Filling And Commissioning The Heating System - Viessmann VITORONDENS 200-T Service Instructions Manual

Filling and commissioning the heating system

Operating instructions, service instructions –
control unit and burner
1. Check that the ventilation air aperture in the instal-
lation room is open.
2. Check the pre-charge pressure of the expansion
vessel.
If the pre-charge pressure of the expansion vessel
is lower than the static system pressure, top up
with sufficient nitrogen to raise the pre-charge
pressure higher (0.1 to 0.2 bar/10 to 20 kPa) than
the static system pressure.
The static pressure corresponds to the static head.
3. Open the check valves.
4.
A
Fig. 1
Filling/draining
A
Fill the heating system with water and vent it until
the charge pressure is higher (0.1 to 0.2 bar/10 to
20 kPa) than the pre-charge pressure of the
expansion vessel (see page 17).
Permiss. operating pressure: 3 bar (0.3 MPa)
Note
Let the heating circuit pump run whilst filling in
order to vent the indirect coils.
Fill water
According to EN 1717 with DIN 1988-100, as a heat
transfer medium for DHW heating, the heating water
must meet fluid category ≤ 3. This requirement is met if
water of potable quality is used as heating water. For
example, if additives are used, the additive manufac-
turer must specify which category the treated heating
water comes under.
Commissioning, inspection, maintenance
5.
A
Fig. 2
Mark the charge pressure at pressure gauge
6. Return the check valves to their operating position.
7. Open the oil shut-off valves.
8. Fill trap with water (see page 16).
.
A
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