Relacker 1 Report post Posted December 1, 2009 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 Share this post Link to post Share on other sites
yoongf 11 Report post Posted December 1, 2009 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?? Share this post Link to post Share on other sites
Relacker 1 Report post Posted December 2, 2009 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 Share this post Link to post Share on other sites
yoongf 11 Report post Posted December 2, 2009 What is the spec for each outdoor unit? Share this post Link to post Share on other sites
Relacker 1 Report post Posted December 2, 2009 i think is multi sys 3 RASm20/10nkx3 single split RAS24N2Ax/RAS24NKPX4 Share this post Link to post Share on other sites
yoongf 11 Report post Posted December 2, 2009 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. Share this post Link to post Share on other sites
Relacker 1 Report post Posted December 3, 2009 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 Share this post Link to post Share on other sites
purecat 0 Report post Posted December 7, 2009 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 . Share this post Link to post Share on other sites
William Liu 0 Report post Posted January 6, 2010 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) Share this post Link to post Share on other sites
Relacker 1 Report post Posted January 7, 2010 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 Share this post Link to post Share on other sites
