The P170 Series controls employ a set of SPST or SPDT contacts that are opened and closed from pressure actuated bellows. The load-carrying contacts provide direct control of an AC motor within the control's electrical rating. (See P70 electrical rating chart.) Product Specifications BRANDJohnson Controls HIGH PRESSURE DIFFERENTIAL PSIG (KPA)Lockout (Manual Reset) HIGH PRESSURE PSIG (KPA)100 to 500 (690 to 3447) LOW PRESSURE DIFFERENTIAL PSIG (KPA)Min 5 (34) Max 35 (241) LOW PRESSURE PSIG (KPA)20 in. to 100 (-68 to 690) MAXIMUM BELLOWS OVERRUN PRESSURE PSIG (KPA)325 (2241) Low, 525 (3620) High SWITCH ACTIONSPST LIMITED WARRANTY YEARS1
