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STZM@ ed 05/04 ZEUS Maior @
Technical Documentation
Technical Documentation
Storage tank.
It is a coil type storage tank made entirely in AISI 316L stainless
steel with a total capacity of 60 litres (54 useful litres).
It is completely insulated with self-extinguishing polystyrene
and consists of an external casing closed at the bottom by a
flange secured with 12 screws.
Inside is a stainless steel concentrically spiral shaped pipe (coil)
that travels the full height of the storage tank and through
whose walls the thermal exchange takes place between the hot
water in the primary circuit and the water inside the storage
tank.
is keeps the water inside the storage tank at a constant tem-
perature and guarantees, whenever water is drawn, the instant
production of domestic hot water.
e coil can, if necessary, be taken out of the storage after
having removed the bottom inspection flange.
e following devices ensure its correct operation and integ-
rity:
Anode (1).
It is inserted inside the storage tank and protects it against
galvanic currents.
It is screwed to the bottom flange.
Polyphosphates metering unit (optional).
is prevents lime scale depositing on the coil walls.
e kit is mounted at the domestic cold water inlet.
Recirculation kit (optional).
With this kit the pipes of the domestic hot water recirculation
system (if one is installed) can be connected.
It consists of a pipe that is inserted in the storage tank after
having removed the anode with its cap.
When the kit is installed, the anode is screwed on the end of
the pipe.
Another kit is available (optional) that includes a pump (circula-
tor) for the d.h.w. recirculation system.
is kit is installed inside the space taken up by boiler and
the circulator projects slightly from under the plastic grille at
the bottom of it.
Domestic hot water NTC probe (B2) (9).
anks to this probe the modulation board can measure the
temperature of the water inside the storage tank.
It is fixed to the outside wall of the storage tank inside an
immersed holder.
Safety valve (13).
It is situated at the bottom of the storage tank by the domestic
cold water inlet.
Besides an 8-bar valve (10), that prevents the safety pressure
being exceeded inside the storage tank, it also includes:
- a filter, a storage tank draining cock with hose fitting (12)
and a one-way valve (see the hydraulic circuit, part. “5”) to
prevent the increase in pressure, resulting from heating the
domestic hot water, from causing the water to return to the
water mains.
Coil
delivery
Coil
return
11
D.h.w. expansion tank (11).
It compensates for variations in volume that result from heating
the water inside the storage tank.
It is connected to the safety valve and has a 2-litre capacity
with a pre-load pressure of 3.5 bar.
Hot
water
outlet
Cold
water
inlet
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