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MAINTENANCE AND USE MANUAL
furnace DM
EN
The switched-on aspirator (optional) starts/stops automatically during oven operation /
shutdown. The operator can, nevertheless, program aspirator shutdown temperature during Data
Programming (see section 7.3.1 point I).
In fact, once the third parameter (holding time) of
PHASE 5
has been entered press
ENTER
(
28
) to
save the data that will then be set.
The display (
11
) shows “
FAn
”
300
.
The figure “
300
” indicates the temperature (in °C) at which the fan automatically stops working.
This data is entered by technicians at
Zhermack S.p.A.
during final oven testing. Should the
operator so desire, he/she may vary this setting between a minimum of 0°C and a maximum of
700°C.
As a guideline, this setting should not be any higher than 400°C because, while air flow from the
melting chamber is only minimal, it is good practice to prevent withdrawal of heat as this delays
attainment of high temperatures.
7.4
USING THE ASPIRATION UNIT
Programming of the fan shutdown temperature is only effected, of course,
where the oven has an aspirating flue.
As regards aspirator positioning and connection, observe the instructions in
sections 6.3 and 6.4.1. carefully.
7.4.1
Routine mode
To fire fast linings the suction unit needs to be set up in a special way.
When setting the program, after setting the 5 firing phases, the word “
Fan
” appears on the
display followed by 4 zeros. If, in this phase, a temperature higher than
700°C
is set the word
“
Fast
” appears on the display to indicate operation of suction unit with fast linings. During
execution of the program, when the set temperature is reached and the material is inserted in
the oven, closing the door automatically activates the suction unit for about 30 minutes so as
eliminate any fumes that develop in the chamber.
The set temperature will nevertheless be guaranteed.
7.4.2
“Fast” mode
Delayed oven start must be programmed after the melting program has been set (see section
7.3).
A.
With the oven
OFF
, press
START-STOP
(
20
). The word “
tImE
” appears on the display (
11
).
7.5
DELAYED START
The extraction fan comes on at the beginning of phase 2 and goes off when the power supply
to the oven is cut.
7.4.3
EXTRACTION FAN