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MP909D PNEUMATIC DAMPER OPERATOR
Clevis Type Linkage
Attach linkage to clevis (see Fig. 4 and 5).
TYPICALLY PROVIDED BY USER
M16440
Fig. 4. Clevis linkage.
CRANKARM
R
Crankarm Radius (R) in in. (mm)
Angle
(φ)
2.3 in. (58 mm) Stroke
30
4-1/2 (114)
45
3-1/8 (79)
60
2-3/8 (60)
90
1-11/16 (43)
Fig. 5. MP909D Operator typical linkage application.
Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis, MN 55408-0524
95-7175EF
B.B. 8-00
1/2
0
M16441
3 in. (76 mm) Stroke
5-3/4 (146)
3-7/8 (98)
3 (76)
2-1/16 (52)
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 3N7
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
TYPICAL OPERATION (FIG. 6)
When used to operate a small outside air damper on a fan coil
unit, the MP909D is controlled by an electric/pneumatic relay.
When the fan starts, the normally closed damper opens; when
the fan stops, the damper closes.
E/P RELAY
OUTSIDE
AIR
MP909D
Fig. 6. Typical Operation of the MP909D Operator.
TO FAN
M
FAN COIL
UNIT
CEILING
RETURN
M16442
AIR
www.honeywell.com
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