Boiler Maintenance
10
Logano G125 BE - Specifications subject to change without notice.
51
10.4 Testing System Pressure
The system pressure should be 12 to 30 psi for a closed
system.
z
Check system pressure.
z
When the pressure gauge shows less than 15 psi,
the pressure is too low. Add fill water as described in
Î
Chapter 8.1, page 39 and check system pressure
once again.
10.5 Testing Relief Valve
Check the functioning of the relief valve every 1 to 3
years as required per local code.
z
Make sure nobody is near the discharge of the relief
valve.
z
Lift up on the relief valve.
The relief valve must open and discharge water. If the
valve does not discharge, replace the valve and re-
check. If the defective valve is not replaced, it can lead
to damage to certain system components due to exces-
sive high pressures.
Fig. 54
Pressure/temperature gauge to display system
pressure and supply temperature
CAUTION!
SYSTEM DAMAGE
due to frequent make up water.
When you frequently add make up water
to the system, this can lead to corrosion
and lime build-up in the system.
z
Make sure that the heating system is
equipped with automatic air elimina-
tion.
z
Verify that the system has no leaks
and check the expansion tank for
proper operation.
