).
In this way circulation is prevented in the central heating plant
while it is allowed in the plate heat exchanger, inside which the
domestic cold water absorbs the heat contained in the primary
circuit water ( see domestic hot water heat exchanger ).
The CH function is excluded in this phase, over which the
production of DHW has priority.
The water/water heat exchange takes place inside the domestic
hot water heat exchanger (3), which is fixed using screws to
the domestic hot water inlet (1) and to the domestic hot water
outlet (2).
The top part of the left body allows the inlet of domestic cold
water, while the lower part allows the return of the primary
circuit.
In the same way, the top part of the right body allows output
of domestic cold water and the flow of the primary circuit in
the lower part.
The domestic hot water probe (4) is present on the domestic
hot water outlet pipe (5), which allows the integrated P.C.B.
to detect the temperature of the domestic hot water.
Secondary circuit (Domestic Hot water Circuit) for instant versions.
1
3
2
5
4
Domestic cold
water inlet
Primary circuit
flow
Primary
circuit
return
Domestic hot
water outlet
Domestic hot
water outlet