Air conditioning - Any recommendations please?? - Part 2

[shenjingbing]

I assume you don’t turn on all FCU at the same time, either max 3 bedrooms or 2 bedroom 1 living.

MBR - 9K if no west sun, 12K if you want slightly faster cooling

BR2 BR3 - 9K way more than enough

Living (18.46sqm) plus Dining (9.6sqm) with closed kitchen only need (18.46+9.6)/5 * 3412 or 19.6K BTU.

you just need to install a system 4 or a 3+1 if you host guests regularly or have a desktop computer producing a lot of heat.

Starmex without removing the current limiter can do 22.5K BTU for the 24K FCU.

so you just need 12/9/9/24 will do. Even with guest it is more than enough. Install the 24K FCU at the structural wall outside the common toilet.

first time hear 4rm BTO size need 5 FCU. Old resale 4rm maybe as some may be 115sqm for old HDB.

If you want redundancy and have 2 compressor in case 1 spoiled, then do 2+2

System 2 (3H28VG)
MBR 12K +BR2 9K

System 2 (3H28VG)
BR3 9K and Living 24K

is this combi or a 3+1 recommended? And I have decided on using 9/9/12/24

personally installing for a 5rm bto. closed kitchen, no west sun but top floor

 

[boombooom]

Need some help here about some cost for aircon repair.

Recently, I engaged gain city to come down and repair my aircon and after diagnosing, they took the outdoor condenser's pcb board back to repair.

As this aircon unit is still under GC's extended warranty, roughly how much will it cost for them to repair or replace? Could anyone advise on this ?

 

[hkchew03]

Need some help here about some cost for aircon repair.

Recently, I engaged gain city to come down and repair my aircon and after diagnosing, they took the outdoor condenser's pcb board back to repair.

As this aircon unit is still under GC's extended warranty, roughly how much will it cost for them to repair or replace? Could anyone advise on this ?

You already engaged them, why not ask them?

 

[boombooom]

You already engaged them, why not ask them?

I want to know aga aga how much first so I can roughly prepare an amount to pay them.

Another aircon company quoted me about 880-900 for replacement of pcb. Very expensive leh.

 

[The_King]

I want to know aga aga how much first so I can roughly prepare an amount to pay them.

Another aircon company quoted me about 880-900 for replacement of pcb. Very expensive leh.

FYI, the board is cheap, it the labour that is expensive

 

[ZacharyA]

FYI, the board is cheap, it the labour that is expensive

Some companies mark-up more on parts. Make on both installation + parts sale.

 

[Jun Jun]

is this combi or a 3+1 recommended? And I have decided on using 9/9/12/24

personally installing for a 5rm bto. closed kitchen, no west sun but top floor

2 systems. 2x9,1+12 and single 24k. E.g. panasonic got a bigger blower 28k. Get a bigger blower should be sufficient.

 

[UchihaSasuke]

Yooohuuuu

glad to see some old timer still so active in here ^^

Some update on my installer as i have install my aircon 1 year 2 months+, and their maintenance contract.
ME 33vg, System 4.

Everything work well, maybe just 1 year + (touch wood) normally my aircon temperature set to 27 as it is cold enough to feel comfortable and not too cold. Aircon on 2 units everyday and once to twice a week, i will turn on my living room and simultaneously 3 units, but always let my room cool down to desired temperature before turning on my living room, otherwise it will take quite long to cool down my living room. No leaking or whatsoever issue/problems.

For maintenance, 1 person will come my house twice yearly to clean my aircon. The first cleaning was done really good, the person literally tear apart my aircon for cleaning water spray and brush every parts for cleaning until water flowing out with no dirt, wipe dry, assemble, test and on aircon, everything completed around 1 hour by 1 person. This is really a good, well done job.

The second cleaning is the same, 1 person will come down and start cleaning the aircon. This is the highlight of the year the funny or shortcut part, i don't know want to cry or laugh this champion after remove my indoor unit casing, without taking out the filter, started spraying water and wash just like that, i was stun (lol) but i did not correct him as this part i can clean myself, after spraying water, he just wipe it for the sake of wiping and in some case, water was still dripping from the cover. Same goes to the 'roller' or whatever it is called, water spray but i still see dirt coming out and he just stopped, and later tell me, all these can't clean 100% one, and wiping dry for the sake of wiping. Install back, and turn on aircon to dry -_- i know this is his standard, in the end, i just want him to finish it and go, everything was finish like 20 - 25 mins for 4 units

Next day morning, i discover there is 'metal rubbing' or 'high pitch' sound from 1 of the unit, i get them to come back to check, unfortunately their available slot is 2 weeks later, as slot proposed by them is not convenient for me. The same guy come back, he also not sure what is the problem, so what he did is remove everything and install back, but this time round, more careful and inform me to observe, and if anything happen i should contact ME. I did not argue with him, but if any issue going to happen, my intention will be going back to them and they are going to coordinate everything and find solution for me, not me going directly to ME. By the way, i have 5 years extended warranty with them.

