Operating Instructions and Installation Instructions
MaintenanceManual
5353
GB
2.3 Servicing by a qualied professional
Theprocedurefordescalingthewaterheaterisasfollows:
1.Cuttheappliance’spowersupply.
2.Loosenthescrewsandremovethecover.
3.Disconnectthepowercablefromtheterminalsonthethermostatthentheearth
wireconnectedtothetank.
4.Disconnecttheheatingelement’sconnectoronthepowerboard.
5.Disconnecttheredwire’sconnectorandunscrewthebluewire’sterminal.
6.Uncliptheboardholderby:
-tippingitforwardsforaverticalwall-mountedmodel
-unclippingitfromthenotchesofthecoveringforaverticalonpedestalor
horizontalwall-mountedmodel
Earth
wire
Power cable
Red wire's
connector
Connector
Blue wire's
terminal
Power
cable
Earth wire
Connector
Red wire's
connector
Vertical wall-mounted
Vertical on pedestal /
Horizontal wall-moun-
ted










