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Post by rocketmanbkk on Aug 1, 2018 13:29:44 GMT
So this chap says his heating won’t come on.
Said it’s the 2 port.
Went there, demanded heating & the arm doesn’t move. I said, there’s your issue.
He then is adamant that that’s correct. He then said it needs moving manually!!!!
Craziness
Anyway as it’s summer I said no rush.
So, to tests a 2 port, turn demand on & the arm should move? Manually push it over when demand is on & it stays on with no resistance if you push it back?
Anything I’m missing?
Cheers all
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Post by tomplum on Aug 1, 2018 16:07:42 GMT
that suggests to me that, whoever put the heating in wired it wrong and could not recify it so told the man, he has to move it manually, You are right in thinking it should happen automatic when demand is on, So my question is why does he want it changing if he's happy to manually do it ?  |
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Post by boilerdoktor on Aug 1, 2018 16:45:40 GMT
Rocket man , check for 230v at brown, that powers the motor open, then grey is perm live, then check you ve got 230v on orange to pump and boiler.
it might be a faulty clock or stat
you Can sometimes change just the motor
when its working correctly it should be loose as you say and stiff if there’s no demand
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Post by rocketmanbkk on Aug 1, 2018 17:31:08 GMT
that suggests to me that, whoever put the heating in wired it wrong and could not recify it so told the man, he has to move it manually, You are right in thinking it should happen automatic when demand is on, So my question is why does he want it changing if he's happy to manually do it ? He’s in his 70’s now & the heating 2 port is under the floor! |
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Post by dickpuller on Aug 1, 2018 20:56:34 GMT
If it’s an S plan, the ch valve works in series with the programmer & Room Thermostat, so in simple terms, just like a light switch, the programmer calls(switches) for central heating, it sends a 230vac signal to the Room Thermostat, if the amibant temperature in the room is below the set temperature it sends the 230vac signal on(switches) to the Brown at the zone valve(2 port). The ch 2 port valve has a synchron motor, that motors the valve open when a 230vac signal is received(via the Brown wire), opening the valve it makes a micro-switch & it switches a perminant live supply to the boiler/circulation pump.
A good synchron motor will have an ohmns resistance of around 2000-2500ohmns.
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