Vaillant ecoTEC plus VU 446/5-5 (H-GB) Installation And Maintenance Instructions Manual

Also see for ecoTEC plus VU 446/5-5 (H-GB): Installation and maintenance instructions

Vaillant ecoTEC plus VU 446/5-5 (H-GB) Installation And Maintenance Instructions Manual Manual pdf 37 page image

Inspection and maintenance 110020261389_02 ecoTEC plus Installation and maintenance instructions 3711.1 Using the function menuThe function menu allows you to actuate and test individualcomponents in the heating installation.Menu → Installer level → Test programs → Function menu▶ Choose the heating installation components.▶ Confirm by pressing (Select).Display Testprogramme ActionT.01 Check internalpumpThe internal heating pump isswitched on and off.T.02 Checking thedomestic hotwater cylindercharging pumpThe domestic hot watercylinder charging pump isswitched on and off.T.03 Check fan The fan is switched on andoff; it runs at maximumspeed.T.04 Not activeT.05 Domestic hotwater circulationpump checkThe domestic hot watercirculation pump is switchedon and off.T.06 Check externalpumpThe external heating pump(if present) is switched onand off.T.08 Checking theburnerProduct starts up andswitches to minimum load.The flow temperature isshown in the display.▶ To terminate the function menu, select (Cancel).11.2 Carrying out electronics self-testsMenu → Installer level → Test programs → Electronicsself-testThe electronic self-test allows for pre-monitoring of thePCBs.11.3 Cleaning/checking the components1. Carry out the preparatory work before clean-ing/checking any of the components. (→ Page 37)2. Carry out the work required to finish the task aftercleaning/checking any of the components. (→ Page 40)11.3.1 Preparing the cleaning and inspection work1. Decommission the product.2. Disconnect the product from the power grid.– Take all necessary precautions to ensure that itcannot be switched back on again.3. Remove the front casing. (→ Page 10)4. Close the gas stopcock.5. Close the service valves in the heating flow and return.6. Close the service valve in the cold water pipe.7. Drain the product when you are carrying out work onhydraulic components. (→ Page 40)8. Ensure that water does not drip on live components(e.g. the electronics box).9. Use only new seals.11.3.2 Removing the compact thermal moduleDanger!Risk of death and risk of material damagecaused by hot flue gas.The seal, heat insulation and self-locking nutson the burner flange must not be damaged.Otherwise, hot flue gases may escape andcause personal injury and material damage.▶ Replace the seal each time you open theburner flange.▶ Replace the self-locking nuts on theburner flange each time you open theburner flange.▶ If the heat insulation on the burner flangeor on the back panel of the heat ex-changer shows signs of damage, replacethe heat insulation.NoteThe compact thermal module consists of five maincomponents:– Speed-regulated fan,– Gas valve assembly including support plate,– Venturi including mass flow sensor and gasconnection pipe,– Burner flange,– Premix burner.43211. Disconnect the test system's silicone pipe for checkingthe airflow rate (1).2. Undo the fixing screw (2) and remove the air intake pipe(3) from the intake stub.3. Unscrew the union nut (4) from the gas valve assembly.