12
3P362438-5N English
Maximum
allowable
length
From outdoor unit (*4)
to indoor unit
Actual piping length
Actual piping length from the outdoor unit (*4) to the indoor unit: ≤540 ft. (165 m)
(Example)
4
: a+d+g+i≤540 ft. (165 m),
7 : a+b+c+
+m+o≤540 ft. (165 m),
8
: a+b+c+p≤540 ft. (165 m)
Equivalent length
Equivalent piping length from the outdoor unit (*4) to the indoor unit: ≤623 ft.
(190 m) (*6)
(Calculate the equivalent piping length for the REFNET joint as 1.6 ft. (0.5 m),
REFNET header as 3.3 ft. (1 m), BS4
•
6Q54TVJ as 19 ft. (6 m), BS8 to 12Q54TVJ
as 33 ft. (10 m), BSQ36
•
60TVJ as 13 ft. (4 m), and BSQ96TVJ as 19 ft. (6 m).)
Total extension
Total actual piping length from the outdoor unit (*4) to all indoor units: ≤3280 ft.
(1000 m)
From first outdoor unit
multi connection pip-
ing kit to outdoor unit
(in a multi system)
Actual piping length
Equivalent length
Actual piping length from the first outdoor unit multi connection piping kit to the
outdoor unit: ≤33 ft. (10 m)
Equivalent piping length from the first outdoor unit multi connection piping kit to the
outdoor unit: ≤43 ft. (13 m)
Outdoor unit
r
t
s
u
r≤33 ft. (10 m) (equivalent length≤43 ft. (13 m))
u+s≤33 ft. (10 m) (equivalent length≤43 ft. (13 m))
u+t≤33 ft. (10 m) (equivalent length≤43 ft. (13 m))
Allowable
height differ-
ence
From outdoor unit to
indoor unit
Height difference
Height difference between outdoor unit and indoor unit (H1): ≤164 ft. (50 m) (if
outdoor unit is lower than indoor unit, ≤130 ft. (40 m)) (*7)
From indoor unit to
indoor unit
Height difference
From outdoor unit to
outdoor unit
Height difference
Height difference between outdoor units (H3): ≤16 ft. (5 m)
Allowable length after branch (*5)
Actual piping length
Actual piping length from the first REFNET joint or REFNET header to indoor
unit: ≤130 ft. (40 m) (*8)
(Example)
4
: d+g+i≤130 ft. (40 m),
7 : b+c+
+m+o≤130 ft. (40 m),
8
: b+c+p≤130 ft. (40 m)
(*4) In the case of an outdoor units multi system, “outdoor unit” should be read as the “first outdoor unit multi connection piping kit”, seen from the
indoor units side.
(*5) In the case of a multi Branch Selector unit, it should be read as the “REFNET header”, and the allowable length of piping should be selected.
In the case where only 1 multi Branch Selector unit is included in the system, the actual piping length from each branch points of the multi
Branch Selector unit to each indoor units should be ≤130 ft. (40 m).
(*6) In the case where the equivalent piping length from outdoor units to indoor units ≥295 ft. (90 m), make sure to upsize the liquid pipe of the main
pipe (see the figure below), referring to the table below. (Do not upsize the high/low pressure gas pipe and the suction gas pipe.)
Outdoor unit capacity type
Liquid pipe
Main pipe
Upsize the liquid pipe
First refrigerant
branch kit
Branch
Selector
units
Indoor
units
Outdoor units
REYQ72, 96T type
f
3/8 in. (9.5 mm)
→
f
1/2 in. (12.7 mm)
REYQ120, 144T type
f
1/2 in. (12.7 mm)
→
f
5/8 in. (15.9 mm)
REYQ168-240T type
f
5/8 in. (15.9 mm)
→
f
3/4 in. (19.1 mm)
REYQ264-456T type
f
3/4 in. (19.1 mm)
→
f
7/8 in. (22.2 mm)
(*7) It can be extended to ≤295 ft. (90 m) with liquid piping of main size up for equivalent length from outdoor to indoor units over 295 ft. (90 m) in this
page) (if outdoor unit is lower than indoor unit, ≤195 ft. (60 m) by field setting [2-35] on page 35). See [2-49] = Height difference setting on page
36.
Actual piping length X Height difference between indoor units (H2)
X ≤ 540 ft.
(165 m)
≤ 49 ft.
(15 m)
X ≤ 390 ft.
(120 m)
≤ 98 ft.
(30 m)
01_EN_3P362438-5N.indb 12
12/11/2019 11:23:41 AM
