Colt Caloris

[Peter_1]

Anyone experience with this system? http://www.coltinfo.co.uk/products/w...-pump-caloris/
Can you speak about a VRF/VRV system with this concept?

[install monkey]

http://commercialheating.mitsubishie...rce_heat_pumps
air to air heatpumps-have to be locked into heating only to qualify for renewable green products

[The Viking]

There isn't much that is new under the sun...

From what I can tell from colt's website linked to above, this is another version of what we in UK know as Versatemp systems (Details HERE).

Over the years, I have looked after several sites with Versatemps in. They have the potential to work reasonably well and don't require A/C or refrigeration engineers to fit and maintain, any fitter/plumber can do it.
Unfortunately they don't require A/C or refrigeration engineers to fit and maintain. Any fitter can do it and this were their big downfall.

The Versatemps were really popular over here some 20 odd years ago before the Japanese gave us the VRV/VRF technology.

They claim fantastic efficiencies and energy savings but in real life there is a lot of compressors to start and stop and unless they have been designed/installed/controlled/commissioned properly there is the potential of short runtime cycles on the compressors.
There are also a lot of water/refrigerant heat exchangers to look after and unless the water treatment is good this can be a problem.

As the system grows older with runtimes and starts adding up on the compressors, instead of one compressor going down of old age you now got one per indoor unit +one (or more) for the system. My personal belief is also that starts/stops is worse for the compressors than steady run...
But, as long as the indoor units are accessible, there is less refrigerant to be reclaimed and a much smaller compressor to be lifted out/in.

In real life (but remember, this is compared to Versatemp) on the sites were we have replaced this type of system with VRV/VRF both the energy bills and the maintenance costs has been reduced.