Checking The Flue System Inc. Combustion Air Supply, Inlet And Outlet Air Vents; Checking The Heating System Operating Pressure - Buderus Logano plus GB312 Installation Manual

9
Heating system servicing
9.3

Checking the flue system inc. combustion air supply, inlet and outlet air vents

Check the flue system including air supply system and any
air inlet/outlet vents. Immediately rectify any deficiencies
identified. Make sure that the combustion air supply and
the air inlet and outlet vents are not blocked at any point.
9.4

Checking the heating system operating pressure

Establish an operating pressure of at least
15 psi.
V Check system pressure
If the temperature/pressure gauge needle drops below
the minimum pressure marker, the operating pressure
is too low. The heating system must be topped up.
Caution: Health risk from contaminated do-
mestic water.
V It is imperative that you observe all regula-
tions and standards applicable in your
country regarding prevention of domestic
water contamination.
Caution: Risk of system damage due to fre-
quent topping up
If you have to top up the heating water fre-
quently, the heating system may suffer dam-
age from corrosion or scaling, depending on
the water quality (see operator's log in "Wa-
ter quality requirements for Logano plus
GB312" manual).
V Bleed the heating system while filling.
V Check the heating system for leaks.
V Check that the expansion vessel functions
properly.
V Replenish with water via the boiler fill & drain valve.
V Bleed the boiler by carefully opening the safety valve or
an automatic vent (supplied separately) on the B-kit
when the boiler circulation pump is running.
V Bleed the system via the radiator bleed valves.
V Check the operating pressure again.
V Record the amount of water added in the operator's
log.
Read off the operating pressure from the pro-
grammer (e.g. "P15" means 15 psi).
V Refit boiler front panel (
58
Fig. 5, page 15).
Logano plus GB312 - Technical specifications are subject to change without prior notice
Fig. 52 Pressure/temperature gauge
7 747 010 720-24.2RS