Viega Multiplex Trio E Instructions For Use Manual page 37

Multiplex Trio E fitting, electronic mixing unit
Requirements:
The mixing unit is accessible (e.g. through a revision opening).
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The lid of the mixing unit can be removed.
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A spare battery is available.
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Loosen the screws of the casing cover and retain.
Remove the casing cover.
Pull the plug straight away from the control to disconnect.
Remove the battery from the mixing unit and dispose of properly.
Handling
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