17
4.4 Removing the furnace head
Before the hood (36) is removed, the furnace has
to be switched off and the power cord (16)
disconnected from the power socket (17).
1. Loosen and remove the knurled screw (37) of
the hood (36)
2. Remove the hood (36)
3. Disconnect the thermocouple plug (26)
4. Disconnect the heater plug (28)
5. Press the leaf spring (32) with a finger, lift off
the furnace head at the same time and
remove it
Make sure the furnace head has
completely cooled down before it is
removed (fire hazard).
4.5 Initial start-up
1. Connect the power cord (16) with the wall
socket.
2. Put the On/Off switch (11) at the rear of the
furnace on position “I”.
The furnace will now automatically conduct a self-
test. The performance of all furnace components is
automatically checked. The display shows the
following indications during the self-test:
1 Status bar
2 Firing hours
3 SW version
4 Current supply voltage
If any component is defective, the corresponding
error number (ER xxx) will be indicated in the dis-
play. If all components work properly, the display
shows the stand-by mode.
Stand-by mode
The stand-by mode is indicated after the self-test.
The furnace is set to the last used program.
90 Program number
91 Current temperature
92 Temperature increase
93 Holding temperature
3
2
4
1
90
92
93
91
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