While most of the time the distance between the controller and pump start relay doesn't create any problems, every once in a while the wires on the 24V coil can allow electromagnetic noise to travel back to the controller. This noise is made when the …

The chattering you hear on a pump start relay is usually caused by insufficient amperage arriving at the relay from the controller.  The first question you should ask yourself is – Did this Relay work for some time before or is this new installation? New …

The PSR-B was developed to provide a solution for irrigation controller and pump start relays installations that have insufficient power to energize the pump relay. A common cause for this problem is the use of too small a wire size for the distance from …

REL 2 is used to allow multiple controllers to operate the same low-voltage device (Master Valve or Pump Start Relay).  IMPORTANT: REL 2 is NEVER connected to high voltage. It is for 24VAC devices, only. Diagrams listed below: … … … Two Controllers With …