G O M - 영 문
77
Maintenance
The followings checks and maintenance activity should be performed at least one
time per year :
•
Cleaning of the flue side of the heat exchanger
•
Cleaning of the burner
•
Visual inspection of the exhaust duct for wear or corrosion checking
•
Correct ignition and detection
•
Correct burner setting in heating and domestic hot water production
•
Correct operation of the main switch upstream the boiler
•
Correct operation and adjustment of the boiler regarding :
- Activation of the heating control system
- Activation of the domestic hot water production system
•
Gastight of the intake gas circuit; insert a
“
U
”
or digital type pressure gauge in
the inlet gas valve socket and, subsequently, close the gas shut-off valve
(coke) and close the gas valve; no pressure variation must occur in the next
five minutes on the pressure gauge.
•
Checking of the correct activation of the detection control system; its activation
must be shorter than 10 seconds.
•
Watertight of the boiler heating and domestic hot water production circuit; no
leakage or water oxidation have to appear around the coupling.
•
Visual Checking that the outlet of the pressure relive valve is not blocked.
•
Checking that the expansion vessel charge, after having discharged the
installation up to zero pressure, is around 0.8 bar (never less than 0.5 bar);
checking that the pressure inside the boiler, in cold condition and after having
re-filled the boiler, is around 1.0-1.2 bar.
•
Visual checking that the safety and control devices have not been tampered or
short- circuited; in particular:
- Temperature safety limit thermostat
- Heating flow switch
- Air flow switch
•
Visual checking of the electrical system; in particular:
- Electrical power cable must be no damaged and properly blocked.
- No trace of blackening or burning must be exist anywhere.
Yearly Appliance Check and Maintenance
14