Capacity Correction Factor - Daikin VRV III Technical Data Manual

4 Capacity tables

4 - 3 Capacity Correction Factor

REYAQ10P
1. Rate of change in heating capacity
Equivalent piping length (m)
[Explanation of symbols]
Hp: Level difference (m) between indoor and outdoor unit (outdoor unit is on highest location)
Hm: Level difference (m) between indoor and outdoor unit (outdoor unit is on lowest location)
NOTES
[Capacity correction]
1. These figures illustrate the rate of change in capacity ( ) of a standard indoor unit system at maximum load under standard conditions.
Moreover, under partial load conditions there is only a minor deviation from the rate of change in capacity shown in the fi gures above.
2. With this outdoor unit, constant evaporating pressure control during cooling and constant condensing pressure control during heating is carried out.
3. Method of calculating capacity (connection ratio 100%)
[Capacity] = [Capacity under 100% connection ratio (capacity table)] X (correction factor for capacity ( ) due to piping length to farest indoor unit]
Method of calculating capacity (connection ratio > 100%)
[Capacity] = [Capacity under xxx% connection ratio (capacity table)] X (correction factor for capacity ( ) due to piping length to farest indoor unit]
[Equivalent piping length correction]
4. When overall equivalent piping length is 90m or more, the diameter of the main liquid pipes must be increased.
5. [Overall equivalent piping length] = [equivalent piping length to main pipe] X [correction factor ( )] + [equivalent length after branching]
Model Liquid
standard
REYAQ10P 9.5 Ø
[EXAMPLE]
Equivalent length
Liquid pipe: Size increase
Outdoor unit
A. Overall equivalent piping length = 60m X 0.2 + 30 = 42m (heating; =0.2)
B. Overall equivalent piping length = 60m X 0.5 + 30 = 60m (cooling; =0.5)
C. The correction factor for capacity when H=0m: = 1 (heating)
D. The correction factor for capacity when H=0m: = 0.91 (cooling)
®
• Outdoor Unit • VRV III heat recovery, with connection to heating only hydrobox • REYAQ-P
Liquid Correction factor ( )
increased (heating)
12.7 Ø 0.2
Equivalent length
60m 30m
Branch
®
• VRV Systems • Outdoor Unit
2. Rate of change in cooling capacity
Equivalent piping length (m)
Correction factor ( )
(cooling)
0.5
Indoor
3TW60652-2A
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