Vaillant 150 timer instructions

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The product is a 24-hour timer used to time control Vaillant boiler with or without hot water supply. The product is installed at the front of. timeSWITCH 150 boiler pdf manual download. 4 Information on the installation and operation lant boilers with or without hot water supply. The timer isThe timer must be installed by an approved specialist, who is responsible for the observance of the relevant stand- ards and regulations. Operating instructions.