Panasonic PAW-160MAH3M, Руководство по установке, Страница: 36 / 92

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AHU Kit – Installation Instructions – 07/2023
Product description
3
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
–4
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
–4
= 5.4
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 – R32
AHU Kit model PAW-280PAH3M-1
Outdoor unit – PACi NX Standard U-25PZ3E5 U-36PZ3E5 U-50PZ3E5 U-60PZ3E5A U-71PZ3E5A U-100PZ3E5/8 U-125PZ3E5/8 U-140PZ3E5/8
Nominal cooling capacity kW 2.5 3.6 5.0 6.0 7.1 10.0 12.5 14.0
Nominal heating capacity kW 3.2 3.6 5.0 6.0 7.1 10.0 12.5 14.0
Piping connections Liquid pipe Inch (mm) 1/4 (6.35) 1/4 (6.35) 1/4 (6.35) 1/4 (6.35) 1/4 (6.35) 3/8 (9.52) 3/8 (9.52) 3/8 (9.52)
Gas pipe Inch (mm) 1/2 (12.70) 1/2 (12.70) 1/2 (12.70) 1/2 (12.70) 5/8 (15.88) 5/8 (15.88) 5/8 (15.88) 5/8 (15.88)
Piping length Min / Max m 3 / 15 3 / 15 3 / 20 3 / 40 3 / 40 5 / 50 5 / 50 5 / 50
Precharged length ( R32 ) Max m 7.5 7.5 7.5 30 30 30 30 30
Additional refrigerant charge ( R32 ) due to extended piping
length
kg/m 0.01 0.01 0.015 0.015 0.017 0.045 0.045 0.045
Ambient temperature (outdoor unit) Cooling (Min / Max) °C DB -10 / +43 -10 / +43 -10 / +43 -10 / +43 -10 / +43 -10 / +43 -10 / +43 -10 / +43
Heating (Min / Max) °C WB -15 / +24 -15 / +24 -15 / +24 -15 / +24 -15 / +24 -15 / +24 -15 / +24 -15 / +24
AHU unit under “standard conditions”
Air volume flow Cooling (Min / Max) m³/h 360 / 570 540 / 870 630 / 990 780 / 1,320 780 / 1,320 900 / 2,160 1,140 / 2,280 1,200 / 2,400
Air intake temperature
1
Cooling (Min / Max) °C DB 18 / 32 18 / 32 18 / 32 18 / 32 18 / 32 18 / 32 18 / 32 18 / 32
°C WB 14 / 25 14 / 25 14 / 25 14 / 25 14 / 25 14 / 25 14 / 25 14 / 25
Heating (Min / Max) °C DB 16 / 30 16 / 30 16 / 30 16 / 30 16 / 30 16 / 30 16 / 30 16 / 30
AHU DX coil heat exchanger volume Min / Max dm
3
1.0 / 1.12 1.00 / 1.121 1.00 / 1.121 1.3 / 1.4 1.3 / 1.4 1.7 / 1.9 1.7 / 1.9 1.7 / 1.9
Heat exchanger face area Min / Max m
2
– / – – / – – / – 0.43 / 0.51 0.43 / 0.51 0.43 / 0.51 0.43 / 0.51 0.43 / 0.51
AHU unit under “special conditions A”
2
Air volume flow,
subject to restrictions
2
Cooling (Min / Max) m³/h 360 / 870 540 / 870 630 / 1,000 780 / 1,450 780 / 1,600 900 / 2,300 1,140 / 2,520 1,200 / 2,640
Air intake temperature
1
Cooling (Min / Max) °C DB 18 / 32 18 / 32 18 / 30 18 / 30 18 / 30 18 / 30 18 / 30 18 / 30
°C WB 14 / 25 14 / 25 14 / 25 14 / 25 14 / 25 14 / 25 14 / 25 14 / 25
Heating (Min / Max) °C DB 16 / 30 16 / 30 16 / 30 16 / 30 16 / 30 16 / 30 16 / 30 16 / 30
AHU unit under “special conditions B”
3
AHU DX coil heat exchanger volume,
subject to restrictions
3
Min / Max dm
3
1.0 / 1.2 1.0 / 1.2 1.0 / 1.2 1.3 / 1.6 1.3 / 1.6 1.7 / 2.6 1.7 / 2.6 1.7 / 2.8
Additional refrigerant charge ( R32 ) due to larger heat
exchanger volume
kg/dm
3
0.83 0.83 0.83 0.83 0.83 0.83 0.83 0.83
Max. additional refrigerant charge ( R32 ) kg 0.07 0.07 0.07 0.17 0.17 0.58 0.58 0.74
Max. pipe length m 7.5 7.5 15 25 30 35 35 35
Max. ambient temp. for pump down °C DB n/a n/a 30 30 30 30 30 30
Continued on the following page. See footnotes overleaf.
NX