Alarko HARMONY - D, Инструкции по установке и обслуживанию, Страница: 59 / 72

59
Filter at the cold-water inlet of the boiler might be blocked, call the ser-
vice.
Heating system temperature is rapidly increasing and the boiler is stop-
ping!
There might be air in the system. Vent the system and re-start. If the
problem repeats, call the service.
5.3 PERIODIC MAINTENANCE
Harmony- D boilers require very little in the way of routine maintenance.
Check the system pressure gauge from time to time and report any con-
tinued fall in pressure to the authorized service personnel. Keep the
external casing of the boiler clean by wiping with a soft damp cloth - do
not use abrasive cleaners.
If it is suspected that there may be a fault with either the system or the
boiler, then do not use the appliance until the suspected fault has been
investigated and rectified by a competent person.
To ensure the continued efficient and safe operation of the appliance, it
is recommended that it is checked and serviced at regular intervals by
the authorized service. The frequency of servicing will depend upon the
particular installation and usage, but in general once a year is sufficient.
All service work must be carried out only by authorized service person-
nel. The manufacturer will not take any responsibility for any hazard ca-
used by unauthorized people.
Controls to be done during routine maintenance are listed below:
• Listening to the user’s claims.
• Cleaning of main heat exchanger. Fan motor control
• Functionality control of air pressure switch and hose connection cont
-
rol (room sealed models)
• Control and cleaning of burner injectors.
• Control of insulation panels of combustion room.
• Control and adjustment of electrodes.
• Electric and electronic circuit control.
• Pump control and 3-way valve functionality control.
• Gas side pressure control of expansion vessel.