La Nordica Focolare 80 Idro Crystal D.S.A [18/76] Closed expansion tank system

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.

Furthermore it must be electrically connected to a thermostat or a electronic control unit that can be purchased with the thermo-

replace as OPTIONAL part.

8. ANTI-CONDENSATION MIXING VALVE – (see chapter 2.3)

ATTENTION: temperature safety sensors must be in place on the machine or at a distance no greater than 30 cm from the ow connection

of the thermo-product. Whenever the thermo products lack a device, those missing can be installed on the thermo product ow 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 re be ignited before the system has been completely lled with water; doing this would

lead to serious damage of the entire structure. The system must be lled by means of the loading pipe directly from the open tank

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 2.3)

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.

5. PUMP CONTROL THERMOSTAT

6. NOISE ALARM ACTIVATION THERMOSTAT

the contrary, if they freeze, the boiler body could break or even explode.

IT IS MA NDATORY that the thermo products for domestic heating inserted in CLOSED Tank heating systems, must be internally equipped,

with a cooling circuit, prepared by the unit manufacturer, which is activated by a thermal safety valve (see chapter 2.4) which does not

require auxiliary power and can guarantee that the standard set temperature limit is not exceeded. Connection between the power supply

unit and the valve must be free from interceptions. Cooling circuit upstream pressure must be at least 1,5 bar.

2.3. ANTI-CONDENSATION MIXING VALVE - (purchased as OPTIONAL)

The Anti-condensation mixing valve nds applications in solid fuel heat generators as it prevents cold water return in the exchanger.

Picture 1 at page 64. Routes 1 and 3 are always open and, along with the pump installed on the return (R), they guarantee water circulation

inside the biomass boiler exchanger (CB). An elevated return temperature, allows efciency improvement, reduces formation of smoke

condensation and prolongs the boiler life span.

FOCOLARE 80 IDRO CRYSTAL - DSA

18 6097811