2002 by ELTRA GmbH Germany – January 2002 – Service Manual OH 900 / ON 900 / ONH 2000
3.13-1
3.13
3.13
Cleaning the solenoid valves
Only with the 2/2 valve
Turn the power switch to pos. 1, or best ( safest ) to pos. 0,
You can unplug the power plug as well
Remove the connector ( 7 )
Unscrew the nut ( 1 )
Remove the coil ( 2 ) ( only with the 2/2 valve )
Unscrew (counter-clockwise) the hexagon screw on the armature housing.
Remove the armature ( 5 ) ( only with the 2/2 valve )
Careful
!
Do not lose the spring ( 4 )
With oxygen pressure or compressed air, clean the inside of the armature housing
( 3 ), as well as the armature ( 5 ) and re-assemble the solenoid valve.
With the furnace closed and renewed oxygen pressure, check to ensure that the
solenoid valve is sealed, see
3. 7
.
2
3
5
6
7
1
3-13
4
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