Important; Operation; Siting; Fitting - Vent-Axia Normal Boost Purge Switch Fitting & Wiring Instructions

IMPORTANT:

READ THESE INSTRUCTIONS BEFORE COMMENCING THE INSTALLATION

OPERATION

The switch allows the user to select between Normal boost and Purge speeds.
Normal (low)

SITING

The Switch must not be installed in a shower cubicle or enclosure. It must be sited away from
direct sources of water spray and out of reach of a person using a fixed bath or shower.
Ambient temperature range: 0 to 40 ° C. Site away from direct sources of heat. Do not site above a
radiator or other heat source.

FITTING

The Normal Boost Purge switch is designed to fit any UK single back box with a minimum depth of
20mm. Fixing centres 60.3mm. A surface mounting box is available (Vent-Axia Ref. 410020).

WIRING

WARNING: For your safety please ensure that the mains supply is isolated before making
electrical connections. The Switch MUST be connected to a 220-240V 50Hz AC single phase
mains supply.
WARNING: The Normal Boost Purge Switch MUST NOT be earthed. It is Class II double insulated.
However, if the switch is mounted on a metal back box the back box should be earthed. If the fan
requires an earth connection then earth continuity must be provided.
All electrical connections should be made by a properly qualified electrician. The siting and
installation MUST comply with the current I.E.E. Regulations (BS7671 UK) or the appropriate
standards in your country.
When using surface wiring that is not contained in conduit, the cables must be securely clipped to the
mounting surface, close to the controller.
Electrical connections depend on the model of unit and the required mode of operation, Also see the
units leaflet for connection details.
Fig 1 shows wiring for units HR200WK & HR200WJ
Fig 2 shows wiring for unit MV250
Fig 3 shows wiring for unit MVDC
Double check the wiring making sure all connections are secure. Fit the Switch to the mounting box with
the two screws provided. Do not over-tighten the screws. Do not trap any wires when fitting the two
pieces together.
Switch the mains supply on and check operation.
All regulations and requirements MUST be strictly followed to prevent hazards to life and property
both during and after installation, and during any subsequent servicing and maintenance
This product should not be disposed of with household waste.
Please recycle where facilities exist. Check with your local authority for recycling advice
Boost (Medium) Purge (High)
2