ONHW26NG60 User Manual

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Page36

Version1.0Aug2018

CleaningandMaintenance

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Caution:Priortocleaningormaintenance,alwaysdisconnectthepowersupply.

Regularcleaningandmaintenancewillhelptomakesurethewaterheaterisalwaysingoodcondition&prolongthe

working‐lifeofthewaterheater. 

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1) CleaningofHotWaterHeater 

Ensuretheheaterhasnotbeeninoperationforatleast1hourandthecasingisnothot.Useavacuumcleanerto

cleanaroundthewaterheatertoremoveanydust,dirt,and/orlintbuildup,particularlyneartheairintakeorvent

outlet–seeFigure34.Useadampclothtocleanthehotwaterheatercasing.Drythesurfaceafterwards.Neveruse

grittyorabrasivesponges.Acidicmaterialslikevinegarandcitricjuicesetccandamagethemostresistantsurfaces. 

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Check the air intake and ventoutlet forblockage and / or debris. The air intake requires a minimum of 300mm

clearancebetweentheairintakeopeningandanyobstruction–seeFigure37.

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2) Strainer

Cleanthebuilt‐instraineronamonthlybasistopreventarestrictiontohotwaterflow.Turnoffthewaterheater

anddisconnectthepowerleadfromtheoutlet.Closethecoldwaterservicevalvetoterminatethewatersupplyto

thewaterheater–seeFigure38.

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Figure 34

Figure 35

Figure 38

Figure 36

Figure 37

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User Manual - Page 37