Air conditioning - Any recommendations please?? - Part 2

[The_King]

Hi sifu, how to tell the aramflex class 0 insulator is really 3/8 inch or 1/2 inch insulator ?

I ask the installer they advice the 3/8 or 1/4 wording on the insulator is for the copper pipe size inside. Is it true ?

I took the insulator and measure myself and it seems look like 1/2 inch.

sometime they got put the side

 

[The_King]

quick update after month of testing:

Detail:
room size 5.51m by 2.92m
Room insulation;
windows: 1 normal bedroom windows (3 windows ) and another is 3/4inch windows (4 windows )
another side is seal up as shown in picture

starmex system 1 12k btu, tested in afternoon 1 to 5pm.

room cool down based on FCU operation light off
26c at speed 3 = 8min to 12min
25c at speed 3 = 12min to 15min
24c at speed 3 = 17min to 21min
21c at speed 3 = 50min to 1hr 20min
21c at speed 4 = 50min to 1hr 20min



tested in evening 8pm to 12am
26c at speed 3 = 5min to 8min
25c at speed 3 = 6min to 8min






nv really test other speed, so cant share much

in short, those that like cold, you really need a ac with lot of btu else your AC will wear out

 

[LIN_JOEL]

Hi, may I know regarding the PVC pipe insulator, do they covered the joint angle as well or let it exposed?

 

[petetherock]

It takes about 2-4 min to cool my room down to 26c with my 18k BTU unit.. on auto mode.. it blows hard then it goes quite quiet in sustained use...

 

[gravityz3r0]

Anyone using Hitachi aircon now? Mind to share your experience? Am intrigued with the Frost Clean feature thingy. Just worry about serviceability in the future. Thanks!

 

[obichacha]

Anyone using Hitachi aircon now? Mind to share your experience? Am intrigued with the Frost Clean feature thingy. Just worry about serviceability in the future. Thanks!

You have to concern about teardown for cleaning on fan blower with aluminium coil fin as well.

 

[gravityz3r0]

You have to concern about teardown for cleaning on fan blower with aluminium coil fin as well.

Exactly what I'm thinking, the blower will be a higher concern than the fins, but from youtube video the removal seems pretty straight forward. At least it doesn't seems more complicated than my current starmex.

The fins are almost impossible to clean in regular aircon on your own as the grimes will build up over time no matter how well you maintain your FCU and eventually choke the airflow .

 

[Jun Jun]

How is fujitsu airstage? Looking at the black one. 5 years warranty looks interesting.

 

[hkchew03]

How is fujitsu airstage? Looking at the black one. 5 years warranty looks interesting.

5 years warranty on FCU? or compressor only? 5 years on compressor is pretty standard.

 

[007Mi6]

5 years warranty on FCU? or compressor only? 5 years on compressor is pretty standard.

Fujitsu had this 5 years warranty for system 2 and above for some time (at least a few months for my knowledge) .

it covers parts, labour. Includes the PCB and all, not just compressor.

 

[Jun Jun]

5 years warranty on FCU? or compressor only? 5 years on compressor is pretty standard.

Full warranty. It is stated on their website

 

[Andy0601a]

Good day All,

Looking to replace my 7 year old Daikin aircon, let's just say, didn't have a good experience, especially with the master bedroom always not cold, my common room is okay.

To be honest, not sure what's the issue here, undersizing etc or workmanship, but spent a lot of unnecessary money on it post install.

Old HDB built in the 90s with bigger rooms, also, because of the floor and design, my compression won't get rained on, so sometimes when heavy rain I will manually spray down my compressor.

Have to put the thought of adding another compressor for the living room on hold since the main switch is the older non upgraded one, so only 1 compressor, anything else I need to take note? e.g power output concerns?

Existing:
3MKS50FSG
FTKS25DVM x 2 (1 Master bedroom, 1 Common Room)

Intend to redo all the cabling and add 1 indoor unit for another room.

