First Flushing Of The System; Filling And Bleeding From The Hot Water Side; Filling The Condense Trap - Vaillant ecoTEC exclusive 832 Installation And Maintenance Instructions Manual

6 Start-up
Proceed as follows to fill the system:
> Open all radiator valves on the system.
> Ensure that the boiler CH service valves are open.
> Check the flexible filling loop is connected.
> Locate the filling valve handle (1) and open.
> Locate the filling valve handle (2) and open to allow
water to enter the system. Starting with the lowest
radiator, open the radiator air release until water
(clear of bubbles) is emitted.
> Repeat this at all radiators until the complete system
is full, all air locks have been cleared and the boiler
pressure gauge reads 150 kPa (1.5 bar). Release any
air from
the pump by slackening the centre screw. Turn off the
filling valve (2) and fully close filling valve (1).
> The boiler is equipped with an automatic air release
valve. To allow this to vent the boiler, the cap on the
top must be slackened by 1 –2 turns (This cap must be
left slackened during boiler operation to ensure any
residual air or system gases are released).
> Check the heating system and boiler connections are
sound.
i
Use the test programme P.0 to vent the boiler
and the heating system: The unit does not
start in heating mode, the heating pump
switches on and off and alternately vents the
heating circuit and the hot water circuit, see
Section 9.2.
6.1.3

First flushing of the system

i
The entire heating system must be flushed
through completely at least twice: once cold
and once hot, in accordance with the follow-
ing instructions.
> Check if all radiator thermostat valves and both
maintenance cocks on the boiler are open.
> Connect a hose to the drain valve which is located at
the lowest position in the heating system.
> Open the 1/2" KFE drain cocks and all the vent valves
on the radiators so that the water flows quickly and
completely out of the heating system and the boiler,
in order to remove the contamination caused during
the installation out of the heating system before the
boiler is started up.
> Close the 1/2" KFE drain cocks.
> Re-fill the heating system with water as described in
Section 6.1.1.
> Check that the over-pressure valve in the heating
system is functioning correctly by turning the handle
on the valve.
> Check the pressure in the heating system and top
up with water if necessary.
> Close filling valve 1 and filling valve 2.
28
6.1.4

Filling and bleeding from the hot water side

> Open the cold water stop cock on the appliance on
the inlet combination.
> Fill the hot water system by opening all the hot water
taps until water comes out.
> As soon as water comes out of all the hot water taps,
the hot water circuit is filled completely and also
vented.
6.1.5

Filling the condense trap

a
Danger!
Risk of poisoning due to escaping flue gas!
Flue gases may escape through the empty
condensate siphon.
> Fill the condensate siphon with water to
prevent flue gas from escaping through the
siphon.
1
Fig. 6.4 Filling the condense trap
Fill the trap as follows:
> Unscrew the lower section of the trap (1) from the
condense trap.
> Fill the lower section of the trap (1) 3/4 full with water.
> Screw the lower section of the trap back onto the
condense trap.
Installation and maintenance instructions ecoTEC exclusive 0020017768_07