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Product description
Technical data and limitations – PACi systems (cont.)
AHU Kit
PAW-280PAH2(L)
Outdoor unit
PACi Elite
3-phase
U-200PE1E8
U-250PE1E8
Nominal cooling capacity
kW
20.0
25.0
Nominal heating capacity
kW
22.4
28.0
Air volume (Cooling)
Min (factory)
m³/h
1,680
2,280
Max (factory)
m³/h
3,960
4,440
Air volume (Cooling),
subject to restrictions¹
Max
m³/h
4,300
5,400
AHU DX coil heat
exchanger volume
Min (factory)
dm
3
2.3
2.7
Max (factory)
dm
3
4.3
4.3
AHU DX coil heat
exchanger volume,
subject to restrictions
2
Max
dm
3
5.7
7.1
Additional ref. charge kg/dm
3
0.9
0.9
Max. additional
refrigerant charge
kg
1.25
2.51
Max. pipe length
m
n/a
n/a
Max. ambient temp.
for pump down
°C
n/a
n/a
Heat exchanger front
area
Min
m
2
0.54
0.66
Max
m
2
1.0
1.0
Power source
V / ph / Hz 230 / 1 / 50
230 / 1 / 50
Dimensions (enclosure) H x W x D
mm
278 x 278 x 180 278 x 278 x 180
Net weight
Advanced / Light
kg
4.25 / 4.53
4.25 / 4.53
Protection class
IP65
IP65
Piping length
Min / Max
m
5 / 70
5 / 70
Precharged length
Max
m
30
30
Additional refrigerant charge
g/m
40
80
Piping connections
Liquid pipe
Inch (mm) 3/8” (9,52)
1/2” (12,7)
Gas pipe
Inch (mm) 1” (25,4)
1” (25,4)
Intake temperature of
AHU Kit
1
Cooling (Min / Max)
°C
18 / 32 °C DB
18 / 32 °C DB
(13 / 23 °C WB) (13 / 23 °C WB)
Heating (Min / Max) °C
16 / 30 °C DB
16 / 30 °C DB
Ambient temperature
(outdoor unit)
Cooling (Min / Max)
°C
-15 / 43 °C DB -15 / 43 °C DB
Heating (Min / Max) °C
-20 / 15 °C WB -20 / 15 °C WB
1 This (higher) maximum allowed air volume is subject to a restriction of the “Intake temperature of AHU Kit” to
30 °C DB (instead of 32 °C DB). Without this restriction, only the (lower) factory-set maximum air volume is allowed.
2 This (higher) maximum AHU DX coil heat exchanger volume is subject to the following restrictions:
● an additional refrigerant charge on top of the additional refrigerant charge, which needed, when
pipe length exceeds the maximum allowed with standard shipment charge (see calculation example
below)
● AND a reduced maximum pipe length
● AND an ambient air temperature limit above which no pump down must be performed
Calculation example for total additional refrigerant charge
Unit: U-60PE1E5
Pipe length: 40 meter
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: 0,05 kg/m
AHU DX coil additional refrigerant charge: 0,9 kg/dm
3
Refrigerant charge at shipment fitted for AHU DX coil volume within 1,4 dm
3
Total additional refrigerant charge calculation
((1.7 dm
3
– 1.4 dm
3
) x 0.9 kg/dm
3
) + (10 m x 0.05 kg/m) = 0.27 kg + 0.50 kg = 0.77 kg
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
