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Optimized (mixed)
It is important to avoid defining a project as a ‘heat recovery job’ or ‘heat
pump job’. There are often applications where a mixture of both types is the
best design practice - and can reduce costs to the client.
Note:
The use of heat recovery does not always mean a branch selector box
for each for each indoor unit or even each area – this is a good way to reduce
costs further without compromising flexibility.
When to use MULTIPLE MODULES
There are several advantages to linking VRV condensing units together:
Less piping & total refrigerant needs, superior efficiencies due to more
outdoor unit heat exchange surface area at partial load and a greater
likelihood of heat recovery (on 3-pipe) to occur due to increase in varying
zones on the systems.
Note:
This design option is often overlooked due to refrigerant limitations
in small spaces set by ASRAE Std. 15
Current ASHRAE Std. 34 Regulations:
26lbs of R410A refrigerant
per 1000ft³
(0.026lbs/ft³) in normal occupancies.
Summary of Contents for VRV
Page 1: ...VRV Reference Guide ...
Page 4: ......
Page 5: ...System Overview ...
Page 18: ...Piping and Electrical Wiring Guide Condensing Unit Pipe Connections 18 ...
Page 22: ......
Page 23: ...System Selection ...
Page 41: ...Design Optimization ...
Page 53: ...Controls Standards ...
Page 65: ...65 Notes ...
Page 66: ...66 Notes ...
Page 67: ......
