Airwell PAC BTE UI 4 Manuel D'utilisation page 21

4 - REFRIGERATING CONNECTIONS
4.3 - INTERNAL UNIT VACUUM OPERATION
is delivered with charged refrigerator circuits in the following
manner:
Internal unit
External unit charged with refrigerant (voltage 220-240/1/50)
Size 4kW
2,5
R410a kg
* total char-
5,22
t CO2-eq
ge
External unit charged with refrigerant (voltage 220-240/1/50)
Size 12kW
R410a kg 3,9
* total char-
8,14
t CO2-eq
ge
* It contains fluorinated greenhouse gases
External unit charged with refrigerant (voltage 380-415/3/50)
Size 10kW
4,2
R410a kg
* total char-
8,77
t CO2-eq
ge
* It contains fluorinated greenhouse gases
The refrigerant charge present in the external unit is sufficient
up to 5 meters of distance between the 2 units.
Lengths of ducting exceeding 5 metres
Further refill for distance
exceeding 5 metres
Nitrogen precharge
6kW 8kW 10kW
2,5 2,8 3,9
5,22 5,85 8,14
14kW 16kW
3,9 3,9
8,14 8,14
12kW 14kW 16kW
4,2 4,2 4,2
8,77 8,77 8,77
0,054 kg / m
A VAC vacuum gauge cock
B REF refrigerant cock
C HIGH high pressure cock
D liquid high pressure pump
Refrigerant pipe
E
Vacuum pump pipe
F
Low pressure pipe
H
I LOW low pressure cock
After having completed the refrigerating connections the
sealing of the refrigerating circuit must be checked:
maintain close the indoor unit cocks 1 and 2
connect pipes D and H to cocks 1 and 2
close cocks A, B, C and I
connect E to the nitrogen cylinder
open cocks C and I
perform the tightness test
Mode 1: open cock B, pressurize the circuit up to 45
bar (see the label) and wait few hours.
Mode 2: open cock B, pressurize the circuit up to 65
bar (as according to UNI-EN 378-2 2009:PS x 1,43 law)
spray using a leak detector spray cocks and pipes and
check if bubbles are present (gas leaks)
if everything is OK, proceed
discharge the nitrogen from the unit
1 Liquid line
2 Gas line
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