Vaillant ecoTEC plus 618 Spécifications télécharger pdf (Page 30)

30 Instructions for installation and servicing ecoTEC

5.4.3 Filling the heating system in ecoTEC pro com-

bination boilers and ecoTEC plus system boil-

ers

The ecoTEC pro combination boilers and the ecoTEC

plus system boilers do not come with a filling device. In

these appliances, water is filled in the heating system

through a filling pipe provided onsite.

• Join a hose between a cold water dispensing valve and

the 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 water

flows into the heating system. Fill the heating system

as described in Section 5.4.4.

• After filling, close the stop valve on the filling pipe and

the cold water dispensing valve and remove the filling

hose.

5.4.4 Filling the heating system for the first time

Note

As long as there is insufficient water pressure

in the heating system, the display indicator

changes between the error message F.22 and

the 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 valves on the heater are open.

• Only in ecoTEC plus combination boilers: Connect the

filling pipe as described in Section 5.4.2.

• Only in ecoTEC plus system boilers and in ecoTEC pro

combination boilers: As described in Section 5.4.3 join

a hose between the cold water dispensing valve and

the filling pipe of the heating system.

• Open the cold water dispensing valve.

• Slowly open the filling valve and let the water flow into

the heating system. Bleed the lowest radiator until the

water flows out at the bleed valve without bubbles.

• Bleed all other radiators until the heating system is

completely filled with water, all bleed valves have been

shut and the manometer pointer is in the centre of the

dark grey area. Bleed the heating pump by loosening

the central screw. Close the filling valve and the cold

water dispensing valve.

• Loosen the cap of the pump A.A.V. (automatic air vent)

(the appliance is ventilated independently by the pump

A.A.V. during continuous operation).

• Check all connections and the entire system for leaks.

5.5 Initial system flush (“cold”)

Note

The complete heating system must be flushed

out at least twice: once cold, and once hot as

instructed below.

• Check if all radiator thermostatic valves and both serv-

ice valves on the boiler 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 on

the heating elements and allow the water to flow out

of the heating system and the boiler quickly and com-

pletely to remove all installation residue from the

heating system before commissioning the boiler.

• Close the 1/2” BSP drain taps.

• Fill the heating system again with water as described

in Section 5.4.4.

• Check that the pressure relief valve of the heating sys-

tem is working by turning the handle on the valve.

• Check the pressure in the heating system and fill

water if needed.

• Close the filling valve and the cold water dispensing

valve.

5.6 Filling the condensate siphon

Fig. 5.4 Filling the condensate siphon

Danger!

Note that if the boiler is run with an empty

condensate trap there is a danger that fumes

might escape into the room and cause poison-

ing. For this reason, it is important to ensure

that the trap is topped up each time the unit is

cleaned.

• Remove the lower part (1) of the condensate siphon by

turning the bayonet catch in anticlockwise direction.

• Fill the lower part with water until about 10 mm below

the upper edge.

• Refit the lower part of the condensate siphon.

5 Commissioning Part I

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Vaillant ecoTEC plus 618 Spécifications Page 30

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