MRF 16/22
42
MF 55-GB 1.21
13 Repairs & replacements
13.1 Safety warning – disconnection from supply
Always ensure that the furnace is disconnected from the supply before repair work is
carried out.
Note: the Instrument switch on the front panel does not isolate the furnace from
the supply.
13.2 Safety note - refractory fibrous insulation
This furnace contains refractory fibres in the thermal insulation boards.
Normal use of the furnace 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, it is strongly recommended that
safety precautions are taken whenever the materials are handled.
Exposure to dust from fibre which 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.
Further information can be printed on request. Alternatively Thermal Engineering Services
can quote for any repairs to be carried out.
13.3 Access panels removal
Always disconnect the electrical supply before removing any access panel.
Top panel
Remove the fastening screws, lift the panel and disconnect the earth lead.
Element access panel
Remove the top panel as described above, remove all the fastening bolts and washers then
lift the panel out. There is no earth lead on this panel.
Left side panel
First remove the fork lift access panel
[see section 3.1]
. Remove the left side panel by
slackening the four fixing screws (behind plastic caps), do not remove the screws. Lift the
panel about 15mm and then pull off to the side. Disconnect the earth lead.
Back panel:
Remove the fastening screws, lift the panel and disconnect the earth lead and fan leads.
