Filling The System - Baxi MainEco Combi 24 User Manual

Baxi MainEco Combi and System 24 - 28 - 35 / 18 -24
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Filling the system

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Topping up without a refilling device:
1. Use the pressure gauge to check the water pressure in the heating
system.
2. Open the valves on all radiators connected to the heating system.
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3. Set the room thermostat to as low a temperature as possible.
4. Wait until the temperature drops below 40°C and the radiators
seem cold before filling the central heating system.
5. To fill with water, use a filling tube with two tap connections, a rag
and a bleed key.
6. Connect the filling tube to a (cold) water tap.
7. Eliminate the air from the filling tube. Slowly fill the tube with
water. Hold the end of the tube up, above a bucket. Turn off the
tap as soon as water runs out of the pipe.
8. Unscrew the plug from the filling/draw-off valve.
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9. Attach the tube to the filling/draw-off valve. Firmly tighten the nut
on the filling tube.
10.Open the filling/draw-off valve on the heating system.
11.Open the running water tap.
12.Use the pressure gauge to check the water pressure in the heating
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system.
13.Close the water tap when the water pressure reaches 2 bar.
14.Close the filling/draw-off valve on the heating system. Leave the
tube on the filling/draw-off valve until the air is purged from the
installation.
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AD-3000483-A
15.After filling the installation, switch the boiler on.
If the water pressure is lower than 0.8 bar, more water
should be added. If necessary, top up the water level in the
heating system (recommended hydraulic pressure
between 1 and 2 bar).
The filling/draw-off valve is not necessarily located next to
the boiler.
When water is added, air gets into the heating system:
Degas the installation.
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After the air has been vented, the water pressure can
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drop below the required level.
Use the pressure gauge to check the water pressure
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in the heating system.
If the water pressure is lower than 0.8 bar, more water
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should be added.
Filling and bleeding the installation 2 times a year should
be sufficient to obtain an adequate hydraulic pressure. If it
is often necessary to top up the installation with water,
contact your fitter.
5. Checking and maintenance
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