Freeze protection measures prevent damage to the system due to the expansion of freezing transfer fluid. ... This approach is common in climates where freezing temperatures do not occur often, but is somewhat unreliable since the operator can forget to drain the system.

How does freeze protection work?

Freeze Protection Units allow pool and spa owners to set a desired temperature where their pump and heater will automatically turn on. Once the climate drops to the specified temperature, the Freeze Protection Unit kicks in. It turns on your pump and heater to keep the water moving, which prevents freeze expansion.

What is freeze protection in a solar water heating system *?

What is freeze protection in a solar water heating system? Explanation: Freeze protection in a solar water system prevents the system being damaged due to freezing of transfer fluid. It does not prevent the operation of drainback system.