Alke 61 Series Gebruikers- en installatiehandleiding - Pagina 5
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Maintenance
The frequency of maintenance is strongly depending on the quality of the combustion air and the intensity of
use. When used in poultry houses, maintenance is advised every 6 weeks or by changing the animals. By use
in clean environment conditions, the maintenance period can be extended, but not longer than 6 months. In
case heaters are not used for a long period, always do maintenance first before using them again.
In case the heaters need to be stored for a long time, make sure that no dust, spiders, etc. can enter the heater.
Use the carton packaging box to store the heater, or a plastic bag if the box is not available anymore, and close
this carefully.
Parts that are broken, or are not functioning well, must be replaced directly by identical ones of same brand and
type. Consult the dealer or manufacturer in case of doubt.
Daily maintenance
In dusty or dirty environments check and clean a heater every day with a soft brush. Specially pay attention that
the venturi (8) (or venturi tube if no venturi is needed) remains clean. In case a heater is not cleaned internally
the heat efficiency will drop and the lifetime of the burner will become shorter. Also there is a possibility that
carbon monoxide (poisonous) will be produced and soot deposit will occur. To keep the heater free of dust is
important. Check also the condition of the gas hose daily for damage, cracks, ageing, etc.
Dust filter
Sequence of periodic maintenance
Warning: Wear safety goggles during cleaning with compressed air.
Warning: Never use water to clean the heater or ceramic stones internally.
First clean the heater and filter (11) as described by daily maintenance.
Clean the reflector and other external parts with water, a mild detergent and a cloth or soft brush.
Carefully inspect the ceramic stones on damage, cracks and holes. Replace when needed.
To clean the burner (5), burner gauze (2) and ceramic stone (22) use an air hose (pressure max 2 bar/30
psi) and blow inside the venturi (8) and on the ceramic stone (22). Do this for 60 seconds and repeat 2-3
times. Never use water to clean your heater or any steel brush
Check the injector for obstructions. Remove obstructions by brushing them away and by using a pin or drill
to clean the injector hole. Make sure that the injector hole does not become wider by using a pin or drill that
is larger than the size stamped on the side of the injector.
Clean the inside of the gas safety device and injector with compressed air. Make sure that the pressure of
the compressed air is not more than the 1,5x the gas pressure mentioned on the data plate (20 till 1400
mbar). Otherwise the rubber seals inside the safety device will become damaged.
Check the condition of the thermocouple sensor. Replace in case the tip is burnt-in already, or the copper
tube is kinked, to avoid unnecessary shut down later on.
Check all gas carrying parts and connections for gas tightness with leak detection liquid or soapy water
according the procedure in the standards applicable in the local installation situation. Never use a flame for
soundness checks!
In case a gas hose and/or gas regulator is used, check these carefully for cracks, wear and other signs of
damage or alteration. Replace it when the maximum lifetime printed on the hose and/or gas regulator (or
the maximum allowed by local requirements) has been passed.
Commission the heater after maintenance and check it carefully during first ignition, firing and extinguishing.
Version: jan 2011
Dust filters must be check every day and cleaned in case needed.
Remove a filter before cleaning. Dry dust can be removed by tapping the
filter softly against a solid surface, like the sole of a shoe. The dust will
fall off easy now. In case the filter is still not clean, brush the surface
gently with a brush or clean it with compressed air from inside to the
outside. In case the dust is greasy, clean the filter in warm water with a
bit detergent. Make sure that filters are dry before placing them back.
Even with the use of a filter still check the heater regularly inside while
very fine dust still will pass the filter and pollute the heater internally.
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Manual number: 0009 0520EN