Vailant ecoTEC plus 937, Инструкция по установке и обслуживанию

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Installation and maintenance instructions ecoTEC plus 937 0020031552_06
6.4.2 Filling device for ecoTEC plus 937
The ecoTEC plus 937 is fitted with a filling loop.
Push the double check ( 1 ) of the filling loop into the
cold water stop valve ( 2 ) and secure the double
check valve ( 1 ) with the spring clip ( 4 ).
First open the stop valve to perform the filling ( 3 ).
Open the cold water stop valve ( 2 ) so that the water
flows into the heating system. Fill the heating system
as described in
Section 6.4.3 .
After filling close both stop valves and remove the
filling loop by pulling the double check valve (
1 ) off
the cold water stop valve ( 2 ) (see Fig. 6.2 ).
3
1
4
2
Fig. 6.2 Filling device
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Both stop valves must be closed during the
operation of the heating system and the fill-
ing loop must be removed from the double
check valve again.
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1
2
Fig. 6.3 Double check valve separated from the system during
the heating process
6.4.3 Filling the heating system for the first time
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If the water pressure in the heating system is
too low the display switches between error
message “
F.22 ” and the display of the actual
pressure when the unit is switched on.
Fill the heating system as follows:
Open all thermostatic radiator valves.
Check that both stop valves on the combi boiler are
open.
Connect the filling loop as described in Section 6.4.2.
Open the water stop valve.
Slowly open the isolator valve in the filling loop so
that water can flow into the heating system. Bleed
the radiator at the lowest point until water flows out
of 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 loop
valve and the cold water stop valve.
Loosen the cap on the automatic air vent by a couple
of turns. (In continuous mode the unit is vented inde-
pendently by the automatic air vent system.)
Check all connections and the entire system for leaks.
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6 Commissioning, Part I