Heating; Hot Water Function; Subsequent Flushing Through Of The Heating System ("Hot") - Vaillant ecoTEC exclusive 832 Installation And Maintenance Instructions Manual

Fig. 6.7 Function check
6.3.1

Heating

• Switch on the appliance.
• Make sure that there is a heat demand for heating
(set the room thermostat or the weather-controlled
controller to "demand").
• Press "i" to activate the status indicator.
Fig. 6.8 Display during heating mode
As soon as there is a heat demand, the appliance goes
through the status displays "S. 1" to "S. 3", until the ap-
pliance is running properly in normal operation and the
display "S. 4" appears.

6.3.2 Hot water function

• Switch on the appliance.
• Turn on a hot water tap fully.
• Press "i" to activate the status indicator.
When the hot water function is working correctly the
display shows "S.14".
ecoTEC exclusive installation and maintenance instructions / 0020017768_04
Fig. 6.9 Display during hot water preparation
6.3.3 Subsequent flushing through of the heating
system ("hot")
• Allow the appliance to run until both the appliance
and the heating system have reached their operating
temperature.
• Check the heating system for leaks.
• Connect a hose to the drain valve which is located at
the lowest position in the heating system.
• Shut off the appliance, open the drain valve and all
vent valves on the radiators and allow the water to
flow out of the heating system and the boiler quickly
and fully.
• Close the drain valve.
• Re-fill the heating system with water (see Chapter 6.1.1).
• Drain water out of the system until a system pressure
of 1.0 bar is reached. (The ideal measured value on the
pressure gauge is 0.5 bar plus an extra amount corre-
sponding to the highest point of the system above the
boiler. A height of 10 m corresponds to a pressure in-
crease on the pressure gauge of around
1 bar. The pressure must not be less than 1 bar on any
installation.)
If the system is to be protected by an inhibitor, it
should be added at this stage in accordance with the
manufacturer's instructions.
Further information can be obtained from Sentinel,
Betz Dearborn Ltd., Tel.: 0151 420 9595, or from Fern-
ox, Alpha–Fry technologies, Tel.: 0870 8700362.
• Re-mount the enclosure of the boiler.
• Attach the bottom cover to the boiler by sliding the
front edge of the cover into the lip at the bottom front
edge of the appliance chassis.
• Carefully push the rear of the bottom cover upwards
until the spring retaining clips engage at the side of
the appliance. It may be necessary to adapt the bot-
tom cover by removing the easy break sections.
Start-up 6
27