37
AHU Kit – Installation Instructions – 07/2023
Product description
3
AHU Kit model
PAW-280PAH3M-1
Outdoor unit – PACi NX Elite
U-36PZH3E5 U-50PZH3E5 U-60PZH3E5 U-71PZH4E5/8 U-100PZH4E5/8 U-125PZH4E5/8 U-140PZH4E5/8
Nominal cooling capacity
kW
3,6
5
6
7.1
10
12.5
14
Nominal heating capacity
kW
3,6
5
6
7.5
10.8
13.5
15.5
Piping connections
Liquid pipe
Inch (mm)
1/4 (6,35)
1/4 (6,35)
1/4 (6,35)
3/8 (9,52)
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)
5/8 (15,88)
5/8 (15,88)
5/8 (15,88)
5/8 (15,88)
Piping length
Min / Max
m
3 / 40
3 / 40
3 / 40
5 / 60
5 / 100
5 / 100
5 / 100
Precharged length (
R32
)
Max
m
30
30
30
30
30
30
30
Additional refrigerant charge (
R32
) due to extended piping
length
kg/m
0.015
0.015
0.015
0.03
0.04 (< 85 m);
0.025 (85 ... 100 m)
0.04 (< 85 m);
0.025 (85 ... 100 m)
0.04 (< 85 m);
0.025 (85 ... 100 m)
Ambient temperature (outdoor unit)
Cooling (Min / Max) °C DB
-15 / +46
-15 / +46
-15 / +46
-15 / +52
-15 / +52
-15 / +52
-15 / +52
Heating (Min / Max) °C WB
-20 / +24
-20 / +24
-20 / +24
-20 / +24
-20 / +24
-20 / +24
-20 / +24
AHU unit under “standard conditions”
Air volume flow
Cooling (Min / Max) m³/h
360 / 870
510 / 990
780 / 1,320
720 / 1,740
780 / 2,610
960 / 3,480
1,170 / 2,970
Air intake temperature
1
Cooling (Min / Max) °C DB
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
Heating (Min / Max) °C DB
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 / 1.3
1.0 / 1.3
1.1 / 1.4
0.26 / 0.41
1.7 / 2.1
1.7 / 2.1
1.7 / 2.1
Heat exchanger face area
Min / Max
m
2
– / –
– / –
– / –
– / –
0.4 / 0.6
0.4 / 0.8
0.4 / 0.8
AHU unit under “special conditions A”
2
Air volume flow,
subject to restrictions
2
Cooling (Min / Max) m³/h
360 / 900
630 / 1,080
780 / 1,600
720 / 1,900
780 / 2,800
960 / 3,600
1,170 / 3,600
Air intake temperature
1
Cooling (Min / Max) °C DB
18 / 32
18 / 32
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
Heating (Min / Max) °C DB
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 / 1.5
1.0 / 1.5
1.1 / 1.8
1.2 / 2.5
1.7 / 3.4
1.7 / 3.4
1.7 / 3.4
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
Max. additional refrigerant charge (
R32
)
kg
0.17
0.17
0.33
0.58
1.08
1.08
1.08
Max. pipe length
m
25
25
18
40
75
75
75
Max. ambient temp. for pump down
°C DB
n/a
n/a
30
30
30
30
30
Air volume flow m³/h
Outdoor unit
360
510
540
570
630
720
780
870
900
960
990
1,080
1,170
1,200
1,320
1,450
1,500
1,600
1,740
1,800
1,900
2,000
2,160
2,280
2,300
2,400
2,520
2,610
2,640
2,800
2,970
3,000
3,480
3,600
PACi NX Standard
U-25PZ3E5
U-36PZ3E5
U-50PZ3E5
U-60PZ3E5
U-71PZ3E5
U100-PZ3E5/8
U125-PZ3E5/8
U140-PZ3E8
PACi NX Elite
U-36PZH3E5
U-50PZH3E5
U-60PZH3E5
U-71PZH4E5/8
U-100PZH4E5/8
U-125PZH4E5/8
U-140PZH4E5/8
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-71PZH4E8
Pipe length: 40 metres
AHU DX coil volume (supplied by AHU manufacturer): 2.1 dm³
Summary of Contents for PAW-160MAH3M
Page 2: ...Notes...
Page 90: ...90 AHU Kit Installation Instructions 07 2023 Parameter settings 9 Notes...
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