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Air conditioning - Any recommendations please??

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Old 10-01-2015, 04:33 PM   #5116
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To RSKeisuke,

I duh tink its the vents issue, if vent is loose, fan will not work @ all.

Should be a pcb or wiring issue.
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Old 10-01-2015, 05:16 PM   #5117
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Tried the vents, fault persist.
May be the thermistor..

Any idea how much is the thermistor?
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Old 11-01-2015, 06:34 PM   #5118
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Need advice - Purchase new aircon

Hi everyone and AC Gurus!

My old compressor up lorry liao and also a bit crazy liao. Looking at buying a new AC system.

Can anyone give advice? A few considerations:

1) Need aircon in 3 rooms:
Master Bedroom (MBR): 15.95 sqm
Bedroom 1 (BR1): 11.10 sqm
Bedroom 2 (BR2): 10.90 sqm

(MBR and BR1 has afternoon/evening sun, so the wall can get quite hot)
(MBR and BR2 likes cold temperature, somewhere around 22-23 deg celsius)

2) Looking at Daikin brand, its currently the better brand out there right? I believe we will also need it to be inverter based, since we use it for quite long hours, around 9pm - 6am on weekdays

3) Upgrades that we need? Read from Aircon Guru blogspot *Thanks Terumo!
a) Since R22 phasing, should we get R410A gas aircon?
b) Copper Pipes: Minimum is G23, but can HDB use G22 or G21??
c) Insulation:
3/8 Thickness (is there any difference between Class 1 and Class 0?)
What is the better brand to use? Armaflex?

3) What are the more recommended aircon installer that has better reputation on workmanship?

Thanks!

:Edit

Ideally would prefer for the condenser unit to have enough BTU to support operation of all 3 units.
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Last edited by nervcore; 11-01-2015 at 07:19 PM..
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Old 12-01-2015, 12:35 AM   #5119
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To nervcore,
1. All 3 rooms 9k btu is enough.
2. Inverter will be good.
3a. All brands inverter only have r410a gas
3b. G22 is good to have. G21 is for commerical usage usually.
3c. IMO, not much difference. The class rating is for heat properties.
Armaflex is good & commonly used by aircon companies.

Take a 27k btu condensor will do.
For Daikin 3mks71esg or 4mks80esg.
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Old 12-01-2015, 06:16 AM   #5120
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To nervcore,
1. All 3 rooms 9k btu is enough.
2. Inverter will be good.
3a. All brands inverter only have r410a gas
3b. G22 is good to have. G21 is for commerical usage usually.
3c. IMO, not much difference. The class rating is for heat properties.
Armaflex is good & commonly used by aircon companies.

Take a 27k btu condensor will do.
For Daikin 3mks71esg or 4mks80esg.

Hi Terumo, thanks for the advice, but I'm a bit confused looking at c***serve website,

When I click at the "set" to look at details and price breakdown, I see:
FTKS25DVM (QTY:3)
Capacity BTU/hr : 8530

But from the outside page before I click on the "set" details they quoted "8,188 x 3 Btu/hr" so which is the actual BTU for that unit?

Unfortunately, none of their sets have 9k BTU/hr, if the actual BTU per fan coil is 8530, does the 470 BTU make a lot of difference?

Thanks!
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Old 12-01-2015, 10:24 AM   #5121
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To nervcore,

Some state as 8k, some state as 9k. Its ok, +/- 10%.
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Old 12-01-2015, 10:44 AM   #5122
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To nervcore,

Some state as 8k, some state as 9k. Its ok, +/- 10%.

Hi Terumo, noted. by the way, in your opinion is c***serve a reliable company to buy/install new aircon? can pm me if not convenient to say. haha. thanks =)
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Old 13-01-2015, 12:10 PM   #5123
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Hi Terumo Guru,

I'm getting my new BTO 5-room flat soon and just wondering if this configuration is good?

From AJ Aircon (Anyone have experiences with them?)

Mitsubishi System 4 M/O MXY4A28 / 3 X GE10 / GE18 $3550 + free $200 Aircon Service Voucher

Installation Includes:
- Armaflex Class 1 with PSB Thermal Conductivity Tested
- Drainage pipe 16mm with 1/4" thickness insulation
- Trunking min 2mm thick
- Copper Pipe - Grade 23 with PSB Tested
- Cable - 3C70 for CU & 3C40 for Fan Coil (Made in Singapore)

Too technical with all the model numbers, not sure what's what.

Thanks in advance for your help!
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Old 13-01-2015, 12:59 PM   #5124
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air con replacement - pls advise

hi Terumo guru and all gurus,

I'm going to replace my current aircon(daikin sys-4) in my hdb unit which is already almost 10 years and got faulty(keep on leaking, monthly have to top-up R22).

3 in the bedroom and 1 in the living room...since 3 regularly used an 1 seldom use, so thinking to change to sys-3 and left 1(liv room) as dummy unit.

