43
AHU Kit – Installation Instructions –
11/2021
Product description
3
Technical data and limitations – PACi systems –
R32
(cont.)
AHU Kit
PAW-280PAH2(L/M) or PAW-280PAH3M(-1)
Outdoor unit – PACi Elite
U-71PZH2E8 U-100PZH2E8 U-125PZH2E8 U-140PZH2E8 U-200PZH2E8 U-250PZH2E8
Nominal cooling capacity
kW
7.1
10.0
12.5
14.0
19.5
23.2
Nominal heating capacity
kW
8.0
11.2
14.0
16.0
22.4
28.0
Piping connections
Liquid pipe
Inch (mm)
3/8 (9,52)
3/8 (9,52)
3/8 (9,52)
3/8 (9,52)
3/8 (9,52)
1/2 (12,7)
Gas pipe
Inch (mm)
5/8 (15,88)
5/8 (15,88)
5/8 (15,88)
5/8 (15,88)
1 (25,4)
1 (25,4)
Piping length
Min / Max
m
5 / 50
5 / 85
5 / 85
5 / 85
5 / 90
5 / 60
Precharged length (
R32
)
Max
m
30
30
30
30
30
30
Additional refrigerant charge (
R32
) due to extended piping
length
g/m
45
45
45
45
60
80
Ambient temperature
Cooling (Min / Max) °C DB
-15 / 46
-15 / 46
-15 / 46
-15 / 46
-15 / 46
-15 / 46
Heating (Min / Max) °C WB
-20 / 18
-20 / 18
-20 / 18
-20 / 18
-20 / 24
-20 / 24
AHU unit under “standard conditions”
Air volume flow
Cooling (Min / Max) m³/h
780 / 1,320
900 / 2,160 1,140 / 2,280 1,200 / 2,400 2,160 / 4,320 2,280 / 5,040
Air intake temperature
1
Cooling (Min / Max) °C DB
18 / 32
18 / 32
18 / 32
18 / 32
18 / 32
18 / 32
°C WB
14 / 25
14 / 25
14 / 25
14 / 25
n/a
n/a
Heating (Min / Max) °C DB
16 / 30
16 / 30
16 / 30
16 / 30
16 / 30
16 / 30
AHU DX coil heat exchanger volume Min / Max
dm
3
– / 1.8
1.7 / 2.1
1.7 / 2.1
1.7 / 2.1
2.3 / 4.3
2.7 / 4.3
Heat exchanger face area
Min / Max
m
2
– / –
0.43 / 0.51
0.43 / 0.51
0.43 / 0.51
0,54 / 1.0
0.66 / 1.0
AHU unit under “special conditions A
2
”
Air volume flow,
subject to restrictions
2
Cooling (Min / Max) m³/h
780 / 1,700
900 / 2,400 1,140 / 2,600 1,200 / 2,700 2,160 / 4,600 2,280 / 5,400
Air intake temperature
1
Cooling (Min / Max) °C DB
18 / 30
18 / 30
18 / 30
18 / 30
18 / 30
18 / 30
°C WB
14 / 25
14 / 25
14 / 25
14 / 25
n/a
n/a
Heating (Min / Max) °C DB
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
– / 2.2
1.7 / 3.0
1.7 / 3.0
1.7 / 3.0
2.3 / 5.7
2.7 / 7.1
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
Max. additional refrigerant charge (
R32
)
kg
0.33
0,74
0,74
0,74
1.16
2.32
Max. pipe length
m
40
65
65
65
90
60
Max. ambient temp. for pump down
°C
35
43
43
43
n/a
n/a
Air volume flow m³/h
Outdoor unit
360 510 700 780 870 900 990 1080 1140 1200 1320 1450 1500 1600 1700 1800 1900 2000 2160 2280 2300 2400 2500 2600 2700 2900 3000 3500 4000 4320 4440 4600 5040 5400
U-60PZ2E5
U-71PZ2E5
U100-PZ2E5/8
U125-PZ2E5/8
U140-PZ2E8
U-36PZH2E5
U-50PZH2E5
U-60PZH2E5
U-71PZH2E5/8
U-100PZH2E5/8
U-125PZH2E5/8
U-140PZH2E5/8
U-200PZH2E8
U-250PZH2E8
Maximum allowed air volume flow
under “Standard conditions”
Higher maximum allowed air volume flow under “Special conditions A
2
”:
Maximum allowed air intake temperature at AHU DX coil heat exchanger in cooling mode is restriced to 30 °C DB.
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:
● 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.
Note: The AHU DX coil must be designed according to Panasonic specification.
Calculation example for total additional refrigerant charge (
R32
)
Unit: U-60PZ2E5
Pipe length: 40 metres
AHU DX coil (supplied by AHU manufacturer): 1,7 dm
3
Refrigerant charge at shipment fitted for pipe length within 30 m
Pipes additional refrigerant charge: 0.035 kg/m
Summary of Contents for PAW-280PAH3M-1
Page 2: ...Notes ...
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