eta SH Installation Manual page 28

Minimum clearances for maintenance
Position air valves
Turn both air valves to the closed position.
Replace air valves
Push the air valves, springs and washers onto the
air valve shafts.
Both air valves must be installed in the closed
position on both sides.
Install cotter pins on air valve shafts
Install cotter pins on the air valve shafts so that the
air valves are pressed against the air boxes by the
springs.
The air valves must be completely flush with the air
boxes on both sides of the boiler.
Install actuator brackets
Attach the brackets for the actuators to both air
valves. Fasten each bracket with an M8 long nut
and a self-tapping screw.
Turn both air valve shafts and check their smooth-
ness of movement.
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Installation