How To Process Tubing (Only For Package Outdoor Units); Tubing Length; Tubing Size - Technibel Climatisation KPAVM93R5TA Series Installation Manual

6. HOW TO PROCESS TUBING (Only for PACKAGE Outdoor Units)

6-1.

Tubing Length

Multi type (Twin, Triple, Quartet)
Installation Example 1
LB
1
Select and decide the installation location so that the length of the
refrigerant tubing will be within the limits given in Table.
Items
Allowable tubing length
Allowable elevation
difference
Allowable lenght of
header tube
* If total tubing length including length of each distribution branch becomes 30 to 70 m, additional refrigerant charge is required.
See table below.
CAUTION
In case of multi type installation, indoor units should be installed in the same room. If indoor units are installed in different rooms,
temperature control may develop problems because the system operation follows the thermostat condition of one indoor unit
(main unit).
6-2.

Tubing size

Main Tubing Size (L1, LA, LB, LC)
Main tube (LA) OD
GRV25x
Wide tube 15.88 (5/8)
Narrow tube 9.52 (3/8)
Required additional 50
refrigerant (g/m)
Distribution Branch Size ( l l 1 1 , l l 2 2 )
Indoor unit type 9 type
Wide tube
Narrow tube
Required additional
refrigerant (g/m)
NOTE
* In case of 25 type, use the "Tube connector" (accessory supplied with the indoor unit) for sizing up narrow tube from 6.35 to 9.52.
L1
L2
LC
4
2 3
0482_M_I
Marks
L1 Maximum tubing length
L2 Maximum length from the No. 1 distribution joint
l l l l
Maximum length of each distribution branch
1, 2, 3, 4
l l l
Total tubing lenght including lenght of each distribution
1, 2, 3
+ L1 branch
Max. allowable tubing length including lenght of each
distribution branch at shipment
H1 When outdoor unit installed higher
When outdoor unit installed lower
H2 Maximum difference between indoor units
L3 Maximum tubing lenght between the first T-joint and
terminated (weld shut) end point
Multi type (twin, Triple, Quartet)
Main tube (LB, LC) OD
GRV36,48x
19.05 (3/4) 19.05 (3/4) (or 15.88 (5/8))*
9.52 (3/8)
50
12 type 18 type
12.7 (1/2)
Installation Example 2
LA
T-joint
1
Symbol meanings:
: Optional distribution joint kit (DDV1912)
: T-joint (field supply)
: Weld solidly (pinch shut)
Contents
Actual length
Equivalent length
9.52 (3/8)
50
25 type 36 type
15.88 (5/8)
9.52 (3/8) *
50
12
L2
L3
2 3
0483_M_I
Length (m)
≤ 50
≤ 70
≤ 20
≤ 20
≤ 70
≤ 30*
≤ 50
≤ 30
≤ 4
≤ 1
48 type
19.05 (3/4)
EG