Olimpia splendid ARYAL S1 E TRIAL INVERTER 21 Mode D'emploi Et D'entretien page 80

mmediately after cutting and deburring the pipes, seal the ends with insulating
I
tape.
d. If you do not use preinsulated pipes, they must be insulated as follows:
• material: polyurethane foam with closed cells
• max. coefficient of transmission: 0,45 W/ (K x m
• minimum thickness: 6 mm (for liquid pipes)
• minimum thickness: 9 mm (for gas pipes)
Do not place both pipes in the same sheath, as this would jeopardize the proper
operation of the system (fig. 19b).
e. Bind any joints in the sheath securely with insulating tape.
f. Insert the fixing nut into the pipe before performing flaring (figure 20).
g. Flare the pipe ends using the special tool. Take care not to break, crack or split the pipe (fig. 20).
h. Lubricate the connecting thread with oil for coolant.
DO NOT USE ANY OTHER TYPE OF LUBRICANT
i. Screw the pipe nut manually on
the connecting thread.
l. Tighten the nut definitively using
a wrench to hold the threaded
part of the attachment still (to
prevent deformations), and a
dynamometeric wrench on the
nut (figure 21).
Calibrate the dynamometric
wrench to the value suitable for
the pipe dimensions.
2.6.4 - Tests and inspection
After making all pipe connections, check the seal of the system.
Operate as follows:
a. Loosen the cap (20) on the gas line service fitting (figure 22).
b. Connect a tank of anhydrous nitrogen to the coupling with a 5/16" connector and a pressure reducer.
c. Open the tap on the tank and pressure reducer and bring the pressure in the circuit to 3 bar; close the
tank.
d. If after about 3 minutes the pressure does not drop, the circuit is in good working order and the pressure
can be raised to 15 bar by reopening the tank.
e. Check again after 3 minutes that the pressure remains stable at 15 bar.
f. For safety reasons apply a solution of soapy water to the connectors and check for the formation of bub-
bles revealing leakage of gas.
g. If the pressure should drop and the search on the attachments with soapy solution gives a negative
outcome, introduce R32 gas into the circuit and look for the leak using a leak detector.
Since the circuit has no welding points, the leaks should only be present in the piping joints. In this case,
tighten the nuts with greater force (figure 23), or make the attachments again with the relative flaring.
h. Repeat the seal test.
EN - 24
) or 0.39 kcal/(h x C x m
2
External diameter Coupling torque
of the pipe
ø 6,35 mm
(153 kgf/cm)
ø 9,52 mm
(255 kgf/cm)
)
2
Additional coupling
(N.cm) torque (N.cm)
1500 1600
(163 kgf/cm)
2500 2600
(265 kgf/cm)