Orcon 22001090, Руководство по установке

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6.4.Adjusting drain valves
The exhaust valves are not zoned. After the supply valves in both zones have
been calibrated, the extract valves must be calibrated over the entire house.
Set the HRC to position 3 so that both zone valves on the supply air open. Measure
the total air quantity on the exhaust valves and check whether you are exhausting
enough air per room according to the ventilation calculation made.
Make sure that there are sufficient overflow facilities in the house to allow the air to
escape.