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Thread: daikin vrv's
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24-10-2005, 08:50 AM #51
Re: daikin vrv's
Stupid me - I've just caught up with the postings in the Moderators Area
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24-10-2005, 10:03 AM #52
Re: daikin vrv's
Me to, but that doesn't make me to change my post nor edit it.
Now it comes...........again.......all the abbreviations with 4 letters, NRIJ,.....describing the whole being of a person in just 4 letters.
A M A Z I N G
Could refrigeration be that simple......Last edited by Peter_1; 24-10-2005 at 07:08 PM.
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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24-10-2005, 05:16 PM #53
Re: daikin vrv's
Me to, but that doesn't make me to change my post nor edit it.
What is the difference between changing a post and editing a post?
Thanx for the attention.
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28-10-2005, 10:17 AM #54
Re: daikin vrv's
Is this place becoming all
schitzophrenic?????????
( I have never been able to spell that)Any opinions, statements and facts expressed in this message do not constitute legal advice in any shape or form and is given for a general outlook in nature. You are advised to seek appropriate and specific professional assistance from a regulated and authorised advisor for definitive advice.
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09-01-2006, 10:51 AM #55
Re: daikin vrv's
Hi Raymond
Just re-visiting this old thread.
Did you manage to sort out the problem with your G series unit?
Any chance of an update - don't forget - we do site visits for reasonable reward
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11-01-2006, 07:44 PM #56
Re: daikin vrv's
Originally Posted by frank
Hi Frank,
First things first, ever thought of moving to Cambridge. I know a company looking for a good Daikin engineer, Unfortunatly they got me instead
Strangly got called back to the site today as the customer wants it SORTED OH REALLY !!!
Now, can't be arsed to go through previous posts to see what i've put plus my dial up is getting slower and slower so would take me all night, what i think however
VRV has a cooling rating of 162.5
Indoor units add up to 212 so in theory should have never worked. Customer response "It used to work !"
Now the reception area of the building used to be seperate rooms but now its all gone open plan so i think more duty is being put on the unit. Also the unit is getting older (Arnt we all) and therefore probably having to work harder.
Now, i would like to reclaim, vac out overnight and regas. My problem then is, If i regas to the original VRV spec, surely this is enough gas to cope with a 162.5 capacity and not 212, therefore how much extra gas should i put in.
The problem its on a fully comp contract. Therefore my company doesn't want me to spend vast amounts on gas and it not clear the fault, the customer on the other hand doesn't care how often they call us as i doesn't cost them.
Oh the joys of the job
Regards
RayLast edited by Latte; 11-01-2006 at 07:51 PM.
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11-01-2006, 09:18 PM #57
Re: daikin vrv's
Raymond
First things first, ever thought of moving to Cambridge. I know a company looking for a good Daikin engineer, Unfortunatly they got me instead
My daughter lives in St Ives so I'm a regular visitor to the area
Customer response "It used to work !"
Now, i would like to reclaim, vac out overnight and regas. My problem then is, If i regas to the original VRV spec, surely this is enough gas to cope with a 162.5 capacity and not 212, therefore how much extra gas should i put in.
Why not suggest to the customer that you ought to bring in a Daikin specialist to confirm the system is not installed to manufacturers specs and that to solve the problem will cost him some money? after all it's not your fault. Plus I may get to spend the night visiting the daughter
I'll only charge the same as Space Air or Daikin UK
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11-01-2006, 09:55 PM #58
Re: daikin vrv's
Originally Posted by frank
Better speak to cooling-gurus about that one
Looking at the site list i have, the main reception open plan area just off it have 2x40's 1x32 & 2x25. This if my math is righ is 162. There are two other units on this system on offices both 25's. I suppose the obvious answer would be to take these two off the circuit and put on their own condensing units.
Sounds simple but i expect it to be a pig of a job.
Anyway i have done my bit, i can only report what i find. Its up to those far higher up the ladder than me to come up with a solution
Regards
Raymond
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11-01-2006, 10:56 PM #59
Re: daikin vrv's
Originally Posted by rdocwra
Can you not size a vrv/vrf at 130% ? because not all indoor units will be switched on or running at 100% all of the time.
ie 162.5 +30% = 211 therfore,just inside the design limit.
cheers
eggs
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12-01-2006, 01:22 PM #60
Re: daikin vrv's
There are two other units on this system on offices both 25's. I suppose the obvious answer would be to take these two off the circuit and put on their own condensing units.
Although you could use the 2 x 25's on a super multi but this would be more expensive than just putting in 2 new split systems.
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12-01-2006, 01:35 PM #61
Re: daikin vrv's
Originally Posted by frank
this is a R22 system so you're effed anyway...
cheers
richard
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12-01-2006, 09:14 PM #62
Re: daikin vrv's
Originally Posted by eggs
In one respect the system can operate at 135% capacity which will mean that the indoor performance is reduced but the maximum index of the outdoor unit should not be exceeded. The high end index number relates to the 135% capacity so if you go over this then the indoor performance reduces even more as is evident by Raymond's system.
When designing a system you should calculate the indoor index numbers then select the outdoor to match - if some of your indoor units only run very little and you don't mind the temporary drop in performance then you can select the outdoor at a high index.
It's easier to understand with the selection charts in front of you
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12-01-2006, 10:15 PM #63
Re: daikin vrv's
Hi Eggs,
I theory it could work like that, unfortunatly since they have gone all open plan the units are having to work hard all the time, especially as the receptionist thinks she's in spain and runs it at 25 all day long. I think the system would have coped before as units will have shut down in their smaller area's but no chance of that now
Regards
Fatboy
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14-01-2006, 04:08 PM #64
Re: daikin vrv's
Raymond
I found this troubleshooting guide for checking refrigerant charge
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14-01-2006, 06:32 PM #65
Re: daikin vrv's
Nice one, thanks Frank
Brian - Newton Abbot, Devon, UK
Retired March 2015
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14-01-2006, 09:36 PM #66
Re: daikin vrv's
RD
I was going to mail message you some details regarding the fault encounter but system was down. Here are the attachment. Mine are all hardcopies, hard to post the manuals down here. If you're here maybe I can hand it over to you.
Hope this things helps.
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