Panasonic U-8MF1E8 Mode D'emploi page 7

3WAY̲ECO-i̲inst̲eng̲Book.indb 7
1-5. 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.
1.
2.
3. The outdoor connection main tubing (LO portion) is determined by the total capacity of the
outdoor units that are connected to the tube ends.
4.
Balance tubing
(ø9.52)
Max. 40 cm
Explanation of symbols
Max. 40 cm
Distribution joint
(CZ: purchased separately)
Ball valve (field supply)
T-joint (field supply)
Solidly welded shut
(pinch weld)
Note: Do not use commercially available T-joints for the liquid tubing
* Be sure to use special R410A distribution joints (CZ: purchased separately) for outdoor
unit connections and tubing branches.
Table 1-2 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights
Items Marks
L1 Max. tubing length
Difference between max. length and min. length from the No. 1
ΔL (L2 – L4)
distribution joint
LM Max. length of main tubing (at max. diameter)
Allowable tubing length
Max. length of each distribution tube
1, 2... 40
Total max. tubing length including length of each distribution tube (only
L1+ 1+ 2... 39+
liquid tubing)
A+ B+LF+LG+LH
L5 Distance between outdoor units
When outdoor unit is installed higher than indoor unit
H1
When outdoor unit is installed lower than indoor unit
Allowable elevation difference
H2 Max. difference between indoor units
H3 Max. difference between outdoor units
T-joint tubing (field-supply); Max. tubing length between the first T-joint
Allowable length of joint tubing L3
and solidly welded-shut end point
N OTE
1. The outdoor connection main tubing (LO portion) is determined by the total capacity of the outdoor units that are connected to the
tube ends.
2. If the longest tubing length (L1) exceeds 90 m (equivalent length), increase the sizes of the main tubes (LM) by 1 rank for the
discharge tubes, suction tubes, and liquid tubes. (Use a field supply reducer.)
3. If the longest main tube length (LM) exceeds 50 m, increase the main tube size at the portion before 50 m by 1 rank for the suction
tubes and discharge tubes. (Use a field supply reducer.)
(For the portion that exceeds 50 m, set based on the main tube sizes (LA) listed in the table on the following page.)
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.
T-joint tubing
(header joint system)
For
extension
For
extension
Solenoid valve kit
R410A distribution joint
CZ-P680PH2 (for outdoor unit)
CZ-P1350PH2 (for outdoor unit)
and parts.
CZ-P224BH2 (for indoor unit)
CZ-P680BH2 (for indoor unit)
CZ-P1350BH2 (for indoor unit)
Contents
Actual length
Equivalent length
L = Length, H = Height
9
SUPPLEMENT
2011/02/16 14:55:40 3WAY̲ECO-i̲inst̲eng̲Book.indb 8
1-6. Tubing Size
Table 1-3 Main Tubing Size (LA)
kW
Total system horsepower (hp)
Combined outdoor units (hp)
Suction tubing (mm) ø19.05 ø22.22
Discharge tubing (mm) ø15.88
Liquid tubing (mm)
kW
Total system horsepower (hp)
Combined outdoor units (hp)
Suction tubing (mm)
Discharge tubing (mm) ø28.58
Liquid tubing (mm)
*1: If future extension is planned, select the tubing diameter based on the total horsepower after extension.
However extension is not possible if the resulting tubing size is two ranks higher.
*2: The balance tube (outdoor unit tube) diameter is ø9.52.
*3: Type 1 tubing should be used for the refrigerant tubes.
*4: If the length of the longest tube (L1) exceeds 90 m (equivalent length), increase the main tube (LM) size by 1 rank for the suction,
discharge, and liquid tubes. (Use field-supply reducers.) (Select from Table 1-3 and Table 1-8.)
*5: If the longest main tube length (LM) exceeds 50 m, increase the main tube size at the portion before 50 m by 1 rank for the suction
tubes and discharge tubes.
(For the portion that exceeds 50 m, set based on the main tube sizes (LA) listed in the table above.)
■ Size of tubing (LO) between outdoor units
Select the size of tubing between outdoor units based on the main tubing size (LA) as given in the table above.
Table 1-4 Main Tubing Size After Distribution (LB, LC...)
Length (m)
Total capacity after distribution
≤ 150
≤ 175
≤ 40
Tubing size
≤ 80
*3
≤ 30
Total capacity after distribution
≤ 300
≤ 10
Tubing size
≤ 50
≤ 40
≤ 15
Table 1-5 Outdoor Unit Tubing Connection Size ( A – C)
≤ 4
kW 22.4
ø19.05
≤ 2 Suction tubing
ø15.88
Discharge tubing
Liquid tubing
Balance tubing
22.4 28.0 33.5 40.0 45.0 50.4 56.0 61.5
8 10 12 14 16 18 20 22
10 10 12
8 10 12 14 16
8 10 10
ø25.40 ø28.58 ø28.58
ø19.05 ø22.22 ø25.40
ø9.52 ø12.70 ø15.88
101.0 106.5 113.0 118.0 123.5 130.0 135.0
36 38 40 42 44 46 48
16 16 16 16 16 16 16
10 12 14 16 16 16 16
10 10 10 10 12 14 16
ø38.10
ø31.75
ø19.05
7.1 16.0 25.0 30.0
Below kW
(2.5 hp) (6 hp) (9 hp) (11 hp)
7.1 16.0 25.0
Over kW –
(2.5 hp) (6 hp) (9 hp)
Suction tubing (mm) ø15.88 ø19.05 ø19.05 ø22.22 ø25.40 ø25.40 ø28.58 ø28.58 ø28.58
Discharge tubing (mm) ø12.70 ø15.88 ø15.88 ø19.05 ø19.05 ø22.22 ø22.22 ø22.22 ø25.40
Liquid tubing (mm) ø9.52 ø9.52 ø9.52 ø9.52
75.6 98.0 103.6
Below kW –
(27 hp) (35 hp) (37 hp)
70.0 75.6 98.0 103.6
Over kW
(25 hp) (27 hp) (6 hp) (37 hp)
Suction tubing (mm) ø31.75 ø31.75 ø38.10 ø38.10
Discharge tubing (mm) ø25.40 ø28.58 ø28.58 ø31.75
Liquid tubing (mm) ø19.05 ø19.05 ø19.05 ø19.05
28.0 33.5 40.0 45.0
ø22.22 ø25.4 ø28.58
Brazing connection
ø19.05 ø22.22
Brazing connection
ø9.52 ø12.7
Brazing connection
ø9.52
Flare connection
Unit: mm
10
2011/02/16 14:55:40
hp=horsepower
68.0 73.0 78.5 85.0 90.0 96.0
24 26 28 30 32 34
14
14 16 16 16 16
10
10 10 12 14 16
10
ø31.75
ø28.58
ø19.05
hp = horsepower
36.4 42.0 47.6 58.8 70.0
(13 hp) (15 hp) (17 hp) (21 hp) (25 hp)
30.0 36.4 42.0 47.6 58.8
(11 hp) (13 hp) (15 hp) (17 hp) (21 hp)
ø12.70 ø12.70 ø12.70 ø15.88 ø15.88
*1: The outdoor unit connection tubing
(LO) is determined by the total capacity
of the outdoor units connected to the
tube ends. The tubing size is selected
based on the table of main tube sizes
after the branch.
*2: If the total capacity of the indoor units
connected to the tube ends is different
from the total capacity of the outdoor
units, then the main tube size is
selected based on the total capacity of
the outdoor units.
(For LA, LB, and LF in particular)