Vaillant ecoMAX 665 Installation And Maintenance Manual

Also see for ecoMAX 665: Instructions for use Installation and maintenance manual

Vaillant ecoMAX 665 Installation And Maintenance Manual Manual pdf 28 page image

28 Installation and maintenance manual ecoMAX 6657.2.1 Servicing the compact thermal moduleDismantling the compact thermal moduleThe compact thermal module consists of the speed-con-trolled fan, the gas fitting, the mixer tube and the burnerwith flange. These four components make up the assem-bly that is the compact thermal module. Proceed as fol-lows to dismount it: (see fig. 7.1)1910243567811Fig. 7.1 Dismounting/Mounting the compact thermal moduleDanger!There is danger of being injured or scalded atthe compact thermal module and at all compo-nents carrying water. Only work on the compo-nents once they have cooled down.The mixer tube (7) between gas control unit andburner may not be opened. It can only be guar-anteed that this component is gas-tight after ithas been inspected at the factory.• Cut off the gas supply to the appliance.• Lower the switch cabinet.• Undo the fastening screw of the air intake pipe (3)and lift the air intake pipe forward (2); remove the airintake pipe from the intake socket.• Pull the two plugs of the ignition und grounding linesoff the ignition electrode (6).• Undo the gas supply line (10) on the underside of thegas fitting (fig. 7.1).• Pull off the cable (8) at the fan motor (coupling), thePWM signal cable beneath the fan (9) and the cablefor the gas fitting (11).• Undo the six nuts (4).Caution!Under no circumstances may the compactthermal module be suspended from the flexibleappliance gas pipe.• Pull the entire compact thermal module (5) off theintegral condensation heat exchanger (1).Mounting the compact thermal moduleDanger!The silicon seal (1) and silicate cord (2) onthe compact thermal module (fig. 7.2)(SP no. 180904) must be replaced every timemaintenance is carried out. The burner flangeinsulation (3) on the compact thermal module(SP no. 180913) must not show any signs ofdamage; if it does, it must also be replaced.11223Fig. 7.2 Checking seals and burner flange insulation• Put the compact thermal module (5) onto the integralcondensation heat exchanger (1) (fig. 7.1).• Tighten the six nuts (4) evenly and crosswise.• Put the air intake tube (2, fig. 7.1) onto the intake sock-et and tighten the screw (3).• Connect the gas supply line (10) with a new seal (SPno. 981142) to the gas fitting. Use a suitable open-endspanner to do so.• Connect the two plugs of the ignition und groundinglines to the ignition electrode (6).7 Inspection and maintenance