Panasonic U-8ME1E8 Mode D'emploi page 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. Main tubing length LM = LA + LB ...
2. Main distribution tubes LC – LH are selected according to the capacity after the distribution joint.
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. Sizes of indoor unit connection tubing 1 – 64 are determined by the connection tubing sizes on the indoor units.
H3
C
LM
B A
Balance tubing
LO
LB LC LD
(ø6.35)
LA
Explanation of symbols
4
For
LF
extension
Distribution joint
Max. 40cm
(APR: purchased
For
separately)
extension
LH
Ball valve (field supply) Max. 40cm
T-joint (field supply)
LG
1
Solidly welded shut
L4
(pinch weld)
Note: Do not use commercially available T-joints for the liquid tubing
* Be sure to use special R410A distribution joints (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
Item Mark
L1 Max. tubing length
Difference between max. length and min.
L (L2 – L4)
length from the No.1 distribution joint
Allowable tubing LM Max. length of main tubing (at max. diameter)
length
1, 2... 64 Max. length of each distribution tube
L1+ 1+ 2... 63+ Total max. tubing length including length of
A+ B+LF+LG+LH each distribution tube (only liquid tubing)
Maximum tubing length from outdoor's 1st distribution
A, B+LO, C+LO
joint to each outdoor unit
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
Allowable length of T-joint tubing (field-supply); Max. tubing length between
L3
joint tubing the first T-joint and solidly welded-shut end point
L = Length, H = Height
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 gas tubes
and liquid tubes. (Use a field supply reducer.) (Select the tube size from the table of main tube sizes (Table 1-3) on the following
page (LA table), and from the table of refrigerant tubing sizes (Table 1-8) on the second following page.)
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 gas
tubes. (Use a field supply reducer.) Determine the length less than the limitation of allowable maximum tubing length.
(For the portion that exceeds 50 m, set based on the main tube sizes (LA) listed in the table on the following page.)
4: If the size of the existing tubing is already larger than the standard tubing size, it is not necessary to further increase the size.
* If the existing tubing is used, and the amount of on-site refrigerant charge exceeds the value listed below, then change the size of
the tubing to reduce the amount of refrigerant.
Total amount of refrigerant for the system with 1 outdoor unit: 50 kg
Total amount of refrigerant for the system with 2 outdoor units: 80 kg
Total amount of refrigerant for the system with 3 outdoor units: 100 kg
5: When the tubing length exceeds 40m, increase a longer liquid or gas tubing by 1 rank.
Refer to the Technical Data for the details.
6: If the tubing length exceeds 500m, the formula is 15 x (2 - all tubing length/500). Determine the length less than the limitation of
allowable maximum tubing length.
SUPPLEMENT
L1
L2
R410A distribution joint
L3
CZ-P680PJ2 (for outdoor unit)
CZ-P1350PJ2 (for outdoor unit)
H1 CZ-P160BK2 (for indoor unit)
64
CZ-P680BK2 (for indoor unit)
5 62 63
CZ-P1350BK2 (for indoor unit)
H2
3
2
and parts.
Contents Length (m)
Actual length 180
Equivalent length 200
5
50 *
3
*
30
1000
10
50
40
6
15 *
4
2
9
1-6. Tubing Size
Table 1-3 Main Tubing Size (LA)
kW 22.4 28.0 33.5 40.0 45.0
Total system
8 10 12 14 16
horsepower
Combined
8 10 12 14 16
outdoor units
Gas tubing (mm) ø19.05 ø22.22 ø25.4
Liquid tubing (mm) ø9.52 ø12.7
kW 101.0 107.0 113.0 118.0 124.0
Total system
36 38 40 42 44
horsepower
16 16
Combined 20 20 20
14 16
outdoor units 16 18 20
12 12
Gas tubing (mm)
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 ø6.35.
*3: The refrigerant tubing should be used with R410A refrigerant.
*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
gas 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
gas 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...)
7.1 16.0
Below kW
(2.5 hp) (6 hp) (8.1 hp)
Total capacity
after distribution
7.1
Over kW –
(2.5 hp) (6 hp)
Gas tubing (mm) ø12.7 ø15.88 ø19.05
Tubing size
Liquid tubing (mm) ø9.52 ø9.52 ø9.52
Note: In case the total capacity of connected indoor units exceeds the total capacity of the outdoor units, select the main tubing size for
the total capacity of the outdoor units. (Especially the main tubing segments of LA, LB and LF.)
Table 1-5 Outdoor Unit Tubing Connection Size( A – C)
kW 22.4 28.0 33.5 40.0
ø19.05 ø22.22 ø25.4
Gas tubing
Brazing connection
ø9.52 ø12.7
Liquid tubing
Flare connection
ø6.35
Balance tubing
Flare connection
Table 1-6 Indoor Unit Tubing Connection Size
Indoor unit type 22 28 36 45
Gas tubing (mm) ø12.7
Liquid tubing (mm) ø6.35
Note: Use C1220T-1/2H or -H material for tubing over ø22.22.
50.0 56.0 61.5 68.0 73.0 78.5 85.0 90.0
18 20 22 24 26 28 30 32
14 14 14 16 16 16
18 20
8 10 12 12 14 16
ø28.58 ø31.75
ø15.88 ø19.05
130.0 135.0 140.0 145.0 151.0 156.0 162.0 168.0
46 48 50 52 54 56 58 60
16 16 18 20 20 20 20 20
16 16 16 16 18 18 20 20
14 16 16 16 16 18 18 20
ø38.10
ø19.05
hp = horsepower
22.5 30.0 42.0 52.4 70.0 98.0
(11 hp) (15 hp) (19 hp) (25 hp) (35 hp)
16.0 22.5 30.0 42.0 52.4 70.0
(8.1 hp) (11 hp) (15 hp) (19 hp) (25 hp)
ø22.22 ø25.4 ø28.58 ø28.58 ø31.75
ø9.52 ø12.7 ø12.7 ø15.88 ø19.05
Unit: mm
45.0 50.0 56.0
ø28.58
ø15.88
Gas tube
Balance tube Liquid tube
56 73 90 106 140 160 224
ø15.88 ø19.05
ø9.52
10
Unit: mm
96.0
34
18
16
Unit: mm
–
98.0
(35 hp)
ø38.1
ø19.05
280
ø22.22