Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

Also see for ecoTEC plus 612: Instructions for use Instructions for installation and servicing Installation and maintenance instructions Instructions for use Installation and maintenance manual

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Vaillant ecoTEC plus 612 Instructions For Installation And Servicing Manual pdf 42 page image

Supplied By www.heating spares.co Tel. 0161 620 667742 Instructions for installation and servicing ecoTEC7.4 Checking the expansion vessel1Fig. 7.10 Checking expansion vessel admission pressureNoteIt is not necessary to perform this check everyyear – 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 berepressurised using an air pump.• Refit the valve cap.• Repressurise boiler and heating system.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.7.6 Test operationAlways perform the following checks after completingany maintenance task:• Commission the appliance according to the relevantoperating 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 heatingis working (combination boilers only).• Fill out the Benchmark gas boiler commissioningchecklist at the rear of this guide.Fig. 7.11 Function check8 Troubleshooting8.1 Logical fault finding procedureThese checks must be carried out before attempting touse the fault finding guide.1. Carry out electrical safety checks (see section‘Preliminary Electrical Checks’).2. Check that the external electricity supply to the boileris on, and a supply of 230 V~ is present between boilerterminals ‘L’ and ‘N’.3. Check that the gas supply to the boiler is on, that ithas been correctly purged and that an inlet pressureof 20 mbar is available at the gas valve. (See section‘Gas Supply’).4. Ensure the heating system is full of water and chargedto between 1 and 1.5 bar. If not, refill and vent the sys-tem. (See section ‘Filling the heating system’). Ensureboiler flow and return service valves are open.5. Check that the main on/off control is set to the ‘on’position.6. Set the central heating temperature to maximum.7. Set the domestic hot water temperature to maximum(combination boilers only).8.Check that all external controls are on and calling forheat (if no external controls are fitted, boiler terminals3 and 4 must be linked). Check that the boiler anti–cycling economiser is not engaged.7 Inspection and maintenance8 Troubleshooting