Filling The Heating System In Ecotec Pro Combi; Nation Boilers And Ecotec Plus System Boilers; Filling The Heating System For The First Time; Initial System Flush ("Cold") - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing
Wall hung room sealed fan assisted condensing boiler
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Also See for ecoTEC plus 612:
- Installation and maintenance instructions manual (52 pages) ,
- Instructions for installation and servicing (184 pages) ,
- Instructions for use manual (20 pages)
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The ecoTEC plus combination boiler will be delivered
with a filling loop.
• Insert the double check valve (1) of the filling pipe at
the cold water shutoff valve and secure the double
check valve with the spring clip (2).
• To fill, first open the stop valve (3).
• Open the stop valve (4), so that water flows into the
heating system. Fill the heating system as described in
Section 5.4.4.
• Close both stop valves after filling and detach the fill-
ing device by pulling the double check valve from the
cold water stop valve.
Note
Both stop valves must be closed while operat-
ing the heating system and the filling pipe must
be again detached at the double check valve.
Fig. 5.3 Double check valve detached while heating
5.4.3 Filling the heating system in ecoTEC pro com-
bination boilers and ecoTEC plus system boilers
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.
Commissioning Part I 5
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 loos-
ening 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
service 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
system 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.
Page 31
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