Deleted
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Post by Deleted on Nov 2, 2018 20:32:55 GMT
Two of my jobs today were, a kitchen rad stone cold and the next job a bathroom rad stone cold, guess what it was ?  |
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Astra
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Post by Astra on Nov 2, 2018 20:36:13 GMT
Sticky thermo rad valve !!!!!!!!!!!!
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Post by Deleted on Nov 2, 2018 20:40:09 GMT
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Post by rocketmanbkk on Nov 3, 2018 6:14:02 GMT
In & out then or new valves?
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Post by crowsfoot on Nov 3, 2018 7:43:34 GMT
I had the opposite PB yesterday, a customer who wants the central heating on but no hot water! What a frustrating job I've had trying to explain that the system (like most) prioritise the hot water circuit over the central heating and the heating won't come on until the hot water demand is satisfied. My heads still in a spin this morning from it all!  |
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Post by Deleted on Nov 3, 2018 9:52:33 GMT
In & out then or new valves? In & out rocky I just freed the pins off. greensmilies-010 |
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Post by rocketmanbkk on Nov 3, 2018 10:09:23 GMT
I had the opposite PB yesterday, a customer who wants the central heating on but no hot water! What a frustrating job I've had trying to explain that the system (like most) prioritise the hot water circuit over the central heating and the heating won't come on until the hot water demand is satisfied. My heads still in a spin this morning from it all! The want the heating on but they don’t want the hot water to be heated at the same time? Isn’t that what a programmer is for? |
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Post by tomplum on Nov 3, 2018 12:20:26 GMT
a modern Y plan or S plan should do that if its wired and working correctly and the custerd knows how to set it, I've seen loads thast are wired wrong and no one ever noticed, So I don't bother explaining,
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Post by Deleted on Nov 3, 2018 14:41:08 GMT
Older systems had a diverter valve rocky which looks the same as a mid-postion but can only do one job at a time as it's either on hot water demand or heating demand, the modern mid-postion valve can do both.  as also said depending on whether BB has wired it up.  |
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Post by crowsfoot on Nov 3, 2018 18:02:05 GMT
It was an Air source unit coupled up to an unvented cylinder. Two pumps, two 2 way diverter valves, one for each circuit. Custard had switched the heating on at 5 O'clock in the morning on the programmer, but the hot water (which was stone cold) was switched off on the programmer. Anyway, the AS unit wasn't the slightest bit interested in "whirling on" on this program setting so I switched the hot water on to the H/W setting at the programmer the H/W MV moved and the unit fired up. I returned 3hrs later (last thing) and the hot water was now satisfied and that MV had now closed, whilst the heating MV had by now opened up and the heating system was just staring to warm up (albeit too late for me carry out my job which was to balance up the 10 rad system). I'm far from an expert on how these units are wired, however, I know most ch systems do prioritise the hot water circuit. Thinking on, it could possibly be a wiring fault I suppose because the programmer had allowed the custard to do. Air source is regarded as a "poor heat source" it's all very "slowly slowly catchy monkey" and won't do two circuits at the same time and needs to be on for long periods (upside is it's cheap to run). What do you think? I could get the Mitsubishi engineer to check on it (at a cost), (you've put a doubt in my mind now  ). |
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Post by battle1066 on Nov 3, 2018 18:35:56 GMT
It was an Air source unit coupled up to an unvented cylinder. Two pumps, two 2 way diverter valves, one for each circuit. Custard had switched the heating on at 5 O'clock in the morning on the programmer, but the hot water (which was stone cold) was switched off on the programmer. Anyway, the AS unit wasn't the slightest bit interested in "whirling on" on this program setting so I switched the hot water on to the H/W setting at the programmer the H/W MV moved and the unit fired up. I returned 3hrs later (last thing) and the hot water was now satisfied and that MV had now closed, whilst the heating MV had by now opened up and the heating system was just staring to warm up (albeit too late for me carry out my job which was to balance up the 10 rad system). I'm far from an expert on how these units are wired, however, I know most ch systems do prioritise the hot water circuit. Thinking on, it could possibly be a wiring fault I suppose because the programmer had allowed the custard to do. Air source is regarded as a "poor heat source" it's all very "slowly slowly catchy monkey" and won't do two circuits at the same time and needs to be on for long periods (upside is it's cheap to run). What do you think? I could get the Mitsubishi engineer to check on it (at a cost), (you've put a doubt in my mind now ). I find the most common problem is the programmers DIL switches (which you normal set up before securing it to the wiring base unit) are incorrectly set for what the system can do - you can have it linked or independent, meaning (linked) hot water and heating on together but both controlled by there indervidual thermostats which activate the zone valve or independent and controlled by the programmer and the circuit thermostats. |
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Post by crowsfoot on Nov 3, 2018 19:42:13 GMT
The custard did keep saying to me that a neighbour with the same system the heating works with the hot water programmer in the off position. You know right or wrong I'm leaving it the way it is, I can't see nothing wrong in the custard always having a nice tank full of cheap hot water! If the Mitsubishi engineer gets brought in then says there's nowt wrong with it! £200.00 call-out fee please.....I'm then the one with the egg on my face  ! I'll keep us al informed of any new developments. Tappy, |
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as also said depending on whether BB has wired it up. 
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