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the operator. Unless a supply cable is fitted the supply connections are to be made to terminals
mounted inside back of the furnace, accessed by removing the furnace back panel.
The terminals are marked according to the power supply, connect as shown in table 2. The
supply must incorporate an earth (ground).
Table 2. Electrical connections:
Supply
Terminal label
1-phase
Supply
Terminal label
2-phase
3.6.
Voltage Level & Power Limit Settings.
Check the furnace rating label voltage. If the actual supply is not the same as the voltage on the
label, then the controller power limit should be adjusted as follows.
If the actual supply voltage is higher than the voltage on the rating label (or the voltage for
which the furnace was last set), then immediately after switch-on set the temperature setpoint to
zero to prevent heating and drawing excessive current.
Press Page / until
displayed. Press Down q or Up p once to display the value of
write down the original value). To alter the parameter use Down q or Up p.
Correct values for the
200V
79%
See also the section on element ageing – section 5.2.
3.7.
Exhaust Vent Connections.
Note: Significant amounts of carbon monoxide may be exhausted from the
work tube during the use of this furnace. Carbon monoxide is toxic and
inflammable (see section 1.2: Carbon Monoxide Warning.) it is
recommended that the vent tube is routed out of the building. The furnace
must always be positioned as recommended in section 3.4: Positioning The
Furnace.
The furnace has two exhaust vents, the main vent at the back of the heating
chamber and a safety pressure relief vent at the side of the furnace. The purpose of the safety
vent is to prevent dangerous pressure build up as the furnace warms up if the main vent tube
becomes blocked.
The main vent and the safety pressure relief vent must be connected to separate vent runs and
routed out of the building.
With the back panel removed access is gained to the main vent tube fitting situated on the work
tube back seal assembly below the thermocouples. The main vent tube fitting is a 12mm x 3/8"
BSP adapter suitable for connecting 12mm diameter copper tube. See fig 6.
The safety pressure relief vent tube fitting is a 6mm x 1/8" BSP adapter suitable for connecting
6mm copper tube. See fig 11.
MF36
Cable colour
L or L1
Brown or Black
N or L2
Blue or Black
PE
Green/Yellow
Cable colour
L1
Black
L2
Black
N
Light Blue
PE
Green/Yellow
(output list) is displayed. Press Scroll Q until
oP
OP.Hi
parameter, with new elements, are:
208V
74%
Live-Neutral
to live
to neutral
to earth (ground)
to phase 1
to phase 2
to neutral
to earth (ground)
220V/380V
230V/400V
65%
60%
Caf Digital Imaging
Supply type
Reversible or Live-Live
to either power conductor
to the other power conductor
to earth (ground)
OP.Hi
(Output High) is
OP.Hi
(it is good practice to
240V/415V
55%
page 11
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