Air conditioning - Any recommendations please?? - Part 2

[ZacharyA]

If you look at a physical Armaflex insulator, how you know its 1/4, 1/2 or 3/4? For me, I use ruler to check the thickness.
How about the copper coil, how you know its SWG 21 or 22? I only saw this written on the LHCT Package 06.35x0.81-15m.
Oh wait, Coolserve guy just reply and told me 0.81 mean SWG 21.

My account cannot upload photo.

It is usually written on the outer layer of the insulation. The dimensions and specifications.

For copper pipe, unless they bring balanced coil (used halfway). They will most definitely bring new ones as well (3-4 bundles or more depending how many FCUs you installing. The brand new copper pipes have a white stick on it labelling its specifications as well.

If you are not physically there at the day of installation, you can request installer to take pic and show you before installation.

Unless of course you afraid he take picture of 1, and use a lower grade when installing (which is unlikely but not impossible), then you better schedule a day where you can be at home to supervise.

 

[The_King]

Can I check is it normal that aircon set to 16 deg max fan speed and leaving it auto swing yet it will stop within 1h or so? Starmex. Aircon is 6 mth old only

it not normal to set your ac at 16c, you add stress to your compressor and it will be on full load trying to reach the impossible temp of 16c

for swing i no idea, maybe someone can help, me just fix to a certain angle can liao

 

[a4973]

it not normal to set your ac at 16c, you add stress to your compressor and it will be on full load trying to reach the impossible temp of 16c

for swing i no idea, maybe someone can help, me just fix to a certain angle can liao

To add on, if one has to set the temp to 16c in order to feel cool / cold likely the unit is badly in need of cleaning and maintenance and it overstressed and shut down.

 

[The_King]

Can I check is it normal that aircon set to 16 deg max fan speed and leaving it auto swing yet it will stop within 1h or so? Starmex. Aircon is 6 mth old only

if your ac have been cleaning regularly and still need to set 16c , i suggest you get starmax itself to check. their number can get from their websites

 

[IAmChiobu12M]

it not normal to set your ac at 16c, you add stress to your compressor and it will be on full load trying to reach the impossible temp of 16c

for swing i no idea, maybe someone can help, me just fix to a certain angle can liao

I don't set it to 16 on normal basis just that ever since installation the technician did a bad job keep got issue. So I just wanted to try and spot if still got error get them fix it. Due to their sloppy work already fix 4 times. So I just wanted do some final stress test. And my aircon is new.

1st error major leakage
2nd error bang my compressor until a dent
3rd error minor multiple leakage
4th error hot air not cold at all
5th potential error, set to auto swing but won't swing after a while

Knn. The most horrible service and every appointment come late 2h. During installation or fixing and will always whole team go mia 1h for break undeclared right in front of my eyes. Simple task can drag many hours until 12am.

 

[ZacharyA]

I don't set it to 16 on normal basis just that ever since installation the technician did a bad job keep got issue. So I just wanted to try and spot if still got error get them fix it. Due to their sloppy work already fix 4 times. So I just wanted do some final stress test. And my aircon is new.

1st error major leakage
2nd error bang my compressor until a dent
3rd error minor multiple leakage
4th error hot air not cold at all
5th potential error, set to auto swing but won't swing after a while

Knn. The most horrible service and every appointment come late 2h. During installation or fixing and will always whole team go mia 1h for break undeclared right in front of my eyes. Simple task can drag many hours until 12am.

New AC should feel cold @ 24 or 25 degrees. If 24 degrees and max fan speed when first turned on isn't cold already, that means something is wrong somewhere, maybe low refrigerant pressure or compressor fan or motor. I don't know.

 

[The_King]

I don't set it to 16 on normal basis just that ever since installation the technician did a bad job keep got issue. So I just wanted to try and spot if still got error get them fix it. Due to their sloppy work already fix 4 times. So I just wanted do some final stress test. And my aircon is new.

1st error major leakage
2nd error bang my compressor until a dent
3rd error minor multiple leakage
4th error hot air not cold at all
5th potential error, set to auto swing but won't swing after a while

Knn. The most horrible service and every appointment come late 2h. During installation or fixing and will always whole team go mia 1h for break undeclared right in front of my eyes. Simple task can drag many hours until 12am.

i think get starmex itself to check and tell them what happen, see if they can help or advise

 

[freeloadx]

seeking some advice. i'm looking to change my single split starmax 12k BTU FCU only, as the condenser is still working fine.

considering to get a refurbished FCU, but it is the 12k BTU FN series (i.e. milti split). Any issues with connecting this to my single split condenser?

 

[wacko]

seeking some advice. i'm looking to change my single split starmax 12k BTU FCU only, as the condenser is still working fine.

considering to get a refurbished FCU, but it is the 12k BTU FN series (i.e. milti split). Any issues with connecting this to my single split condenser?

are you able to find an aircon contractor who is willing to do this for you?

 

[SuperClubby]

Can I check is it normal that aircon set to 16 deg max fan speed and leaving it auto swing yet it will stop within 1h or so? Starmex. Aircon is 6 mth old only

9-5. AUTO VANE OPERATION

(4) VANE AUTO mode
In VANE AUTO mode, the microprocessor automatically determines the vane angle to make the optimum room temperature distribution.

AUTO → 1 → 2 → 3 → 4 → 5 → SWING Horizontal position
In COOL and DRY operation Vane angle is fixed to Horizontal position.

(6) Dew prevention
During COOL or DRY operation with the vane angle at Angle 4 or 5 when the compressor cumulative operation time exceeds 1 hour, the vane angle automatically changes to Angle 3 for dew prevention.

