Open Expansion Vessel System - Nordica FOCOLARE 80 Idro Crystal - DSA Instructions Pour L'installation, L'utilisation Et L'entretien

c) 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.
La Nordica S.p.A. declines any responsibility for damages to things and/or people caused by the installation.
Furthermore it is not responsible of any modified product without authorisation as well as 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.
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.
•
Make sure that there is adequate ventilation (by means of an air intake, see chapter 7) in the room where the
appliance is to be installed.
•
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 10683/98 standard)
•
Make sure that the flue and the pipes to which the appliance will be connected are suitable for its operation.
•
Always leave of air gap on sides and rear between the thermo-fireplace and the walls. (see Picture 13)
•
Using the adjustable feet and a level, make sure that the appliance is perfectly level to ensure the correct
movement of the door.
We recommend having your local chimney sweep check both the chimney connection and that there is sufficient air
flow for combustion in the place of installation.
DO NOT MODIFY THE APPLIANCE.
The diameter of opening for the connection to the connection of chimney must correspond to the smoke pipe diameter
at least. The opening should have a connection to the wall to put inside the outlet pipe and a rose window.
The DSA appliance models, can be installed in both an OPEN expansion VESSEL system (see chapter 3.1) and a
CLOSED expansion VESSEL system (see chapter 3.2).
IMPORTANT: Only after a few days of operation (the time necessary for determining that the appliance is
operating correctly), you can begin to assemble the aesthetic facing. We recommend providing an inspection
door on the counter plate or elsewhere as suitable to provide easy accessibility and visibility of the safety devices
(pressure gauges, valves,..)
3.1.

OPEN expansion VESSEL system

It is COMPULSORY that the OPEN expansion VESSEL system is provided with:
1. OPEN EXPANSION TANK which has a capacity of 10% of total water content of thermo-fireplace 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-fireplace to the upper side of open expansion tank. The minimum diameter of safety pipe is 1" gas.
3. LOADING 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-fireplace 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 installati on 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. 1,5 bar SAFETY VALVE. The exercise maximum pressure which is admitted for the installation is 1,5bar (it
corresponds to 15m water column. Over pressures can cause deformations and breakings of the boiler body.
6. SAFETY DEVICES according to the relevant rule in force.
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
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Focolare 80 Idro Crystal - DSA
6097811 Rev.04 – EN