The Heat Pump Relay Kit once installed into a Balboa Spa Pack enables you to connect a third party Heat Pump to your system. 

Suitable for BP2100 & BP601 series Spa Packs.

Can be setup to have the Heat Pump run instead of the Pack's electric heater or at the same time/simultaneously.

But the Heat Pump is not integrated and CANNOT be controlled from the Topside controller. It would require setting via its own controls.

The Heat Pump must have its own flow detection.

Full installation instructions can be downloaded from this page.

PLEASE NOTE: It is always advisable to get a trained electrician or experienced tradesman to install as incorrect wiring may cause damage to equipment or injury.