Technical data

62
2) Fully open the domestic water supply stopcock or valve in the supply
to the boiler.
3) Open the domestic water isolation valve below and adjacent to the
boiler.
4)Openallhotwaterdraw-offtapsandclosethemwhenwaterows.
Check for water soundness of the whole domestic water system and
boiler.
5) Pressurize the system until the pressure is 1.5 bars.
6) Open the automatic air vent cap located at the top of the pump. Ensu-
re that the automatic air vent is operating correctly.
7) Check the operation of the safety valve by turning the safety valve
knob clockwise until venting can be detected.
8) Take care not to splash any of the electrical components.
9) Check the heating system and boiler for water soundness.
10) Lower the pressure to the initial cold fill design pressure of 1.0 – 1.2
bars are attained.
11) Open the front casing and undo the screw on frontal face of the
pump to access the pump shaft.
12) Check that the pump is not blocked by rotating the shaft with a screw
driver (the shaft can be forced an amount to rotate, to get rid of pos-
sible adhesion due to inactivity for long time).
7.2 Start up
• Openthegasisolatingcockadjacenttotheboiler.
• Turnontheelectricalsupplytotheboiler
• Setthecentralheatingtemperaturecontroltomaximum.
• The automatic ignition will start. In new installations it may take a
short while for any air in the line to be expelled. If ignition does not
take place the burner lockout light will be lit.
• Resetthecontrolsystemandrepeatasrequireduntiltheboilerfires
normally.