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9
40. Heating system
Service
manual
40
Replacing actuator
continued
7. See closed and open damper, fig. 4 and
5.
8. Mount the wires in screw terminals B.
Too long drying time
The actuator on a steam calorifer pulls via
a shaft a damper which opens/closes the
air inlet to the drum.
It is important that the actuator is firmly
fastened on the shaft,
this is done by
locking the shaft extra tight to the actuator.
1. Unscrew one of the two hexagon head
screws in order to mark the positioning on
the shaft, the other screw must clamp the
shaft, while the marking is done. Repeat
this with screw no. 2.
2. Dismount actuator.
3. Drill a groove in the two marked spots.
This way the two screws are locked tighter
to the shaft when they are tightened.
4. Mount the actuator and tighten the 2
hexagon head screws with 5Nm.
(Note! It is a 1/8” key, not mm key)
Function check
Test the dryer, see section 11: Function
check.
4
Damper
closed
Actuator
Actuator
Damper
open
5
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