Filling The Central Heating System - Vaillant VIH S GB 210/2 S Manual

7.8

Filling the central heating system

The system can be filled using the built-in filling loop
(ecoTEC plus combi boiler only) or via a separate filling
connection that is fitted at an easily accessible location
in the heating circuit. The filling loop must be removed
once filling is complete. If a temporary connection is not
possible due to legal regulations, a closed system filling
pump with a buffer tank must be used.
The heating system is not automatically supplied from
the hot water side of the central heating. Alternative
procedures for filling closed systems can be found in
BS 5449.
i
Do not use the pressure relief valve of the gas-
fired wall-hung boiler for venting.
Fig. 7.3 Two port motorised valve
> Place the lever (1) on the two port motorised valve
to "MAN OPEN" and lock it into this position.
> Flush the entire primary central heating system including
the primary heating circuit with cold and hot water.
> Flush, fill, and vent the central heating system in
accordance with the installation instructions of the gas-
fired wall-hung boiler.
> Release the lever on the two port motorised valve
by placing it in the "AUTO" position.
Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
3
4 2
5
1
Fig. 7.4 Setting thermostats
> Remove the upper front cladding (1) from the cylinder.
> Dismantle the electric immersion heater cover.
1
> Set the cylinder thermostat (3) and the electric immer-
sion heater thermostat (2) to a maximum of 60 °C for
commissioning and to achieve maximum energy effici-
ency.
> Commission the gas-fired wall-hung boiler (¬ section
7.9) until the cylinder reaches the operating temperature
and all radiators in the system are hot.
> Then drain the entire central heating system again to
remove any residue from the pipes.
> Fill and vent the entire central heating system again as
described in the installation instructions for the gas-fired
wall-hung boiler.
Commissioning 7
3
2
1
57