Viessmann VITOCAL 200-G, Инструкция по установке и обслуживанию

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2. If the pre-charge pressure of the
diaphragm expansion vessel is
lower than the static system pres-
sure, top up with sufficient nitrogen
to raise the pre-charge pressure
higher than the static system pres-
sure.
Example:
Static head
(distance between the
heat source and the
highest heating surface) 10 m
= static pressure 1 bar
3. Top up with water, until the filling
pressure exceeds the pre-charge
pressure of the diaphragm expan-
sion vessel.
On a cold system, the filling pres-
sure must be approx. 0.2 bar higher
than the static pressure.
Max. operating pressure: 3.5 bar.
4. During commissioning, mark this
value on the pressure gauge as
minimum filling pressure.
System configuration
Enable the system design used (see from page 16) and any optional compo-
nents and functions at the control unit.
Only required outside German-speaking countries: Setting the display lan-
guage
1. Open cover of programming unit
(see page 113 and operating
instructions).
2. If the adjacent display appears:
Continue with point 4.
Further details regarding the individual steps
(cont.)
103
Commissioning, inspection, maintenance
55
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968
GB
Service