Daikin VRV IV+ Installer And User Reference Manual page 65

RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
(b)
Piping length
>30 m
(a) In case of a multi-outdoor-unit system, add the sum of the individual outdoor unit
charge factors.
(b) Piping length is considered the distance from the outdoor unit to the farthest indoor
unit
CR Total indoor unit capacity connection ratio
▪ Parameter B:
RYYQ8~12
1.4 kg
(a) ONLY required for RYYQ8~20 models, NOT for RXYQ8~54 and RYYQ22~54.
▪ Parameter C:
Model
If
8 HP N≥4
10 HP N≥5
12 HP N≥6
14 HP N≥7
16 HP N≥8
18 HP N≥9
20 HP N≥10
(a) In case of a multi-outdoor-unit system, add the sum of the individual outdoor unit
charge factors.
CR Total indoor unit capacity connection ratio
N Number of VRV DX and RA DX indoor units connected to the outdoor unit
Parameter C – Example with multiple outdoor units:
500
8 HP 12 HP
200 300
#
1 Determine the connection ratio:
▪ Total outdoor unit capacity class = 500
▪ Total indoor unit capacity class = 550
=> CR≥100%
Parameter A
CR
50%≤CR≤70%
70%<CR≤85% 0.3 kg
85%<CR≤105% 0.7 kg
105%<CR≤130% 1.2 kg
Parameter B
RYYQ14
1.7 kg
Parameter C
CR≥100%
Then
C=N×0.1 kg
550
125 125 125 125 50
Action
6 Installation
|
(a)
A
8 HP 10~14 HP
0 kg
0.5 kg
1.0 kg
1.5 kg
(a)
RYYQ16 RYYQ18 + RYYQ20
1.2 kg 2.0 kg
(a)
If Then
N<4 C=0 kg
N<5
N<6
N<7
N<8
N<9
N<10
Installer and user reference guide
16~20 HP
0.5 kg
1.0 kg
1.5 kg
2.0 kg
CR<100%
C=0 kg
65