Commissioning; Checking The Operating Pressure, Topping Up The Heating Water And Venting The System; Checking The Operating Pressure; Topping Up The Heating Water And Venting The System - Buderus Logano plus GB402 Series Operating Instructions For Users

3

Commissioning

3.1 Checking the operating pressure, topping up the
heating water and venting the system
3.1.1

Checking the operating pressure

Your heating contractor will have set the red needle of the pressure
gauge [1] to the required operating pressure (at least 1 bar) and will
have recorded this value in table 8, page 14.
▶ Check that the pressure gauge needle [2] is within the green band
[3}.
▶ If the pressure gauge needle drops below the green band, top up the
heating water.
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Fig. 2 Pressure gauge for sealed systems
[1] Red needle
[2] Pressure gauge needle
[3] Green marking
Operating pressure
Set operating pressure
(optimum value)
Table 2 Operating pressure (entered by the heating contractor)
Logano plus – 6720865368 (2019/05)
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6 720 615 876-59.2T
_____________ bar
3.1.2

Topping up the heating water and venting the system

CAUTION:
Health risk through contaminated drinking water!
▶ Observe all country-specific regulations and standards regarding the
prevention of drinking water contamination.
▶ In Europe, observe standard EN 1717.
NOTICE:
Material damage due to thermal stresses!
When topping up a hot boiler with cold heating water, thermal stresses
can lead to cracking due to internal stress.
▶ Only fill the heating system when cold. Maximum flow temperature
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 through corrosion or scaling, depending on the water
quality.
▶ Ask a certified heating contractor if the local water can be used
untreated or whether it needs to be treated.
▶ Notify your heating contractor if you frequently need to top up your
heating system.
Topping up heating water is different for individual heating systems.
Therefore, ask your approved contractor to advise you accordingly.
The refill quantities must be documented in the operator's log.
3.2

Switching on the heating system

Observe technical documentation of the installed control unit.
Before switching on (Chapter 2.3.1), ensure that:
• the operating pressure is high enough,
• the fuel supply has been turned on at the main shut-off valve, and
• the heating system emergency stop switch is switched on.
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Commissioning
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