23
STHCkW ed 04/09
HERCULES Condensing Export
Technical Documentation
Technical Documentation
Storage tank.
It is a 120 litre stainless steel storage tank with coil and totally
insulated using self-extinguishing polystyrene.
It has an external casing enclosed in the upper part by a flange
fixed using 12 screws which, can be removed if necessary.
This allows the extraction of the two coils (13) connected
in series to allow assembly of the solar panels kit (see “solar
panels kit” functioning). These are made up from a concentric
propeller-shaped stainless steel pipe, through the walls of which
heat exchange takes place between the primary circuit hot water
and the water contained in the storage tank.
This allows to keep the storage tank water at a constant tem-
perature and in the presence of a withdrawal guaranteed the
instant production of DHW.
If necessary, the storage tank can be extracted frontally by mak-
ing it pass on the two "slides" (18) on which it rests.
Its regular functioning and its integrity are guaranteed by the
following devices:
Anode (12).
It is inserted into the storage tank and protects it from the
action of galvanic currents. It is activated at the pump probe
pipe (17) present on the upper flange.
Polyphosphate dispenser (optional).
Prevents the deposit of lime scale on the walls of the coil.
The kit is mounted inside the casing, connecting it to the
domestic cold water inlet.
It can be accessed by opening the lateral door.
Cold water inlet unit (19).
It is situated at the cold water inlet and is fitted to the expan-
sion vessel (5) and the system filling valve (3).
As well as an 8 bar valve (10) that prevents the safety pressure
in the storage tank from being exceeded, it includes:
- one filter, one flow limiter da 30 l/min and one one-way
valve (see hydraulic circuit part. “9”) to prevent the consequent
pressure increase due to heating of the DHW causes return
towards the water network.
Pump kit (optional).
It allows the connection to any DHW recirculation system.
The kit includes a pump (11) that is housed inside the casing
with relative connection pipe to the template after having
removed the relative anode-support cap.
Storage tank draining valve (16).
It is a draining valve with hose union fitting for emptying the
storage tank in the case of maintenance or internal inspec-
tion.
NTC domestic hot water probe (14).
It allows the integrated P.C.B. to detect the temperature of the
water contained in the storage tank.
It is fixed to the external wall of the storage tank and is inserted
inside an immersion sample point.
Safety valve (10).
Prevents the safety pressure in the storage tank from being
exceeded (8 bar).
It is mounted on the domestic cold water inlet manifold unit
after the DHW one-way valve.
DHW expansion vessel (5).
It compensates the volume variation consequent of heating of
the water contained in the storage tank.
It is connected to the cold water inlet and has a pre-load pres-
sure of 3.5 bar with capacity of 5 litres.
5
16
11
17
12
14 18
13
10
3
19
AF
AC
Summary of Contents for Hercules Condensing 26 2 E
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