Tubing Length - Argo CAFM1V Series Installation Instructions Manual

04-408 InveterW_Techn_a-p50

1-10. Tubing Length

Select the installation location so that the length and size of refrigerant tubing are within the allowable range shown
in the figure below.
D
Sub Sub
unit unit
H3
D
Balance tubing
(ø9.52)
Explanation of symbols
Distribution joint
(K70A056 ~ 60Z: purchased separately)
special tubing for R410A
Ball valve (BV: purchased
separately)
special valve for R410A
Note: Do not use commercially available T-joints for the liquid tubing
* Be sure to use special R410A distribution joints (K70A056 ~ 60Z: purchased separately)
for outdoor unit connections and tubing branches.
Table 1-20 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights
Items
Allowable tubing
length
Allowable elevation
difference
L = Length, H = Height
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.)
12/16/04 3:12 PM Page 16
1.
2.
C
3.
L5
C
Sub Main
B A
unit unit
LM
A
B
LB
LO2 LO1
LA
LF
Max. 40cm
Max. 40cm
LG
L4
Marks
L1 Max. tubing length
Difference between max. length and min.
∆L (L2 – L4)
length from the No.1 distribution joint
LM Max. length of main tubing (at max. diameter)
, ~ Max. length of each distribution tube
1 2 40
L1+ + +~ Total max. tubing length including length of
2
1 40
+
+ +LF+LG+LH each distribution tube (only narrow tubing)
A B
L5 Distance between PC and AD unit
When outdoor unit is installed higher than indoor unit
H1
When outdoor unit is installed lower than indoor unit
H2 Max. difference between indoor units
H3 Max. difference between outdoor units
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.
L2
LC LD LE
5
4
For
extension
For
extension
LH
2
1
and
Contents
Actual length
Equivalent length
16
L1
40
6
H2
3
R410A distribution joint
K70A060Z (for outdoor unit)
K70A059Z (for outdoor unit)
parts.
K70A058Z (for indoor unit)
K70A057Z (for indoor unit)
K70A056Z (for indoor unit)
Length (m)
>
150
>
175
> 40
>
80
>
30
>
300
>
10
>
50
>
40
>
15
>
4
H1