Selection Procedure - Daikin VRV IV REYQ72TATJA Design Manual

REYQ-TATJA / TAYDA

22. Selection Procedure

22.1 Selection Procedure
22.1.1 Flowchart
[1] Given conditions
[2] Selection of indoor units
Indoor unit capacity corrected for indoor air temperature (WB) ≥ Required heat load × Safety factor for the indoor units
[3] Selection of outdoor unit
Given Conditions:
· Design temperature and humidity (indoor & outdoor)
· Required heat load of each room
· System peak load (if necessary)
· Piping length, level difference
· Specifications of indoor units (type and number)
Define safety factor for the indoor units and outdoor unit
Define required total heat load to outdoor unit
1) Use the sum of the peak load of each room
Provisionally select outdoor unit type and size based on limitation of connection ratio
Confirm that the number of indoor units connected to the outdoor unit is within limitation.
Correct for cooling & heating capacity of the outdoor unit by the following items
-Outdoor air temperature
-Indoor air temperature
-Connection ratio
Corrected capacity of the outdoor unit ≥ Required total heat load to the outdoor unit
VRV system selection is complete.
2) Use the system peak load
-Piping length, level difference
-Piping heat loss
-Safety factor for the outdoor unit
-Defrost (only for heating capacity)
Yes
71
EDUS371704C-D
No