Panasonic PAW-160MAH3M Installation Instructions Manual page 36

Product description
Calculation example for number of passes in the heat exchanger
The minimum number of passes in the AHU heat exchanger is restricted. The limit is calculated by
the formula:
Minimum number of passes
= Number of steps × Distance between tube sheets × Number of rows × 1.5 × 10
The calculated value must then be rounded up to the next integer number.
Example
Number of steps: 12
Distance between tube sheets: 1,000 mm
Number of row: 3
Minimum number of passes = 12 × 1,000 x 3 × 1.5 × 10
This value must be rounded up to 6.
This means that the minimum number of passes is 6 passes.
Technical data and limitations – PACi NX systems –
NX
3
AHU Kit model
Outdoor unit – PACi NX Standard
Nominal cooling capacity
Nominal heating capacity
Piping connections
Piping length
Precharged length (R32)
Additional refrigerant charge (R32) due to extended piping
length
Ambient temperature (outdoor unit)
AHU unit under "standard conditions"
Air volume flow
Air intake temperature
1
AHU DX coil heat exchanger volume Min / Max
Heat exchanger face area
AHU unit under "special conditions A"
Air volume flow,
subject to restrictions
2
Air intake temperature
1
AHU unit under "special conditions B"
AHU DX coil heat exchanger volume,
subject to restrictions
3
Additional refrigerant charge (R32) due to larger heat
exchanger volume
Max. additional refrigerant charge (R32)
Max. pipe length
Max. ambient temp. for pump down
Continued on the following page. See footnotes overleaf.
36
U-25PZ3E5
kW 2.5
kW 3.2
Liquid pipe Inch (mm) 1/4 (6.35)
Gas pipe Inch (mm) 1/2 (12.70)
Min / Max m 3 / 15
Max m 7.5
kg/m 0.01
Cooling (Min / Max) °C DB -10 / +43
Heating (Min / Max) °C WB -15 / +24
Cooling (Min / Max) m³/h 360 / 570
Cooling (Min / Max) °C DB 18 / 32
°C WB 14 / 25
Heating (Min / Max) °C DB 16 / 30
dm 1.0 / 1.12
3
Min / Max m – / –
2
2
Cooling (Min / Max) m³/h 360 / 870
Cooling (Min / Max) °C DB 18 / 32
°C WB 14 / 25
Heating (Min / Max) °C DB 16 / 30
3
Min / Max dm 1.0 / 1.2
3
kg/dm 0.83
3
kg 0.07
m 7.5
°C DB n/a
= 5.4
–4
PAW-280PAH3M-1
U-36PZ3E5 U-50PZ3E5 U-60PZ3E5A U-71PZ3E5A U-100PZ3E5/8 U-125PZ3E5/8 U-140PZ3E5/8
3.6 5.0 6.0
3.6 5.0 6.0
1/4 (6.35) 1/4 (6.35) 1/4 (6.35)
1/2 (12.70) 1/2 (12.70) 1/2 (12.70)
3 / 15 3 / 20 3 / 40
7.5 7.5 30
0.01 0.015 0.015
-10 / +43 -10 / +43 -10 / +43
-15 / +24 -15 / +24 -15 / +24
540 / 870 630 / 990 780 / 1,320
18 / 32 18 / 32 18 / 32
14 / 25 14 / 25 14 / 25
16 / 30 16 / 30 16 / 30
1.00 / 1.121 1.00 / 1.121 1.3 / 1.4
– / – – / – 0.43 / 0.51
540 / 870 630 / 1,000 780 / 1,450
18 / 32 18 / 30 18 / 30
14 / 25 14 / 25 14 / 25
16 / 30 16 / 30 16 / 30
1.0 / 1.2 1.0 / 1.2 1.3 / 1.6
0.83 0.83 0.83
0.07 0.07 0.17
7.5 15 25
n/a 30 30
AHU Kit – Installation Instructions – 07/2023
–4
R32
7.1 10.0 12.5
7.1 10.0 12.5
1/4 (6.35) 3/8 (9.52) 3/8 (9.52)
5/8 (15.88) 5/8 (15.88) 5/8 (15.88)
3 / 40 5 / 50 5 / 50
30 30 30
0.017 0.045 0.045
-10 / +43 -10 / +43 -10 / +43
-15 / +24 -15 / +24 -15 / +24
780 / 1,320 900 / 2,160 1,140 / 2,280 1,200 / 2,400
18 / 32 18 / 32 18 / 32
14 / 25 14 / 25 14 / 25
16 / 30 16 / 30 16 / 30
1.3 / 1.4 1.7 / 1.9 1.7 / 1.9
0.43 / 0.51 0.43 / 0.51 0.43 / 0.51
780 / 1,600 900 / 2,300 1,140 / 2,520 1,200 / 2,640
18 / 30 18 / 30 18 / 30
14 / 25 14 / 25 14 / 25
16 / 30 16 / 30 16 / 30
1.3 / 1.6 1.7 / 2.6 1.7 / 2.6
0.83 0.83 0.83
0.17 0.58 0.58
30 35 35
30 30 30
14.0
14.0
3/8 (9.52)
5/8 (15.88)
5 / 50
30
0.045
-10 / +43
-15 / +24
18 / 32
14 / 25
16 / 30
1.7 / 1.9
0.43 / 0.51
18 / 30
14 / 25
16 / 30
1.7 / 2.8
0.83
0.74
35
30