Checking The Expansion Vessel; Recommissioning The Boiler; Test Operation - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

7.4

Checking the expansion vessel

Fig. 7.10 Checking expansion vessel admission pressure
Note
It is not necessary to perform this check every
year – a check every three years is sufficient.
• Ensure the boiler CH service valves are closed.
• Release the pressure from the boiler.
• Remove valve cap from expansion vessel charge point.
• Check that the internal charge pressure of the expan-
sion vessel is between 0.75 and 0.9 bar.
If the pressure is lower than this the vessel should be
repressurised using an air pump.
• Refit the valve cap.
• Repressurise boiler and heating system.
Instructions for installation and servicing ecoTEC
Inspection and maintenance 7
7.5

Recommissioning the boiler

• Carry out electrical safety checks.
• Turn on the electrical supply.
• Open the boiler CH service valves.
• Carry out function checks of boiler operation as previ-
ously detailed.
• Check gas rate as previously detailed.
• Check for water leaks.
• Refit case, ensuring that a good seal is obtained.
1
7.6

Test operation

Always perform the following checks after completing
any maintenance task:
• Commission the appliance according to the relevant
operating manual.
• Check the appliance for gas and water leaks.
• Check the air/flue gas system for leaks, check its fas-
tening
• Check for ignition and an even flame on the burner.
• Check that the heating system and the water heating
is working (only 800 series).
• Fill out the benchmark logbook.
Fig. 7.11 Function check
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