Carbolite BLF 18/21 - Manual (Page 4)

BLF
4
MF23 – 3.11
Connect the aluminium braids securely as indicated in the element installation instructions.
2.4 Electrical Connections
Connection by a qualified electrician is recommended.
The 3 litre models are designed for single phase electrical supplies with or without neutral. Larger
models are designed for 3-phase use.
The voltage or range of voltages on which the furnace may be operated is given on the furnace
rating label. Check that the supply voltage is compatible with the voltage on the label, and that the
current capacity is sufficient for the amperage on the label, before connection to the supply. A
table of the most common ratings is given in section 8.5 of this manual.
Supply cables may be fitted to special order; when fitted, supply-rated fuses are internally fitted,
and the cable may be directly wired to an isolator or fitted with a line plug. Where no supply cable
is fitted there are no internal supply-rated fuses, and a permanent connection should be made from
a fused and isolated supply to the internal terminals after temporary removal of the furnace back
panel.
The supply point must be within reach of the furnace operator and must incorporate either an
isolating switch which operates on both conductors (single phase) or on all live conductors
(two/three phase), or a quickly removable plug.
The supply MUST incorporate an earth (ground).
CONNECTION DETAILS supply type
Supply Terminal label Cable colour Live-Neutral Reversible or Live-Live
1-phase L Brown To live to either power conductor
N Blue To neutral to the other power conductor
PE Green/Yellow To earth (ground) to earth (ground)
supply Terminal label Cable colour
3-phase L1 Black to phase 1
L2 Black to phase 2
L3 Black to phase 3
N Light Blue to neutral except delta
PE Green/Yellow to earth (ground)
DO NOT connect a furnace ordered for three phase use to a single phase supply or to the wrong
type of three phase supply.