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Thermal safety
valve 95° C
AUTOMATIC THERMOSTATIC VALVE
The automatic thermostatic mixing valve fi nds applications in solid fuel boilers as it prevents cold water
return in the exchanger.
Routes 1 and 3 are always open and, together with the pump installed on the return, they guarantee water
circulation inside the biomass boiler exchanger.
A high return temperature allows effi ciency improvement, reduces formation of smoke condensation and
prolongs the boiler life span
Valves on the market have diff erent calibrations. Extrafl ame advises use of model 55°c with 1" hydraulic
connections. Once the valve calibration temperature is reached, route 2 is opened ad the boiler water goes
to the system via the fl ow.
N.B. lack of installation of the device voids the heat exchanger warranty.
INSTALLATION AND SAFETY DEVICES
Installation, respective plant connections, commissioning and correct functioning check, must be carried
out buy professionally authorised staff (M.D. 22 January 2008 nr. 37), in compliance with the regulations in
force, both national and regional, as well as with these instructions.
Extrafl ame S.p.A. declines all responsibility for damages to objects and/or persons caused by the
plant.
HYDRAULIC PLANT CONNECTION
3 bar safety valve Thermometer
Manometer
Expansion
Vessel
Pump
1
Load
Network
fi gure 4.4
Chapter 4
Flow
Balance Valve
3
2
Return
21
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