Viessmann Vitoclima 300-S Service Instructions For Contractors page 10

Commissioning, inspection, maintenance
Further details regarding the individual steps
A External unit
B Vacuum pump
C Filling hose for the liquid side (one
hose end with valve)
D Pressure gauge set
Evacuate the system at the service
valves of the external unit.
1. Connect the centre hose of pres-
sure gauge set D with vacuum
pump A.
2. Connect the ends of the filling hose
without valves with the connections
of the pressure gauge set D.
3. Remove the protective caps from
service valves F and connect fill-
ing hoses C and E.
10
(cont.)
E Filling hose for the suction side
(one hose end with valve)
F Service valves for the suction and
liquid side with protective caps
G Refrigerant lines to the internal
devices
4. Start vacuum pump B.
The needle of the pressure gauge
must move from 0 mPa towards
0.1 mPa.
Let the pump run for 15 min.
Note
Should the needle not move as
described, that would indicate a
leak.
Remove the leak and repeat the
process.