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Air conditioning - Any recommendations please??

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Old 03-12-2016, 12:19 PM   #8821
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Hi bro dachee,

Based on 3 friends and relatives, keep tell me starmex cannot go wrong one. That's why I am here reading see if can get a recommended model for system 4 or to get a 3 +1
Hi, StarMex has a 4 ticks single split system, 2 ticks and 5 ticks for other configurations.

They are different in some ways though they are all StarMex. The reliability of air conditioner depends on both the product as well as the installation. Good product can fail if installation is poorly done.

From the specs, features as well as the support, this product can be considered. Again, you need to check your configuration.

Hope above is helpful.
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Old 03-12-2016, 12:48 PM   #8822
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Hi, StarMex has a 4 ticks single split system, 2 ticks and 5 ticks for other configurations.

They are different in some ways though they are all StarMex. The reliability of air conditioner depends on both the product as well as the installation. Good product can fail if installation is poorly done.

From the specs, features as well as the support, this product can be considered. Again, you need to check your configuration.

Hope above is helpful.
Ok, my config now is down to 2 options.
1) system 4 starmex, living room BTU 12000 ....other 3 9000 (not sure if can change living room to 18000)
2) system 3 12000-9000-9000, system 1 one FCU....
Read though the pages here, seems to be go for the 2 ticks for reliability
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Old 03-12-2016, 01:13 PM   #8823
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Ok, my config now is down to 2 options.
1) system 4 starmex, living room BTU 12000 ....other 3 9000 (not sure if can change living room to 18000)
2) system 3 12000-9000-9000, system 1 one FCU....
Read though the pages here, seems to be go for the 2 ticks for reliability
To other readers, Any comments from you? Do share your experiences.
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Old 04-12-2016, 12:02 AM   #8824
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Ok, my config now is down to 2 options.
1) system 4 starmex, living room BTU 12000 ....other 3 9000 (not sure if can change living room to 18000)
2) system 3 12000-9000-9000, system 1 one FCU....
Read though the pages here, seems to be go for the 2 ticks for reliability
Hi,

1. System 4 SatrMex can have the following combination for HDB with limited current (assuming that you are in HDB with limited current, do let me know if I am wrong) There are HDB without limited current too.

For the condenser MXY-4A28VA (2 ticks) with total indoor capacity not exceeding 15.6kW or 53,229 Btu, you can have FCUs combination of 10+10+10=13/18/24/26. So having 18 kW for the living room is possible.

However with this condenser, each FCUs will only have the following max. capacity and not the individual FCU max capacity.

10+10+10+13 = 1.8 kW (6.1k Btu); 1.8; 1.8; 1.8 kW (6.1k Btu) = total 7.2 OR
10+10+10+18 = 1.5 kW (5.1k Btu); 1.5; 1.5; 2.7 kW (9.2k Btu)= total 7.2

According to the spec, the FCU "10" has a capacity of 2.5 kW (8.5k Btu) but in this system 4 configuration all the FCUs are under utilized. And your FCU "13" is now running lesser than the FCU "10" of 2.5 kW.

When you increase your system 4 combination to include FCU "18", your FCU "10" drop to 1.5 kW (5.1k Btu).

So you need to be careful in selecting the configuration.

Alternatively you can up size your system 4 to a 38VA which will give you the following:

10+10+10+13 = 1.82; 1.82; 1.82; 2.54 = 8.0 kW OR
10+10+10+18 = 1.60; 1.60; 1.60; 3.20 = 8.0 kW

Noticed that all FCUs are not running at full capacity. The FCU 13 and 18 can run at full capacity of 3.5 kW (11.9k Btu) and 5 kW (17k Btu).

2. The System 3 +1 combination seems to give better capacity for each FCU when compare to system 4.

But you may wish to check the installation and combination prices of 13+10+10 and 10 as well as 10+10+10 and 13. Check the FCU capacity for each combination. They are quite close.

The above are my opinion and hope that they are helpful.
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Old 04-12-2016, 01:07 AM   #8825
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To miketan_wh,

If system 1 x 2, you have to factor additional power point & bracket too, which adds up to be higher in some cases.
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Old 04-12-2016, 01:08 AM   #8826
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To orangeman,

Yours is 4 room flat?
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Old 04-12-2016, 01:24 AM   #8827
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To miketan_wh,

If system 1 x 2, you have to factor additional power point & bracket too, which adds up to be higher in some cases.
Terumo is right. Each condenser would needs its own power point at the condenser and breaker at the DB. Bracket is subject to its need.

For other reader who may have sufficient space to install 2 condensers, you may wish to consider your usage pattern. If you use 1 FCU most of the time and another FCU rarely, then in the event that the frequently used condenser is down and need replacement, the other system will still be operational and relatively new. However if you have a system 2, then both FCUs will be affected and the replacement of a system 2 condenser will be more expensive.

Good to do your maths not only for unit and installation cost but also operational and maintenance cost.

Above are my opinon, hope that they are helpful.

Last edited by dachee; 04-12-2016 at 07:51 AM..
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Old 04-12-2016, 12:13 PM   #8828
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Hi experts.. I am changing old star Mex ( 11 years ). As I on very cold still tough to cool down.

