Commissioning The Heating System; Turning The Heating System On; Checking The Operating Pressure, Topping Up The Boiler Water And Bleeding Air From The System; 3.2.1 Checking The Operating Pressure - Buderus Logano G115 WS Operating Instructions Manual

3

Commissioning the heating system

3.1

Turning the heating system on

Before switching on, ensure that:
• the operating water pressure is sufficient,
• the fuel supply has been turned on at the main shut-off valve, and
• the heating system emergency shut-off switch is in the ON position.
3.2 Checking the operating pressure, topping up the
boiler water and bleeding air from the system
The water used for filling the heating system loses a substantial amount
of volume in the first few days due to the release of its gas content. This
causes air pockets to form and the heating system starts to make noises.
B With new heating systems, check the operating pressure daily at first,
topping up the boiler water and bleeding the system and radiators (if
so equipped).
B Later on, check the operating pressure monthly, topping up boiler
water and bleeding the boiler and radiators (if so equipped).

3.2.1 Checking the operating pressure

Your heating contractor will have set the system to the required
operating pressure of at least 15 psi (1 bar) and entered the setting in
Tab. 1, page 5.
B Read the current operating pressure (psi) and temperature (°F) from
the temperature/pressure gauge.
B If the temperature/pressure gauge needle drops below the minimum
pressure marker of 15 psi, the operating pressure is too low. Top up
the system until the contractor's selected operating pressure is
reached.
Fig. 2 Pressure/temperature gauge
Logano G115 WS US/CA – 6 720 804 873 (2012/10)

3.2.2 Topping up the boiler water and bleeding the system

Ask your heating contractor to show you where the boiler fill & drain
valve for topping up the heating system is located in your heating
system.
B If there the fill valve is not hard piped to the water supply, you will
need to connect a hose.
B Fill the heating system by slowly opening the fill valve. Observe the
pressure gauge (pressure/temperature gauge) while doing so.
B Close the boiler fill valve once the required operating pressure has
been reached.
B Bleed the system via the air vent and the radiator bleed valves (if so
equipped).
B Top up with additional water if the pressure drops as a result of
bleeding the system.
7 747 010 720-24.2RS
Design operating pressure
(optimum setting)
Maximum heating system operating
pressure
(standard = 30 psi)
Table 1 Operating pressure (entered by system installer)
Commissioning the heating system
CAUTION: Health risk from contaminated domestic
water.
B It is imperative that you observe all regulations and
standards applicable in your country regarding
prevention of domestic water contamination.
CAUTION: Risk of damage to system due to temperature
stress.
If you fill the heating system when it is hot, the resulting
temperature stress can cause stress cracks and a leak in
the boiler.
B Only fill the heating system when cold (the flow
temperature should be no more than 100 °F).
CAUTION: Risk of 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 due to repeated introduction of oxygen.
B Ask your heating contractor if the local water can be
used untreated or whether it needs to be treated.
B Notify your heating contractor if you find you need to
top up your heating system frequently, as there may
be a leak.
Operating pressure
_____________ psi
_____________ psi
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