63-2533—04 - ML6420, ML7420 Non-Spring Return Electric Linear

63-2533—04 - ML6420, ML7420 Non-Spring Return Electric Linear
ML6420, ML7420 Non-Spring
Return Electric Linear
Valve Actuators
PRODUCT DATA
FEATURES
• Quick and easy installation.
• No separate linkage required.
• Conduit connector is standard.
• No adjustments required.
• Low power consumption.
• High close-off ratings.
• Force-limiting end switches.
• Manual operator.
• Synchronous motor.
• Corrosion resistant design.
APPLICATION
The ML6420 Non-Spring Return Electric Linear Valve
Actuators are floating control actuators used with controllers
that provide a switched or floating single-pole double-throw
(spdt) output. These actuators operate standard Honeywell
valves in heating, ventilating, and air conditioning (HVAC)
applications.
• Maintenance free.
• Direct/reverse acting with ML7420.
• Position feedback signal included with ML7420.
• Selectable 0 to 10 Vdc or 2 to 10 Vdc signal input with
ML7420.
The ML7420 Non-Spring Return Electric Linear Valve
Actuators are modulating control actuators used with
controllers that provide an analog output of 0 to 10 Vdc or 2 to
10 Vdc. These actuators operate standard Honeywell valves
in HVAC applications. An internal selector can be used to
reverse the direction of action.
Contents
Application ........................................................................
Installation ........................................................................
Ordering Information ........................................................
Operation ..........................................................................
Checkout ..........................................................................
1
3
2
6
7
63-2533-04
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS
SPECIFICATIONS
Signal Inputs (Supply Voltage Between Terminals):
ML6420:
B and 24 Vac: Drives valve stem down.
W and 24 Vac: Draws valve stem up.
ML7420: 0 to 10 Vdc or 2 to 10 Vdc.
Models:
Run Time in
sec at 60 Hz
Model
ML6420A 30 or 60a
ML7420A
Stroke in
in. (mm)
3/4 (20)
Description
Electric Linear
Valve Actuator
Dimensions: See Fig. 1.
Actuator Material:
Cover: ABS-FR plastic.
Base: PBTP-FR plastic.
Yoke: Diecast aluminum.
Weight: 2.9 lb (1.3 kg).
Actuator Stroke: 3/4 in. (20 mm).
Electrical Ratings:
Power Input: 24 Vac ±15%, 60 Hz.
Power Consumption:
ML6420: 6 VA maximum at 24 Vac.
ML7420: 7 VA maximum at 24 Vac.
Signal Source Output Resistance: 1K ohm maximum.
Signal Load: 1 mA maximum.
Close-off Pressure Ratings: See Table 1.
a
Dependant on actuator model.
Protection Standard: IP54.
Approvals:
Canadian Standards Association Listed.
Underwriter’s Laboratories, Inc. UL94-5V Flame Retardant.
Meets CE requirements.
Ambient Ratings:
Temperature:
Ambient: 14°F to 122°F (-10°C to +50°C).
Storage: -40°F to +158°F (-40°C to +70°C).
Maximum Valve Medium: 300°F (150°C).
Humidity: 5 to 95 percent relative humidity, noncondensing.
Cable entry: Conduit connector and one knockout on case.
Accessories:
43196000-001 High Temperature Kit (for actuators with
3/4 in. stroke) Increases temperature range high-end to
428°F (220°C).
For ML6420
43191679-111 Single Auxiliary 10K ohm Potentiometer.
43191679-112 Single Auxiliary 220 ohm Potentiometer.
43191680-105 Dual Auxiliary Switch (for 24 Vac use only).
Stem Force: 135 lbf (600N).
Table 1. Close-off ratings for ML6420, ML7420 Electric Linear Valve Actuators and Honeywell Valves (psi).
Type
Flange
NPT
Valve
1/2 in.
3/4 in.
1 in.
1-1/4 in. 1-1/2 in.
2 in.
2-1/2 in.
3 in.
V5011A
—
—
—
—
—
—
28
16
V3350/3351/3450/3451
—
—
—
—
—
—
21
14
V5013B,C; V3360/3361/3460/3461
—
—
—
—
—
—
21a
14a
V5011F,G
150b
150b
150b
134b
77
49
28
16
V5011H,J
150
150
150
145
—
—
—
—
V5011N1xxx, V5011N3xxx, V5013N
230
230
163
104
67
37
V5011N2xxx
100
100
100
100
V5013F
150
150
150
126
77
49
aRepresents
bDo
maximum pressure difference between the outlet and either of the two inlets.
not exceed 100 psi with V5011G valves used in steam applications.
