95C-10879—01 - ML6984 Direct Coupled Valve Actuator

95C-10879—01 - ML6984 Direct Coupled Valve Actuator
ML6984
Direct Coupled Valve Actuator
PRODUCT DATA
FEATURES
• Allows the use of one common transformer power
supply for multiple actuators and controllers
• Self-contained, motorized valve linkage
• Linkage self-adjusts to valve stroke of up to 19mm (3/4")
• Multipose mounting
• Strong valve seat closing force 710 Newton (160 lbs.)
• Compact size for easy installation in confined area
• One device for either Vac or Vdc power supply
application
• Electronic current sensing provides internal protection
and positive full closing force
• Field-addable auxiliary switches available
• Compatible with 3-wire or 5-wire control systems
APPLICATION
The ML6984 is a self-contained, self-adjusting, linear
motorized linkage that mounts directly onto V5011 two-way or
V5013 three-way valves and provides up to 19 mm (3/4") of
linear travel (stem lift). For use with low voltage 3-wire SPDT
Series 20 (on-off), Series 60 (floating) electromechanical (dry
contacts) or electronic (triac) output controllers.
Contents
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Operation and Checkout ..................................................
1
1
2
2
5
95C-10879-01
ML6984 DIRECT COUPLED VALVE ACTUATOR
SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances. Therefore,
an individual unit may not exactly match the listed
specifications. Also, this product is tested and calibrated under closely controlled conditions and some
minor differences in performance can be expected if
those conditions are changed.
Shipping Weight:
Approx. 1 kg (2.2 lbs)
Ambient Rating:
Operating Temperature: 0°C to 55°C (32°F to 131°F)
Shipping Temperature: -40°C to +65°C (-40°F to 150°F)
Relative Humidity: 15% to 95% at 40°C (104°F)
Mechanical Ratings:
Stroke—19mm (3/4") or less
Stroke timing-—Approx. 63 seconds for 3/4" stroke
Closing Force—710N (160 lbs.) Nominal*
*Rating applies to both directions.
Accessories/Parts:
43196000-001—High temperature kit
272630A—Auxiliary switch assembly (1-SPDT)
272630B—Auxiliary switch assembly (2-SPDT)
40003793-005—Mounting hardware bag assembly
Acoustic Noise:
55 dBA max. Sound Pressure Level at 1 m (39") distance.
Performance Specifications:
Minimum Signal Input Duration: 200 milli-secondLife Expectancy—(at rated load and power conditions) 50,000 full
stroke cycles plus 1,000,000 repositions at 10% stem
travel or 10 years, whichever occurs first.
Electrical Ratings:
Power supply/consumption:
24V (Nominal), 50/60Hz or 24 to 28 Vdc
6VA(Running), 12VA(Valve seating)
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
3. http://customer.honeywell.com or http://customer.honeywell.ca
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
95C-10879—01
2
ML6984 DIRECT COUPLED VALVE ACTUATOR
CAUTION
Minimum required control signal input duration is
200 milli-second. Short and rapid cycling/
repositioning will result in possible device lock-up
or reduced service life.
7/8 (22)
KNOCKOUT
4-1/64
(102)
1/4 – 20 NUT [2]
4
(102)
2 (51)
1/4 – 28UNF
7-3/64
(179)
3-13/64 1-17/32
( 8 2)
(39)
4-9/16
(116)
3-1/16
( 7 8)
51/64
(21)
4-1/16
(103)
2-3/32 17/64
(53) (7)
1-3/8 (35)
MOUNTING
DIA.
25/32
(20)
13/64
(6)
3/4
( 1 9)
NOMINAL
STROKE
1-21/32
(42)
2-13/64 (56)
3-7/32 (82)
3-3/32
(78)
2-23/32 (69)
YELLOW
2-53/64 (72)
SILVER
25/64
(10)
3 / 1 6 ( 5 ) DIA.
M32553
Fig. 1. Dimensions of Ml6984 valve actuator in mm (inches).
Mounting
1.
4 (102) FOR
ACTUATORS WITH
AUXILIARY
SWITCHES 3 (76)
2.
3.
12
(305)
4.
MINIMUM
MOUNTING
CLEARANCE
Ensure that the valve body is installed correctly, that is,
the arrow points in the direction of the flow.
