GRANT Air Source Heat Pumps

[Electrician]

I install 25Kw heatpumps on single phase working on 32 amp mcbs with not a single problem, 300 amps sounds completley wrong to me

It would be interesting to know what make these are....

 

[unguided1]

It would be interesting to know what make these are....

PMd the details to comply with forum rules

 

[unguided1]

yes it does have what they call a BTC controller which is located within the ASHP

here is the link to the installation guide the BTC controller you can see on page 44

http://www.bhl.co.uk/images/tagged/...rce Heat Pump Installation and User Guide.pdf

but surely if that was upsetting the system their engineers would have disconnected it??

I would suggest that you get them to completely disconnect the BTC controller then run it up and check the pump again it could be a rogue BTC that is playing up

 

[Electrician]

I would suggest that you get them to completely disconnect the BTC controller then run it up and check the pump again it could be a rogue BTC that is playing up

I have no idea how the internal controls work as I have not dealt with them at all but I may suggest that when/if they come back...

 

[unguided1]

The BTC controller is basicly a setpoint controller allowing the heatpump to run in different parameters and different temps so you will find that the heat pump is running in its normal parameter in heating mode, but when its in domestic hot water mode it will be running completly outside its parameters.

I do not know how this stands with EN14511 and I have my doubts about the COP claim of 5.8 when its working on hot water mode, but I bet that its the BTC is the problem

 

[unguided1]

so have grant been back and was it btc

 

[Electrician]

so have grant been back and was it btc

in a word no.... I sent them an email with the results from the electricity monitors on Tuesday morning.... still awaiting a response...

 

[unguided1]

Blimey, probably awaiting a response from their experts in china then

 

[Electrician]

Blimey, probably awaiting a response from their experts in china then

LMAO more than likely unless it's delays in Japan due to the tsunami they are supposed to be a British product I thought??
but still waiting for a response well the customer gave them 10 working days to get it sorted which gives them to the 15th of this month my guess is they will be coming out on the 18th.....

 

[unguided1]

Nah yer can see its a chinese pump but if the last component is fitted in the uk then they can say made in the UK, probably the legs!!!