Before Installation - Honeywell MP920B Instructions D'installation

MP920B PNEUMATIC DAMPER ACTUATOR

BEFORE INSTALLATION

Since inlet vane actuator mounting varies among
manufacturers and among fan sizes of a given manufacturer,
many mounting possibilities are available. All mounting
options provide pivoting action in at least one plane. Full
swivel mounting is available when mounting from the air end.
Several choices are available for connecting the actuator shaft
to the inlet vane crankarm. Select bag assemblies appropriate
to job requirements. It is recommended that all inlet vane
actuation applications use a positioner with a 10 psi (69 kPa)
feedback spring.
INSTALLATION
The actuator can have either fixed or swivel mounting from
shaft or air end. See Fig. 5 for optional mounting abilities with
the standard hardware.
NOTES:
– The Operator must be free to pivot in at least one
plane.
– For shaft extension, use 6 in. (152 mm) maximum
3/8-16 UNC steel threaded rod or, for heavier
applications, use one 36 in. (914 mm) maximum
5/8-11 UNC steel threaded rod.
Selection
1. Determine required inlet vane crank arm radius. See
Fig. 3.
2. With vanes in normal (closed) position, determine shaft
or air end mounting location.
3. Determine mounting bracket assembly.
See Table 1 and Fig. 5.
4. Determine connecting linkage bag assembly.
See Table 1 and Fig. 5.
APPROXIMATE AVAILABLE
ROTATION
TORQUE
ANGLE RADIUS "r"
in-lb (Nm)
DEGREES IN. (MM)
90 4-1/4 (108) 894 (101)
85 4-1/2 (114) 976 (110)
80 4-3/4 (121) 1065 (120)
75 5 (127) 1165 (132)
70 5-1/4 (133) 1277 (144)
65 5-1/2 (140) 1403 (159)
60 6 (152) 1548 (175)
55 6-1/2 (165) 1717 (194)
50 7 (178) 1917 (217)
Fig. 3. Inlet vane crank arm rotation versus radius
for a 6 in. (152 mm) actuator stroke.
95-6063EF
OPEN
6 IN. (152 MM)
STROKE
CRANKARM
ROTATION
DRIVE
SHAFT
CLOSED
CRANKARM
OPERATOR
SHAFT
ACTUATOR
MOTION
M18825
2
Table 1. Mounting and Connecting Linkage Combinations.
Mounting Mounting Device
Air end One 14004062-001 Mounting Bracket,
(single plane one 14004241-002 Clevis Pin Kit, and
motion) one AK3558 Swivel Bracket
Fig. 6 and 7
One AK3556 Pipe Mounting
Air end One 14004062-001 Mounting Bracket,
(full swivel one 14004241-002 Clevis Pin Kit, and
motion) two AK3558 Swivel Brackets
Fig. 8 and 9
One AK3556 Pipe Mounting
and one AK3558 Swivel Bracket
Shaft end 14004062-001 Mounting Bracket, one
Fig. 10 14004241-002 Clevis Pin Kit, and one
AK3558 Swivel Bracket
a
Use with or without pipe clamps.
Assembly
Fig. 6 through 9 show assembly sequences for air end
mounting with either single plane motion or full swivel motion.
Fig. 10 covers the shaft end mounting sequences.
To help make the spring adjustment measurement easier, a
tool can be made from a piece of No. 12 or 14 AWG wire. See
Fig. 4 for dimensions.
NOTE: The bend radius is not critical but should be smooth
and quite small so the measurements are the same
as using the feedback spring.
Make the spring adjustment measurement as follows:
1. Hook the tool to the positioner and twist the same as the
feedback spring.
2. Twist until the scribed marks line up with the hole in the
feedback lever.
3. Remove the tool.
4. Hook the spring to both the positioner and the feedback
lever.
BEND END
10-5/8 (270)
Fig. 4. Tool for spring adjustment measurement.
Dimensions in in. (mm).
Connecting
Linkage
AK3557 Clevis
or
AK3559 Heavy Duty
Clevis (use with or
a
without coupling)
or
AK3560 Ball Joint
[5/8 in. (16 mm) rod]
or AK3561 Ball Joint
a
[3/8 in. (10 mm)]
AK3557 Clevis
or
AK3561 Ball Joint
[3/8 in. (10 mm)]
NO. 12 OR 14 WIRE
STRIPPED
SCRIBE MARKS
1/8 (3) 1/8 (3)
M18826