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Air conditioning - Any recommendations please??

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Old 17-03-2015, 09:58 PM   #5551
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Mind to share what existing unit brand and model & each room btu.
Cause I want to know why that seller can't installed for 4 system.

Thanks
Daiken inverter.
I don't know the exact model, but I have 2 instructions manual.
1. FTKD25DVM, FTKD35DVM
2. FTKD50BVM, FTKD60BVM, FTKD71BVM

I don't know the btu of each. The 2 living room units are the wider blower while the other 2 blowers in each of the bedrooms are smaller.

The seller just told me if the existing is system 2 x 2, I cannot just change to system 4..
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Old 17-03-2015, 10:14 PM   #5552
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Daiken inverter.
I don't know the exact model, but I have 2 instructions manual.
1. FTKD25DVM, FTKD35DVM
2. FTKD50BVM, FTKD60BVM, FTKD71BVM

I don't know the btu of each. The 2 living room units are the wider blower while the other 2 blowers in each of the bedrooms are smaller.

The seller just told me if the existing is system 2 x 2, I cannot just change to system 4..
Ok now i found that, ur setting for existing copper pipe size for 50 = 2hp & 60 = 2.5hp with 70 = 3hp that copper size too large, maybe not be suitable for system 4.

Look like the best set up to be change all copper pipe and rerun with tracking only.
To be save to hack off and re-concealed wall.

For example on system 4.
10k & 13k same copper size for 9mm & 6mm only
18k for 12mm & 6mm
26k btu for gas 15mm dia & 9mm dia for liquid size.

But your existing set up on Daikin
25 for 9mm & 6mm
35 for 12mm & 6mm
50 for 15mm & 6mm
60 for 15mm & 9mm
70 for 15mm & 9mm

Over here was different between the size and not suitable for system 4.

Last edited by kimsim; 17-03-2015 at 10:25 PM..
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Old 17-03-2015, 10:19 PM   #5553
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does the 1/2" or 3/8" thickness Armaflex Insulation matters?

I read it cost more to upgrade to thicker material.
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Old 17-03-2015, 10:21 PM   #5554
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Ok now i found that, ur setting for existing copper pipe side for 50 = 2hp & 60 = 2.5hp with 70 = 3hp that copper size too large, maybe not be suitable for system 4.

Look like the best set up to be change all copper pipe and rerun with tracking only.

To be save to hack off and re-concealed wall.
I see.. Then what if I change to system 2 x2 and use existing pipe?
Or still change the pipe better?
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Old 17-03-2015, 10:48 PM   #5555
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I see.. Then what if I change to system 2 x2 and use existing pipe?
Or still change the pipe better?
If wanna long runs the best way to be change all.
Then the warranty won't effected
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Old 17-03-2015, 11:04 PM   #5556
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Not sure about other electrical shops. GC compulsory must change pipeline, if not warranty not covered.
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Old 17-03-2015, 11:07 PM   #5557
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does the 1/2" or 3/8" thickness Armaflex Insulation matters?

I read it cost more to upgrade to thicker material.
I also wanted to know. Read it's more lasting but is it necessary ?
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Old 18-03-2015, 12:59 PM   #5558
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omg, aircon is really expensive.

was asking for mitsubishi brand, for 3 + 2. a whopping $8k - $10k...wt
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Old 18-03-2015, 01:01 PM   #5559
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omg, aircon is really expensive.

was asking for mitsubishi brand, for 3 + 2. a whopping $8k - $10k...wt
I guess you kena chop.

Cause if you qoute from proper, for sys 3 at 3k & 2.5k for sys 2.
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Old 18-03-2015, 04:16 PM   #5560
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I guess you kena chop.

Cause if you qoute from proper, for sys 3 at 3k & 2.5k for sys 2.
My quote is inclusive of change of piping.

$7080 for no change water pipes.
Heard that gain city r cheaper due to the more inferior piping use. Any experience ppl?
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Old 18-03-2015, 11:23 PM   #5561
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May I know which place quote you this price.....................
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Old 19-03-2015, 12:17 AM   #5562
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My quote is inclusive of change of piping.

$7080 for no change water pipes.
Heard that gain city r cheaper due to the more inferior piping use. Any experience ppl?
How much they quote you for change of piping?
Got the cost breakdown?
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Old 19-03-2015, 09:28 AM   #5563
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Gc and AB dun like to give breakdown. They only use standard pipe eg. 16mm water pipe n g23 copper. Can ask for g22 but abt 40-60 more per unit. Its not inferior but bloody more exp niah
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Old 19-03-2015, 10:44 AM   #5564
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To Grizz.P,

If you are doing renovations, its best to replace all the pipings @ the same time.
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Old 19-03-2015, 03:04 PM   #5565
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Dear all,

Any ideas where to get good air-con installation for Misubishi Electric system 4?
I want them to come onsite and see my current system 3 (quite complicated as the trunking go into built-in cupboard). thanks in advance.
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