6
E) Checking the tightness of the refrigeration lines (Fig. 5)
1) Open the caps of the sectioning valves (Fig. A n. 1).
2) Check that the section valves are closed (Fig. A n. 2).
3) Remove the plug from the service connection on the valve
sectioning (Fig. A n. 3).
4) Connect the pressure gauge and the nitrogen bottle to the
valve stop then gradually increase the pressure in the pipes
of the refrigerant connection and in the internal module at 35
bar, in 5 bar increments (Fig. A n. 4).
5) Check the tightness of the fittings with a detector spray
escapes. If there are leaks, repeat the operations in the order
indicated and check the seal again (Fig. A n. 5).
6) Leave the circuit under nitrogen pressure for at least 24 hours
e check that at the end of this time the pressure initial does not
go down.
7) Release the pressure and nitrogen.
Fig. A
1
3
35 bar
4
2
ATTENZIONE!
2
ATTENZIONE!
5
1
Gas side cock
Liquid side tap
2.4 INSTALLAZIONE ENTRO I 5 METRI
Esempio di installazione senza ricarica aggiuntiva di gas
refrigerante R410a, distanza 4 metri.
2 m
0,5 m
1,5 m
Esempio A
della tabella 4
(Example B) INSTALLATION WITH MINIMUM PERMISSIBLE
LENGTH
If the distance between the Indoor Unit and Outdoor Unit is less
than 3 meters (as in this case where the length of the pipes does
not exceed 2 meters), the pipes must be cut at 3 meters and roll
up the final part in correspondence with the outdoor unit.
Spiral length. 1 meter
0,5 m
1,5 m
Example B
of table 4
(Example C - D - E)
(C) MAXIMUM PIPE LENGTH
(refrigerant gas
)
(D) MAXIMUM DIFFERENCE IN HEIGHT
(between U.E and U.I.)
(E) ADDITIONAL REFRIGERANT AMOUNT
(over 5 m)
In this configuration, the effective length of the pipes is 6 m
horizontally and 4 m vertically, in total 10 m.
We will then add 100 grams of R410a refrigerant gas or 5 m x 20
g / m = 100 grams.
Example C - D - E
of table 4
4 m
6 m
HR 3.0
5*m
3*m
15*m
5*m
20*g/m
HR 7.8
5*m
3*m
15*m
5*m
20*g/m
Models
A
Maximum length allowed without adding refrigerant
B
Minimum allowed length of refrigerant gas
C
Maximum length of refrigerant gas piping
D
Maximum admissible height difference between U.E and U.I.
E
Additional refrigerant quantity over 5 meters
Table 4 - Admissible distances U.I. - E.U.
Failure to comply with this application
will result in the non-ignition by the authorized assistance
Содержание HR 3.0
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