Nordica DSA Manuel Utilisateur page 25

After testing the proper working of the appliance, some days from the installation, it is possible to proceed with the
construction of its aesthetic covering.
WARNING: During the surround building operations it must kept in mind possible and subsequent electrical installed parts
maintenance (Fans, temperature probe, etc) and with hydraulic systems all parts connected to the product.
La NORDICA S.p.A. declines all responsibility for damage to things and/or persons caused by the system. In
addition, it is not responsible for any product modified without authorisation and even less for the use of non
original spare parts.
Your regular local chimney sweep must be informed about the installation of the appliance so that he can check the correct connection
to the chimney.
OPEN expansion Tank system
It is COMPULSORY that the OPEN expansion Tank system is provided with:
1. OPEN EXPANSION Tank: which has a capacity of 10% of total water content of thermo-product and of the installation. This is
installed at the highest point of the system, at least 2 m over the radiator that is at the highest level.
2. SAFETY PIPE : that connects through the shortest way, without descending or siphoning parts, the delivery of thermoproduct to
the upper side of open expansion tank. ATTENTION: The inside diameter of the supply pipe which connects the thermoproduct
with the open expansion vessel must be equal to the internal diameter of the supply junction present in the thermoproduct. The
above mentioned connection pipe must be without siphoning parts.
3. LOAD PIPE : which connects the bottom of open expansion tank with the return pipe of installation. The minimum diameter must
be ¾" gas. All those parts must no have for any reason meditate intercept bodies that could accidentally exclude them and must
be placed in rooms which are protected from frost. On the contrary, if they freeze, the boiler body could break or even explode.
In case of frost placing it will be right to add a proper percentage of antifreeze liquid to the water of installation in order to delete
the whole problem. In no way there must be water circulation in the open expansion tank between the safety and loading pipe.
This would cause the water oxygenation and the consequent corrosion of thermo-product and installation in a very short time.
4. AUTOMATIC THERMAL DISCHARGE VALVE DSA which is a further positive safety that prevents the boiling even when
electric energy is missing. It is made by a valve cover like a pressure safety valve which differs from it as it opens by reaching
a pre-calibrated temperature (normally at 94 – 95°C) and unload hot water from the installation delivery. This will be replaced
with as much cold water coming from the open expansion tank loading pipe of open tank by draining away the excessive heat.
5. SAFETY VALVE FROM 1,5 bar: maximum operation pressure allowed for the system is 1,5 bar (equal to 15 m of the water
column). Higher pressures can cause deformation and breakage of the boiler body.
6. SAFETY DEVICES envisioned by Regulations in vigour.
7. CIRCULATION PUMP : . It would be better to install it on the return in order to avoid that it could disconnect itself at very high
water temperatures but checking that it does not drive water in the open expansion tank otherwise it should cause a continuous
water oxygenation with consequent, fast corrosion of boiler body. It must be not to avoid a forced circulation in the open
expansion tank. Furthermore it must be electrically connected to a thermostat or a electronic control unit that can be purchased
with the thermo-fireplace as OPTIONAL part.
8. ANTI-CONDENSATION MIXING VALVE – (see chapter)
ATTENTION: temperature safety sensors must be in place on the machine or at a distance no greater than 30 cm from the
flow connection of the thermo-product. Whenever the thermo products lack a device, those missing can be installed on the
thermo product flow pipe, within a distance no greater than 1m from the thermo product. All those parts must no have for
any reason meditate intercept bodies that could accidentally exclude them and must be placed in rooms which are protected
from frost. On the contrary, if they freeze, the boiler body could break or even explode.
ATTENTION: For no reason must the fire be ignited before the system has been completely filled with water; doing
this would lead to serious damage of the entire structure. The system must be filled by means of the loading pipe
directly from the open tank in a way to prevent an excessive pressure of the water network deforming the body of the
thermo heating stove.
The system must be kept constantly full of water even during the periods when the use of the thermo-heating stove is not
requested. During the winter, inactivity must be faced with the addition of antifreeze.
CLOSED expansion Tank system
It is COMPULSORY that the CLOSED expansion Tank system is provided with:
1. A SAFETY VALVE - maximum operation pressure allowed for the system is : see DECLARATION OF PERFORMANCE - CE
MARKING INFORMATION. Higher pressures can cause deformation and breakage of the boiler body. ATTENTION: The inside
diameter of the supply pipe which connects the thermoproduct with the security valve must be equal to the internal diameter of
the supply junction present in the thermoproduct. The above mentioned connection pipe must be without siphoning parts.
2. ANTI-CONDENSATION MIXING VALVE – (see chapter)
3. AUTOMATIC THERMAL DISCHARGE VALVE DSA or TEMPERATURE SAFETY RELIEF VALVE, with double safety sensor
4. CLOSED EXPANSION Tank can be installed on the thermo product return pipe. ATTENTION: The inside diameter of the return
pipe which connects the thermoproduct with the closed expansion vessel must be equal to the internal diameter of the return
junction present in the thermoproduct. The above mentioned connection pipe must be without siphoning parts.
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