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Thread: Mitsubishi VRF Replacement
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14-02-2012, 11:58 AM #1
Mitsubishi VRF Replacement
Hi Folks
I have a project to replace serveral Mitsubishi PURY P250 YMF C condensers with the new PURY RP 250 YJM-B condensers.
But my question is can we reuse the older series indoor units?
Mitsubishi seem very non-committal of the subject.
Has anyone got any experience of doing this?
Regards
Danny
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14-02-2012, 10:03 PM #2
Re: Mitsubishi VRF Replacement
All the replace systems I have commissioned so far have indoor units replaced to match R410a outdoor unit.
YMF-C was R407c with large glide & lower operating pressure than R410a
I suspect the indoor unit control stratagy was specific to R407c refrigerant
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14-02-2012, 10:55 PM #3
Re: Mitsubishi VRF Replacement
I appreciate the different gases and the perhaps different indoor coils but would it be feasible to change the indoor PCB's to allow the change of gas type? [Just thinking out loud]
Brian - Newton Abbot, Devon, UK
Retired March 2015
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15-02-2012, 06:46 PM #4
Re: Mitsubishi VRF Replacement
I wouldn't recommend 407 equipment to run on 410 that's for sure
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15-02-2012, 11:09 PM #5
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15-02-2012, 11:14 PM #6
Re: Mitsubishi VRF Replacement
mitsi mr slim indoors have a spare suction flare nut and it states for 22,407,410 ?? universal- i always swap the complete unit-as any old indoor is gonna have a clogged evap coil
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15-02-2012, 11:44 PM #7
Re: Mitsubishi VRF Replacement
To the optimist, the glass is half full. To the pessimist, the glass is half empty.
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16-02-2012, 05:45 PM #8
Re: Mitsubishi VRF Replacement
Thanks for the responses Gents
Unfortunatly Mitsubishi have finally stated that the two are not compatable due to comms.
Richard the project would of course be subject to a strength and pressure test to gauge suitablity for r410a.
Regards
Danny