INSTAllATION
18
If the pressure has not risen again:
—
remove the tube of the pressure gauge unit from the ser-
vice connection on the 3-way shut-off valve
A Opening
B Closing
1 Service connection blanking plug
2 On-off valve shaft
3 Refrigerating pipe attachment
4 On-off valve cover plug
5 Hex wrench
1
2
3
4
5
A
B
—
fully open the unit shut-off valves
—
refit the valve covering plug
9
Carefully check for absence of leakages from the closing
point of the plug.
9
Do not force beyond the stop point to prevent damaging the
shaft and causing leakage as a consequence.
9
Once the check has been completed, remove any residues of
the water-soap solution.
9
Do not use the same vacuum pump with different refriger-
ants.
9
The vacuum pump must be periodically serviced and oil pu-
rity must be checked.
9
After having created the vacuum and established the elec-
tric connections, proceed with the additional refrigerant
charge (see chapter "Additional refrigerant charge"
p. 23).
