BM A Class 2016 Install. - Boiler pump constantly running.

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BM A Class 2016 Install. - Boiler pump constantly running.

Post  p4ulg on Wed Nov 29, 2017 1:50 am

Hey All,

I have a BM A Class 0v 180 that was installed by the previous owners in May 16 to repace an older faulty one.

The handover they gave us was leave both switches on constant rather than timed and just use the room thermostat to control the heating..

Upon looking last night at the wiring of the Nest Thermstats I noted that the boiler pump is running constantly even when there is no call for heating nor hot water.. I monitored it for a few hours last night and it ran constant. As it's a hybrid UPM3 pump type with LED on the front I can see that it was running at full capacity constantly.
I would have assumed as this is a thermal store that it would only run when it was called upon to fill the tank..
The wiring to be honest is a disgrace.. they have ran 4 lots of 3 core flex from the Power blocks into a enclosure that has the worst connector block nest I have evern seen and then got cables connecting into that from the original house wiring.. There is all 1.5mm and no the specified 6mm cable and the heating element is not wired up either..

So back to the Boiler pump running constant. Should this actually be runnign constant or not ?

Checking the sensors for Actual and then the point settings I have the following.
The book only shows upto s6 however.. so only the S6 one is way off which is the

S1 - ACT77 - SET77
S2 - ACT77 - SET77
S3 - ACT44 - SET44
S4 - ACT51 - SET50
S5 - ACT78 - SET78
S6 - ACT76 - SET56
S7 - ACT86 - SET86

Any ideas anyone ?

p4ulg

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Join date : 2017-07-01

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Re: BM A Class 2016 Install. - Boiler pump constantly running.

Post  p4ulg on Wed Nov 29, 2017 4:00 am

Well put in a call to the premium rate number and got some great help from Chuck on the other end..
Seems I have a error 29 and it coudl be software related.
They are sending someone out to check the wiring and look at the fault..
So far the assistance has been great other than the premium rate but will keep you updated...
Looks like I got a made to order unit as it has 12 digit serial number so good news there at least..

p4ulg

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