9
Heating system inspection
Logano plus GB312 – 6 720 806 273 (2013/01)
41
9.2
General operations
The following operations are not described in any further detail in this
document. They have to be carried out nevertheless:
▶ Checking the general condition of the heating system.
▶ Visual inspection and function check of the heating system.
▶ Checking the air supply and flue pipes for proper functioning and
safety.
▶ Checking all gas and water piping for signs of corrosion.
▶ If necessary, replace any corroded pipes.
▶ Check the charge pressure of the expansion vessel.
▶ Annually check the concentration of any additives used in the water.
9.3
Checking the flue system, including the combustion
air supply, air inlet/outlet openings
Check the flue system, including air supply system and any air inlet/
outlet openings. Immediately rectify any deficiencies identified. Make
sure that the combustion air supply and the air inlet/outlet openings are
not blocked at any point.
9.4
Checking the heating system operating pressure
▶ Check the 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.
Fig. 52 Pressure/temperature gauge
▶ Fill water via the drain & fill valve.
▶ Bleed the boiler by carefully opening the safety valve or an automatic
vent (accessory) on the B-kit when the boiler circulation pump is
running.
▶ Bleed the heating system via the purge valves.
▶ Check the operating pressure again.
▶ Record the amount of water added in the operator's log.
▶ Refit boiler front panel (
Fig. 5, page 13).
9.5
Measuring the carbon dioxide content
▶ Insert the sensor into the center of the gas flow through the testing
hole in the vent pipe.
▶ Record the flue gas readings.
If the CO
2
content differs from the specified level by 0,5 %
(
Sections 7.11 to 7.13, pages 35 to 36), adjust the burner as
described in Sections 7.11 to 7.13, pages 35 to 36.
Establish an operating pressure of at least 15 psi.
CAUTION:
Health risk from contaminated drinking
water!
▶ Observe all country-specific regulations and
standards regarding the prevention of drinking water
contamination.
CAUTION:
Risk of system damage from 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 (see operator's
log in
"7747010721_GB312_Water Quality
Requirements.pdf"
).
▶ Bleed the heating system while filling.
▶ Check the heating system for leaks.
▶ Check that the expansion vessel functions properly.
Read off the operating pressure from the controller (e.g.
"P15" means 15 psi).
7 747 010 720-24.2RS
