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Showing results for tags 'controller'.
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My Honeywell CM907 controller has finally died (LCD screen). Can anyone recommend a good replacement option? I still have to decide whether I want a wired and fixed controller, or a wired base and WiFi controller. It is gas fired with ufh. Thanks Ferdinand
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Guys A bit of a post as a "heads up". I was fitting my replacement controllers today (both my Sunamps are being replaced, a story for another day) and nearly forgot to do something pretty fundamentally important. The reason for this post is that I could easily see a busy plumber/sparky/installer completing missing this. Let me explain firstly with some pictures. Here's the controller as supplied by Sunamp: For simplicity I've removed the lid and the earthing fly lead which is screwed to the back panel (you can see the screw just below the contactor bottom right). Then here's the wiring diagram which is on the back of the lid and also printed in the manual: So as per the title the thing we need to be focusing on is earthing. You will note that the diagram shows the earthing connection across the three live blocks and then back (assumably to the case?) BUT and it's a BIG but. Look again at the controller image the earth wiring is NOT there. Nowhere in the manual does it tell you that its your responsibility to make these connections for the earthing. As far as I can see if you were to fail to make these connections the Sunamp unit itself and the controller case would not be earthed.
