Buffalo GH187 - Page 11

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. Always use
a descaling agent suitable for stainless steel. Please note any relevant Personal Protec-
tive Equipment must be worn when undertaking any descaling.
1. Isolate the boiler from electrical supply.
2. Allow the water to cool to approximately 60
o
C
3. Remove the screw from the back of the boiler and remove the top cover.
(PICTURE 1 & 2)
4. Remove the insulation on top of the tank, unscrew and reposition the tank lid.
(PICTURE 3, 4 & 5)
5. Add descaling agent in accordance with manufactures instructions. (PICTURE 5)
6. Replace the tank lid/insulation and top cover.
7. Turn on the electricity and allow the boiler to operate normally for approximately
45 minutes.
8. Isolate the boiler and allow to cool down.
9. Remove the tank lid again, to inspect the tank and level detectors for scale depos-
its.
10. Drainandushthedescalingagentfromthetank,usingtaponthefrontofthe
appliance.
11. To drain the tank completely, remove the front panel by removing 2 screws behind
the drip tray and lifting the panel up, over the tap. (PICTURE 6, 7 & 8)
12. Position a bucket in front of the product and open the service valve to drain the
waterfromthetank(PICTURE9)
13. When empty, close the valve and replace front panel.
14. Replace tank lid, ensuring the gasket is sealing the top of the tank correctly.
15. Fit top cover and turn on the boiler.
In hard water areas where a large build-up of scale has formed, you may need to
physically scrape from the tank. If this is required, ensure care is taken and not to
damage the level sensor probes.
FAILURE TO DESCALE ON A REGULAR BASIS WILL INVALIDATE YOUR
WARRANTY