I got deal from GC for panasonic aircon as below :

1. Sys-3 inverter CU3S27MKZ-3XCSS9PKZW 2 ticks at $2,999

2. Upgrade extended warranty to premium(peace of mind) - 4 years at $99

3. Upgrade Armflx to 1/2"(class1) + Cooper upg 23 to 22 at $180

4. Dismantle and retain bracket and current sys-3

5. Drainage pipe 16MM

Freebies :

1. Panasonic Microwave Oven, est arn $199

2. Eikou air Purifier, est arn $299

3. GC photo frame

4. 5(1+4) years warranty, 1 year with pana and 4 years with GC(service cost capped at $1800) est arn $399

so total pay arn $3,278 with 36 month installment

A. pls advise if this deal worth ? and what's need to be concerns during the aircon replacement ? since i never deal with GC and have less knowledge for this kind of aircon installment/replacement.

B. should i removed the display unit or just leave it there, consider if remove need to repain whole wall

C. Any idea best credit card to use for 36 month installment ?

D. will it troublesome if kids(1 toddler & 1 years baby) around during the installation ?

E. There's certain part of exisiting piping is under false ceiling(very short ones), is it a must to cut the false ceiling to take out existing piping and install new piping ?

F. Cooper upgrade from 23 to 22 and insulator armflx upgrade to 1/2", is it ncecessary for R410 ? some parts of the piping may run thru toilet/outdoor.

G. Peace of mind extended warranty for 4 years at $99, is it worth ? or normal ones which is capped at $1800 for 4 years more than enough ?

H. Entitle 50 Feet of piping per FCU, is it enough for 3 bedroom ? flat size arn 90 sm2.

Pls advise and appreciate any inputs

Thank's
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Old 14-01-2015, 10:44 AM   #5125
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To sak2376,
A. The Panasonic price is high compared to market but reasonable considering the freebies u r getting.
B. Up to u.
C. No comments.
D. Yes. There might be noisy works.
E. If possible is to replace all.
F. Good to have.
G. U have to read the terms & conditions carefully 1st.
H. Shld be enough, total 150 ft.
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Old 14-01-2015, 01:04 PM   #5126
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Hi, will frequently turning off and on the main switch(on wall outlet) of the aircon eventually spoil the aircon?
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Old 14-01-2015, 01:12 PM   #5127
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Hi, will frequently turning off and on the main switch(on wall outlet) of the aircon eventually spoil the aircon?
If you really never plan to used again or go oversea 3 mths or longer, then just turn off for power saving energy.

Otherwise on & off also can be spoil PCB.
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Old 14-01-2015, 01:20 PM   #5128
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Hi Terumo Guru,

I'm getting my new BTO 5-room flat soon and just wondering if this configuration is good?

From AJ Aircon (Anyone have experiences with them?)

Mitsubishi System 4 M/O MXY4A28 / 3 X GE10 / GE18 $3550 + free $200 Aircon Service Voucher

Installation Includes:
- Armaflex Class 1 with PSB Thermal Conductivity Tested
- Drainage pipe 16mm with 1/4" thickness insulation
- Trunking min 2mm thick
- Copper Pipe - Grade 23 with PSB Tested
- Cable - 3C70 for CU & 3C40 for Fan Coil (Made in Singapore)

Too technical with all the model numbers, not sure what's what.

Thanks in advance for your help!
WAH so detailed.

How come you guys need G21 copper pipes?
Even G22 good enough already, unless the copper all exposed outside to direct sun.

If upgrade for better rubber foam to prevent water dripping an issue, yes I will do that.
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Old 14-01-2015, 01:35 PM   #5129
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air con replacement - pls advise

Thank's Terumo for your reply, appreciate it !

check with u couple things again if u dun mind

1. what's need to be concerns during the aircon replacement ? since i never deal with GC and totally blur for this kind of things(installment/replacement).

2. abt the false ceiling again, There's certain part of existing piping is under false ceiling(very short distance ones), iz it a must to cut the false ceiling to take out existing trunking and install new trunking ? or can use existing trunking inside the false ceiling to put new piping and no need to cut it at all ? i worried would be messy if need to cut the false ceiling.

3. Cooper upgrade from 23 to 22 and insulator armflx upgrade to 1/2", u said "good to have", does it meant 23 good enough for R410 ? so can save cost rather than use 22.

4. Peace of mind extended warranty for 4 years at $99, i'm not yet read the t n c(dunno where to find also), the sales guy just said peace of mind only, did u or anyone ever had experience with this kind of things prev with GC ?
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Old 14-01-2015, 01:43 PM   #5130
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to kim sim,

i think this could be the reason why my existing daikin compressor spoiled because of frequently on n off which caused the PCB burned...but before i did frequent turn on n off, the aircon sometimes can turn on auto ones noe without anyone pressing the remote(like there's 'ghost') and can turn on during working day and caused pub cost rocket high if u're not at home, scary rite ?

anyway, it's arn 10 years already, time to change i think
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