Which option should I go for, Ideally? Typical usage, 3 running simultaneously during bedtime, daytime much lesser, maybe 1 or 2 unit, unless weekend usage, thanks in advance!

Option 1:
MXY-3H28VG
MSXY-FP10VG x 3 (1 Master Bedroom, 2 Common Room)

Option 2:
MXY-3H28VG
MSXY-FP13VG x 1 (Master Bedroom)
MSXY-FP10VG x 2 (2 Common Room)

Option 3:
MXY-4H33VG
MSXY-FP13VG x 1 (Master Bedroom)
MSXY-FP10VG x 2 (2 Common Room)

 

[obichacha]

Good day All,

Looking to replace my 7 year old Daikin aircon, let's just say, didn't have a good experience, especially with the master bedroom always not cold, my common room is okay.

To be honest, not sure what's the issue here, undersizing etc or workmanship, but spent a lot of unnecessary money on it post install.

Old HDB built in the 90s with bigger rooms, also, because of the floor and design, my compression won't get rained on, so sometimes when heavy rain I will manually spray down my compressor.

Have to put the thought of adding another compressor for the living room on hold since the main switch is the older non upgraded one, so only 1 compressor, anything else I need to take note? e.g power output concerns?

Existing:
3MKS50FSG
FTKS25DVM x 2 (1 Master bedroom, 1 Common Room)

Intend to redo all the cabling and add 1 indoor unit for another room.

Which option should I go for, Ideally? Typical usage, 3 running simultaneously during bedtime, daytime much lesser, maybe 1 or 2 unit, unless weekend usage, thanks in advance!

Option 1:
MXY-3H28VG
MSXY-FP10VG x 3 (1 Master Bedroom, 2 Common Room)

Option 2:
MXY-3H28VG
MSXY-FP13VG x 1 (Master Bedroom)
MSXY-FP10VG x 2 (2 Common Room)

Option 3:
MXY-4H33VG
MSXY-FP13VG x 1 (Master Bedroom)
MSXY-FP10VG x 2 (2 Common Room)

Option 1 and 2, very sufficient. (28VG sufficiently to support up to 10,10,18 max)
Pointless to get 4H33VG, that is wasted money only

 

[007Mi6]

Good day All,

Looking to replace my 7 year old Daikin aircon, let's just say, didn't have a good experience, especially with the master bedroom always not cold, my common room is okay.

To be honest, not sure what's the issue here, undersizing etc or workmanship, but spent a lot of unnecessary money on it post install.

Old HDB built in the 90s with bigger rooms, also, because of the floor and design, my compression won't get rained on, so sometimes when heavy rain I will manually spray down my compressor.

Have to put the thought of adding another compressor for the living room on hold since the main switch is the older non upgraded one, so only 1 compressor, anything else I need to take note? e.g power output concerns?

Existing:
3MKS50FSG
FTKS25DVM x 2 (1 Master bedroom, 1 Common Room)

Intend to redo all the cabling and add 1 indoor unit for another room.

Which option should I go for, Ideally? Typical usage, 3 running simultaneously during bedtime, daytime much lesser, maybe 1 or 2 unit, unless weekend usage, thanks in advance!

Option 1:
MXY-3H28VG
MSXY-FP10VG x 3 (1 Master Bedroom, 2 Common Room)

Option 2:
MXY-3H28VG
MSXY-FP13VG x 1 (Master Bedroom)
MSXY-FP10VG x 2 (2 Common Room)

Option 3:
MXY-4H33VG
MSXY-FP13VG x 1 (Master Bedroom)
MSXY-FP10VG x 2 (2 Common Room)

If you look at 3 FCU setup of 4H33VG in the technical table, it is virtually the same output as the 3H28VG.

before changing, need to check why master bedroom always not cold? Else similar issue could be back with new aircon

 

[Andy0601a]

Option 1 and 2, very sufficient. (28VG sufficiently to support up to 10,10,18 max)
Pointless to get 4H33VG, that is wasted money only

can you elaborate please? I am just following the rated kW on the brochure, e.g MXY-3H28VG max is 8.9, MSXY-FP10VG x 2 and MSXY-FP13VG x 1 would total 9.1

https://www.mitsubishielectric.com....itioning-residential/starmex-r32-multi-split/

If you look at 3 FCU setup of 4H33VG in the technical table, it is virtually the same output as the 3H28VG.

before changing, need to check why master bedroom always not cold? Else similar issue could be back with new aircon

Can you please elaborate? What do I look out for specifically in the table? the capacity looks higher, apologies I look at it layman, a tad lost looking at the datasheet.