I don't set it to 16 on normal basis just that ever since installation the technician did a bad job keep got issue. So I just wanted to try and spot if still got error get them fix it. Due to their sloppy work already fix 4 times. So I just wanted do some final stress test. And my aircon is new.

1st error major leakage
2nd error bang my compressor until a dent
3rd error minor multiple leakage
4th error hot air not cold at all
5th potential error, set to auto swing but won't swing after a while

Knn. The most horrible service and every appointment come late 2h. During installation or fixing and will always whole team go mia 1h for break undeclared right in front of my eyes. Simple task can drag many hours until 12am.

All these issues point back down to shoddy workmanship from the installation team.
Better pray the pipes can hold the pressure, drain pipe done up properly and last a couple of years... Else it's going to cause more issues/headaches down the road.

These types of contractors should just go fly kite.

 

[The_King]

@IAmChiobu12M

Worst come to worst, get another installer to redo everything

Remove trunking, replace copper pipe to new one, re vacuum the pipe

 

[LWZ]

Knn. The most horrible service and every appointment come late 2h. During installation or fixing and will always whole team go mia 1h for break undeclared right in front of my eyes. Simple task can drag many hours until 12am.

Midnight ?! Wouldn't this affect neighbours

 

[Windowlover]

Normally 24~25deg already sufficient and able to feel cool.. unless you want to be in winter everyday ..

 

[Techno Pride]

Workmanship is the most important factor for aircon installation.

A lot of the complains here and elsewhere are due to workmanship issues and not material. Unless the company has no reputation, unlikely they'll cheap out on materials and use something lower spec than the stated requirement. I'd say some companies even like to push higher spec materials just as a way to earn more margin, but they know it doesn't have any real world benefit to the consumer

There's a lot of things in workmanship that can go wrong.

1 example - for new installation, is the complete refrigerant pipe network under full vacuum for at least 30 minutes to one hour to remove all moisture in the refrigerant line? The smallest amount of moisture in the line will significantly cripple the cooling ability.

Some installers may do the vacuum step, but not with a good, well maintained vacuum pump that can actually achieve true vacuum.

Or they just do a quick 5 minute job, and the moisture is not completely evacuated out from the line. This vacuum step is compulsory and actually taught to trained Mitsubishi aircon techs.

Second example.. is the insulation material securely and tightly wrapped around the pipes to ensure complete, 360 degree coverage? If it's loose then there will be condensation and eventually water starts leaking out of the trunking.

The list goes on... I would say when aircon shopping, never only look at on-paper specs, but reputation of the company. A lot of companies are low priced for a reason - a bad reason.

Any comments about the Daikin Proshops? Looking at one of the shops for: compressor 20k btu, plus 2x9000btu

DAIKIN SYSTEM 2 AIRCON - WIFI MKM50VVMG/2XCTKM25VVMG​

 

[Techno Pride]

There is a nominal, minimum and maximum rating of cooling for all condensers.

Nominal means what it should normally and usually cool at. Maximum is it max out the cooling capacity to cool the room.

For MKM50, the nominal cooling for 2x 8.5K BTU FCU (listed as 9K) is 14.3K BTU, with the maximum at 18K BTU running at 1.49kW electricity. This up to 18K BTU is not sustained as it could run for 20-30mins (Starmex is programmed to be like that)

With MKM75, the nominal with 2x 8.5K BTU FCU (listed as 9K) is already 17K BTU running at 1.22kW electricity. It has the capacity to go all the way to 22.6K BTU at 2.32kW electricity on hot days.

In short, a higher capacity condenser is (1) less taxing to the system and (2) gives you more stable and sufficient cooling.

I don't fully understand the terms. Are you saying that the MKM50 can sustain 2x9k BTU in short bursts only? While the MKM75 can sustain 2x9k BTU continuously?

 

[Care&Share]

I got a feeling most of them are buying from gain city. Because I check gain city price, is almost comparable if not cheaper...

Cheaper but workmanship problem.

The box line holding the insulation ugly, made worse by condensation leaks.

Poor drill through into toilet leaving many cracks which they patched but uglily.

 

[Care&Share]

Second example.. is the insulation material securely and tightly wrapped around the pipes to ensure complete, 360 degree coverage? If it's loose then there will be condensation and eventually water starts leaking out of the trunking.

Oh! So this is what likely happens to my Gain City installation for which I top-up for best Insulation & Materials 10 years ago, yet there were condensation leaks to such extent we've had to wipe the pipeline twice a day for past 10 years as they merely rectify by opening box to insert newspaper inside to absorb moisture. The walls in 3 rooms are black with fungus from the internal leaks.

 

[The_King]

I don't fully understand the terms. Are you saying that the MKM50 can sustain 2x9k BTU in short bursts only? While the MKM75 can sustain 2x9k BTU continuously?

Like say your nornal jogging speed is 8km/hr which you jog at this speed for 4hr with no problem

But if I ask you to jog at 40km/hr, you sure cannot jog for 4hr without stopping at that speed. 1 to 5min sure no issues

 

[The_King]

Oh! So this is what likely happens to my Gain City installation for which I top-up for best Insulation & Materials 10 years ago, yet there were condensation leaks to such extent we've had to wipe the pipeline twice a day for past 10 years as they merely rectify by opening box to insert newspaper inside to absorb moisture. The walls in 3 rooms are black with fungus from the internal leaks.

Finding a good installer is hard.

Mine 1.7yr liao, inside trunking dry (touch wood) if after 1yr from now still same no workmanship problem

I think will get them to install 2nd condenser

 

[seowbin]

Just realized there's a leak detector for Aircon . Any idea which Aircon repair guy uses it ? My parent's place Aircon leaked. Waited for the additional 100 dollars climate voucher then realized actually they can go around doing such test...

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