Honeywell ML7420A, ML7425A, ML7425B User Manual

M
L7420
M
T
L7425

ML7420A/ML7425A,B
Electric Linear Valve Actuator
SPECIFICATION DATA
FEATURES
Easy and quick installation
No separate linkage required
No adjustments
Low power consumption
Force limiting end switches
Spring return models
Manual operator
0 to 10Vdc or 2 to 10Vdc signal input
Position feedback signal
Synchronous motor
Direct / reverse action
Stroke position on signal failure selectable
Corrosion resistant design
Maintenance free
GENERAL
The ML7420A / ML7425A,B actuators are for modulating control with controls providing an analog output of 0 to 10Vdc or 2 to 10Vdc. They operate Honeywell’s standard valves in heating, ventilation and air conditioning (HVAC) applications. The direction of movement is reversible by means of an internal selector plug.
SPECIFICATIONS
Temperature Limits
Ambient operating limits -10 to +50°C Ambient storage limits -40 to +70°C Medium valve temperature Max. 150°C
Signals
Signal input voltage y = R Signal source output resistance 1kΩ max. Position feedback signal x = 2 to 10Vdc Load 1mA max.
Safety
Protection class II in acc. with EN60730-1 Protection standard IP54 in acc. with EN60529
Flame retardant housing V0 in acc. with UL94 (with metal cable gland)
0 to 10Vdc or 2 to10Vdc
= 100k
i
@ 5 to 95%rh
@ 5 to 95%rh
his product meets the re quirements of
EN0B-0624GE02 R0399
CE
ML7420A/ML7425A,B
Wiring
Wiring terminals 1.5mm Cable entry PG13.5. Two additional knock
Model Number ML7420A3006 ML7420A3014 ML7425A3005 ML7425B3004
Supply Voltage 24Vac +/-15% 50/60Hz Power Consumption
Signal Input 0(2)Vdc Actuator stem retracted. Two way valve:open, three way valve port A-AB:closed * Signal Input 10Vdc Actuator stem extended. Two way valve:closed, Three way valve port A-AB:open * Stroke 20mm Run Time @ 50Hz 1min 0.5min 1.8min Close-off Force ≥ 600N Spring Return Time
Spring Return Direction
* Factory setting; can be reversed by action selector plug W3
2
outs PG11 and PG13.5 for auxiliary switch and potentiometer accessories
5VA 7VA 12VA
 
