138 SWITCHES PRESSURE SAFETY PRESSURE SWITCHES Subgroup 440 Minimum and maximum pressure switches with manual reset for heating systems APPLICATIONS Safety pressure switches for heating systems applications, PED certified. The devices automatically stop the heat generator when a pre-set water pressure limit is reached. CODE PH Setting range [bar] Factory setting [bar] Connection IT PMR 5 R2 1 2 - 4,5 3 1/4"F IT LPR 5 1 0,5 - 1,7 0,9 1/4"F Code: IP PMR5 R2 Code: IT LPR 5 TECHNICAL FEATURES Membrane EPDM with insert in PA (nylon). Electric contact PMR5 normally closed double electric contact LPR5 normally open contact Fluids controlled 5°C÷50°C Protection degree IP 44 Rated current 250V Cable glands included Reset is exclusively manual by pressing the reset button once the pressure has returned by at least 0.4 bar below the set shutoff value
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