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6.5. DHW and UFH
In this case the DHW takes priority over the under floor heating. It is more important to have DHW than space heating, so until the water is up to
temperature (45°C), the system will control to the DHW set point. This may mean that water slightly hotter than 45°C being applied to the under
floor heating system for a period of time.
•
The system will operate as in 6.2, with the system being controlled from T1 until the set point has been achieved.
•
After which point the UFH signal (T2) will take control as in 6.3.
•
If using DHW with IH signal output; once DHW is heated to 45°C, IH will come on and stay on until 60°C at the same time UFH signal (T2) will take over.
6.6. DHW and UFC
The same priority takes place with DHW and UFC, DHW is more important than UFC.
•
The system will operate as in 6.2, with the system being controlled from T1 until the set point has been achieved.
•
After which point the UFC signal (T3) will take control as in 6.4.
•
If using DHW with IH signal output; once DHW is heated to 45°C, IH will come on and stay on until 60°C at the same time UFC signal (T3) will take over.
6.7. UFH and UFC
Both will work when independently required. If both modes are requested simultaneously there will be NO operation.
7. Initial setting and test run
See PQFY manual for commissioning and testing.
