Rinsing The Heating System For The First Time ("Cold"); Filling The Condensation Water Siphon - Vaillant ecoTEC PLUS SERIES Installation And Maintenance Manual

5 Commissioning Part I
system is completely filled with water, all vent valves
have been shut and the manometer pointer is in the
centre of the dark grey area. Ventilate the heating
pump by loosening the central screw. Close the filling
valve and the cold water dispensing valve.
• Rotate the cap of the rapid action fan on the pump a
couple of times to loosen it (the appliance is ventilated
independently by the rapid action aspirator during
continuous operation).
• Check all connections and the entire system for leaks.
5.5 Rinsing the heating system for the first time
("cold")
Note
The complete heating system must be flushed
out at least twice: once cold, and once hot as
instructed below.
• Check if all heating element thermostat valves and
both 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 on
the heating elements and allow the water to flow out
of the heating system and the heater quickly and com-
pletely to remove all installation residue from the
heating system before commissioning the heater.
• 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 control 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.
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5.6

Filling the condensation water siphon

Fig. 5.4 Filling the condensation water siphon
Danger!
If the device is operated with empty condensate
water siphon, there is risk of poisoning through
emitting flue gases.
Therefore, before commissioning, it is mandato-
ry to fill the siphon as described below.
• Remove the lower section (1) of the condensate water
siphon by turning the bayonet catch in anticlockwise
direction.
• Fill the lower section with water until about 10 mm
below the upper edge.
• Fasten the lower part again on the condensate water
siphon.
Installation and maintenance manual ecoTEC
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