Question about Heating & Cooling
Hi need help installing a honeywell st9400c have two outgoing cables to motorised valve and pump maybe?also an emersion heater upstairs, one cable is standard black red and earth and second cable is red,blue,yellow and earth so need to know what wires go were on terminal board please as cant fathom what system/wiring diagram should follow. any colour pictures correct wiring would be great please or some help thanks
One of these wires is contains permanent live, neutral and earth. The other wil be heating on and hot water on, the earth on this wire will probably not be used.
you will have to trace the wiring back or test it!! Be carefull!!
Posted on Nov 04, 2010
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Posted on Jan 02, 2017
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