45
2.
If the pre-charge pressure of the
expansion vessel is lower than the
static system pressure, top up with
nitrogen until the pre-charge pres-
sure is 0.1 to 0.2 bar (10 to 20 kPa)
higher.
3.
Top up with water until the charge
pressure of the cooled system is 0.1
to 0.2 bar (10 to 20 kPa) higher than
the pre-charge pressure of the
expansion vessel.
Permiss. operating pressure: 5.2 bar
(520 kPa)
Checking the mixer for ease of operation and leaks
1.
Remove the motorised lever from the
mixer handle.
2.
Check the mixer for ease of opera-
tion.
3.
Check the mixer for tightness.
Replace the O-ring gaskets if the
mixer is leaking.
4.
Snap the motorised lever into place.
Instructing the system user
The installer should instruct the user in
the operation of the system.
Operating and service documents
1.
Complete and detach the customer
registration card:
■ Hand system users their section for
safekeeping.
■ Retain the heating contractor's
section.
2.
File all parts lists, operating and serv-
ice instructions in the folder and hand
this over to the system user.
The installation instructions are no
longer required after the installation is
complete and therefore do not need
to be retained.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5794 780 GB
Summary of Contents for 7502860
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