Specifications
16
1-10. Tubing Length
Table 1-20 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights
LO1
Max. 40cm
Max. 40cm
40
6
5
4
LD LELC
LB
LM
L2
L1
H1
H2
3
2
1
LH
L4
LG
LF
LA
A
B
1.
2.
C
D
R410A distribution joint
DDVE135 (for outdoor unit)
DDVE68 (for outdoor unit)
DDVI135 (for indoor unit)
DDVI68 (for indoor unit)
DDVI16 (for indoor unit)
LO2
(ø9.52)
H3
L5
Sub
unit
Sub
unit
Sub
unit
Main
unit
Balance tubing
Explanation of symbols
Distribution joint
(DDVE & DDVI: purchased separately)
special tubing for R410A
Ball valve (BV: purchased
separately)
special valve for R410A
For
extension
For
extension
Main tubing length LM = LA + LB … ≤ 80 m
Main distribution tubes LC – LH are selected according to the capacity after the
distribution joint.
Sizes of indoor unit connection tubing 1 – 40 are determined by the connection
tubing sizes on the indoor units.
3.
Note:
Do not use commercially available T-joints for the liquid tubing and parts.
* Be sure to use special R410A distribution joints (DDV: purchased separately) for outdoor
unit connections and tubing branches.
D
C
B
A
NOTE
1: The tubing size (LO1, LO2) connecting the outdoor units to one another is decided by the total capacity of the
outdoor units connected at tubing ends. The LO1 tubing size is determined by the total capacity of the 3 sub
units B, C, and D, which are connected after main unit A. The LO2 tubing size is determined by the total capaci-
ty of sub units C and D, which are connected after sub unit B. Refer to Table 1-11a.
2: If the maximum tubing length (L1) exceeds 90 m (or equivalent length), increase the size of both the narrow
and wide main tubing (LM) by 1 step. However, the maximum wide tubing size is
φ
38.1. In addition, it is not
necessary to increase the tubing sizes in the case of a 6-horsepower system. (Tubing reducers must be
obtained in the field.)
Items Marks Contents Length (m)
L1 Max. tubing length
Actual length 150
Equivalent length 175
∆L (L2 – L4)
Difference between max. length and min.
40
length from the No.1 distribution joint
LM Max. length of main tubing (at max. diameter)
80
1
,
2
~
40
Max. length of each distribution tube 30
L1+
1
+
2
+~
40
Total max. tubing length including length of
300
A
+
B
+LF+LG+LH each distribution tube (only narrow tubing)
L5 Distance between PC and AD unit
10
H1
When outdoor unit is installed higher than indoor unit
50
When outdoor unit is installed lower than indoor unit
40
H2 Max. difference between indoor units 15
H3 Max. difference between outdoor units
4
L = Len
g
th, H = Hei
g
ht
Allowable tubing
length
>
>
Allowable elevation
difference
>
>
>
>
>
>
>
>
>
+
Select the installation location so that the length and size of refrigerant tubing are within the allowable range shown
in the figure below.
04-396 Inverter-W_a-p50 ARGO 12/21/04 9:38 AM Page 16