8
Heating system servicing
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.
45
8.6
Checking the air supply hose
V
Disconnect the corrugated hose [2] from the burner
intake silencer [3] by undoing the special hose clip [1]
and check for dirt.
V
If dirty, clean the corrugated hose [2] with a vacuum
cleaner.
Fig. 45 Inspecting the corrugated hose
1
Special hose clip
2
Corrugated hose (air supply for combustion)
3
Intake silencer
8.7
Check heating system operating pressure
In sealed systems, the operating pressure must be
15 - 30 psi (1 - 2.1 bar).
V
Check system pressure.
V
If the pressure gauge shows less than 15 psi, the oper-
ating pressure is too low. Add water to the system.
Fig. 46 Pressure/temperature gauge for showing oper-
ating pressure and supply temperature
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.
V
Ensure that your heating system is bled
properly.
V
Check the heating system for leaks and
proper operation of the expansion vessel.
Warning:
Health risk from contaminated do-
mestic water.
V
Observe all national standards and regula-
tions regarding prevention of domestic
water contamination (e.g. by water from
heating systems).
7 747 019 141-17.1RS
