Open Expansion Tank System - LA NORDICA TERMOISOTTA DSA Instructions Pour L'installation, L'utilisation Et L'entretien

TERMOISOTTA DSA
instructions.
Installation must be carried out by authorised personnel who must provide the buyer with a system declaration of conformity and will
assume full responsibility for final installation and as a consequence the correct functioning of the installed product.
Before installing the appliance, carry out the following checks:
• Make sure that the floor can support the weight of the appliance, and if it is made of flammable material, provide suitable insulation
(DIMENSIONS ACCORDING TO REGIONAL REGULATIONS). With a flammable floor the appliance must be installed on a 12
cm thick stone or concrete slab.
• Make sure that there is adequate ventilation in the room where the appliance is to be installed, with particular attention to windows
and doors with tight closing (seal ropes).
• Do not install the appliance in rooms containing collective ventilation ducts, hoods with or without extractor, type B gas appliances,
heat pumps, or other appliances that, operating at the same time, can put the room in depression (ref. UNI 10683 standard)
• Make sure that the flue and the pipes to which the appliance will be connected are suitable for its operation. It is not allowed the
connection of various appliances to the same chimney.
• The diameter of the opening for connection to the chimney must at least correspond to the diameter of the flue gas pipe. The opening
must be equipped with a wall connection for the insertion of the exhaust pipe and a rosette.
• The installation must be appropriate and has to allow the cleaning and maintenance of the product and the flue.
Before installation, accurately wash the pipes of the system in order to remove any residuals that could compromise the correct functioning
of the appliance.
IMPORTANT:
a) It would be appropriate to install an automatic or manual air valve to allow the air outlet from the plumbing system;
b) In case of water leaking, close the water supply and promptly warn the after sales technical service;
c) The system working pressure must periodically be checked.
d) If not using the boiler for a long period of time, it is recommended that the after sales technical service is contacted to carry out at least
the following operations:
• close the water taps of both the thermal system and the domestic hot water system;
• empty the thermal system and the domestic hot water system if there is risk of freezing.
The DSA thermo appliances, can be installed in both an OPEN expansion Tank system (see chapter 3.1) and a CLOSED expansion Tank
system (see chapter 3.2).
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.
3.1.

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 thermo-product 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. THERMAL DISCHARGE VALVE 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. AUTOMATIC THERMOSTATIC MIXING VALVE – (see chapter 3.3)
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
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