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Installation
Installer and user reference guide
66
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
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Action
2
Determine parameter C:
▪
N=5
▪
8 HP: N≥4 => C1=N×0.1=5×0.1 kg
▪
12 HP: N<6 => C2=0 kg
=> C=C1+C2=0.5 kg
Metric piping.
When using metric piping, replace the weight factors in the formula
by the ones from the following table:
Inch piping
Metric piping
Piping
Weight factor
Piping
Weight factor
Ø6.4 mm
0.022
Ø6 mm
0.018
Ø9.5 mm
0.059
Ø10 mm
0.065
Ø12.7 mm
0.12
Ø12 mm
0.097
Ø15.9 mm
0.18
Ø15 mm
0.16
Ø16 mm
0.18
Ø19.1 mm
0.26
Ø18 mm
0.24
Ø22.2 mm
0.37
Ø22 mm
0.35
Connection ratio requirements.
When selecting indoor units, the connection ratio
must comply with the following requirements. For more information, see the
technical engineering data.
Other combinations than those mentioned in the table are not allowed.
Indoor units
Total CR
(a)
CR per type
(b)
VRV DX
RA DX
LT Hydrobox
AHU
VRV DX
50~130%
50~130%
—
—
—
VRV DX +
RA DX
80~130%
0~130%
0~130%
—
—
RA DX
80~130%
—
80~130%
—
—
VRV DX + LT
Hydrobox
50~130%
50~130%
—
0~80%
—
VRV DX +
AHU
50~110%
50~110%
—
—
0~60%
AHU
90~110%
—
—
—
90~110%
(a)
Total CR = Total indoor unit capacity connection ratio
(b)
CR per type = Allowable capacity connection ratio per indoor unit type
Summary of Contents for VRV IV+
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