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2 x Mitsubishi Zubadan 14kW ASHPs in 400sqm house

 
Air Source Heat Pumps (ASHPs)
Last Post by AlanB 3 years ago
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 AlanB
(@alanb)
Trusted Member Member
Joined: 4 years ago
Posts: 20
Topic starter 06/03/2022 8:30 pm  

Hi Everyone

I'm Alan and new to the forum.

I live with my wife in largish detached house in the Chilterns ( 400m2 ). House mixture of old solid walls ( 15% ) and modern cavity insulated. Around 200mm in the lofts. Double Glazed throughout.

We have

2 x Mitsu Zubadan 14Kw ASHPs controlled by an Ice Energy bastardisation of 2 FTC2s in their own bespoke step controller set up.

100l buffer tank in loft.

300l pressure tank in airing cupboard MacDonald Engineers.

Installed in 2011.

GF mostly UFH 4 zones controlled by a heat miser set up.

FF rads controlled by TRVs and a conventional programmable thermostat.

Looking to add PV plus battery this year and to find any way I can to cut our consumption.

Current predicted annual total elec usage is around 40000 Kwh !! No idea what usage is for the heat pumps alone.

Outdoor pool heated for 3 months a year by a 12kw Calorex ASHP. Pool highly insulated sides and bottom. Thermal cover on top.Works very well for June July Aug.

Ice Energy were poorly run company it seems and disappeared around 7 years ago from memory.

So, I'm struggling with my settings on the controller, to get the best our of the system.

Have upgraded all the external pipework insulation to Armorflex.

 

Any suggestion grateful received.

Cheers

Alan 



   
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 greekgoddj
(@greekgoddj)
Trusted Member Member
Joined: 4 years ago
Posts: 20
06/03/2022 9:00 pm  
Posted by: @alanb

No idea what usage is for the heat pumps alone.

My suggestion is to fit aShelly EM unit on your system as I have done and you can see exactly what is used by what. I have one clamp measuring the entire house usage and another specific to the ASHP.

94D54E2E FC43 4B06 99EF 6858E99BC51B
9FBB186F DA8B 4C85 9297 3DB5113CB89B

Mitsubishi Ecodan 11.2kW ASHP


   
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 AlanB
(@alanb)
Trusted Member Member
Joined: 4 years ago
Posts: 20
Topic starter 08/03/2022 1:37 pm  

@greekgoddj Thanks for your reply.

Had a quick look at the guide on line. So, do I mount the Shelly EM  near to the heat pumps and put a clamp around the cable leading to each heat pump? 

Does each clamp have to be wired to the main EM unit?

Any help you can give gratefully received.

Thank you

Alan



   
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 greekgoddj
(@greekgoddj)
Trusted Member Member
Joined: 4 years ago
Posts: 20
08/03/2022 1:55 pm  

Hi @alanb 

The clamps go around the live electric feed in your fuse box that feeds the ASHP. 

I used this video as a guide

Obviously take great care when doing anything electrical!

 


Mitsubishi Ecodan 11.2kW ASHP


   
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 AlanB
(@alanb)
Trusted Member Member
Joined: 4 years ago
Posts: 20
Topic starter 08/03/2022 2:20 pm  

@greekgoddj Ok. I'll see if I have enough room to put the clamps around each feed. 

Thank you 

AlanB



   
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