MSZ GB50VA Requires a 25Amp BS88 Fuse?

[kindanice]

Can some please clarify the following for me: A Mits MSZ GB50VA apparently requires a 25Amp BS88 fuse. I was intending to fit it to a 20AMP MCB, as this appears sufficient to me.
I called the Mits technical helpline, and was informed that if I don't connect it to a 25AMP BS88 fuse it would void the warranty??? I think this is a nonsense as to how it would void the warranty, but would anyone kindly confirm whether a 20Amp B type MCB would be okay?

[Electrocoolman]

I don't know where the 25A came from.

Looking at www.orionairsales.co.uk/mitsubishi-electric-msz-gb50va-wall-mounted-50kw--17000btu-inverter-233-p.asp

it says it requires a 16A HRC fuse, so your 20A MCB might be over generous.

I would try a 16A MCB (B curve) first of all....if you experience tripping you could then try changing to a C curve. Its only got a starting and running current of 5A so I doubt that you should have problems. A lot of these small inverter units will happily run on a 13A spur.

Don't forget an outside isolator switch.

[kindanice]

Thanks for the reply, but the Mits website and tech support say different to your link (i tried pasting the link but it won't let me because i am new to here)
I will go ahead with the type B 20amp mcb, and thanks again.

[sinewave]

A 20A MCB will be fine for a MSZ-GB50VA.


We recently installed 5 MSZ-GA71VA where 5 R22 6kW panasonics had been.

The existing supplies were run in 2.5mm SWA and fused at 16A! :rolleyes:

Just outa curisoty we left them as is and 1 year later there have been no problems with overcurrents.


Most A/C manufactures way overstate elctrical requirements.


Your better looking at the min & max amperage draws on the pdf spec sheets.

:cool:

[Brian_UK]

Remember also that the fuse/mcb is there to protect the cable not the item of equipment at the end of it.

[Zigzag]

The max running current of the model 50 is 16amp so a 20amp would be the minimum you would fit