Conclusion: Every company, even a good one, sometime will have such people that will bring down their company reputation. I can be very biased when i write this by only highlighting the bad thing and forgo the good one done by them, which what most people is always doing, but i choose not to, as i still believe this is a one time issue with this particular guy.

P.S. How is everyone that installed their aircon? Possible to share on your experience

 

[The_King]

Yooohuuuu

glad to see some old timer still so active in here ^^

Some update on my installer as i have install my aircon 1 year 2 months+, and their maintenance contract.
ME 33vg, System 4.

Everything work well, maybe just 1 year + (touch wood) normally my aircon temperature set to 27 as it is cold enough to feel comfortable and not too cold. Aircon on 2 units everyday and once to twice a week, i will turn on my living room and simultaneously 3 units, but always let my room cool down to desired temperature before turning on my living room, otherwise it will take quite long to cool down my living room. No leaking or whatsoever issue/problems.

For maintenance, 1 person will come my house twice yearly to clean my aircon. The first cleaning was done really good, the person literally tear apart my aircon for cleaning water spray and brush every parts for cleaning until water flowing out with no dirt, wipe dry, assemble, test and on aircon, everything completed around 1 hour by 1 person. This is really a good, well done job.

The second cleaning is the same, 1 person will come down and start cleaning the aircon. This is the highlight of the year the funny or shortcut part, i don't know want to cry or laugh this champion after remove my indoor unit casing, without taking out the filter, started spraying water and wash just like that, i was stun (lol) but i did not correct him as this part i can clean myself, after spraying water, he just wipe it for the sake of wiping and in some case, water was still dripping from the cover. Same goes to the 'roller' or whatever it is called, water spray but i still see dirt coming out and he just stopped, and later tell me, all these can't clean 100% one, and wiping dry for the sake of wiping. Install back, and turn on aircon to dry -_- i know this is his standard, in the end, i just want him to finish it and go, everything was finish like 20 - 25 mins for 4 units

Next day morning, i discover there is 'metal rubbing' or 'high pitch' sound from 1 of the unit, i get them to come back to check, unfortunately their available slot is 2 weeks later, as slot proposed by them is not convenient for me. The same guy come back, he also not sure what is the problem, so what he did is remove everything and install back, but this time round, more careful and inform me to observe, and if anything happen i should contact ME. I did not argue with him, but if any issue going to happen, my intention will be going back to them and they are going to coordinate everything and find solution for me, not me going directly to ME. By the way, i have 5 years extended warranty with them.

Conclusion: Every company, even a good one, sometime will have such people that will bring down their company reputation. I can be very biased when i write this by only highlighting the bad thing and forgo the good one done by them, which what most people is always doing, but i choose not to, as i still believe this is a one time issue with this particular guy.

P.S. How is everyone that installed their aircon? Possible to share on your experience

here mine.

i DIY clean my own AC. i guessing the key to keep the FCU coil clean (as dont wait until the fin turn black/black/dirty due to dirt, dust etc... which stuck in the fin then clean, which is by then too late liao, will need those chemical wash but chemical wash use by vendor is alkaline which mean it corrosive to the aluminium fin, which is why you see bubbling (corrosion) when they spray at the aluminium fin ) Also if they use that, they need to really wash off the chemical

So how often to DIY wash is depend on how often you use, like if on daily mean it need to clean every 2 to <3 per month, if on <3 times per week it my guess every 4 to 5 mth. Even if it look clean and shiny

The reason is, like mine FCU, it look clean (i dont see any dust at the fin or blower ) but after washing and when i pour away the water which is collected from a pail as mine dont flow to the drain (as shown in picture) there lot of dust debris at the bottom of the pail

Also to use the fan mode before switching off to keep the coil dry for at least 30min and use condensate table every 2 to 3 week (for me 3 tablet per 2 week or until i see the FCU is clear water then i need to add tablets. one of the pros when collecting water at bucket


every 4th wash, i will remove FCU cover for a deeper DIY wash


the chemical i use is ajax fabuloso, but supersteam 301 or 306, comstar coil is tested safe. but to confirm it yourself, cut some aluminium foil and soak it with the the chemical you want to use for your FCU for 24hr, if it stay the same, then it safe. those above contain, which i cant remember something that can remove dirt, dust, stain etc... and it aluminium safe


for installed of my aircon. so far 1.4yr liao, still as cool, no leak, no condense at trunking (even when i on 17hr per day) so cannot fault them yet





update: when i say FCU clear water, i mean my condensate tablet is green in color, so i can tell if the tablet already all dissolved or not. so clear mean need to add more condensate table

after 3yr, i may get a steam cleaner from TB to try to clean the coil(not sure if it work). i have a round pin socket which can support 20amp as the electricians told me they use the wire can support 20amp. so watt should not be a issue, cause currently i using the socket for my induction, easily go to 3500watt for 1 hr cooking and the socket feel normal temp

 

[Milolover2345]

If u playing to on all, then it’s best to get 2 separate compressor. Like myself.
Then u won’t overload your compressor lor..
So it’s all about usage pattern. Also cost of initial setup.

