4
849 Sigma mOD-S USE aND iNSTaLLaTiON iNSTRUCTiONS
TECHNICAL DATA
The technical data specified below refers to the European standards EN 126 “Multifunctional
controls for gas-burning appliances”.
Gas families 2nd, 3rd
Maximum inlet pressure 60 mbar
Ambient temperature range 0 to 60 °C
Storage temperature range -30 to 70 °C
Torsion and bending resistance Group 2
Maximum Humidity 95% RH at 40 °C
Assembly position All positions except upside down
Inlet gas connection Suitable for nut compliant with male G3/4 B ISO 228
Outlet gas connection Suitable for nut compliant with male G3/4 B ISO 228
Pressure test point ∅9 mm
Pressure regulating function
This is obtained by means of the servo regulator type with pressure compensation connection.
Pressure regulator Class B
Minimum gas flow 0.03 m3/h for 2nd family gas (G20)
Capacity @ 5 mbar pressure drop More than 1.6 m3/h (G20)
Modulating function
The pressure Pint is function of the modulator dc current. The reference of the pressure regulator is
the pressure at GAS OUTLET, internally connected.
Therefore the differential pressure across the gas orifice DP (= Pint – GAS OUTLET) is function of
the modulator current, see graph below.
Response time Less than 2 seconds
Maximum modulator voltage @20°C [V]10
Modulator modulator current @20°C [mA]40
Modulator resistance @20°C [W] 176 ± 6%
Offset [mbar] , see Fig. below 4.35 ( cosa - 1)
