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Central Heating & Storage Heaters Forum
Y Plan / Mid Position Valve - Odd Boiler Behaviour
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<blockquote data-quote="lilman" data-source="post: 289585" data-attributes="member: 793"><p>Hi all</p><p></p><p>Looked at a basic wiring set-up with programmer (dual channel), mid position valve, cylinder stat (no room stat) and Keston boiler. Heating engineer stumped so I had a look. If CH is selected at programmer the boiler fires as it should; when CH is set to off - the boiler remains on? Measured 89V at switched live. I know Honeywell valves 'leak' a bit of voltage - not normally enough for this to happen. Heating engineer had replaced the valve twice. What's occurring?</p></blockquote><p></p>
[QUOTE="lilman, post: 289585, member: 793"] Hi all Looked at a basic wiring set-up with programmer (dual channel), mid position valve, cylinder stat (no room stat) and Keston boiler. Heating engineer stumped so I had a look. If CH is selected at programmer the boiler fires as it should; when CH is set to off - the boiler remains on? Measured 89V at switched live. I know Honeywell valves 'leak' a bit of voltage - not normally enough for this to happen. Heating engineer had replaced the valve twice. What's occurring? [/QUOTE]
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Y Plan / Mid Position Valve - Odd Boiler Behaviour
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