Install Instructions
MP909E,H PNEUMATIC DAMPER ACTUATORS
Internal Mounting
NORMALLY CLOSED MOUNTING
1.
See Fig. 11 for internal mounting normally closed
dimensions.
2.
Check faceplate position and adjust if necessary
(Fig. 12). The faceplate must be parallel to the back of
the mounting bracket.
3.
Use 1/5 in. Allen wrench to loosen mounting setscrews
on damper mounting clamp one turn (Fig. 12).
4.
Remove and discard shipping stop.
5.
Loosen faceplate nut between mounting bracket and
truss link. Remove clevis pin from actuator pushrod.
6.
Find factory-installed drive ear on damper blade
(mounted per Damper Ordering Instructions).
NOTE: Mount actuator in this position
only
.
7.
Set actuator in place by hooking damper mounting
clamp over bottom edge of damper.
8.
Set damper to its normal (closed) position.
EDGE OF
DAMPER
1
9.
Reinsert clevis pin through drive ear and actuator push-
rod.
10.
Connect truss link to damper with mounting screw and
tighten faceplate nuts.
11.
Tighten damper mounting clamp.
12.
Go to Piping section.
TORQUE BOLTS TO MORE THAN
90 LB-IN. BUT LESS THAN 200 LB-IN.
TIGHTEN BOTH BOLTS (WITH 7/16
BOX END WRENCH).
TIGHTEN EACH BOLT AGAIN TO THE
REQUIRED TORQUE.
1.
2.
3.
M16497
CRANK ARM BOLTS
Fig. 10. Crankarm Bolt Tightening.
3/8 (10)
CLEARANCE
1
8-1/2
(216)
MP909E,H
19-3/4 (502)
M17467
17 (432)
6-3/8
(162)
3/8 (10)
CLEARANCE
DOTTED LINES APPLY TO MP909H ONLY.
Fig. 11. Internal Mounting Normally Closed Dimensions in in. (mm).
Fig. 12. Internal Mounting Normally Open Faceplate.
MOUNTING
CLAMP
BACK
EDGE
SHIPPING
STOP
SETSCREWS
CLEVIS
PIN
TRUSS LINK
FACEPLATE
M16499
1
1
POSITION PARALLEL TO MOUNTING BRACKET BACK EDGE.
CLEVIS PINS,
WASHERS,
AND CLIPS
NORMALLY OPEN MOUNTING
1.
See Fig. 13 for internal mounting normally open
dimensions.
2.
Ensure faceplate position matches Fig. 14.
NOTE: The faceplate must be parallel to the back of
the mounting bracket.
3.
Use 1/8 in. Allen wrench to loosen mounting setscrews
on damper mounting clamp one turn (Fig. 14).
4.
Remove and discard shipping stop.
5.
Determine height of damper drive blade. Dampers with
10 (254), 12 (309), 18 (457), 26 (660), 34 (864), and 48
in. (1219 mm) height have 8 in. (203 mm) drive blades.
All others have 6 in. (152 mm) drive blades.
NOTE: For installation with 6 in. (152 mm) drive
blades skip to Step 7.
5 95-7366—2