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.
2.
Your local Honeywell Environmental and Combustion Controls Sales Office (check white pages of your phone directory).
Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
3. http://customer.honeywell.com or http://customer.honeywell.ca
International Sales and Service Offices in all principal cities of the world. Manufacturing in Belgium, Canada, China, Czech
Republic, Germany, Hungary, Italy, Mexico, Netherlands, United Kingdom, and United States.
63-2533—04
2
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS
Mounting
1.
5-5/15 6-5/16
(135) x (161)
12-11/16 (322)
MINIMUM
CLEARANCE
2-11/16 (67)
2.
NOTE: To assure even pressure on the collar, first
tighten the nuts finger-tight and then alternate
turning each U-bolt nut until both are snug.
9-3/16
(233)
3.
9-9/16
(242)
1/2 (13) FPT
Place the actuator on the valve with the U-bolt around
the valve collar. See Fig. 2.
Place the U-bolt against the valve collar and secure the
actuator to the valve by turning each U-bolt nut clockwise.
4.
5-9/16
(141)
5.
YOKE
DIAMETER
1-3/8 (35)
6.
Push aside the stem button retaining clip and hold. See
Fig. 3.
Lift valve stem until the head of the valve stem button is
inside the large slot of the stem button retaining clip on
the actuator.
Release the stem button retaining clip to secure the stem
button. Check to make certain the stem button is secured
by the retaining clip.
Remove the cover from the actuator using a Phillips or
crosspoint screwdriver. See Fig. 4.
M17419
Fig. 1. Approximate dimensions of ML6420, ML7420
Electric Linear Valve Actuator in in. (mm).
INSTALLATION
When Installing this Product...
1.
2.
3.
4.
Read instructions carefully. Failure to follow them could
damage the product or cause a hazardous condition.
Check ratings and description given in the specifications
to make sure the product is suitable for your application.
Installer must be a trained, experienced service
technician.
After installation is complete, check out product
operation as provided in these instructions.
M6632
CAUTION
Electrical Shock or Equipment Damage Hazard.
Fig. 2. Attaching actuator to valve collar.
Can shock individuals or short equipment circuitry.
Disconnect power supply before installation.
Location
Install the actuator in a location that allows enough clearance
for mounting accessories and for servicing.
CAUTION
Equipment Damage Hazard.
Can damage actuator due to condensation or a
valve gland leak.
Install the actuator in a position above horizontal.
M6633
Fig. 3. Securing actuator to valve.
3
63-2533—04
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS
M6630
Fig. 5. Connecting power and control wiring.
M17420
ML6420A,B
Fig. 4. Removing actuator cover.
T6984 (FLOATING CONTROLLER)
Wiring
All wiring must comply with local electrical codes, ordinances
and regulations. Voltage and frequency of the transformer used
with the actuator must correspond with the power supply and
actuator characteristics. See Fig. 6 through 11 for typical wiring
hookups.
W
B
2
ALL WIRING BLOCKS HAVE THE SAME
NUMBER OF TERMINALS (8), BUT THE ONLY
TERMINALS THAT ARE ACTIVE ON THIS
BLOCK ARE T1, T2, W, AND B.
Feed power and control wires through the conduit
connector located on the bottom of the actuator case.
See Fig. 5.
3
T
Y
THE T-Y-G TERMINALS ARE A THREE TERMINAL
WIRING BLOCK SEPARATE FROM THE MAIN
BLOCK. THEY DO NOT APPEAR ON ALL MODELS
BECAUSE THEY ARE FOR A SINGLE FEEDBACK
POTENTIOMETER (10K OR 220 OHMS). THE
REQUIRED WIRING BLOCKS ARE PART OF
THE POTENTIOMETER ACCESSORY KITS.
G
1
L1
(HOT)
L2
MOTOR OPEN SIGNAL DRAWS VALVE STEM
UPWARDS. MOTOR CLOSE SIGNAL DRIVES
VALVE STEM DOWNWARDS.
M32766
Fig. 6. ML6420 wiring.
Conduit connection or removal can break an
unsupported connector.
When removing or attaching conduit, use a wrench to
support the motor connector.
5.
T2
COMMON
POWER SUPPLY. PROVIDE DISCONNET MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
3
CAUTION
Equipment Damage Hazard.
4.
