Carbolite GVC Series - Manual (Page 20)

G range
20 MF48 -1.18
8.2 Power Settings & Adjustment
The furnace control system incorporates electronic power limiting. The power limit parameter
OP.Hi is accessible to the operator, and can be used to match the furnace to the actual supply
voltage.
All standard models covered by this manual are fitted with 208V elements and are designed for
use over the range of voltages 200V-240V; the power limit parameter is set accordingly. These
models may be relocated to a different voltage within the range
The power limit depends on the voltage s follows.
200V 208V 220V, 380V 230V, 400V 240V, 415V 254V, 440V 277V, 480V
100 100 89 82 75 67 56
Non-standard models
Special versions (i.e. with non-standard heating elements) may not follow the table above. Check
the initial setting (see below) or contact Carbolite if in doubt.
Power Adjustment
Set the Heater Switch to Off to prevent heating while adjusting the power limit.
Press Page  until oP (output list) is displayed. Press Scroll  until OP.Hi (Output High) is
displayed. Press Down  or Up  once to display the value of OP.Hi (it is good practice to write
down the original value). To alter the parameter to the desired value use Down  or Up .
A power setting of zero prevents the furnace from heating: useful for demonstrating the controls
without taking power.
Do not increase the power limit simply “to get more power”. The elements could burn out, or a
fuse could blow.