LVR27A-602 Crank Arm Mounting Instructions

Вид документа	Інструкція з монтажу
Виробник	JCI
Код документа	lvr27a-602-crank-arm-mounting-instructions
Група обладнання	LVR27A-602
Сторінок	8
Мова документа	англійська
Розмір файлу	0.1 МБ

Текст документа

Part Included

Screw

Retaining Nut
and Screw

Figure 1: LVR27A-602 Actuator Crank Arm

The M110 and M130 motor actuators with spring return are provided with a
LVR27A-602 adjustable crank arm. This crank arm is also available for use with
non-spring return models and is typically used to link the actuator to the damper
linkage or drive.

Accessories
One or more of the following accessories may be required to complete
installations:
D-9999-154 Swivel Ball Joint or
D-3073-604 Swivel Ball Joint (weatherproof), quantity two
BKT22A-602 Right angle mounting bracket or equivalent
ROD16-2 5/16 inch diameter x 24 inch long plated steel push-rod shaft
ROD16-3 5/16 inch diameter x 48 inch long plated steel push-rod shaft
D-9999-134 Blade Pin Extension Kit
LVR27A-600 Damper crank arm 1/2 inch shafts
D-9999-100 Blade arm for D-1300 Dampers
BKT19A-600 Blade arm for “double-vee” dampers

Part Number 34-636-143 1
Rev. — (1093)
© 1993 Johnson Controls, Inc. Printed in U.S.A.
Tools Required
Wrench, 7/16 inch, two required for ball joint
Wrench, 11/32 inch
Screwdriver, flat-blade
5/16 inch hex driver

Applications
The LVR27A-602 adjustable crank arm may be used for motor actuator
rotations from 45° to 160°. Use of 160° rotation provides extra torque to the
damper through the linkage/crank arm ratios. Also it tends to linearize the
damper air flow characteristics and provides increased travel time, which is
generally beneficial on control damper systems. See the motor actuator
technical bulletin for travel adjustments.
When used with Johnson Controls D-1300 dampers, a D-9999-134 Blade Pin
Extension Kit is required. The extension shaft must never be powered without
the bearing support included in the kit.
Note: The D-9999-142 kit should only be used as a replacement item or
where other means of support is provided.
The M100 can be mounted inside, outside or on top of a duct or AHU. The
actuator can drive a blade, jack shaft, or crank arm.
On spring return applications, the installer must determine whether the damper
will operate normally open or normally closed, the direction of rotation, and the
actuator zero position prior to installation.
The following procedure covers an application with an actuator as may be
mounted outside the duct. The process is virtually the same for inside the duct
applications by using a blade arm such as D-9999-100 in place of damper crank
arm LVR27A-600 as illustrated.

2
Procedures
The actuator crank arm (LVR27A-602) has a slot that allows an adjustable
actuator crank radius from 1-11/16 inch to 2-7/8 inch.
The crank arm is secured to the motor actuator shaft in position increments of
22-1/2 angular degrees by removing the screw securing the two pieces of the
crank arm.
To properly adjust the damper linkage for the desired damper movement when
using a motor actuator with travel of approximately 160°, proceed as follows:
1. Mount the motor actuator as close to the damper shaft as practical with
their respective shafts parallel.

Adjustable Radius

Figure 2: Actuator Crank Arm Radius

2. Set the actuator crank radius length for the rotation required. If the
actuator rotation is 160° and the damper is 90°, the actuator crank length is
typically set at 2-1/16 inch radius as shown in Figure 2. The damper crank
arm will be set at 2-7/8 inch radius. At this position, the effective torque
available to the damper shaft will be approximately 1.4 times the rated
actuator torque. Thus an M130 produces 70 in·lb working torque available
at the damper, and an M150 would produce 210 in·lb.

3
Damper
Shaft
Damper Travel
Limit
Damper
Travel
Limit
Damper
Crank Arm
Ball Joint Locations Radius
(see chart)
Midpoint of
Damper Stroke

Figure 3: LVR27A-600 Damper Crank Arm

3. Mount the damper crank arm on the damper shaft and tighten the retaining
screw.
4. Rotate the damper crank arm as shown in Figure 3 to determine the
angular rotation of the damper.
5. With the damper angular rotation determined, position and secure the ball
joint to the damper crank arm as shown in the following chart:
Damper Damper Actuator Actuator Damper Torque :
Rotation Crank Rotation Crank Actuator Torque
Degrees Radius Degrees Radius

90 2-7/8 160 2-1/16 1.4:1

90 2-1/8 90 2-1/8 1:1

60 4-1/6 160 2-1/16 1.9:1

60 3 90 2-1/8 1.4:1

45 4-1/2 160 1-3/4 2.5:1

45 4 90 2-3/16 1.8:1

Other combinations may be used to obtain similar results.
Note: The largest crank radius combination will decrease forces on the ball
joint swivels and will reduce push-rod bending.
6. Tighten the ball joint to the crank arm using two 7/16 inch wrenches.
7. Disconnect power to the actuator.
8. Remove the actuator top cover.
9. Refer to the technical bulletin packaged with the actuator being used and
adjust the travel for the desired amount of rotation.

4
Crank Arms Parallel at
Mid-stroke

CCW
Position CW Position Damper
90° Rotation Shaft
160° Rotaion

LO AD EN D

Figure 4: Crank Arm Positions

10. Position the LVR27A-602 crank arm onto the stamped load end of the
M100 drive shaft so that it is parallel to the damper crank arm as shown in
Figure 4. For application other than 90°, the damper and actuator crank
arms will only be parallel at mid-stroke.
11. Tighten the actuator crank arm retaining nut and screw using a 11/32 inch
wrench and flat-blade screwdriver.
12. Attach the ball joint to the actuator crank arm in the position as shown in
the chart on page 4.
13. Tighten the ball joint to the actuator crank arm using two 7/16 inch
wrenches.

5
Push-rod

L O AD E N D

Figure 5: Measuring Push-Rod

14. Insert the push-rod through the two ball joints and lightly secure the
push-rod.
15. Measure the length of the push-rod that will be required and mark the
push-rod for cutting. Remove the push-rod from the ball joints and cut to
the measured length. Make sure that the ends are free of any burrs.
Note: A short push-rod may be difficult to adjust. Twelve inches should be
the minimum length. An excessive length between the crank arm and
ball joint may cause the push-rod to bow excessively.
16. Insert the push-rod and tighten inside the ball joints using a 7/16 inch
wrench.

Remove Screw
to Allow Free
Rotation

LO AD EN D

Figure 6: Free Operation

17. Verify free operation from one limit to the other by using a 5/16 inch hex
driver and removing the screw to enable rotation of the crank arm without
powering up the actuator. This will allow the linkage to rotate through the
drive angle selected without being removed from the actuator or risking
damage during powered motor operation.

6
18. As described in the technical bulletin packed with the motor actuator,
make sure that the motor actuator does not stall or bind against its load.
Final adjustments for rotation are accomplished using the actuator travel
adjustment.
19. Remove the 24 VAC connections and jumpers used for cycling the motor
actuator. Connect the power and control signals to the motor actuator as
described in the technical bulletin.
20. Install the top cover.
21. Verify operation through the controller.

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