T1
24 Vac
1
4
3.
WIRING
STRIP
O
Can shock individuals or short equipment circuitry.
Disconnect power supply before installation.
2.
2
MOTOR CLOSE
CAUTION
Electrical Shock or Equipment Damage Hazard.
1.
4
MOTOR OPEN
ML7420
Using the wiring diagram in Fig. 6, connect power and
control wires. Make sure that all wiring is correct.
For ML7420 only: Check the selector for proper settings.
See Signal Input Failure section for details.
When wiring is complete, replace the actuator cover. See
Fig. 7.
Apply power and control signals to the actuator.
WIRING
STRIP
2
F
F
+
–
+
–
INPUT
(FEEDBACK)
OUTPUT
3
T2
T1
O1
O2
1
L1
(HOT)
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2
2-10 Vdc FEEDBACK SIGNAL. SEE OUTPUT SIGNAL
FEEDBACK SECTION.
3
0-10 Vdc OR 2-10 Vdc CONTROL SIGNAL. SEE SIGNAL
INPUT (+) SECTION.
M17422
Fig. 7. ML7420 wiring using feedback output from
a controller with a common transformer.
63-2533—04
4
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS
SENSOR
ML7420
WIRING
STRIP
SENSOR
1
2
3
4
WIRING
STRIP
6
5
1
L1
(HOT)
L2
F
+
–
T2
ML7420
3
2
T775
(WITH 2-10 VDC OUTPUT)
2
SINGLE
TRANSFORMER
40 VA 24 VAC
1
1
M17423
ML7420
SENSOR
1
2
3
4
5
1
L1
(HOT)
L2
+
–
2
M17426
DIRECTION
OF ACTION
INPUT SIGNAL
RANGE
W3
W2
INPUT SIGNAL
FAILURE
6
F
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 11. ML7420 wiring using a 4 to 20 mA
control signal and a common transformer.
Fig. 8. ML7420 wiring using a 2 to 10 Vdc
control signal and separate transformers.
W1
SINGLE
TRANSFORMER
40 VA 24 VAC
1
T1
LED
O1
1
6
500 OHM
RESISTOR
T775
(WITH 4-20 MA OUTPUT)
O2
1
O2
5
T1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
T2
3
O1
L1
(HOT)
L2
WIRING
STRIP
4
1
L1
(HOT)
L2
T2
T1
1
3
+
–
O1
O2
2
F
DUAL
TRANSFORMERS
1
1
T775
(WITH 2-10 VDC OUTPUT)
M33403
Fig. 12. Pushbuttons and potentiometer (default
positions).
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
M17424
Fig. 9. ML7420 wiring using a 2 to 10 Vdc
control signal and a common transformer.
ML7420
WIRING
STRIP
SENSOR
1
2
3
4
5
6
1
L1
(HOT)
L2
F
+
–
T2
3
2
DUAL
TRANSFORMERS
1
T1
O1
O2
M17428
500 OHM
RESISTOR
Fig. 13. Replacing actuator cover.
T775
(WITH 4-20 MA OUTPUT)
L1
(HOT)
1
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
M17425
Fig. 10. ML7420 wiring using a 4 to 20 mA
control signal and separate transformers.
5
63-2533—04
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS
Auxiliary Potentiometers
The 43191679 Auxiliary Potentiometers can be used as
feedback potentiometers and to provide remote indication of
valve position. See the Installation Instructions packed with the
potentiometers.
Auxiliary Switches
The 43191680 Dual Auxiliary Switch can be used on both the
ML6420 and ML7420 Electric Linear Valve Actuators. Switching
points are adjustable over the full length of the actuator stroke;
for example, the switch can be used to switch pumps or to
provide remote indication of any stroke position. See the
Installation Instructions packed with the auxiliary switch.
CAUTION
Equipment Damage Hazard.
Improper voltage damages the auxiliary switch
beyond repair.
Use the 43191680 Dual Auxiliary Switch only with
24 Vac applications.
M6640
Fig. 14. Manual operator knob.
OPERATION
ML7420
General
Signal Input (+)
In the actuator, the drive of a synchronous motor is converted
into the linear motion of the actuator stem by using a spur gear
transmission. A button retainer clip connects the actuator stem
to the valve stem.
The range of the analog input signal (+) can be changed by
pressing the right-hand pushbutton (W2) located on the printed
circuit board (see Fig. 12). If the corresponding LED is lit, this
indicates that the actuator is set for 0 to 10 Vdc operation
(factory setting); if it is dark, the actuator is set for 2 to 10 Vdc
operation.
