Acl switchmaster sm400 manual

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4 Apr 2018 Switchmaster SM400 24 Hour Mini Central Heating Programmer Used for about one year before Ideal replacement if you need a like for like fix.OBSOLETE - Programmer, Switchmaster SM400 TM3021 in Domestic Heating Controls Drayton. anyone out there have and use Switchmaster 400 central heating controls? Mine is of the type with one manual switch for 'timer', 'off' and Replacement. Invensys. SM2 Drayton. Tempus 3,4,6 & 7 (Old). N. L. 1. 2. 3. 4 yes. Lifestyle. 112, 241, 522 & 722. N. L. 1. 2. 3. 4 ACL Switchmaster. SM 300 17 Feb 2013 into a flat that has switchmaster 400 timer for the heating and no instructions. They call it the Switchmaster SM400. IIRC it plugs onto a standard Drayton backplate so you can fit pretty well any Drayton or ACL programmer, 26 Apr 2015 Hi - I've bought a house with a Switchmaster 400 controller, with a seperate dial thermostat, connected to a baxi bermuda back boiler. The control is a Switchmaster 400 which I have been told is now obsolete . Your best bet for instructions would be to contact Drayton Controls! 21 Oct 2011 Discuss drayton sm400 switchmaster in the Central Heating Forum area at Switchmaster Boiler Wall Programmer SM400. regulations. Maintenance. No user maintenance should be attempted. N. L. 1. 2. 3. 4. SM300. ON. COM. WALLPLATE CLOCK. N. L. 1. 2. 3. 4. SM400. CH. ON.