BPC Vent-Axia Integra Installation And Wiring Instructions page 8

Fig.3 Summer Bypass/ Extract Only Switch (409999 NOT supplied)
Where an extract only switch is to be used the blue wire for the supply motor needs to be
connected to the switch as shown. The L, N1, N2 and E terminals should be connected as per
the relevant Fig.2. After installation ensure that with the switch set to extract only that there is
no supply airflow.
Note: If the summer bypass is used without the 150VA transformer the unit will run at boost in
trickle and boost setting.
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