Keison CARBOLITE AAF 11/18, Installation, Operation & Maintenance Instructions Manual

AAF, OAF, GSM, VMF 

M

AINTENANCE

4.1  General Maintenance 

No routine maintenance is required other than removal of soot deposits mentioned in 3.3 and the 
occasional replacement of consumable items. 

The furnace outer surface may be cleaned with a damp cloth. Do not allow water to enter the 
interior of the case or chamber. Do not clean with organic solvents. 

4.2 

Calibration 

After prolonged use the controller and/or thermocouple could require recalibration. This would be 
important for processes which require accurate temperature readings or which use the furnace 
close to its maximum temperature. A quick check using an independent thermocouple and 
temperature indicator should be made from time to time to determine whether full calibration is 
required. Carbolite can supply these items. 

Depending on the controller, the controller manual may contain calibration instructions. 

4.3  After Sales Service 

Carbolite’s service division (Thermal Engineering Services) has a team of Service Engineers 
capable of repair, calibration and preventive maintenance of furnace and oven products at our 
customers’ premises throughout the world. We also sell spares by mail order. A telephone call or 
fax often enables a fault to be diagnosed and the necessary spare part despatched.  

Each furnace has its own record card at Carbolite. In all correspondence please quote the serial 
number, model type and voltage given on the rating label of the furnace. The serial number and 
model type are also given on the front of this booklet when supplied with a furnace. 

To contact Thermal Engineering Services or Carbolite see the back page of this manual. 

4.4 

Recommended Spares Kits 

Carbolite can supply individual spares, or a kit of the items most likely to be required. Ordering a 
kit in advance can save time in the event of a breakdown. Each kit comprises one thermocouple 
(OAF 11/2: 1 set), one sheath, one solid state relay, one door insulation piece, and one element or 
set of elements. Individual spares are also available. 

When ordering spares please quote the model details as requested above. 

4.5  Power Adjustment 

The furnace control system incorporates electronic power limiting, which is used in some models 
to compensate for voltage to achieve the same power over a range of voltage supplies. In other 
models the power limit is set to 100% over all common voltages. The power limit parameter 

OP.Hi

may be accessible to the operator, but should not generally be altered. 

See section 8.2 for details of power limit settings. DO NOT adjust the power to a level higher that 
the design level stated: this may cause fuse to blow, and could damage the heating elements. 

Occasionally the power limit is set to zero to permit demonstration of the controls without the 
heating elements taking power. To resume heating the power limit should be reset to its standard 
value. 

5.0 

MF06 

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