Automatic Thermostatic Mixer Valve (Optional); Heat Discharge Valve (Optional) - Nordica ITALY Termo - DSA Handbuch

IMPORTANT: temperature safety sensors must be in place on the machine 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.
IT IS MANDATORY that the thermo products for domestic heating inserted in CLOSED VESSEL 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 3.4) 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.
3.3.

AUTOMATIC THERMOSTATIC MIXER VALVE (OPTIONAL)

The automatic thermostatic mixer valve finds applications in solid fuel heat generators as it prevents cold water return
in the exchanger.
Routes 1 Picture 2 and 3 are always open and, along with the pump installed on the return (R), the guarantee water
circulation inside the biomass boiler exchanger (CB).
An elevated return temperature, allows efficiency improvement, reduces formation of smoke condensation and
prolongs the boiler life span.
Valves on the market have different calibrations. NORDICA advises use of model 55° c with 1" hydraulic connections.
Once the valve calibration temperature is reached, route 2 is opened and the boiler water is goes to the system via
the flow (M).
IMPORTANT
lack of installation of the device voids the heat exchanger warranty.
3.4.

HEAT DISCHARGE VALVE (OPTIONAL)

Solid fuel thermo products must be installed with safety devices determined by laws in vigour.
For this reason the thermo stove are equipped with a heat discharge coil.
The heat discharge coil must have one side connected to the water network (A Picture 3) and the other rot drainage
network(C). When the safety temperature is reached, the heat discharge valve, the bulb of which is to be connected
to attachment B, enables the intake of cold water in the boiler coil, discharging the excess heat out of pipe C towards
a conveniently installed drain.
Cooling circuit upstream pressure must be at least 1,5 bar.
A
24
CB
TERMOPRODOTTO
B
3
55°
1
ITALY Termo DSA
M
R
2
Picture 2
7095802 Rev.01 – EN
C
B
A
Picture 3