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