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3.2maintenance
The installed electric heating boiler does not require any maintenance. However, it is
suggested that the user conduct the network inspection, and it is best to carry out an annual
inspection by the after-sales service company (not part of the warranty) before the heating
season begins. In this professional inspection, all electrical connections and water
connections should be tightened, water pumps are cleaned, safety valves and exhaust
valves and all safety elements should be checked, and the function of the boiler should be
checked in the end.
When the boiler is running in closed heating system equipped with expansion tank, the
pressure on the pressure indicator must be checked periodically. If the residual pressure
drops below the limit indicated by the installation company under cold condition, the system
should be inspected by professionals. This is not effective for the first heating, for example,
when the air in the system is released. Under such circumstances, the system should be
filled with water according to the corresponding standards.
In open systems, check the water capacity in the expansion tank and fill it up if necessary.
The following operations can only be carried out by qualified professionals, such as
our local distributor or after-sales service department.
Boiler seasonal inspection
It is recommended that the boiler be inspected at least once a year:
ŸControl device and safety device (leakage switch, contactor, thermostat, etc.) must
function correctly.
ŸThe heat exchanger must be clean and follow the introduction of the next chapter.
ŸIn the cold machine state, the water pressure is 0.1mpa, otherwise the value should be
adjusted.
ŸThe expansion tank must be full.
ŸThe circulation pump is not jammed.
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