NuTone Relay Board CV350 / CV352 / CV353 / CV400 / CV550 / CV553

Read about the NuTone Relay Board 0521b000

NuTone Relay Assembly for CV350, CV352, CV353, CV400, CV550, and CV553. Designed to fit Nutone Central Vacuums CV350, CV352, CV353, CV400, CV550, and CV553. All of our NuTone motor assemblies/circuit boards are genuine and brand new. If you are unsure which relay board will work best for your system then, give us a call today at 1.800.322.2965.

For use with models: CV-350, CV-350C, CV-353, CV353C, CV-400, CV-400C

Warning: Disconnect electrical supply before servicing unit. Failure to do could result in serious injury or death. Disconnect old lead wires and reconnect per the wiring diagram below.

The relay assembly you are replacing may not have the same appearance as the new assembly.
Please note the following changes:

1. The blue power lead wire has been changed to a black lead wire.
2. The red lead wire connected to the switch has been changed to a yellow lead wire.
3. For models manufactured after May 1997, two additional yellow lead wires are provided. If your power unit was manufactured prior to May 1997 and if these lead wires are not used, remove each lead from the terminal connection.