Navien LST-58K, Instruction Manual

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54
Maintenance
Yearly appliance check and maintenance
The followings checks and maintenance activity should be performed
at least one time per year :
Cleaning of the burner
V isual 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
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.
V isual Checking that the outlet of the pressure relief valve is not blocked.
V isual checking that the safety and control devices have not been tampered
or short- circuited; in particular:
- Temperature safety limit thermostat
V isual 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.