I have engaged Daikin and multiple other 3rd party, non can really tell me why, probably under sized aircon or poor workmanship? how do I check why master bedroom not cold? I have ran out of ideas.

 

[Andy0601a]

My blk is doing HIP now, toilet upgrade etc.

Understand they are upgrading the electrical load as well, that will probably take another 2-3 years?

Is there anything I need to take into consideration here? The old electrical loading affects the performance of the compressor?

 

[Alphas]

My blk is doing HIP now, toilet upgrade etc.

Understand they are upgrading the electrical load as well, that will probably take another 2-3 years?

Is there anything I need to take into consideration here? The old electrical loading affects the performance of the compressor?

Older HDB flat can accommodate one aircon system. However, when there are two aircon systems, each will need a 20A circuit breaker, then it can exceed the electrical loading.

 

[obichacha]

can you elaborate please? I am just following the rated kW on the brochure, e.g MXY-3H28VG max is 8.9, MSXY-FP10VG x 2 and MSXY-FP13VG x 1 would total 9.1

https://www.mitsubishielectric.com....itioning-residential/starmex-r32-multi-split/



Can you please elaborate? What do I look out for specifically in the table? the capacity looks higher, apologies I look at it layman, a tad lost looking at the datasheet.

I have engaged Daikin and multiple other 3rd party, non can really tell me why, probably under sized aircon or poor workmanship? how do I check why master bedroom not cold? I have ran out of ideas.

Check page 25
https://www.mitsubishielectric.com....6bd0fbbfde6c/Starmex-R32-Details-Nov-2023.pdf

28VG and 33VG (10+10+18) both are more or less same capacity output.
6.2kw x 3048 = 18.9k btu vs 6.5kw x 3048 = 19.8k btu got any different?
Both maximum capacity 8.9kw x 3048 = 27k btu.

 

[ZacharyA]

Check page 25
https://www.mitsubishielectric.com....6bd0fbbfde6c/Starmex-R32-Details-Nov-2023.pdf

28VG and 33VG (10+10+18) both are more or less same capacity output.
6.2kw x 3048 = 18.9k btu vs 6.5kw x 3048 = 19.8k btu got any different?
Both maximum capacity 8.9kw x 3048 = 27k btu.

Can you share what does 3048 mean?

 

[007Mi6]

can you elaborate please? I am just following the rated kW on the brochure, e.g MXY-3H28VG max is 8.9, MSXY-FP10VG x 2 and MSXY-FP13VG x 1 would total 9.1

https://www.mitsubishielectric.com....itioning-residential/starmex-r32-multi-split/



Can you please elaborate? What do I look out for specifically in the table? the capacity looks higher, apologies I look at it layman, a tad lost looking at the datasheet.

I have engaged Daikin and multiple other 3rd party, non can really tell me why, probably under sized aircon or poor workmanship? how do I check why master bedroom not cold? I have ran out of ideas.

https://www.mitsubishielectric.com....6bd0fbbfde6c/Starmex-R32-Details-Nov-2023.pdf

Page 18, the nominal cooling rating of the outdoor unit 3H28VG is 6.5kW cooling capacity and 4H33VG 6,9kW cooling capacity.

Page 25 and 27, if you read the table, whether is the 3H28VG or 4H33VG, with 10/10/13 configuration, the nominal output which is also the most efficient and stable output, is not much difference at 6.2kW cooling and 6.5W of cooling for both condensers.


There is no good reason to upgrade in this case as you are only using 3 FCU.