Roberts Gorden Dualair DA260G Series, Инструкция по установке, наладке, обслуживанию и эксплуатации

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6.2 Fan/Motor Assembly
The main fan requires very little maintenance as the bearings are sealed for life and need no lubrication.
If the fan blades need cleaning, use a small brush or duster to clean the fan blades from each side of
the fan.
Check the condition and tension of the drive belts see Fig 6.1. The condition is best inspected with
the belts removed, examine for chaffing or lateral cracks. Replace belts as a matched pair as necessary
.
Do not over-tighten belts as this may cause bearing damage.
6.3 Heat Exchanger (Heater Section)
The heat exchanger should remain clean unless some problem has developed with combustion.
However, an inspection of the condition of the heat exchanger is well worth while especially looking
for signs of overheating at the lower edges with may indicate burner over firing or persistently low air
flows. Any deposits in the heat exchanger may be removed with a small flue brush and vacuum
cleaner from the burner compartment after first removing the burner tray.
6.4 Gas Control Valves
There is no regular maintenance required on these devices. To change gas control valves, see
Section 7.4.
It is not recommended for gas control valves to be repaired or disassembled on site. Any
faulty gas valve should be changed for the correct replacement.
6.5 Air Filters
The air filters should be inspected regularly to ensure that no excessive build up of deposit is being
experienced. If heavy deposit is being formed, then the filters may be cleaned using a vacuum cleaner
to reduce the soiling. However filters should be changed for new ones at least every three months to
ensure that adequate air flow is being provided especially when cooling is in regular operation.
The cooling equipment will automatically turn off should the air flow drop to a preset low value even
though the fan will still run. The maximum final resistance across a dirty filter should be no more that
150 Pa (1.5 mbar). A resistance higher than this indicates that the filters must be replaced.
When changing filters it is good practice to clean the surface of the cooling coil with a soft brush and
vacuum cleaner.
Fig 6.1 Adjusting belt tension