Connecting The Safety Valve Drain Pipe; Checking The Heating Circuit; Filling The Installation - DeDietrich MIT-M /E Installation, User And Service Manual

Fig.21
Ø32
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7756241 - v02 - 19062020
5.6.8

Connecting the safety valve drain pipe

1. Connect the outlet pipe to the waste water discharge.
Caution
The discharge pipe in the safety valve or unit must not be blocked.
MW-1001679-1
5.6.9

Checking the heating circuit

1. Check the volume of the expansion vessel(s) is sufficient for the
volume of water in the heating installation.
2. Check the inflation pressure of the expansion vessel(s).
3. Check that the heating circuit contains adequate water. If necessary,
top up with more water.
4. Check that the water connections are properly sealed.
5. Check that the heating circuit has been correctly purged.
6. Check that the filters are not clogged. Clean them if necessary.
7. Check that the valves and thermostatic radiator valves are open.
8. Check that all settings and safety devices are working correctly.
5.6.10

Filling the installation

Cleaning and flushing the installation
Flushing procedure
Caution
To prevent impurities getting into the expansion vessel, it is
recommended that the expansion vessel is separated during the
flushing and filling phases.
Flush the installation to evacuate any particles that may damage certain
devices such as safety valves, pumps, valves, etc.
Flushing new installations and installations less than 6 months
old
Before filling the heating installation, it is essential to remove any debris
(copper, caulking, soldering flux) from the installation.
1. Clean the installation with a powerful universal cleaner.
2. Flush the installation with at least 3 times the volume of water
contained in the central heating system (until the water runs clear and
shows no impurities).
Flushing an existing installation
Before filling the heating installation, it is essential to remove any sludge
deposits which have accumulated in the heating circuit over the years.
1. Remove any sludge from the installation.
2. Flush the installation with at least 3 times the volume of water
contained in the central heating system (until the water runs clear and
shows no impurities).
Filling the heating circuit
Fill the heating installation once it has been cleaned and flushed.
5 Installation
MIT-M 31