Hi is 20K Btu enough for 2 room Hdb lvr and kitchen combined about 204 square feet? Bedroom is 9k Btu Both 20k Btu and 9K Btu paired with MXY-3H28VG.

 

[Milolover2345]

I see a lot of users trying to cut on their compressors, I wonder if anyone regretted it ?
I went in the other direction and oversized mine
No regrets

Hi is 20K Btu enough for 2 room Hdb lvr and kitchen combined about 204 square feet? Bedroom is 9k Btu Both 20k Btu and 9K Btu paired with MXY-3H28VG.

 

[RoLanTo]

hi all, getting a resale unit.. can suggest whether to get Mit or Daikin and their respective models? Thanks in advance. Idea is not turning ON all at the same time (only at exceptional.. then maybe need all), and try split the load amount both compressor so both are working instead of 1 working all the time, and the other not working.

i intend to do
a System 3
- 2 x 9k BTU (bedroom 2 and 3)
- 1 x 18k BTU (Living room)

a system 2
- 1 x 9k BTU (master room)
- 1 x 13k BTU (Living room - dining area)

 

[obichacha]

hi all, getting a resale unit.. can suggest whether to get Mit or Daikin and their respective models? Thanks in advance. Idea is not turning ON all at the same time (only at exceptional.. then maybe need all), and try split the load amount both compressor so both are working instead of 1 working all the time, and the other not working.

i intend to do
a System 3
- 2 x 9k BTU (bedroom 2 and 3)
- 1 x 18k BTU (Living room)

a system 2
- 1 x 9k BTU (master room)
- 1 x 13k BTU (Living room - dining area)

below the combination nothing wrong.
System 3 can handle 9x2 + 18 and system 2 , 9+13 no issue.

 

[RoLanTo]

below the combination nothing wrong.
System 3 can handle 9x2 + 18 and system 2 , 9+13 no issue.

Thanks.. 1 question, the outdoor unit for daikin is it slightly less power compared to Mitsubishi? their 50 (system2) and 75 (system3) can do the trick as well?

 

[obichacha]

Thanks.. 1 question, the outdoor unit for daikin is it slightly less power compared to Mitsubishi? their 50 (system2) and 75 (system3) can do the trick as well?

Never used daikin from previously.
All the way using Mitsubishi starmex

 

[ZacharyA]

Thanks.. 1 question, the outdoor unit for daikin is it slightly less power compared to Mitsubishi? their 50 (system2) and 75 (system3) can do the trick as well?

Yes they will be more underpowered.

I am using a System 3 compressor (75) on a System 2 configuration (9+12) and is powerful enough.

Not all System 2 / System 3 compressors are built equally across brands.

FCU is more / less same in terms of 9/10k, 12/13k, 15k, 18k, 21k, 24.

But big FCU is better to use a System 1 standalone to be most efficient and powerful. Like a System 1 24k for living + dining.

 

[petetherock]

It’s not about the FCU
It’s the compressor

 

[Ah Ken]

Hi all, seeking some advices. I am currently on the lookout for 3x 9K for rooms and 1x 24K BTU for living room. These will be replacing my current broken down system which 3x 9K + 1x 18K BTU. The 18K is to one compressor while the 3x 9K are together to one compressor.

I am going to do the same for the new system using Mitsubishi Electric (ME). Living room is planned to upsize to 24K BTU. I learned that for the 24K BTU would be a single split system using MSY-GP24VF + MUY-GP24VF while the system 3 will be a multi split using MSXY-FP10VG + MXY-3H28VG.

My aircon ledge is outside of the Masterbed room window which measured approximately 76cm in height and almost 1m diagonally. There is also only a single isolator. My current junction point after visiting Gain City is that the 24K system compressor cannot be brought out from that window access since the compressor is so big. I am being offered Panasonic with 20K BTU for living room instead. I was told that Singapore doesn’t retail 20K BTU for Mit. Elect. The single isolator is also a concerned raised by the sales rep.

How should I work about this? I notice that multi split compressors are smaller size. Is it not possible to solely operate a 24K BTU unit with a multi split compressor separately? Or should I reconsider having a 2x System 2 with the 24K BTU and a 9K BTU together?

My usage would be when living room is turned on, usually it will only be 1 room that may be additionally turned on. Most of the time, two rooms will only be used. We are also not heavy user, only weather is too hot.

