Element Connections - 5 Elements
8.9
Insulation Replacement
See section 8.2 - wearing a face mask is required.
After any replacement of insulation material, run the furnace at 1500 -°C to burn off
volatile matter. Do this in a well ventilated area. Try to ensure that there is some
chamber ventilation, but not too much as this could result in cracked insulation.
8.10
Transformer Tappings
A change of transformer tapping is required if the electrical supply voltage differs from
the present setting.
To access the transformer tappings, first disconnect the furnace from the electrical
supply and then remove the left-hand side cover (see section 8.3). Positions below are
given from a viewing position at the left end of the furnace.
On the left side are the secondary tappings, which should not require change, but can
be checked against the following data:
HTF 17/5
27 V
HTF 17/10
38 V
HTF 18/4
31.1 V
HTF 18/8
43.8 V
On the right side is a terminal strip with the following connections (208 to 240 V version
shown).
57
8.0 Repairs and Replacements
Summary of Contents for CARBOLITE GERO HTF 18/4
Page 7: ...Caution Double Pole Neutral Fusing 7 1 0 Symbols and Warnings ...
Page 37: ...Power Limit View 37 4 0 3508 Dual Loop Cascade ...
Page 59: ...59 8 0 Repairs and Replacements ...
Page 63: ...GR Y Green Yellow 63 10 0 Wiring Diagrams ...
Page 67: ...Notes Service Record Engineer Name Date Record of Work ...
