Carbolite CWF Installation, Operation & Maintenance Instructions Manual page 10

CWF, BWF, RWF
5.7 RWF Element Replacement
See section 5.2- wearing a face mask is recommended.
The special RWF heating elements form the chamber sides, base and roof in a single module. The
element is fragile, so spare elements are supplied complete in an insulation box to avoid damage.
Disconnect the furnace, remove the back panel, make a plan and disconnect the lead, as for CWF,
section 5.6 above.
Remove the thermocouple(s) and support tube(s).
Using a socket spanner undo the four bolts that fasten the insulation box. These are located under
the insulation box in the two cross supports.
Remove the insulation box by carefully sliding it out through the back of the furnace case.
Carefully slide in the new insulation box, and fasten the four bolts. DO NOT support the element
by putting your hand inside the chamber - the element is fragile.
As necessary, shorten the element tails .... (etc., as for CWF, section 5.6).
5.8 Door Plug Replacement
Lift the furnace door to the open position and remove the door cover from the plug carrier
assembly.
Remove the old door plug by sliding it upwards out of its carrier.
Slide the new plug into the carrier assembly making sure that the plug is the correct way up.
Refit the door cover.
When first heating the furnace after a replacement, ensure that the ventilation is good: emission of
some fumes may be expected.
5.9 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. Depending on model and voltage, the different fuse types may
or may not be fitted.
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.
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Remember to make a plan of the connections.
MF02