33
1.
Carry out final checks in accordance with the
points on pages 16 to 20.
2.
Record actual values in the report (on page 55).
Checking the water quality
Enter the amount of top-up water, the total hardness
and the pH value in the tables on page 55.
For water quality requirements, see page 53.
Checking the safety valve function
Expansion vessel
Note
Observe the manufacturer's instructions for the expan-
sion vessel.
Carry out this test on a cold system.
1.
Drain the system until the pressure gauge indi-
cates "0" or close the cap valve on the expansion
vessel and reduce the pressure in the expansion
vessel.
2.
If the expansion vessel pre-charge pressure is
lower than the static system pressure, top up with
nitrogen. Top up with nitrogen until the pre-charge
pressure is 0.1 to 0.2 bar (10 to 20 kPa) higher.
3.
Top up with water. The charge pressure of the
cooled system must be 0.1 to 0.2 bar (10 to
20 kPa) higher than the pre-charge pressure of the
expansion vessel.
Permiss. operating pressure: 6 bar/0.6 MPa
Checking the mixer for ease of operation and leaks
1.
Remove the motorised lever from the mixer han-
dle.
2.
Check the mixer for ease of operation.
3.
Check the mixer for tightness. Replace the O-ring
seals if the mixer leaks.
4.
Click the motorised lever into place.
Checking the thermal insulation for firm seating
Checking the installation room ventilation air/extract air apertures
Instructing the system user
The system installer should hand the operating instruc-
tions to the system user and instruct the user in oper-
ating the system.
This includes all components installed as accessories,
e.g. remote control units. In addition, the system instal-
ler must make the user aware of the required mainte-
nance work.
Commissioning, inspection, maintenance
Performing final checks
5831036