ELTRA ONH-2000 - 3.17 Furnace Pneumatics Safety Features

 2002 by ELTRA GmbH Germany – January 2002 – Service Manual OH 900 / ON 900 / ONH 2000
3.17-1
3.17 3.17 Additional safety features for furnace pneumatics (optional)
This is the standard pneumatics for the furnace piston drive.
A more controlled upward movement of the furnace piston is obtained this way:
When upgrading the standard pneumatics with the magnetic switch ( 9 ), the solenoid
valve ( 10 ), and the pressure regulator ( 11 ), the furnace piston will go up with a very low
pressure ( no danger ), and finally it will close at full pressure.
3
4
2
+24V
red
0V
1
11380
11440
6
5
9
7
11492
12
11
10
0.2bar-3psi
original cable
The O ring
remains connected
blue
3-16-2
3
4
2
1
11380
6
5
7
3-16-4