And Venting The System - Buderus Logano plus GB402 Operating Instructions Manual

4.3.2 Topping up the heating water and venting the system
Ask your heating contractor to show you where, outside
the boiler itself, the boiler drain & fill valve for topping up
the heating water is located in your heating system.
CAUTION: Health risk from contaminated
drinking water!
B Observe all national standards and
regulations regarding prevention of
domestic water contamination (e.g. by
water from heating systems).
B In Europe, observe standard EN 1717.
NOTICE: System damage due to
temperature fluctuations!
Temperature stresses can cause cracks if
you fill your heating system when it is hot.
The boiler will then leak.
B Only fill the heating system when cold
(the flow temperature should not exceed
40 °C).
NOTICE: System damage due to frequent
topping up!
If you have to top up the heating water
frequently, the heating system may suffer
damage from corrosion or scaling,
depending on the water quality.
B Ask your heating contractor if the local
water can be used untreated or whether it
needs to be treated.
B Should the fill/top-up water need
treatment, let your heating contractor top
up your heating system.
B Observe the water quality specified in
the operator's log "Water quality
requirements for heat sources made from
aluminium". Enter the amount of top-up
water into the operator's log, as the
heating contractor has shown you.
B Notify your heating contractor if you find
you need to top up your heating system
frequently.
Logano plus GB402 - Subject to technical modifications.
Operating the heating system
B Connect hose to the water tap. Push the water-filled
hose onto the hose ferrule of the boiler fill & drain valve,
fasten with a hose clip and open the valve.
B Slowly fill the heating system. Observe the pressure
gauge whilst filling.
B Close the water tap and boiler drain & fill valve once the
required operating pressure has been reached.
B Vent the heating system via the radiator bleed valves.
B Top up with water if the operating pressure has fallen
as a result of the venting process (see setting for red
needle on the pressure gauge
B Remove the hose from the boiler fill & drain valve.
Operating pressure
Set operating pressure
(optimum value)
Tab. 7 Operating pressure (entered by the heating
contractor)
4
Fig. 10, page 14).
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