Carbolite CF 15 - CF 60 User Manual download pdf (Page 5)

MF28 3.08 5

2.6 Electrical Connections

Connection by a qualified electrician is recommended.

Cupellation models have three internal circuits and are normally supplied for three phase use. A

three phase supply may be either star or delta, but the furnace must only be connected to the type

and voltage of supply for which it was made. If the furnace is ordered for a single phase supply,

this may be Live to Neutral reversible or non-reversible, or Live to Live.

Check the furnace rating label before connection. The supply voltage should agree with the voltage

on the label, and the supply capacity should be sufficient for the amperage on the label.

The supply should be fused at the next size equal to or higher than the amperage on the label. A

table of the most common fuse ratings is also given in section 8.1 of this manual. Where a supply

cable is present there are internal supply fuses; in this case customer fusing is preferred but not

essential.

Furnace with supply cable: either wire directly to an isolator or fit with a line plug.

Furnace without supply cable: a permanent connection to a fused and isolated supply should be

made to the internal terminals after temporary removal of the furnace back panel.

Connection by line plug: the plug should be within reach of the operator, and should be quickly

removable.

Connection to isolating switch: this should operate on both conductors (single phase) or on all live

conductors (three phase), and should be within reach of the operator.

The supply MUST incorporate an earth (ground).

CONNECTION DETAILS

supply type

Supply

Terminal label

Cable colour

Live-Neutral

Reversible or Live-Live

1-phase

Brown

To live

to either power conductor

Blue

To neutral

to the other power conductor

Green/Yellow

To earth (ground)

to earth (ground)

supply

Terminal label

Cable colour

3-phase

Black

to phase 1

Black

to phase 2

Black

to phase 3

Light Blue

to neutral except delta

Green/Yellow

to earth (ground)

Technical Note

The furnaces covered by this manual have electronically controlled power limits. Do not attempt to

calculate the Amps from the Wattage. High break capacity fuses should be used. Avoid fast-blow

fuses and magnetic trip circuit breakers - consult Carbolite if in doubt.

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Carbolite CF 15 - CF 60 User Manual Page 5

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