Operation and Maintenance Manual, OnyX Sky Heat Recovery Units, 2022/01
Frapol Sp. z o.o. reserves the right to introduce changes without any prior notice.
Page
30
5.6.5
Electrical wiring diagram of the controller board
Protections:
F1 - HRU protection
F2 - controller protection
F3 - reheater
F4 - pre-heater
F5 - exhaust air fan
F6 - supply air fan