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Questions and comments about annual heat pump maintenance and servicing

KundK · 2022-12-02T11:37:42Z

Do I need to order a yearly maintenance to keep RHI? The annual declaration has only asked if my installation is in good working order. Or is it required for the manufacturer's warranty? And if it's mandatory, can I call someone else than my original installer? I've called our installer, Greener Living, about two dozen times. They have promised a call back every time and I still can spend my £160 with them to have a look at my system. :( I'm getting frustrated. I'm not sure is a different local installer would be more willing, but I'd give it a go if won't lose anything. (Although considering how "easy" to get a plumber, maybe just wasting my energy)

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Air Source Heat Pumps (ASHPs)

Last Post by ASHP-BOBBA 1 year ago

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HughF

(@hughf)

Honorable Member Member

Joined: 4 years ago

Posts: 489

12/12/2022 6:23 pm

Posted by: @editor

↑

As part of your services, did they check the refrigerant levels?

I don't think that checking refrigerant levels is common practice for annual servicing but given how important it is to the heat pump, I wonder why it's not checked.

it’s very difficult to measure the charge, it is weighed in when filled at the factory. And there aren’t anywhere near enough f gas qualified technicians. That’s why everyone fits monoblocs.

Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.

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Derek M

(@derek-m)

Illustrious Member Member

Joined: 5 years ago

Posts: 4425

12/12/2022 8:30 pm

Posted by: @hughf

↑

Posted by: @editor

↑

As part of your services, did they check the refrigerant levels?

I don't think that checking refrigerant levels is common practice for annual servicing but given how important it is to the heat pump, I wonder why it's not checked.

it’s very difficult to measure the charge, it is weighed in when filled at the factory. And there aren’t anywhere near enough f gas qualified technicians. That’s why everyone fits monoblocs.

I remember watching an American video some time ago, where the Technician measured either temperatures, pressures or both on the heat pump unit, that indicated if there was sufficient refrigerant gas in the system.

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KundK

(@kundk)

Eminent Member Member

Joined: 5 years ago

Posts: 19

Topic starter 12/12/2022 8:50 pm

Well, these days practically any garage can fill air conditioners in cars. Therefore drain, measure and fill gas in them.

It's surely not that complicated.

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HughF

(@hughf)

Honorable Member Member

Joined: 4 years ago

Posts: 489

12/12/2022 9:24 pm

Posted by: @derek-m

↑

Posted by: @hughf

↑

Posted by: @editor

↑

As part of your services, did they check the refrigerant levels?

I don't think that checking refrigerant levels is common practice for annual servicing but given how important it is to the heat pump, I wonder why it's not checked.

it’s very difficult to measure the charge, it is weighed in when filled at the factory. And there aren’t anywhere near enough f gas qualified technicians. That’s why everyone fits monoblocs.

I remember watching an American video some time ago, where the Technician measured either temperatures, pressures or both on the heat pump unit, that indicated if there was sufficient refrigerant gas in the system.

Yea, you can do it by measuring the temps and pressures at certain points of the system. Then you calculate what the correct values would be for the factory gas charge. Or at least I think that’s what you do.

Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.

ReplyQuote

Tufty

(@tufty)

Trusted Member Member

Joined: 3 years ago

Posts: 54

25/01/2023 10:44 am

Hi,

Im looking to have my ASHP serviced and looking around for prices. Ive been quoted £250 (plus vat) for a service. Does that sound about average?

Also, how long are Mitsubishi ASHP parts warranty for? 5 years?

Thanks

ReplyQuote

Mars

(@editor)

Illustrious Member Admin

Joined: 5 years ago

Posts: 4550

25/01/2023 10:52 am

@tufty, have a look above in this thread. Your price is about average for a one-off visit. Warranties on heat pumps aren’t clear - other Ecodan owners may have insights.

Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!

👍

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Brooster

(@brooster)

Active Member Member

Joined: 4 years ago

Posts: 15

25/01/2023 11:01 am

My standard Ecodan warranty was 3 years from commissioning date and installer suggested I buy extended warranty (which I did) to cover 7 years

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AllyFish

(@allyfish)

Prominent Member Contributor

Joined: 4 years ago

Posts: 518

25/01/2023 11:25 am

@hughf refrigerant charge quantity is critical. The best place to charge the unit is in the factory when built, where equipment is calibrated and controlled and very thorough leak detection can be carried out prior to charging. Monoblocs have a very small refrigerant quantity requirement and, because they are outside, flammable refrigerants such as R290 propane can be used rather than R32. Many ASHP service engineers who have transitioned from the Gas Safe fired boiler side of the heating industry won't be F-Gas registered, so cannot touch a monobloc refrigeration circuit. Every time a refrigerant manifold is connected to the HP and LP sides, and then disconnected, there's a slight refrigerant vapour loss.

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HughF

(@hughf)

Honorable Member Member

Joined: 4 years ago

Posts: 489

25/01/2023 11:36 am

@allyfish your point being?

Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.

ReplyQuote

HughF

(@hughf)

Honorable Member Member

Joined: 4 years ago

Posts: 489

25/01/2023 12:04 pm

Posted by: @kundk

↑

Well, these days practically any garage can fill air conditioners in cars. Therefore drain, measure and fill gas in them.

It's surely not that complicated.

Completely different set of regulations covering the automotive application of F-gas…. So different that you don’t need to be f-gas registered to work on automotive AC systems.

Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.

ReplyQuote

Kev M

(@kev-m)

Noble Member Member

Joined: 5 years ago

Posts: 1276

25/01/2023 12:23 pm

Posted by: @tufty

↑

Hi,

Im looking to have my ASHP serviced and looking around for prices. Ive been quoted £250 (plus vat) for a service. Does that sound about average?

Also, how long are Mitsubishi ASHP parts warranty for? 5 years?

Thanks

Mine is 5 years if serviced every year.

👍

ReplyQuote

Tufty

(@tufty)

Trusted Member Member

Joined: 3 years ago

Posts: 54

04/02/2023 10:51 am

@mjr I dont suppose you know if there is an online record anywhere of the service history? My (now ex!) partner was responsible for getting the ASHP serviced (while I focused on everything else involving a full property renovation).

I cant find a 'commissioning document', but I do have a Handover document, although no mention of service history.

I guess - if I cant find a record of annual services performed - it will void my Mitsubishi warrantee. Will it also impact on my RHI payments? Im really concerned now.

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