Although the actuator can be mounted in any position, it
is preferable that the ML6984 is mounted above the
valve body. This will minimize the risk of damage to the
ML6984 in the event of condensation or a valve gland
leak.
Remove the stem button (Fig. 3) from the valve stem.
Save the set screw inside the stem button for later installation. The button itself is not needed.
Slide the position indicator (plastic disk or rubber Oring)
over the valve stem. (See inset, Fig. 3) Indicator will selfalign to the marking on the yoke after one complete
operating cycle.
Assembly of ML6984 to the valve:
1.
2.
M32558
Fig. 2. Minimum mounting clearance.
CAUTION
3.
Installer must be a trained service technician.
DO NOT electrically operate the ML6984 before
assembly to the valve because damage not apparent to
the installer may occur.
4.
3
The drive shaft of the ML6984 has a threaded hole to link
with the valve stem. Slide the yoke over the valve bonnet
(Fig. 4)
Thread the ML6984 drive shaft onto the valve stem all
the way, until it is completely attached (with no threads
showing), by turning the valve actuator in a clockwise
direction, as viewed from above (depending on the valve
models, use a pin or wrench to keep valve stem from
turning). Note that the valve actuator is shipped with
drive shaft in the midposition.
Care should be exercised when using tools on the valve
stem during tightening. (Fig. 4) DO NOT damage the
threads or other parts of the stem.
Orient the conduit hole to the most desirable direction,
then tighten the LOCKNUTS on the U-bolt.
95C-10879—01
ML6984 DIRECT COUPLED VALVE ACTUATOR
5.
POSITION INDICATOR
(PLASTIC DISK)
REMOVE
STEM BUTTON
6.
VALVE
STEM
Remove the plastic cover from the ML6984 by loosening
the two screws located on the top (Note: These screws
are captive. Rotate three complete revolutions to remove
cover ). Drop either Slot Headed or Allen Hex type of set
screw (both are included in the plastic bag ) into the top
of the shaft, slotted/ Hexed side up. Or use the set screw
from the valve stem button.
Depending on which type of set screw was used, with a
5 mm (3/16") Slotted screwdriver or 1/8"x 6" Allen
wrench (included in the plastic bag), tighten the set
screw to lock valve stem in place (Fig. 6).
CAUTION
ASSEMBLY OF THE
POSITION INDICATOR.
For proper valve operation, valve stem must be
threaded into the actuator all the way (with no
threads showing) and locked in place with the set
screw provided.
NOTE: DO NOT DAMAGE ANY PART OF THE STEM
M32559
Fig. 3. Preparation for valve assembly.
M32561
Fig. 5. U-bolt assembly.
1
3/16 (5) SLOTTED
SCREWDRIVER
OR ALLEN WRENCH
DO NOT
ADJUST
LINKAGE
SET SCREW
VALVE
BONNET
U-BOLT
2
YOKE
VALVE STEM
1
THREAD ACTUATOR SHAFT TO VALVE STEM BY ROTATING IN A
CLOCKWISE DIRECTION.
2
TIGHTEN U-BOLT NUTS TO SECURE LINKAGE TO VALVE BODY.
M32560
M32562
Fig. 4. Assembly of Ml6984A to valve.
Fig. 6. Locking Ml6984A drive shaft to valve stem.
95C-10879—01
4
ML6984 DIRECT COUPLED VALVE ACTUATOR
3-WIRE CONTROL SYSTEMS
TYPICAL ELECTRONIC
CONTROLLER
1
L1
H
24 VAC
L2
ML6984
1
W
3
T6
R
C
TYPICAL
ELECTRO-MECHANICAL
CONTROLLER
1
L1
ML6984
W
24 VAC
L2
T5
B
3
R
T6
W
R
B
T5
B
SIGNAL
SOURCE
(VDC)
2
3
5-WIRE CONTROL SYSTEM
3
W
W
ML6984
1
T6
R
L1
24 VAC
L2
B
B
T5
OR
3
T6
ML6984
+
28 VDC
W
!
R
B
T5
T6
T5
-
CAUTION:
IN MULTIPLE ACTUATORS CONNECTION, POWER SUPPLY TO ALL
ACTUATORS MUST BE CONNECTED IN A TRUE PARALLEL FASHION
TO REDUCE EXCESSIVE VOLTAGE DROP. DO NOT “DAISY CHAIN”
I.E. CONNECTED TO ONE ACTUATOR THEN BRANCHED TO ANOTHER.
