Product at a glance
A 3-channel programmer giving independent timing of each channel on a 7-day programmer. Designed for use with fully pumped central heating systems, using three separate two-port zone valves. Ideal for the control of two heating zones as well as hot water via separate thermostats and zone valves (e.g. zones 1, 2 and 3 or hot water, heating 1 and 2).
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The above units use the same backplate as H3747 and only requires a simple wiring change