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Replacement of actuator and ETR
Removing ETR
• Undo the 2 self-tapping screws with a No. 1 Pozi drive
screwdriver and remove the ETR from the hole. Con-
tinuing to undo the 2 screws allows separation of the
two pieces of the ETR. Replace old ETR with new (see
below).
Removing actuator fasteners
• With power removed and the damper in the closed
position wind the actuator anticlockwise 2-3 turns
using the 5mm Allen key provided and activate the
locking mechanism.
• Unscrew and remove the two bolts holding the actua-
tor to the bracket using a 5mm. Allen key. Unscrew
and remove the bolt and washer holding the actuator
to the shaft using an 8mm A/F spanner.
Checking damper blade starting position
• Damper blade in closed position for the 'Fail-Safe-
Closed' This is also a good opportunity to check the
condition of the white seal around the circumference
of the blade for any damage.
Pretensioning
Pretensioning the damper to ensure full closure. The
damper blade is designed to be pretensioned with the
actuator fitted.
LNNN00356 (5.4)
Actionair CSS Installation Guide
Actuator Orientation
• The actuator can be fitted in one of three different
positions depending on your preference. Now is the
time to decide.
• If different from position supplied 2 M6 nuts (by
others) will be required prior to changing.
Actuator Fitting
• Manually wind actuator clockwise to align the 2 fixing
screw holes (see image right)and ½ turn anti-clockwise
quickly to lock it for fail safe closed position.
• Screw fix actuator to bracket. Fit screw supplied with
actuator through mudguard washer and into the drive
shaft.
• Tighten screw into the shaft on the actuator end, 5Nm.
Max, torque.
• Fully reset and release actuator by manually winding
to fully open and then releasing, noting blade contacts
both 'blade stop' positions using manual reset key
(5mm cranked Allen key) supplied with actuator.
Fit new ETR or replace ETR thermal probe
• For damper sizes greater than Ø100mm. fit the ETR
into the pre-punched hole in the circular case using
a No.1 Pozi drive screwdriver to tighten the two self-
tapping screws supplied with the ETR.
• For damper size Ø100mm. Fit to pre-punched hole in
the side of actuator bracket and through a grommet in
case beneath. Tighten using a No.1 Pozi drive screw-
driver to tighten the two self-tapping screws supplied
with the ETR. NOTE fully tighten the ETR so that its
two-part case is completely together to ensure electri-
cal continuity inside.
Electrical Connection and Final
Operational Test
• When power is available, the unit must be checked for
electrical operation. Power on to motor open, power
off to spring close (fail-safe-closed). The unit must also
be checked by pushing and holding the test switch
on the ETR to confirm that the damper closes. When
pressure is removed from the switch the damper will
re-open. This may be done after the initial installation
test, to provide periodic operation of the damper to
simulate actual fail-safe closure under fire conditions.
• Note: Application of supply voltage will automatically
override the manual locking mechanism.
20220627
Swegon reserves the right to alter specifications.
7
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