MAXA 3500 W Manual Usuario/Instalador página 65

Pipe gauge
6.7. For Units with Twins Function (not available)
6.7.1 Length and drop height permitted of the refrigerant piping
Note: Reduced length of the branching tube is the 0.5m of the equivalent length of the pipe.
6.8 Vacuum with vacuum pump
1) Use the vacuum pump which vacuum level lower than -0.1MPa and the air discharge capacity above 40L/min.
2) The outdoor unit is not necessary to vacuum, don't open the outdoor unit gas and liquid pipe shut-off valves.
3) Make sure the vacuum pump could result as -0.1MPa or below after 2 hrs or above operation. If the pump operated 3
hrs or above could not achieve to -0.1MPa or below, please check whether water mix or gas leak inside of the pipe.
Tightening torque
Ф6.35
15 ~ 16 Nm / (153 ~ 163 kgf cm)
Ф9.52
25 ~ 26 Nm / (255 ~ 265 kgf cm)
Ф12.7
35 ~ 36 Nm / (357 ~ 367 kgf cm)
Ф15.9
45 ~ 47 Nm / (459 ~ 480 kgf cm)
Ф19.1
65 ~ 67 Nm / (663 ~ 684 kgf cm)
Total pipe length (Actual)
Max. branch pipe length
Max. branch pipe length difference
Max. height difference between indoor
unit and outdoor unit
Max. height difference between indoor
units
Outdoor unit
L
A
The line branch pipe
L
2
Connect with vacuum pump
Perform the pump (last for 2 hrs or above)
When get the vacuum level -0.1MPa, the
pump should keep running for 20-60 mins
Shut down the vacuum pump
Place the vacuum state unused (1 hrs or above)
Permitted value
5300W+5300W
7100W+7100W
L
1
1. Close-off the valve of
vacuum meter.
2. Cut off the connection
between pressure meter
and vacuum pump.
3. Close the vacuum pump.
Fig. 5-4
65
Flare shape
90° ± 4
A
R 0.4~0.8
Piping
30m
L+L1+L2
50m
15m L1, L2
10m L1-L2
20m H1
0.5m H2
Indoor unit