Vaillant ECOTEC EXCLUSIVE 627 VU 256/5-7 Installation And Maintenance Instructions Manual

Vaillant ECOTEC EXCLUSIVE 627 VU 256/5-7 Installation And Maintenance Instructions Manual Manual pdf 31 page image

Inspection and maintenance 100020193966_01 ecoTEC exclusive Installation and maintenance instructions 31Display Testprogramme ActionT.06 Check externalpumpSwitch the external pump onand off.T.08 Checking theburnerProduct starts up andswitches to minimum load.The flow temperature isshown in the display.10.2 Electronics self-testMenu → Installer level → Test programs → Electronicsself-testYou can use the electronics self-test to check the PCB.10.3 Working on the compact thermal module10.3.1 Removing the compact thermal moduleNoteThe compact thermal module consists of fourmain components:– Speed-regulated fan,– Gas valve,– Burner flange,– Premix burner.Danger!Risk of death and risk of material damagecaused by hot flue gas.The seal, insulating mat 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 insulating mat on the burner flangeor on the back wall of the heat exchangershows signs of damage, replace the insu-lating mat.1. Disconnect the product from the power supply.2. Close the gas isolator cock.3. Remove the front casing.4. Tilt the electronics box forward.1235. Unscrew the retaining screw (2) and remove the airintake pipe (1) from the intake stub.6. Unscrew the cap nut from the gas valve (3).13245767. Remove the ignition line plug (2) and the earth line plug(3) from the ignition electrode.8. Remove the plug (7) from the fan motor by pushing inthe latching lug.9. Remove the two plugs from the gas valve (6).10. Unscrew the four nuts (1).11. Remove the entire compact thermal module (5) fromthe heat exchanger (4).12. Check the burner and the heat exchanger for damageand dirt.13. If necessary, clean or replace the components accord-ing to the following sections.14. Fit a new burner flange seal.15. Check the insulating mat on the burner flange and onthe back wall of the heat exchanger. If you notice anysigns of damage, replace the relevant insulating mat.