Servicing, Maintenance And Component Replacement - Buffalo NBB3 Installation And Operating Instructions Manual

De-scaling the boiler at the end of the working day gives the de-scaling agent
several hours to work. Buffalo recommend our own de-scaling agent MS19,
available from our Spares department.
Wear protective clothing.
Isolate the boiler from the electrical supply.
Turn off the power and allow the water to cool to 60 Deg C.
Using a 3mm Allen key, remove the screw in the top of the boiler.
Remove the insulation from the top of the tank. Unscrew and remove the tank lid.
Add the de-scaling agent slowly to avoid eruption of the water, following the
manufacturer's instructions.
Replace tank lid and outer lid and attach an 'Out of Use' notice to prevent use
during de-scaling.
Turn on the electricity and run the boiler normally for 30 minutes. Isolate the boiler
and allow the water to cool.
Remove both outer and tank lids again. Inspect the tank and level sensor housings
for scale deposits. If necessary repeat the de-scaling process.
Drain and flush all de-scaling agent as follows:
Remove the drip tray.
Remove the front panel by unscrewing the two screws behind the drip tray.
Connect a hose from the overflow pipe to a bucket and open the service valve to
drain the water from the tank.
Flush the tank with clean water, shut the valve and replace the front cover.
Replace the drip tray and tank lid, ensuring the gasket is sealing the top of the tank
correctly.
Re-fit the outer lid and turn on the boiler.
SERVICING, MAINTENANCE AND
COMPONENT REPLACEMENT
Other than replacing the filter, all servicing, maintenance and component
replacement on these appliances should be carried out by one of our recommended
service engineers.
IS 619 ECN 3949 Page 8 of 10