TECHNICAL FEATURES AND DIMENSIONS
5
The results a complete and perfect combustion with a small excess of air, and uniform heat
charge of the surfaces.
The door has an insulation cord to ensure air-tight closing. The door is equipped with a flange
for burner mounting and an inspection eye for flame inspection.
2.3.
Working medium
The ENP boiler is designed for function with water as working medium, with a maximum
concentration in polypropylene glycose of 50%.
The maximal temperature of the water is 95ºC. The minimal temperature of the return water is
65ºC for nominal decrease of temperature ∆t=20ºC in a device of heat performance.
The boiler is appropriate for open and closed heating systems with maximal operation pressure
4 bars. The maximal operation pressure of the boilers with power bigger than 800 kW is 5
bars.
The quality of the heating plant water is an important element for the performance of the
system. The water that enters the heating plant must be clean, transparent and free from salts
and chemical substances. It must be filtered, so as no quantity of sand or mud from the water
supply comes into the boiler.
The hardness of the water must be within permissible limits. In regions where the water is
hard, it is necessary to use water softeners.
Properties of the water for use:
Appearance: clean-transparent
Total hardness: Max 20ºf
Free oxygen: Max 0,05 mg/lit
Organic substances: Max 0,5 mg/lit
PH: min 8,5
