The unit is delivered with two water seals: a Vallox Silent Klick water seal that has an air lock and a more compact water seal that has not. Installation instructions for the water seal are enclosed with the packaging, and can also be found online at www.vallox.com.
When the installation method with no air lock is used, an air lock must be installed somewhere else between the extraction pipes (the parts needed are included in the accessory bag). The air lock ensures the removal of condensing water and muffles any noise.
When the alternative installation method is used, the ring seal and the locking part must be moved to the pipe connection part that is mounted on the wall.
Water must at all times be kept out of the electrical system.