Manual Operation
Signal Input Failure
The ML6420 and ML7420 are equipped with a manual
operator knob (see Fig. 14) to open or close the valve in the
event of power failure:
1. Turn off or disconnect the power supply before manually
operating the actuator.
2. Push down on the manual operator knob and turn the
knob:
a. Counterclockwise to drive the stem downward.
b. Clockwise to draw the stem upward.
Using the potentiometer (W1) located on the printed circuit
board (see Fig. 12), the actuator can be adjusted such that in
case the signal input fails (e.g., due to a broken wire) or
exceeds 12.5 V, the actuator will run to any pre-configured
position between 0% and 100%. The factory setting is with the
actuator stem in the central position (50%).
NOTE: The two pushbuttons (W3 and W2) and the potentiometer (W1) are accessible after the cover has
been removed and are located at the rear side of
the protection sheet of the printed circuit board.
IMPORTANT
Manual operation allows very high closing force that
can jam the actuator spindle, exceed the force switch
ratings, and stop the motor. After a manual valve
close-off operation, release the spindle one turn by
turning the manual operator knob. This will ensure
automatic disengagement of the manual operator
upon power resumption.
Output Signal Feedback (F)
An analog output signal (2 to 10 Vdc) that represents the
actual actuator stem position is available at terminal F. It can be
used for remote indication of the stem position. When the
actuator stem is fully downward, the output signal is 10 Vdc.
NOTE: If the manual operator knob is not pushed in while
turned, it will rotate only a short distance before
disengaging without power resumption.
When the valve stem is up, the output signal is 0 or 2 Vdc. The
output of the signal does not change when the action of the
actuator is reversed using W3. See Direction of Action.
Actuator Override
To override the control signal (for freeze protection or similar
applications), connect the 24 Vac common (T2) to either
terminal O1 or O2. Connecting to terminal O1 fully extends the
actuator stem. Connecting to O2 fully retracts the actuator
stem.
63-2533—04
6
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS
Direction of Action (ML7420 only)
The control signal (+) is ignored when the override signal is
applied to terminal O1 or O2. This override can be achieved
with a switch or a relay. See Fig. 15.
The direction of action can be reversed by pressing the lefthand pushbutton (W3) located on the printed circuit board (see
Fig. 12). If the corresponding LED is lit, this indicates that the
actuator stem will be up at a control signal of 0(2) Vdc (factory
setting); if it is dark, the actuator stem will be down at a control
signal of 0(2) Vdc.
ML7420
WIRING
STRIP
2
F
F
+
–
+
–
INPUT
(FEEDBACK)
OUTPUT
3
T2
T1
O1
SP3T
OVERRIDE
SWITCH
O2
4
1
L1
(HOT)
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
2
2-10 Vdc FEEDBACK SIGNAL. SEE OUTPUT SIGNAL
FEEDBACK SECTION.
3
0-10Vdc OR 2-10 Vdc CONTROL SIGNAL. SEE SIGNAL
INPUT (+) SECTION.
4
SEE OVERRIDE SECTION FOR DETAILS ON
OVERRIDE OPERATION.
M17429
Fig. 15. Connections for overriding control signal
to drive ML7420 to a specific position.
CHECKOUT
The actuator can be checked out either directly or by using a controller.
Direct Checkout
1.
2.
3.
4.
5.
Controller Checkout
1.
Mount the actuator for the required application; see
Installation section.
Check the valve position and make sure that 24 Vac is
correctly applied to the actuator.
Apply the power to the appropriate leadwires to move the
valve.
If the actuator does not move, make sure the actuator is
properly installed/wired.
If the actuator installation and wiring are both correct and
the actuator does not run, replace the actuator.
2.
3.
4.
5.
6.
7
Adjust the setpoint of the controller to call for opening the
valve. Observe the actuator.
If the valve is closed, it should begin to open.
If the valve remains closed, move the setpoint further
toward the open setting.
If the valve does not move, check for 24 Vac in the
actuator power input.
If 24 Vac is present and the actuator does not operate,
check the voltage across the controller leadwires to
determine if the device is miswired.
If the wiring is correct, 24 Vac is present on the power
input terminals, and the actuator does not run, replace
the actuator.
63-2533—04
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com
® U.S. Registered Trademark
© 2012 Honeywell International Inc.
63-2533—04 M.S. Rev. 01-12
Printed in United States
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement