Filling The Heating System - Rotex A1 BG Installation And Maintenance Instructions Manual

4.10 Filling the heating system

Only fill the heating system if all installation work has been com-
pleted.
Adjusting the pressure gauge
Before the initial filling of the system you must set the correct
minimum pressure mark on the glass of the pressure gauge
(in safety group SGB A1,
Rotate the pressure gauge glass in such a way that the
minimum pressure mark corresponds to the system height
+2 m (1 m water column corresponds to 0.1 bar).
Checking the water quality
Observe the instructions concerning the water connection
according to section 4.6.
Filling the system
WARNING!
Contamination of drinking water endangers the health.
When filling the heating system, avoid backwash
of the boiler water into the drinking water lines
(adhere to EN 1717).
With a hot water storage tank connected using the connection kit
A1 (VSA1, 15 48 22):
Engage the hand lever on the 3-way diverter valve
(see fig. 8-4) in the centre position (only possible when de-
energised).
The centre position is on stable, when the 3-way switch
valve has not power. The 3-way-switch valve unlocks
automatically, when the voltage at the drive motor for
the valve position AB-A is applied (storage tank
charging).
ZB_RoCon_VentFkt (008.1534699)
Connect the filling hose with return flow inhibitor (½") at the
filling and draining fittings (KFE cock, fig. 4-3, item 3) and
secure against sliding by using a hose clamp.
Open water cock on the supply line.
Open the KFE cock and observe the pressure gauge
(in safety group SGB A1,
Fill the system with water until the marking of the system
overpressure is roughly in the centre of the green range of the
pressure gauge display.
Close the filling & draining cock.
Vent the entire heating network (open the system control
valves).
Check the water pressure on the pressure gauge again and
top up with water if necessary.
Close the KFE cock and the water supply cock.
Remove the filling hose with backflush prevention from the
filling and draining fitting.
ZB_RoCon_VentFkt (008.1534699)
FA ROTEX A1 BGe - 02/2014
15 60 18):
15 60 18).
4 x Set-up and installation
21