1
ALLOW 0.5 AMPS MAXIMUM FOR EACH DEVICE. ACTUATORS AND CONTROLLER CAN SHARE SAME TRANSFORMER PROVIDING THE
VA RATING OF THE TRANSFORMER IS NOT EXCEEDED AND PROPER PHASING IS OBSERVED.
2
SPDT CONTROLLER CAN BE A LOW VOLTAGE SERIES 20 "ON-OFF " OR SERIES 60 "FLOATING" (CENTER-OFF) TYPE.
3
FOR MULTIPLE ACTUATORS CONTROLLED BY A COMMON CONTROLLER IN PARALLEL, THESE ACTUATORS MUST BE WIRED SO THAT
THEY ALL TRAVEL IN THE SAME DIRECTION.
M32590
Fig. 7. Wiring for ML6984 actuators.
The motor is controlled by a microprocessor. Connecting B to
R tells the microprocessor to cause the actuator to drive open.
Connecting W & R will cause the actuator to drive closed. For
"floating" control, if R remains open, the actuator will remain in
the last position.
CAUTION
In multiple actuators connection, power supply to
all actuators must be connected in a TRUE parallel
fashion to reduce excessive voltage drop. DO NOT
"daisy chain" i.e. connected to one actuator then
branched to another.
At the end of the valve stroke, the actuator will develop the
necessary force for positive valve closeoff. As forces are
developed, the current to the motor increases. The
microprocessor stops the actuator automatically when the
motor current, and forces reach the predetermined level.
OPERATION AND CHECKOUT
The recommended valve actuator power source is a class 2,
24V transformer or 28Vdc across terminals T5 &T6. Internal
circuitry provides dc power for the electronic sensing and drive
motor circuits.
5
95C-10879—01
ML6984 DIRECT COUPLED VALVE ACTUATOR
To replace ML6874:
CAUTION
1.
2.
1. Disconnect power supply before beginning
installation to prevent electrical shock and
equipment damage.
2. All wiring must comply with applicable local electrical
codes, ordinances and regulations.
3. Make certain that the voltage and frequency of the
power supply correspond to the rating of the device.
4. DO NOT electrically operate the ML6984 before
assembly to the valve because damage not
apparent to the installer may occur.
Checkout:
1.
2.
3.
NOTE: For proper operation, voltage on the T5 & T6 must not
be less than 22Vac or 24Vdc during running or force
generating stages.
4.
5.
6.
Replacement Note:
7.
8.
To replace ML684:
1.
2.
9.
The new ML6984 is a direct replacement for the old
ML684A in single actuator or parallel multiple actuators
hook-up. The old and new actuators can be mixed in the
same electrical circuit. For multiple actuators controlled
by a common controller in parallel, these actuators must
be wired so that they all travel in the same direction.
When replacing the ML684A1009 (80 lbs ) with this new
ML6984 on the V5045 valve. The already installed valve
adaptor (part # 272629A) on the valve stem and actuator
assembly is still needed.
95C-10879—01
The new ML6984 is a direct replacement for the old
ML6874 in single actuator hook-up.
For parallel multiple old ML6874 actuators applications,
an isolation relay must be used (isolation relay contacts
should be placed in the new ML6984 actuator signal
input "W" and "B" circuit).
6
Make sure the valve stem is completely screwed into the
actuator drive shaft with no threads showing.
Make sure the valve stem is locked in place with the set
screw.
With 24 Vac or 28Vdc power supply connected to T5 &
T6.
Jumper R & B. The valve stem should move up.
Jumper R & W. The valve stem should move down.
For Floating operation, open R connection. Valve stem
should remain in position.
Re-connect all control wiring.
Operate the system (valve, actuator and controller) for
several cycles to ensure proper installation.
When checkout is complete, return the controller to the
desired setting.
ML6984 DIRECT COUPLED VALVE ACTUATOR
7
95C-10879—01
ML6984 DIRECT COUPLED VALVE ACTUATOR
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com
® U.S. Registered Trademark
© 2011 Honeywell International Inc.
95C-10879—01 M.S. Rev. 07-11
Printed in U.S.A.
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