Viega Grundfix Plus Instructions For Use Manual page 37

Grundfix Plus Control backflow trap type 3
▶ Clean the casing.
▶ The seals of the partition walls must be greased with silicon grease.
▶ Install the flaps.
▶ Place the lid on and screw it down.
▶ Open the motor-powered flap by pressing button T2.
▶ Actuate the emergency lock and check it for smooth function.
Handling
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