Action In An Emergency; Checking The Operating Pressure, Topping Off The Heating Water And Bleeding The System; 3.4.1 Checking The Operating Pressure; Topping Off The Heating Water And Bleeding - Buderus Logano plus GB312 Operating Instructions Manual

3
Recommissioning the heating system
110
100 120
90 130
Eco 140
Aut
Fig. 6 Logamatic BC10 basic control unit
Information about freeze protection can also be found in the "Water
quality requirements for Logano plus GB312" document.
3.3

Action in an emergency

The circuit-breaker for the boiler room or the heating
emergency stop switch should only be used to switch off
the heating system in an emergency.
In the event of an emergency, e.g. a fire, proceed as follows:
▶ Never put yourself at risk of fatal injury. Your own safety must always
take the highest priority.
▶ Turn off the main isolating valve.
▶ Isolate the heating system from the mains power supply by means of
the heating system emergency stop switch or the appropriate
electrical fuse/circuit breaker.
3.4 Checking the operating pressure, topping off the
heating water and bleeding the system
The water with which the heating system is first filled loses a substantial
amount of volume in the first few days due to the release of gas content.
This causes air pockets to form and the heating water starts to make
noises.
▶ With new heating systems, check the operating pressure daily at first,
topping off the heating water and bleeding the radiators if needed.
▶ Later on, check the operating pressure monthly, topping off heating
water and bleeding the boiler and radiators if needed.

3.4.1 Checking the operating pressure

Your heating contractor will have set the system to the required
operating pressure (at least 15 psi) and entered the setting in Table 1.
▶ If the temperature/pressure gauge needle drops below the minimum
pressure marker, the operating pressure is too low. The heating
system must be topped off.
8
130
110
150
90
170
190
Aut
7 747 010 720-38.2RS
Fig. 7 Pressure/temperature gauge
3.4.2 Topping off the heating 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.
▶ Connect the hose to the water tap. Push a hose filled with water onto
the hose connection of the boiler fill & drain valve, fasten with a hose
clip and open the valve.
▶ Slowly fill the heating system. Observe the pressure gauge (pressure/
temperature gauge) while doing so.
▶ Close the water tap and the boiler fill & drain valve once the required
operating pressure has been reached.
▶ Bleed the boiler by carefully opening the relief valve or an automatic
vent (supplied separately) on the boiler supply pipe when the boiler
circulation pump is running.
▶ Bleed the system via the radiator bleed valves.
▶ Top off with water if the pressure drops as a result of bleeding the
system.
▶ Remove the hose from the boiler fill and drain valve.
CAUTION: Health risk from contaminated domestic
water.
▶ It is imperative that you observe all regulations and
standards applicable in your country regarding
prevention of domestic water contamination.
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, depending on the water quality.
▶ Ask your heating contractor if the local water can be
used untreated or whether it needs to be treated.
▶ Pay attention to the water quality specified in the
"Water quality requirements for Logano plus GB312"
document. Record the top off volume as instructed
from your heating contractor in the operator's log.
▶ Notify your heating contractor if you find you need to
top off your heating system frequently.
Logano plus GB312 – 7 747 010 717 (2012/11)
7 747 010 720-24.2RS