Technical Information

Piping work and
refrigerant charge
TCGB0079 rev.0 - 01/2013
116
IVX Standard series
Liquid Ø6.35 Ø9.52 Ø12.70 Ø15.88
Gas
Ø9.52 Ø12.70 Ø15.88 Ø19.05 Ø12.70 Ø15.88 Ø19.05 Ø22.20 Ø25.40 Ø15.88 Ø19.05 Ø22.20 Ø25.40 Ø28.60 Ø22.20 Ø25.40 Ø28.60
Performance
capacity (m)
3 HP -
30
(1)(2)
30
(2)
- 30
(1)
50 - - - - - - - - - - -
4 HP - - 5
(2)
5
(2)
40
(1)
70 50
(4)
- - 30
(3)
30
(3) (4)
- - - - - -
5 - 6 HP - - 5
(2)
5
(2)
40
(1)
75 50
(4)
- - 30
(3)
30
(3) (4)
- - - - - -
8 HP - - - - - -
50
(1)(4)
50
(1)
70
(5)
-
50
(1)(3)(4)
50
(1)(3)
100
50
(1)(3)
50
(3)
10 - 12 HP - - - - - - - - - - - 50
(1)
100 50
50
(1)(3)
50
(3)
50
(3)
(1).Reducing gas pipe size will lower cooling capacity due to larger pressure loss in gas piping and narrow operation range.
(2).Reducing liquid pipe size will narrow operation range due to indoor unit relation with expansion valve capacity.
(3).Increasing liquid pipe size will require additional refrigerant charge.
(4).When using Ø 19.05 gas pipe (soft-annealed), please switch ON DSW2-4# in the Outdoor Unit PCB.
(5) In case that pipe length exceeds 70m in 8 HP, please use a
Ø12.7 pipe as a liquid pipe.
In case of exceeding the recommended number of connected Indoor Units of 8 HP (more than 5 Units), please use a
Ø12.7 pipe as a liquid
Standard
9.2.5 Refrigerant piping size and multikit/distributor
Select the piping connection sizes according to the following procedures
• Between outdoor unit and branch pipe: Select the same pipe connection size as the pipe size of the outdoor unit.
• Between branch pipe and indoor unit: Select the same pipe connection size as the pipe size of the indoor unit.
1 indoor unit system
(mm)
Outdoor Unit HP
Pipe Size (L)
Gas Liquid
2 / 2.5 Ø12.70 Ø6.35
3 - 6 Ø15.88 Ø9.52
8 Ø25.40 Ø9.52
10/12 Ø25.40 Ø12.70
2 indoor units system
(mm) Multi-kit
Outdoor
Unit HP
Pipe Size (A)
IVX Premi-
um Series
IVX Standard
Series
Gas Liquid
2 / 2.5 Ø12.70 Ø6.35
TW-22AN TE-03N1
3 / 4 Ø15.88 Ø9.52
TW-52AN
3HP: TE-03N1
4HP: TE-04N1
5 / 6 Ø15.88 Ø9.52
TW-52AN TE-56N1
8 Ø25.40 Ø9.52
(1)
TW-102AN TE-08N
10 /12 Ø25.40 Ø12.70
TW-102AN TE-10N
(1) In case that pipe length exceeds 70m in 8 HP, please use a Ø12.7 pipe as a liquid pipe.
(mm)
Indoor Unit capacity
Pipe Size (B, C)
Gas Liquid
≤ 1.5 HP
Ø12.70 Ø6.35
1.8/2.0HP
Ø15.88 Ø6.35
≥ 2.3 HP
Ø15.88 Ø9.52
Connections including Indoor Units 8 and 10 HP are not possible
TCGB0079_rev0_11-2012.indb 116 29/01/2013 14:27:29