The SM1 and SM2 programmers from
Drayton Controls are single and twin channel programmers that
are set in a traditional 'peg on wheel' style.
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Drayton SM1 and SM2
Mechanical Programmers
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The SM1 and SM2
are single and twin channel programmers respectively. Utilising the more
traditional rotating time wheel with pegs for settings, these easy to
understand mechanical timers are suitable for use on most domestic pumped
and gravity central heating systems.
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