VRV Combination Ratio or Connection Ratio?
VRV Combination Ratio or Connection Ratio?
(OP)
HI
If any one can help me I want to know what is the Combination Ratio or the Connection ratio in VRV & VRF system?
Thanks
If any one can help me I want to know what is the Combination Ratio or the Connection ratio in VRV & VRF system?
Thanks





RE: VRV Combination Ratio or Connection Ratio?
Are you asking how many evaporator units can fit on a condenser system? Mitsubishi allows up to 130% capacity.
knowledge is power
RE: VRV Combination Ratio or Connection Ratio?
Your outdoor unit has nominal and maximal rating, while indoor units have something like maximum capacity they can have under certain conditions.
Sum of indoor units maximum ratings divided to outdoor unit maximum rating gives your connection ratio.
You have to remember that it does not mean you can reach sum of indoor maximums, it is only allowed conneciting. Maximum is defined by outdoor maximum.
This reflects reality of coincident loads. If you calculate coincident maximal load for system in your calculations, and maximums for all romms, difference will be large the larger number of rooms and the more different orientation.
What does this all means? It means you can save money by specifying outdoor unit on maximum coincident load, not on sum of indoor maximums, taking care that connection ratio is not exceeded.
RE: VRV Combination Ratio or Connection Ratio?
RE: VRV Combination Ratio or Connection Ratio?
Daikin and Sanyo understand this. LG does not. It is maddening.
www.ellisconsultingengineers.com
RE: VRV Combination Ratio or Connection Ratio?
Like daikin, now LG has also launched new version with 130% combination and solution for AHU/FAHU connectivity...
Cheers!!!
RE: VRV Combination Ratio or Connection Ratio?
RE: VRV Combination Ratio or Connection Ratio?
www.ellisconsultingengineers.com