Wet-Cleaning The Boiler; Checking The Operating Pressure; Refilling With Boiler Water And Purging The System - Buderus Logano G315 Installation And Service Instructions Manual

▶ Insert the flue gas baffle plates in the flue gas passages ( Chapter
NOT DEFINED, page 20).
▶ Fasten cleanout cover and close burner door. Tighten screws evenly.
▶ Close the burner door and tighten the screws evenly.
▶ Fold the rear section thermal insulation down and pull together under
the flue outlet using the spring hook (Fig. 65, [1]).
Fig. 65 Pulling the rear section thermal insulation together
▶ Hang the bottom rear boiler panel sections on the left and right into
the slots in the folded edge of the upper rear boiler panel and the side
panel and screw the connecting plate below the flue outlet onto the
bottom boiler rear sections.
13.4

Wet-cleaning the boiler

When wet-cleaning, pick the cleaning agent based on the level of
contamination.
Proceed with wet cleaning in the same order as described for cleaning
with cleaning brushes ( Chapter 13.3, page 33).
For wet-cleaning (chemical cleaning), observe the
operating instructions of the relevant cleaning
equipment and cleaning agent. It may be necessary to
vary the wet-cleaning process from that described here.
▶ Select a cleaning agent that is appropriate for the type of
contamination (soot or encrustation).
▶ Cover the control panel with foil to prevent penetration by the
cleaning agent.
▶ Spray cleaning agent evenly from the top into the flue gas passages.
▶ Heat up the boiler to a boiler water temperature of at least 158 °F
(70 °C).
▶ Brush out the heat exchanger heater.
13.5

Checking the operating pressure

The operating pressure must be at least 15 psi (1 bar).
▶ Read the current operating pressure (psi) and temperature °F (°C)
from the temperature/pressure gauge.
▶ If the operating pressure drops below 15 psi (1 bar), refill boiler
water.
Logano G315 – 6 720 817 939 (2017/02)
Fig. 66 Pressure/temperature gauge
13.6

Refilling with boiler water and purging the system

1
720 42 21-47.1o
▶ Slowly fill the heating system via the on-site fill valve. During filling,
observe the display (pressure gauge).
▶ Once the desired operating pressure is reached, stop the procedure.
▶ Purge the heating system via the purge valves on the heating bodies.
▶ Refill with water again if the operating pressure drops as a result of
purging the system.
System inspection and maintenance
NOTICE: Risk of system damage from temperature
stresses.
▶ When the heating system is in operation, do not fill it
via the boiler fill & drain valve. Instead, use the fill
valve on the system side.
Bring the system up to the required operating pressure.
NOTICE: Risk of system damage from frequent refilling.
▶ The system may be damaged, depending on water
quality, by corrosion or scaling, if you frequently
need to re-fill your system with make-up water.
▶ Ensure that your heating system is bled.
▶ Check the heating system for leaks and the function
of the expansion vessel.
13
7 747 019 141-17.1RS
35