Bedienungsanleitung Ariston ALYS (Seite 42 von 152) (Englisch, Holländisch, Französisch, Italienisch, Portugiesisch, Spanisch)

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CONNECTION PIPING

PIPE UNIONS

LIQUID COCK

GAS COCK

4. Connect the pipes using two spanners, taking care not to damage the

piping. If the tightening force is insufﬁ cient, then there may well be

leaks. And if the tightening force is excessive, then there may also be

leaks as the ﬂ ange could be damaged. The safest system is constructed

by tightening the connection using a ﬁ xed spanner and a dynamometric

spanner: in this case, use the table "tightening torques for ﬂ ange con-

nections".

5. We recommend you leave an extra 50 cm of pipe for any subsequent

work carried out in the vicinity of the cocks.

2.8 Connections to the external unit

Screw the pipe unions onto the external unit connections with the same

tightness as for the internal unit.

To avoid leaks, pay particular attention to the following points:

- Tighten the pipe unions, taking care not to damage the piping.

- If the tightening force is insufﬁ cient, then there may well be leaks. And

if the tightening force is excessive, then there may also be leaks as the

ﬂ ange could be damaged.

- The safest system is constructed by tightening the connection using a

dynamometric spanner: in this case, use the tables below (for copper

piping).

TIGHTENING TORQUES FOR FLANGE CONNECTIONS

Pipe Tightening torque

[kgf x cm]

Corresponding effort

(using a 20 cm spanner)

6.35 mm (1/4”) 160 - 200 wrist force

9.52 mm (3/8”) 300 - 350 arm force

12.70 mm (1/2”) 500 - 550 arm force

15.88 mm (5/8”) 630 - 770 arm force

TIGHTENING TORQUE FOR PROTECTION CAPS

Tightening torque [kgf x cm]

Service connection 70-90

Protection caps 250-300

LENGTH OF THE PIPING

The maximum length for the connection piping varies depending on the

model. When the length is over 5 m, take care to add the right amount of

refrigerant per metre.

If you need to install the external and internal units with a height difference

over 5 m (ﬁ g. B and ﬁ g. C), use siphons on the gas piping in order to allow

oil to return to the compressor properly.

NOTE:

We recommend making a loop in the piping near the external unit, so as to

reduce the vibrations transmitted from that point.

IMPORTANT: CHECK FOR REFRIGERANT LEAKS

Once you have created the connections and a vacuum, open the cocks so

that the gas ﬁ lls the piping and always check for leaks using a leak detec-

tor (risk of personal injury from cold burns).

2.9 Creating a vacuum and checking the seal

A vacuum pump suitable for use with R410A must be used to bleed the

circuit.

Make sure the vacuum pump is ﬁ lled with oil to the level indicated by the

oil indicator light, and that the two cocks on the external unit are shut off:

max 8 (10) m

5 m

ﬁ g. B

max 8 (10) m

5 m

ﬁ g. C

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