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STVP ed 02/06 VICTRIX Plus
Secondary circuit (domestic hot water circuit).
e secondary circuit comes into use whenever it is necessary
to bring the temperature in the storage up to the temperature
wanted, measured with the d.h.w. NTC probe (4).
Operation.
Following a domestic hot water request, the modulating control
board starts the boiler pump (1) and powers the electric 3-way
diverter valve motor (2). When the valve consequently moves
into the d.h.w. position (see electric 3-way diverter valve), it
closes the system return pipe (R1) and simultaneously opens
the storage tank coil return pipe (RB).
In this way, circulation is permitted in the coil (3) which,
through its walls, lets the cold domestic water absorb the heat
contained in the primary circuit water.
In this phase the heating function is off, the production of
domestic hot water having priority.
Storage tank.
e PLUS storage tanks, 80, 105, 120 and 200 litres, consist
of a coil storage tank insulated with polystyrene and fitted with
a casing and control panel.
e storage tank is made entirely in AISI 316 L stainless steel
and comprises an external casing enclosed at the top by a flange
fixed with 12 screws.
A coil is housed inside (two coils in the 120- and 200-litre
versions) consisting of a concentric spiral shaped stainless
steel pipe and through whose walls thermal exchange occurs
between the primary circuit hot water and the water inside
the storage tank.
is keeps the water inside the storage tank at a constant
temperature and, when water is drawn, the instant produc-
tion of hot water.
Whenever it is necessary, the coil can be taken out of the storage
tank after removing the top inspection flange.
e storage tank features a series of devices that, besides guar-
anteeing proper operation, also guarantee integrity:
Anode (6).
It is inside the storage tank and preserves it from the galvanic
currents. It is screwed to the top flange.
Polyphosphates metering unit (
optional).
It prevents limescale depositing on the coil walls.
e kit is mounted on the domestic cold water inlet.
Safety valve unit (14).
is unit is located at the top of the storage tank, by the do
-
mestic cold water inlet.
Besides an 8 bar valve (“7” d.h.w. circ.) that prevents the safety
pressure inside the storage tank from being exceeded, this unit
also includes:
- a one way diverter valve (“8” d.h.w. circ.) that prevents the
increase in pressure (as aresult of heating domestic water)
from causing a return to the water mains.
- a 12 l/min flow limiter (only on the 80- and 105-litre ver-
sions).
Technical DocumentationTechnical Documentation
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