INSTALLATION MANUAL
23
8.2 Tightening
nuts
Warning:
While opening or closing gas taps, as described in the following steps, you must not expose
your face to the service openings and / or any other openings when you try to insert the Allen
key; remember that the system is under pressure.
A. Remove the caps from the two taps using Allen key; open the two caps to their fully
open position. Finally, close back the two caps.
B. Check the connectors using a leakage-detecting device, or by solution of water and
soap in order to make sure that there is absolutely no leakage in all the connection sites.
C. The outdoor unit is delivered with some amounts of gas and oil - sufficient for tubes with
the length specified in the nameplate located on the side of the unit. If adding gas is
required, only an authorized technician must do it, and only by means of a gas charging
measuring tube, or an electronic scale - all that after performing vacuum.
Table 3. Torque values for tightening the connectors
Tube diameter (inch)
Torque (N.m)
1/4
3/8
1/2
5/8
3/4
Flare nut
11-13
40-45
60-65
70-75
80-85
Protective cap
13-20
13-20
18-25
18-25
40-50
Service valve
11-13
11-13
11-13
11-13
11-13
1. Tap cap
2. Crevice for inserting Allen key
3. Protective cap
4. Tap
5. Service valve
6. Flare nut
7. Unit back
8. Tubes
Fig. 26. Service tap for the cooling system
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