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

Contents

33Instructions for installation and servicing ecoTECNoteBoth stop valves must be closed while operat-ing the heating system and the filling pipe mustbe again detached at the double check valve.Fig. 5.3 Double check valve detached while heating5.4.3 Filling the heating system in ecoTEC pro andecoTEC plus (600 series)The ecoTEC pro appliances and the ecoTEC plus appli-ances from the 600 series do not come with a fillingdevice. In these appliances, water is filled in the heatingsystem through a filling pipe provided onsite.• Join a hose between a cold water dispensing valve andthe filling pipe of the heating system.• To fill, first open the cold water dispensing valve.• Open the stop valve on the filling pipe, so that waterflows into the heating system. Fill the heating systemas described in Section 5.4.4.• After filling, close the stop valve on the filling pipe andthe cold water dispensing valve and remove the fillinghose.5.4.4 Filling the heating system for the first timeNoteAs long as there is insufficient water pressurein the heating system, the display indicatorchanges between the error message F.22 andthe actual pressure indicator when the appli-ance is on.Fill the heating system as follows:• Open all heating element thermostat valves.• Check if both stop cocks on the heater are open.• Only in ecoTEC plus (800 series): Connect the fillingpipe as described in Section 5.4.2.• Only in ecoTEC plus (800 series) and in ecoTEC pro:As described in Section 5.4.3 join a hose between thecold water dispensing valve and the filling pipe of theheating system.• Open the cold water dispensing valve.• Slowly open the filling valve and let the water flow intothe heating system. Ventilate the lowest heating ele-ment until the water flows out at the vent valve with-out bubbles.• Ventilate all other heating elements until the heatingsystem is completely filled with water, all vent valveshave been shut and the manometer pointer is in thecentre of the dark grey area. Ventilate the heatingpump by loosening the central screw. Close the fillingvalve and the cold water dispensing valve.• Rotate the cap of the rapid action fan on the pump acouple of times to loosen it (the appliance is ventilatedindependently by the rapid action aspirator duringcontinuous operation).• Check all connections and the entire system for leaks.5.5 Initial system flush (“cold”)NoteThe complete heating system must be flushedout at least twice: once cold, and once hot asinstructed below.• Check if all heating element thermostat valves andboth maintenance taps on the heater are open.• Connect a hose to the drain valve located at the low-est position of the heating system.• Open the 1/2” BSP drain taps and all vent valves onthe heating elements and allow the water to flow outof the heating system and the heater quickly and com-pletely to remove all installation residue from theheating system before commissioning the heater.• Close the 1/2” BSP drain taps.• Fill the heating system again with water as describedin Section 5.4.4.• Check that the pressure control valve of the heatingsystem is working by turning the handle on the valve.• Check the pressure in the heating system and fillwater if needed.• Close the filling valve and the cold water dispensingvalve.Commissioning Part I 5