Thanks in advance!

 

[The_King]

Hi all, seeking some advices. I am currently on the lookout for 3x 9K for rooms and 1x 24K BTU for living room. These will be replacing my current broken down system which 3x 9K + 1x 18K BTU. The 18K is to one compressor while the 3x 9K are together to one compressor.

I am going to do the same for the new system using Mitsubishi Electric (ME). Living room is planned to upsize to 24K BTU. I learned that for the 24K BTU would be a single split system using MSY-GP24VF + MUY-GP24VF while the system 3 will be a multi split using MSXY-FP10VG + MXY-3H28VG.

My aircon ledge is outside of the Masterbed room window which measured approximately 76cm in height and almost 1m diagonally. There is also only a single isolator. My current junction point after visiting Gain City is that the 24K system compressor cannot be brought out from that window access since the compressor is so big. I am being offered Panasonic with 20K BTU for living room instead. I was told that Singapore doesn’t retail 20K BTU for Mit. Elect. The single isolator is also a concerned raised by the sales rep.

How should I work about this? I notice that multi split compressors are smaller size. Is it not possible to solely operate a 24K BTU unit with a multi split compressor separately? Or should I reconsider having a 2x System 2 with the 24K BTU and a 9K BTU together?

My usage would be when living room is turned on, usually it will only be 1 room that may be additionally turned on. Most of the time, two rooms will only be used. We are also not heavy user, only weather is too hot.

Thanks in advance!

get another isolator, my 2nd isolator trunking goes from DB box to toilet to ac ledge

if you only want starmex this is the option

system 2 btu is 15.3k only, you count the btu from the condenser side not fcu side. but if you want all starmex. this is the option

option1: you get system 2 for the 2 smallest room and system 3 (22k btu) to 2 (2 FCU - fp20vp) of the biggest room (but only 1 can be on at the same time)

option 2: system 3 for the 3 bedroom @ 9k +9k+12k and system 3 with 1 FCU (24k)




if dont mind the brand, many 20k btu can fit your windows, but if you more then 24k btu and single split system for living rm this is the option

option 1: Daikin model (RZFC100DV1G/ FAFC100AV1G) aka 30k btu and will fit your windows as it height is 695mm for living room

 

[skazzz]

Yooohuuuu

glad to see some old timer still so active in here ^^

Some update on my installer as i have install my aircon 1 year 2 months+, and their maintenance contract.
ME 33vg, System 4.

Everything work well, maybe just 1 year + (touch wood) normally my aircon temperature set to 27 as it is cold enough to feel comfortable and not too cold. Aircon on 2 units everyday and once to twice a week, i will turn on my living room and simultaneously 3 units, but always let my room cool down to desired temperature before turning on my living room, otherwise it will take quite long to cool down my living room. No leaking or whatsoever issue/problems.

For maintenance, 1 person will come my house twice yearly to clean my aircon. The first cleaning was done really good, the person literally tear apart my aircon for cleaning water spray and brush every parts for cleaning until water flowing out with no dirt, wipe dry, assemble, test and on aircon, everything completed around 1 hour by 1 person. This is really a good, well done job.

The second cleaning is the same, 1 person will come down and start cleaning the aircon. This is the highlight of the year the funny or shortcut part, i don't know want to cry or laugh this champion after remove my indoor unit casing, without taking out the filter, started spraying water and wash just like that, i was stun (lol) but i did not correct him as this part i can clean myself, after spraying water, he just wipe it for the sake of wiping and in some case, water was still dripping from the cover. Same goes to the 'roller' or whatever it is called, water spray but i still see dirt coming out and he just stopped, and later tell me, all these can't clean 100% one, and wiping dry for the sake of wiping. Install back, and turn on aircon to dry -_- i know this is his standard, in the end, i just want him to finish it and go, everything was finish like 20 - 25 mins for 4 units

Next day morning, i discover there is 'metal rubbing' or 'high pitch' sound from 1 of the unit, i get them to come back to check, unfortunately their available slot is 2 weeks later, as slot proposed by them is not convenient for me. The same guy come back, he also not sure what is the problem, so what he did is remove everything and install back, but this time round, more careful and inform me to observe, and if anything happen i should contact ME. I did not argue with him, but if any issue going to happen, my intention will be going back to them and they are going to coordinate everything and find solution for me, not me going directly to ME. By the way, i have 5 years extended warranty with them.

Conclusion: Every company, even a good one, sometime will have such people that will bring down their company reputation. I can be very biased when i write this by only highlighting the bad thing and forgo the good one done by them, which what most people is always doing, but i choose not to, as i still believe this is a one time issue with this particular guy.

P.S. How is everyone that installed their aircon? Possible to share on your experience

seen alot of brush and go but talk like did a superb job
this is how the industry is