Description
The Johnson Controls P29NB-1 is an ideal Pressure Control Switch which has a time delay integrated into it and is suitable for pressure control in HVAC systems. At the time when the pressure on the spring reaches the defined quantity, the P29NB-1 triggers a 60-second time interval. This delay rules out high frequency switching and allows the system to gain equilibrium before commencement of a switch action. It is of, switch means it may control two different circuits considering the pressure condition. For instance, it may begin a pump at a particular pressure and thereafter give an alarm after 60 seconds if the pressure rises further.
