Service Inst. Bulletin

1. Locating the Vac-Alert on the common to the pump requires the unit to be adjusted to accommodate all possible vacuum conditions for the different suction circuits plumbed from the pool, spa or pool/spa combo. This can de-sensitize the Vac-Alert to the vacuum levels present on the main drain line, the very suction circuit we are trying to protect. Locating the Vac-Alert on the main drain line allows the SVRS unit to be adjusted to the vacuum conditions present in the main drain suction line; thereby, optimizing the Vac-Alert for maximum bather protection against suction entrapment.

2. Locating the Vac-Alert on the common to the pump makes the unit more vulnerable to false trips due to suction conditions created by vacuum lines or skimmers used as vacuum ports. Locating the Vac-Alert on the main drain line with an isolation valve on the main drain suction line between the SVRS unit and the pump, allows the operator to isolate the main drain line when the pool is being vacuumed.

3. Some suction systems prime with difficulty as a result of pipe leaks or worn out pump impellers. Locating the Vac-Alert on the main drain line reduces the possibility of the Vac-Alert contributing to a pump priming problem.

In summary, we all need to promote the proper installation of SVRS units. This means following the manufacturer’s instructions, and not following alternative installation procedures.