Mine is 4room

Unit is
Living room ( use once in blue moon )
MBR ( about 12 hours a day )
Br 1 ( about 8 hours a day )
Br 2 ( about 1 hour a day )

Hence I guess I need super energy saving ..

Means I must buy MXY-4G28VA ? This got 4 ticks. Thanks
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Old 04-12-2016, 12:17 PM   #8829
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Hi experts.. I am changing old star Mex ( 11 years ). As I on very cold still tough to cool down.

Mine is 4room

Unit is
Living room ( use once in blue moon )
MBR ( about 12 hours a day )
Br 1 ( about 8 hours a day )
Br 2 ( about 1 hour a day )

Hence I guess I need super energy saving ..

Means I must buy MXY-4G28VA ? This got 4 ticks. Thanks
Hi,

May I know what temperatures are normally set for each respective rooms?

Pls clarify what you mean by: As I on very cold still tough to cool down.

Last edited by dachee; 04-12-2016 at 12:25 PM..
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Old 04-12-2016, 12:57 PM   #8830
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Ok .. Thanks.

As in now I have to set like 16 degrees high fan just to get the room to cool. Usually no.

I normally like to set 23 degree
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Old 04-12-2016, 12:58 PM   #8831
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To orangeman,

Yours is 4 room flat?
Yes is a 4-room flat
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Old 04-12-2016, 12:59 PM   #8832
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Hi,

1. System 4 SatrMex can have the following combination for HDB with limited current (assuming that you are in HDB with limited current, do let me know if I am wrong) There are HDB without limited current too.

For the condenser MXY-4A28VA (2 ticks) with total indoor capacity not exceeding 15.6kW or 53,229 Btu, you can have FCUs combination of 10+10+10=13/18/24/26. So having 18 kW for the living room is possible.

However with this condenser, each FCUs will only have the following max. capacity and not the individual FCU max capacity.

10+10+10+13 = 1.8 kW (6.1k Btu); 1.8; 1.8; 1.8 kW (6.1k Btu) = total 7.2 OR
10+10+10+18 = 1.5 kW (5.1k Btu); 1.5; 1.5; 2.7 kW (9.2k Btu)= total 7.2

According to the spec, the FCU "10" has a capacity of 2.5 kW (8.5k Btu) but in this system 4 configuration all the FCUs are under utilized. And your FCU "13" is now running lesser than the FCU "10" of 2.5 kW.

When you increase your system 4 combination to include FCU "18", your FCU "10" drop to 1.5 kW (5.1k Btu).

So you need to be careful in selecting the configuration.

Alternatively you can up size your system 4 to a 38VA which will give you the following:

10+10+10+13 = 1.82; 1.82; 1.82; 2.54 = 8.0 kW OR
10+10+10+18 = 1.60; 1.60; 1.60; 3.20 = 8.0 kW

Noticed that all FCUs are not running at full capacity. The FCU 13 and 18 can run at full capacity of 3.5 kW (11.9k Btu) and 5 kW (17k Btu).

2. The System 3 +1 combination seems to give better capacity for each FCU when compare to system 4.

But you may wish to check the installation and combination prices of 13+10+10 and 10 as well as 10+10+10 and 13. Check the FCU capacity for each combination. They are quite close.

The above are my opinion and hope that they are helpful.
Hi bro dachee,
This is definitely very useful....thanks for clearing my doubts
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Old 04-12-2016, 01:05 PM   #8833
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Air conditioner DIY group.

Hi, Is there anyone here who is interested to form a DIY group to provide installation of air conditioners for each other for free with the objective of keeping a high standard in the air conditioner installation as well as addressing the over charge cost and poor workmanship from the installation industry?

Members can also help each other in maintaining each other's air conditioners and trouble shoot if any. Arrangement will be made for members to attend appropriate courses.

For example, some times, an air conditioner is not cold because the compressor in the condenser does not kick in (start). This fault is likely due to a defective start capacitor that helps the compressor motor to start turning. A contractor would likely charge you $180-200 for checking and replacing the capacitor which takes about 10 mins work. The cost of a capacitor is less than $10. Doing this simple repair work yourself can save you lots of unnecessary money and sometime problem with contractor poor workmanship.

There is no sex restriction for members.

What do you all think about this? Will it work?
randyap and shrumm like this.
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Old 04-12-2016, 01:56 PM   #8834
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Ok .. Thanks.

As in now I have to set like 16 degrees high fan just to get the room to cool. Usually no.

I normally like to set 23 degree
1. May I know what is your StarMex model (indoor and outdoor) that you are currently having?

2. Does this cooling problem happen only in some, all or only one room?

3. Did you have the problem checked and what is their diagnosis?

4. Or you just want to change because yours is already 11 year old?
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Old 04-12-2016, 03:20 PM   #8835
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1. May I know what is your StarMex model (indoor and outdoor) that you are currently having?

2. Does this cooling problem happen only in some, all or only one room?

3. Did you have the problem checked and what is their diagnosis?

4. Or you just want to change because yours is already 11 year old?
I not sure the model

But it only happens with one unit .. The MBR one. Chemical wash also not much help
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