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Air conditioning - Any recommendations please??

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Old 08-10-2011, 01:11 PM   #2431
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Saw the aluminum tape at daiso ion...
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Old 08-10-2011, 09:30 PM   #2432
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wow, what a great thread, needs to be bookmarked for posterity!

I didn't know about this thread and only chanced upon it late last night and has been reading it from last pg up to only Pg 100 now (at this moment i'm still at Yr 2009 posts). I hope to accomplish the humongous task of reading up to Pg 1 by tonight. So, i could then go down to the shops tomorrow to get quotes.

I've learnt so much from chunlianghere, terumo (the professional expert) and 'cute' thesingingbard - tks, folks for making invaluable comments on this topic

In the interest of time, I thought I should now post a few queries which i hope you experts could help enlighten in the meanwhile.

But, first, some background. I bought my Daikin inverter system 4 eleven yrs ago. My fancoil model is Ftk25hve for 3 rooms and fancoil model Ftk50hve for living room aircon. We can't remember condensor model though. My other half wanted to get non-inverter aircon then but my contractor advised otherwise then. Nevertheless our Daikin has served us well these yrs.

My parents have been using the aircon in their room for 1st 7 yrs during the nights (7-8 hrs). The one in my room has hardly been used until 3 yrs ago during the night (which means, i didn't use it for 1st 7 yrs as i didn't like to sleep in aircon previously).

The condenser finally gave way in 2010. The Daikin repair man was an honest man. He asked me not to replace the PCB board as it costs about $750 and it made sense for us to buy a new aircon as my aircon is old. As the weather was a tad warm and we didn't want the hassle to source for a new aircon, we didn't heed his advice and the PCB board lasted a yr - a lesson learnt. The new board after a yr is now burnt beyond repair 3 wks ago so we need to get a new aircon now. I can still go without aircon in meanwhile due to cool weather.

My other half's advice is to go for a non-inverter aircon, which concurs with chunlianghere and terumo's POVs. We will go for a Daikin System 2 this time as we realise we don't need 4 aircons (we hardly use the aircon in the study room and living room). Aircon in our room will be switched on daily for 7-8 hrs. The other aircon will be switched on minimally i.e. probably once a week.

Seems both chunlianghere and terumo are advocators of Daikin too From a number of posts here, Toshiba seems not bad too but for peace of mind, i will go for Daikin since I've personally experienced this brand and i really like the Daikin repair team. Terumo has said G23 and 3/8 suffice so i will stick to that and not upgrade.

A few qns :

1) As my fan coils are still working, can i just replace my condenser with a System 2 and continue to use my existing pipings and trunkings bearing in mind they are already 11 yrs old? Or should i just get a new System 2?

2) I read one very bad review here about Hong Tar and one other bad review about contractor Fairprice Xtra uses so I'm wary of going to these 2. Seems Gain City gets the most positive feedbacks so i will prob just settle for Gain City without shopping around as the analogy terumo gave about 'not being penny wise pound foolish' was very insightful. But, other than being nice to installers, there's no way i can ensure i get quality ones so i can only pray right?

tks.
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Old 08-10-2011, 09:44 PM   #2433
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@freespiritsy

u can replace the condenser, but only from brand's company. dont tink its worth it cos the cost sure to be higher or around the same as getting a new one.

of cos recommended is to change the trunking and pipings. but if the condition of the insulation is gd n piping is using G23, than u can keep it. (since its 11 years, dont tink it is still in gd condition ba?)

for some of the room tat u plan not to change to new aircon, i hav comment on this. it will affect the price of the hse if those room is not air-conditioned. but i guess new hse owner majority will throw the old one n get new one.
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Old 08-10-2011, 10:13 PM   #2434
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@freespiritsy

u can replace the condenser, but only from brand's company. dont tink its worth it cos the cost sure to be higher or around the same as getting a new one.

of cos recommended is to change the trunking and pipings. but if the condition of the insulation is gd n piping is using G23, than u can keep it. (since its 11 years, dont tink it is still in gd condition ba?)

for some of the room tat u plan not to change to new aircon, i hav comment on this. it will affect the price of the hse if those room is not air-conditioned. but i guess new hse owner majority will throw the old one n get new one.
tks 4 quick reply, chunlianghere

seems i can't settle for just a condenser as cost will be similar to getting a new system.

i'm not so sure abt my pipings but i think my trunking is still OK. so prob will need to replace pipings just to be on safe side. i was hoping to save some $ since i will still be using same R22 though changing to non converter aircon. but again, i don't want to be penny wise, pound foolish.

tks, for highlighting about value of flat being affected by 'lack' of aircons - it's news to me, guess i've yet to read up to that part of ur posts guess i've no choice despite this as no pt paying extra for 2 other aircons i might not use.
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Old 09-10-2011, 04:05 PM   #2435
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I've learnt so much from chunlianghere, terumo (the professional expert) and 'cute' thesingingbard - tks, folks for making invaluable comments on this topic
wa thanks freespiritsy... first time being called 'cute' in HWZ.

think chunlianghere basically covered everything.

installation cost for air-con is usually pretty high. so if you're not changing the piping, make sure u get a substantial price reduction becoz of it.

but if you're changing the piping then i suspect it'll pretty much cost the same coz trunkings are actually pretty cheap.
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Old 09-10-2011, 08:19 PM   #2436
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wa thanks freespiritsy... first time being called 'cute' in HWZ.

think chunlianghere basically covered everything.

installation cost for air-con is usually pretty high. so if you're not changing the piping, make sure u get a substantial price reduction becoz of it.

but if you're changing the piping then i suspect it'll pretty much cost the same coz trunkings are actually pretty cheap.
I find u quite a 'darling' the way u 'piped' in, pardon the pun

Noted on ur comments. I will most likely ask for new pipes. Tks
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Old 09-10-2011, 11:37 PM   #2437
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i went to Gain City Marina Sq today. Though I already had in mind to buy Daikin non-inverter System 2, I switched on the aircon of a few brands to test (mostly inverter ones). I was disappointed Daikin non-inverter aircon was not available for me to sample the cool air.

