Xpelair Xcell 400 QV, Installation And Operating Instructions Manual

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7.13 Main MVHR PCB (Xcell 400 QVI model only)
The diagram below shows the additional factory installed wiring connections made to the main MVHR control PCB.
Access to this PCB is not necessary under normal operating conditions, however should a fault develop see section
10.3 for details of how an qualified service technician may access this PCB within the MVHR.
8 Controller Functions
8.1 Manual 2-speed switch (Xcell 400 QV model only)
The terminal box for all wiring connections is situated on top of the MVHR. Refer to section 7.1 for the relevant wiring
diagram. Only one Manual 2-Speed Switch may be connected to each MVHR.
Minimum size of 3-core cable to be used for switch connections: 0.5mm².
This switch option is for manual control only and therefore none of the Xpelair automatic control accessories listed
below are compatible with this switch.
Speed settings:
Speed 1: Normal operation
Speed 2: Boost setting for increased air exchange
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Refer to Section 6 for details on default speed settings / adjustment.