i got sys 3 and another sys for living rm. the sys 3 is 900 btu for 3 rooms and the other 1200. but most of time only use 900 btu one, i like to now if possible for air con tech to install a switch such that i can switch between using 900 btu one and 1200 btu one.

cos the 1200 btu compressor most of time is left unuse unless guest come visit.

i feel wasted since so poweful and also exp but seldom use

my air con is Toshiba multi Syst 3 non-inverter + 1 single split unit non-inverter 24kBTU

possible to connect via valve that switch between the two pipes?

i would not mind paying a bit for the mod

No such switching device. There are 3 connections involved. Hot pipe, cold pipe, and the control wire.

I think your specs are incorrect. Impossible for Sys 3 to be a 9000 BTU compressor attached to 3 rooms.

The 12000BTU is connected to a 24K outdoor unit??

No such switching device. There are 3 connections involved. Hot pipe, cold pipe, and the control wire.

I think your specs are incorrect. Impossible for Sys 3 to be a 9000 BTU compressor attached to 3 rooms.

The 12000BTU is connected to a 24K outdoor unit??

yes 2 separate compressor

What is the spec for each outdoor unit?

i think is multi sys 3 RASm20/10nkx3

single split RAS24N2Ax/RAS24NKPX4

Your System 3 is already operating a 20K BTU compressor. Your configuration is the most energy efficient setup, where the bulk of the load is run off 1 compressor, instead of balancing off 2 compressors. It is very inefficient to operate 2 compressors nightly when 1 compressor can do the job.

Your System 3 is already operating a 20K BTU compressor. Your configuration is the most energy efficient setup, where the bulk of the load is run off 1 compressor, instead of balancing off 2 compressors. It is very inefficient to operate 2 compressors nightly when 1 compressor can do the job.

thks. think give up my idea since it is not so easy to mod

i got sys 3 and another sys for living rm. the sys 3 is 900 btu for 3 rooms and the other 1200. but most of time only use 900 btu one, i like to now if possible for air con tech to install a switch such that i can switch between using 900 btu one and 1200 btu one.

cos the 1200 btu compressor most of time is left unuse unless guest come visit.

i feel wasted since so poweful and also exp but seldom use

my air con is Toshiba multi Syst 3 non-inverter + 1 single split unit non-inverter 24kBTU

possible to connect via valve that switch between the two pipes?

i would not mind paying a bit for the mod

Was told by someone that if you are staying in hdb, two compressors are not allowed actually ? If HDB come to find out about it, they can request you to remove. so one more consideration if you are staying in HDB .

http://www.hdb.gov.sg/fi10/fi10205p.nsf/WP...on?OpenDocument

It depends on what kind of flat you are staying in, for those newer flats with aircon ledge think it's approved (check out the Drawing K)

Was told by someone that if you are staying in hdb, two compressors are not allowed actually ? If HDB come to find out about it, they can request you to remove. so one more consideration if you are staying in HDB .

no la, the new HDB flat have 2 1.5 A socket so ok