Carbolite CDF 15/1b - Manual (Page 10)

CDF
10
MF56 – 1.03
5.5 Fuse Replacement
Fuses are marked on the circuit diagram (section 7.0) with type codes, e.g. F1, F2. A list of the
correct fuses is given in section 8.1.
If any fuse has failed, it is advisable for an electrician to check the internal circuits.
Replace any failed fuses with the correct type. For safety reasons do not fit larger capacity fuses
without first consulting Carbolite.
The fuses are near the cable entry point, and access is by removal of the back panel.
5.6 Thermocouple Replacement
Disconnect the furnace from the supply, and remove the furnace back panel.
Make a note of the thermocouple connections. The negative leg of the thermocouple is marked
blue. Compensating cable colour codings are:
negative: white positive (type R): orange
Disconnect the thermocouple from its terminal block.
Bend the metal tag, or release the screw, to release the thermocouple sheath; withdraw the sheath,
and shake out any fragments of thermocouple.
Re-assemble with a new thermocouple observing the colour coding, ensuring that the
thermocouple is not twisted as it is being inserted and that sheath is refastened.
5.7 Element Fitting and Replacement
Replacements: read the section on element ageing (4.5).
Disconnect the furnace from the electrical supply and remove the furnace back panel
to gain access to the element connections.
Remember that the elements are fragile and expensive, and that they can be damaged by
contamination: handle them with care and keep them clean.
5.7.1 Fitting Elements
Ensure that there is no packaging or other objects within the chamber.
Fit Hearth tile: Read Section 2.3
Remove rear panel by unscrewing the 6 retaining screws and disconnecting the earth cable.
From the rear of the furnace, visually check the element location holes for any obstructions.
Carefully unpack the 3 elements.
Carefully take an element and align with element locations hole, in the rear of the brickbox
(See photo 1)
Photo 1 Photo 2