2-phase L1
Black
to phase 1
L2
Black
to phase 2
N
Light Blue
to neutral
PE
Green/ Yellow
to earth (ground)
2.5
Power Supply Notes
Each model is manufactured for one of the following voltage ranges:
l
208 V
l
220 to 240 V
l
380 to 415 V (not HTF 17/5 or HTF 18/4)
It is not possible to modify and use a furnace manufactured for the 380-415 range on
either of the other two voltage ranges listed above: there are too many component
differences.
It is possible to modify a furnace manufactured for either 208 and 220-240, provided
the thyristor unit is replaced. A transformer tapping must also be altered. See sections
8.4 and 8.10.
It is possible to alter the voltage within any of the ranges above, by reconnecting the
incoming cable to the transformer to the appropriate primary tapping. The tappings are
208 - 220 - 230 - 240 V, or 380 - 400 - 415 V, and are labelled on the primary side of
the transformer - see section 8.10. It is also necessary to adjust the setting of the
thyristor stack: see section 8.4.
Examples:
l
to alter a furnace made for a 240 V supply to 208 V: replace thyristor stack,
move a cable to the 208 V transformer tapping, and adjust the thyristor stack.
l
to change from a supply of 220 V to 230 V: move a cable to the 230 V, and
adjust the thyristor stack.
Please contract Carbolite Gero Service for guidance and assistance if the power supply
shown on the rating label does not match the power supply available.
11
2.0 Installation
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 ...
