IS435 ECN3461
9
MAINTENANCE
Filter: Twist to the left and remove. See section on filter replacement.
Descaling
The descaling procedure must be performed by trained personnel as it requires the
removal of panels from the boiler and access to live electrical components.
The boiler should be descaled regularly to maintain efficient operation and water quality. The
frequency depends on the hardness of the local water and the timely replacement of the filter.
The boiler is best descaled at the end of the working day to allow the descaling agent several
hours to work. Lincat recommends its own descaling agent, available from Lincat spares
department, part code MS19.
1 Wear protective clothing.
2 Isolate the boiler from the electricity supply.
3 Turn off the power and let the water cool to approximately 60ºC to avoid injury.
4 Remove the screw on the top of the boiler and slide off the body.
5 Remove the insulation on top of the tank, then unscrew and remove the tank lid.
6 Add the descaling agent a little at a time as some types can cause hot water to erupt.
Always follow the manufacturer’s instructions.
7 Replace the tank lid and outer body, and attach an “Out of Use” notice to the boiler to
prevent use during descaling.
8 Turn on the electricity and allow the boiler to heat and run normally for approximately 30
minutes.
9 Isolate the boiler and allow the water to cool.
10 Remove the outer body and tank lid and inspect the tank and level sensor housings for
scale deposits. If necessary repeat the descaling process.
11 Drain and flush all descaling agent from the tank completely as follows
i Unscrew the drain plug (Use a 24mm spanner to hold the plug and a 21mm socket on
a ratchet to remove it) from the bottom of the tank to drain all the water out.
