17
|
Piping installation
Installer and user reference guide
75
RYYQ+RYMQ+RXYQ
VRV IV+ heat pump
4P546228-1C – 2021.11
17.1.5 About the piping length
Make sure to perform the piping installation within the range of the maximum
allowable pipe length, allowable level difference and allowable length after
branching as indicated below. Three patterns will be discussed, including VRV DX
indoor units combined with Hydrobox units or RA DX indoor units.
Definitions
Term
Definition
Actual piping length
Pipe length between outdoor
(a)
and indoor units.
Equivalent piping length
(b)
Pipe length between outdoor
(a)
and indoor units.
Total piping length
Total piping length from the outdoor
(a)
to all indoor
units.
H1
Difference in height between outdoor and indoor
units.
H2
Difference in height between indoor and indoor
units.
H3
Difference in height between outdoor and outdoor
units.
H4
Difference in height between outdoor and BP unit.
H5
Difference in height between BP unit and BP unit.
H6
Difference in height between BP unit and RA DX
indoor unit.
(a)
If the system capacity is a multi outdoor installation, re-read "the first outdoor branch as
seen from the indoor unit".
(b)
Assume equivalent piping length of refnet joint=0.5 m and refnet header=1 m (for
calculation purposes of equivalent piping length, not for refrigerant charge calculations).
17.1.6 Piping length: VRV DX only
For system only containing VRV DX indoor units:
System setup
Example
Description
Example 1.1
a
A
h
i
j
k
l
m
n
B
C
D
E
F
G
p
b
c
d
e
f
1
2
3
4
5
6
7
8
g
H1
H2
Single outdoor
Branch with refnet joint
Example 1.2
a
b
c
d
e
f
i
k
j
g
h
A
B
1
2
3
4
5
6
7 8
H1
H2
Single outdoor
Branch with refnet joint
and refnet header
Содержание RYYQ8U7Y1B
Страница 174: ......
Страница 175: ......
Страница 176: ...4P546228 1C 2021 11 Copyright 2018 Daikin Verantwortung f r Energie und Umwelt...