Operation Manual

ø 6,35 mm
1500
(153 kgf/cm)
1600
(163 kgf/cm)
ø 9,52 mm
2500
(255 kgf/cm)
2600
(265 kgf/cm)
ø 12,7 mm
3500
(357 kgf/cm)
3600
(367 kgf/cm)
ø 16 mm
4500
(459 kgf/cm)
4700
(479 kgf/cm)
ENGLISH
EN - 22
Lunghezza tubo di
connessione
Quantità aggiuntiva di
refrigerante da caricare
Inferiore a (5 x N) m ----------
Superiore a (5 x N) m
R410A: (lunghezza totale
del tubo - 5 x N) x 15 g/m,
N=2,3,4 or 5
N = n° unità interne installate
NEVER USE A NORMAL HANDSAW,
scraps could fall inside the pipe and enter the circuitry of the system, damaging

c. Remove possible burrs with the special tool.
Immediately after cutting and deburring the pipes, seal the ends with insulating
tape.
d. If you do not use preinsulated pipes, they must be insulated as follows:
 
 
2
) or 0.39 kcal/(h x C x m
2
)
 
 
Do not place both pipes in the same sheath, as this would jeopardize the proper

e. Bind any joints in the sheath securely with insulating tape.
f 
g
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 
a wrench to hold the threaded
part of the attachment still (to
prevent deformations), and a
dynamometeric wrench on the

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 
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,
External diameter
of the pipe

(N.cm)
Additional coupling