The sales guy was promoting Mitsubishi Industrial inverter as there was an offer of free 5 yr warranty and some $200 disc ($2299) this weekend. He said he sold a few sets today. He also said Daikin does not give discount or free warranty whatsover. Daikin System 2 non inverter costs $1699, excluding $299 warranty.

When i 'test-drove' Mit Ind, i actually liked it very much as the air was so darn cold, which's what i like in an aircon. I know for a fact non-inverter aircons r not as 'cold' though termperature could be tweaked lower. Other half not keen on inverter aircons though.

I also get to see samples of Armaflex of various sizes. All the reading on this thread sure comes in handy.

My other half has asked me to check with 'Cool Serve' to find out cost of just getting a Daikin replacement condenser in meanwhile for a comparison nevertheless as Chunlianghere has already said earlier cost should be similar as replacing a brand new set of aircon.

We are still mulling over 'what' to get ...at this pt I'm just mid-way reading the entire thread.
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Old 10-10-2011, 12:14 AM   #2438
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Freespiritsy,

Your current faulty model outdoor should be 4mk75hven.
Current Daikin 4mkd75dvm cant work with your ftk25hve. You cannot replace the outdoor unit alone, got to change the whole system.
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Old 10-10-2011, 02:42 PM   #2439
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Freespiritsy,

Your current faulty model outdoor should be 4mk75hven.
Current Daikin 4mkd75dvm cant work with your ftk25hve. You cannot replace the outdoor unit alone, got to change the whole system.
tks, terumo. I just read ur msg.

BTW it seems my outdoor model's an even older version i.e. 4mk75. there's this guy whom my other half knew thru this forum previously, seems very knowledgable also as he has come to my place 2 check out my aircon 1 yr ago. My other half just located this lost contact. When i met him previously, he seems very knowledgable. He used to work for Daikin. According to him, he can replace us with just a new Sys 3 non inverter condenser without having to change my room fancoils n pipes for just $1100. He said he could get it directly from Daikin.

I need to find out more since you and those i've asked have confirmed not possible to change just condenser. I spoke 2 my daikin repair man b4 i read ur msg n he also said the same thing. Coolserve also said likewise when i spoke 2 lady a few mins ago.
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Last edited by freespiritsy; 10-10-2011 at 03:17 PM..
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Old 10-10-2011, 04:16 PM   #2440
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If ur blower is fth25hve, ur outdoor is 4mk75hven or 4mk75fven.
If you wan to change to Daikin non-inverterm (Ma56ev16) you need change your existing 3 ftk25hve pcb too. Did he factor that in?
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Old 10-10-2011, 05:20 PM   #2441
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If ur blower is fth25hve, ur outdoor is 4mk75hven or 4mk75fven.
If you wan to change to Daikin non-inverterm (Ma56ev16) you need change your existing 3 ftk25hve pcb too. Did he factor that in?
noted, terumo. My other half just found out my blower is fth25 - an older model, not fth 25hve. Cost includes 4 pcb @ $120 X 4 = $480 plus Brand new sys 4 for $800 (5 yr warranty) = $1280 + $150 bracket. Can't just get condenser for sys 2 or 3. For sys 4 condenser I can also opt for 6/7 yr used one reconned by factory for $370 - probably won't pursue this route.

I will most prob defer to my hub n sign up with this guy.
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Old 10-10-2011, 09:44 PM   #2442
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Ok. It should work.
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Old 10-10-2011, 10:59 PM   #2443
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Ok. It should work.
Tks, terumo I might pay extra $180 for pressure testing 2 find out if my existing pipes r still in Gd order. Else I will change my pipes also

For the pressure testing, i was told there are 2 routes :

1) to dismantle each fancoil to test air pressure at each fancoil. Each fancoil will take approx 2 days to test

2) no need to dismantle each fancoil. Testing will be done only at condenser compressor

I will assume route 1 will be a more thorough test? suffice to just pursue route 2?

another qn : for the pressure test, what degree of PSI drop to to know the pipes are leaking i.e. small drop in PSI from 50 PSI to 45 PSI or huge drop in PSI from 50 PSI to 25 PSI to warrant changing of pipes?

tks, sorry for the barrage of questions.
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Old 12-10-2011, 12:08 AM   #2444
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Usually pressure test, they will test the piping together with the fancoils (since u r using back the fancoils).
total 4 points for the fancoils and piping. No testing for outdoor as you are replacing a new one.
The Psi they put will usually be around 300. If it drops after holding the pressure for 24-48hrs, then the piping/fancoil should be leaking.
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Old 12-10-2011, 01:06 AM   #2445
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Usually pressure test, they will test the piping together with the fancoils (since u r using back the fancoils).
total 4 points for the fancoils and piping. No testing for outdoor as you are replacing a new one.
The Psi they put will usually be around 300. If it drops after holding the pressure for 24-48hrs, then the piping/fancoil should be leaking.
noted. tks, so much, aircon guru!

I'm actually very grateful for all the help u've given me, plus informative posts from chunlianghere and thesingingbard. will love to buy u all kopi or a meal one of these days!
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