OPERATION
Weight
non spring return type 1.3kg spring return type 2.4kg
Material
Cover ABS-FR Base glass fibre reinforced plastic Yoke aluminium diecast
≈12s
Actuator stem extends
at power failure
Actuator stem retracts
at power failure
General
The drive of a synchronous motor is converted into linear motion of the actuator stem by using a spur gear transmission. The actuator stem is connected with the valve stem by a button keyed retainer connection.
An integrated spring package limits the stem force to a factory adjusted value in either direction. Installed microswitches switch off the actuator precisely when the specified stem force is reached.
Manual Operation
Actuators without spring return are equipped with a manual operator used in case of power failure. Manual operation is only possible after the power supply is switched off or disconnected.
To operate push the manual operator knob down and turn clockwise to move the stem downward and counter-clockwise to move the stem upward. If the actuator returns to automatic control, the manual operator knob unlocks automatically.
On actuators with spring return the manual operator is located under the cover.
Spring Return
The ML7425A,B spring return types provide a defined safety position of the valve in case of power failure.
The spring return actuators are shipped from the factory with a shipment stop (to lock the knob) in order to allow connection of the stem button retainer to the valve stem without power supply.
Electrical Installation
The actuators are delivered with a pre-installed cable gland PG13.5 and two additional knock outs for PG11 and PG13.5. Cable length/diameter for field mounting:
Max. 200m/1.5mm
100m/1.5mm
To avoid malfunction it is necessary to connect 24Vac power and ground (see Fig. 2).
In case of replacement please note that the override switch has been changed (see Fig. 2).
2
or
2
(ML7420A3014)
NOTE
CAUTION
NOTE
CAUTION
Input Signal Failure
By means of selector plug W1* the actuator can be selected such, that in case of a signal input failure,(e.g. a broken wire) the actuator will run to one of the three positions:
0%: actuator stem position for 0(2)Vdc 50%: actuator stem in central position 100%: actuator stem position for 10Vdc
W1 is set by the factory to 50%.
Input Signal Range
The range of the analog input signal Y can be changed by changing the position of selector plug W2*
EN0B-0624GE02 R0399 2
Action
The direction of action can be changed by repositioning of selector plug W3*. It is set by the factory such that the stem extends at increasing signal and retracts at decreasing signal.
NOTE
CAUTION
*Jumper plugs W1, W2 and W3 are accessible after the cover has been removed. They are located on the rear side of the protection sheet of the printed circuit board (see EN1C-0073 and EN1C-0074).
Output Signal ”POSITION”
An analog output signal 2 to 10Vdc POSITION is available which represents the actual actuator position. It can be used for remote indication. When the actuator stem is extended the output signal is 10Vdc.
Accessories
Auxiliary switches
The actuators can be equipped on site with an auxiliary switch unit with two switches. Their switching points are adjustable over the full length of the actuator stroke. The switches can be used to switch pumps or provide remote indication of any stroke position. A cable gland PG13.5 is delivered with the unit.
Part number: 43191680-005
ML7420A/ML7425A,B
Auxiliary potentiometer
Auxiliary potentiometers are available for mounting on site. They can be used as feedback potentiometer and or to provide remote indication to the valve position. A cable gland PG13.5 is delivered with the unit.
Part number: 43191679-011 (10kΩ) Part number: 43191679-012 (220Ω)
High Temperature Kit
(for applications >150°C medium temperature)
High Temperature Kit,
Order Number
43196000-001
43196000-002
Valve DN
V5011A/V5011K V5013A/V5013G V5011R/V5013R V5328A/V5329A
V5011A V5013A/V5013G V5328A/V5329A
V5049A
V5050A
15 - 40 15 - 40 15 - 50 15 - 32
50
50 40 - 80 15 - 65 15 - 80
CLOSE-OFF PRESSURE RATINGS in kPa
Stem Force 600N Stroke 20mm Valve mm 15 20 25 32 40 50 65 80 Size inch 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3
Valves Close-Off Pressure Ratings V5011R 1600 1600 1000 700 460 260
V5011K 1600 1600 1300 1000 V5013R 1600 1600 1000 700 460 260 V5328A 1600/1000 1000 1000 600 350 200 120 50 V5329A (PN16) 1000 1000 1000 790 480 260 160 100 V5329C (PN6) 600 600 600 600 480 260 160 100 V5049A 1600/1000 1000 1000 600 350 200 120 V5050A 1000 1000 1000 600 350 200 120 50 V5095A 1600 1600 1600 1600 1600 1600 1600
For specific data of above valves see Specification Data No.:
V5011R EN0B-064 V5011K EN0C-0560 V5013R EN0B-065 V5328A EN0C-0432 V5329A,C EN0C-0434 V5049A EN0C-0433 V5050A EN0C-0435 V5095A EN0C-0490
3 EN0B-0624GE02 R0399
ML7420A/M7425A,B
M
M
DIMENSIONS
L7420A
with High Temperature Kit 402mm
Fig. 1 Dimensions in mm
L7425A,B
with High Temperature Kit 444mm
EN0B-0624GE02 R0399 4
WIRING
M
M
0
M
C
Y
24V24V321CD12
P
2
0
2
24VC
Y
24V2
3
21CD1
2
P
2
0
2
2
Y
2
2
3
21CD1
2
C
P
0
S
B
C
Y
2
2
3
21C
D12SB
P
ML7420A/ML7425A,B
L7420A ... - 1/- 2/- 3
0 / 50 / 100%
- 10V/2 - 10V
/
W2 W1W3
M
ML7425A,B ... - 1/- 3
0 / 50 / 100%
- 10V/2 - 10V
M
/
W2 W1 W3
OSITION
ENTRA
OSITION
4V 4V
L7420A ... - 4
-10Vdc
-10Vdc 4V
4V
OSITION
ENTRA
2-10Vdc 0-10Vdc
24V 24V
L7425A,B ... - 4
-10Vdc
-10Vdc
4V 4V
OSITION
4V 4V
2-10Vdc 0-10Vdc
24V 24V
ENTRA
ENTRA
Auxiliary Switches (Option - Part Number: 43191680 - 005)
3 4
1 2
S1 S2
5
6
250Vac/10A
Fig. 2 Wiring
5 EN0B-0624GE02 R0399
ML7420A/ML7425A,B
Honeywell Regelsysteme GmbH
Honeywellstr. 2-6
D-63477 Maintal
Tel. (0 61 81) 401-1 Fax (0 61 81) 401-400
Subject to change without notice. Printed in Germany
EN0B-0624GE02 R0399

Manufacturing location is certified according to
DIN
EN ISO 9001
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