Carbolite AX120 - Manual (Page 8)

Apex Series Ovens
8
MF42 1.10
4.5 Retrofit Kits
Kits for process timer, overtemperature (hydraulic thermostat) and locking handle are available.
Instructions for fitting these are supplied with the kits (MS14).
5.0 R EPAIRS & R EPLACEMENTS
5.1 Safety Warning – Disconnection from Supply
Always ensure that the oven is disconnected from the supply before repair work is
carried out.
5.2 Safety Warning - Refractory Fibrous Insulation
This oven contains refractory fibres in its thermal insulation. These materials may
be in the form of fibre blanket or felt, vacuum formed board or shapes, mineral
wool slab or loose fill fibre.
Normal use of the oven does not result in any significant level of airborne dust from these
materials, but much higher levels may be encountered during maintenance or repair.
Whilst there is no evidence of any long term health hazards, we strongly recommend that safety
precautions are taken whenever the materials are handled.
Exposure to dust from fibre that has been used at high temperatures may cause
respiratory disease.
When handling fibre always use an approved mask, eye protection, gloves and long
sleeved clothing.
Avoid breaking up waste material. Dispose of waste fibre in sealed containers.
After handling rinse exposed skin with water before washing gently with soap (not
detergent). Wash work clothing separately.
Before commencing any major repairs we recommend reference to the European Ceramic Fibre
Industry Association Bulletin No. 11 and the UK Health and Safety Executive Guidance Note
EH46.
We can provide further information on request. Alternatively our service division can quote for
any repairs to be carried out at your premises or ours.
5.3 Panel Removal
Disconnect the oven from the electrical supply.
Side Cover. The complete right-hand side cover may be removed. Remove the screws at the back
that fasten the side cover to the rest of the casing. Push the section backwards a few mm only, then
ease it sideways (to the right) off the main case. Disconnect the earth (ground) wire.
When reassembling take time and care in locating the tabs on the right of the front control panel
into the matching slots in the side cover. Remember to reconnect the earth wire.
Internal Element Cover. Open the door. Slacken the screw holding the internal side cover. Pull the
cover forward a few mm and lift it off to the left.
5.4 Temperature Controller or Process Timer Replacement
Disconnect the oven from the supply and remove the side cover (see 5.3).
Make a note of all the wiring connections and disconnect the wires.
Loosen the screw that holds the controller body clamp in place. Use a flat screwdriver or similar
object to ease apart the two plastic lugs on the side of the clamp, and pull the instrument forward
out of the front control panel.
Reconnect the wires according to the notes made – or see section 7.0 for wiring details.