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Technical data and limitations – PACi systems –
AHU Kit model
Outdoor unit – PACi Elite
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
AHU DX coil heat exchanger volume Min / Max
Heat exchanger face area
AHU unit under "special conditions A"
Air volume flow,
subject to restrictions
Air intake temperature
AHU unit under "special conditions B"
AHU DX coil heat exchanger volume,
subject to restrictions
Additional refrigerant charge (R32) due to larger heat
exchanger volume
Max. additional refrigerant charge (R32)
Max. pipe length
Max. ambient temp. for pump down
Outdoor unit
U-200PZH2E8
U-250PZH2E8
1 Air intake temperature entering the AHU DX coil heat exchanger
2 Special conditions A: Using an AHU unit with a higher maximum allowed air volume flow is subject to a restriction of the
"Air intake temperature" to 30 °C DB (instead of 32 °C WB under standard conditions).
3 Special conditions B: Using an AHU DX coil heat exchanger with a larger volume is subject to the following restrictions:
●
●
●
Note: The AHU DX coil must be designed according to Panasonic specification.
Calculation example for total additional refrigerant charge (R32)
Unit: U-200PZH2E8
Pipe length: 40 metres
AHU DX coil volume (supplied by AHU manufacturer): 4.5 dm³
Refrigerant charge at shipment fitted for pipe length within 30 m
Pipes additional refrigerant charge: 0.060 kg/m
AHU DX coil additional refrigerant charge: 0.83 kg/dm³
Refrigerant charge at shipment is sufficient for AHU DX coil volume up to 4.3 dm³
Total additional refrigerant charge calculation
((4.5 dm3 – 4.3 dm³) x 0.83 kg/dm³) + (10 m x 0.060 kg/m) = 0.166 kg + 0.60 kg = 0.766 kg
AHU Kit – Installation Instructions – 07/2023
Liquid pipe
Gas pipe
Min / Max
Max
Cooling (Min / Max) °C DB
Heating (Min / Max) °C WB
Cooling (Min / Max) m³/h
Cooling (Min / Max) °C DB
1
Heating (Min / Max) °C DB
Min / Max
2
Cooling (Min / Max) m³/h
2
Cooling (Min / Max) °C DB
1
Heating (Min / Max) °C DB
3
Min / Max
3
2,160
2,280
2,300
2,400
2,500
Maximum allowed air volume flow
Higher maximum allowed air volume flow under "Special conditions A"
under "Standard conditions"
Maximum allowed air intake temperature at AHU DX coil heat exchanger in cooling mode is restriced to 30 °C DB.
an additional refrigerant charge (R32), which is required irrespective of an additional refrigerant charge
which might be needed due to an extended piping length (see calculation example below)
AND a reduced maximum pipe length
AND an ambient air temperature limit above which it may not be possible to pump down the complete
refrigerant charge (including all additional refrigerant) into the outdoor unit.
U-200PZH2E8
kW
19.5
kW
22.4
Inch (mm)
3/8 (9,52)
Inch (mm)
1 (25,4)
m
5 / 90
m
30
kg/m
0.060
-15 / 46
-20 / 24
2,160 / 4,320
18 / 32
°C WB
n/a
16 / 30
dm
2.3 / 4.3
3
m
0,54 / 1.0
2
2,160 / 4,600
18 / 30
°C WB
n/a
16 / 30
dm
2.3 / 5.7
3
kg/dm
0.83
3
kg
1.16
m
90
°C
n/a
Air volume flow m³/h
2,600
2,700
2,900
3,000
Product description
R32
PAW-280PAH3M-1
U-250PZH2E8
23.2
28.0
1/2 (12,7)
1 (25,4)
5 / 60
30
0.080
-15 / 46
-20 / 24
2,280 / 5,040
18 / 32
n/a
16 / 30
2.7 / 4.3
0.66 / 1.0
2,280 / 5,400
18 / 30
n/a
16 / 30
2.7 / 7.1
0.83
2.32
60
n/a
3,500
4,000
4,320
4,440
4,600
:
2
3
5,040
5,400
35
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