AERCO MXG-461 User Manual
A
455
4
MXG461..
CVATIX™
MXG461..P
MXF461..
MXF461..P
Modulating control valves
with magnetic actuators,
PN16
for chilled and low-temperature hot water systems or
for systems with media containing mineral oils (MX..461..P)
• Fast positioning time (< 2 s), high-resolution stroke (1 : 1000), high rangeability
• Equal-percentage or linear valve characteristic (user-selected)
• Operating voltage AC 24 V
• Switch-selected control signal DC 0/2...10 V or DC 4...20 mA
• DC 0…20 V phase cut control signal with SEZ91.6 external interface
• Indication of operating state, position feedback and manual control
• Wear-free inductive stroke measurement
• Fail-safe feature: A → AB closed when de-energized
• Low friction, robust, no maintenance required
MXG461..
MXG461..P
MXF461..
MXF461..P
Use
The control valves are mixing or throughport valves with the ready fitted magnetic
actuator for position control and position feedback. The short positioning time, high
resolution and high rangeability make these valves ideal for modulating
• control of chilled and low-temperature hot water systems
• control or dosing control of fluids containing mineral oil (SAE05...SAE50), mineral-oil-
based diesel fuels, heat transfer oils
in closed circuits.
Special silicon-free version available, type suffix ..M.
CA1N4455en
15.12.2009
Building Technologies
A
pplication examples
MX..461..P
Type summary
• Temperature control in mixing circuits for motor oil circulation
• Temperature control in mixing circuits for screw-compressors (compressed air)
• Temperature control of fuel circuits in mixing circuits for petrol and diesel oil
• High pressure control for the calibration of components for electronic injection
components
• Control of cutting-oil emulsion for industrial grinding machines
Type reference DN kVS
MX..461.. MX..461..P 1)
MX..461.15-0.6 MX..461.15-0.6P
MX..461.15-1.5 MX..461.15-1.5P
MX..461.15-3.0 MX..461.15-3.0P
MX..461.20-5.0 MX..461.20-5.0P
MX..461.25-8.0 MX..461.25-8.0P
MX..461.32-12 MX..461.32-12P
MX..461.40-20 MX..461.40-20P
MX..461.50-30 MX..461.50-30P
MXF461.65-50 MXF461.65-50P
M3P80FY M3P80FYP
M3P100FY M3P100FYP
[m3/h] [kPa] [kPa]
0,6
15
20 5,0
25 8,0
32 12
40 20
50 30
65 50
80 80
100 130
1)
for media containing mineral oils
.. = F for flanged valves
G for threaded valves
= max. permissible differential pressure across the valve’s control path, valid for the entire
Δp
max
actuating range of the motorized valve
Δp
= max. permissible differential pressure (close off pressure) at which the motorized valve will
S
close securely against the pressure (used as throughport valve)
= nominal flow rate of cold water (5 to 30 °C) through the fully opened valve (H
k
VS
differential pressure of 100 kPa (1 bar)
1,5
3,0
High performance
range
Type reference DN Type suffix Description Examples Datasheet
MXG461..M
MXF461..M
MXG461..U 15…50 U Set of 3 NPT threaded fittings
MXF461..U 65 U - MXF461.65-50U N4455
15…50
15…50
Accessories
Type reference Description
ALG..3 (.. = DN) Set of 3 threaded fittings for 3-port valves, consisting of 3 union nuts, 3 discs and
3 flat seals
Z155/.. (.. = DN)
SEZ91.6 External interface for DC 0…20 V phase cut control signal, refer to data sheet
Blank flange set with blank flange, seal, screws, spring washers and nuts
N5143
Order
When ordering, please give quantity, product name and type reference.
Δp
ΔpS
max
300 300 AC 24 V
M Siliconfree grease
enclosed
Operating
voltage
see datasheet N4454
Positioning
signal time
DC 0...10 V
or
DC 2…10 V
or
DC 4...20 mA
MXG461.15-3.0M N4455
MXG461.15-3.0U N4455
< 2 s
100
Spring
) at a
return
Product number Stock number Description
MXG461.25-8.0 MXG461.25-8.0 Threaded valve with magnetic actuator
ALG253 ALG253 Set of threaded union fittings
MXF461.20-5.0 MXF461.20-5.0 Flanged valve with magnetic actuator
Z155/20F Z155/20F Set of blank flanges
Delivery
Valve body and magnetic actuator form one assembly and cannot be separated.
The threaded fitting sets and blank flanges are packed and supplied separately.
2/14
Siemens Modulating control valves with magnetic actuators, PN16 CA1N4455en
Building Technologies 15.12.2009
A
Replacement
electronics module
SE1, ASE2
Should the valve electronics prove faulty, the electronics module must be replaced by
the ASE1 (DN15…32) or ASE2 (DN40…65) replacement electronics module.
Mounting Instructions no. 35678 are included.
Rev. no.
See overview, page 14.
Technical and mechanical design
For a detailed description of operation, refer to data sheet CA1N4028E.
Control operation
Spring return facility
Control
Manual control
The electronics module converts the positioning signal to a phase-cut power signal
which generates a magnetic field in the coil. This causes the armature to change its
position in accordance with the interacting forces (magnetic field, counterspring,
hydraulics). The armature responds rapidly to any change in signal, transferring the
corresponding movement directly to the valve plug, enabling fast changes in load to be
corrected quickly and accurately.
The valve’s position is measured continuously (inductive). The internal positioning
controller balances any disturbance in the system rapidly and delivers the position
feedback signal. The valve stroke is proportional to the positioning signal.
If the positioning signal is interrupted, or in the event of a power failure, the valve’s
return spring will automatically close control path A → AB.
The magnetic actuator can be driven by a Siemens controller or a controller of other
manufacture that deliver a DC 0/2...10 V or DC 4... 20 mA output signal.
To achieve optimum control performance, it is recommended to use a 4-wire
connection.
MANUAL
The valve control path (ports A → AB) can be opened
OFF
manually to between 80 and 90 % of the full stroke
(depending on DN) by pressing the hand wheel
AUTO
inwards and turning it clockwise (MANUAL setting).
This disables the control signal from the controller, the
MANUAL
green LED is flashing.
OFF
4455Z03
To disable automatic control of the valve, press the
hand wheel inwards and turn it anti-clockwise (to the
OFF position). The valve will close, the green LED is
flashing.
AUTO
For automatic control, the hand wheel must be set to
the AUTO position (the hand wheel will spring out),
the green LED is lit.
3/14
Siemens Modulating control valves with magnetic actuators, PN16 CA1N4455en
Building Technologies 15.12.2009
Operator controls and
indicators in the
electronics housing
1
YF X YM Y G G0
4455Z02
1 Connection terminals
2 Hand wheel
3 Opening for autocalibration
4 DIL switch for mode control
V
log
2...10V
4...20mA
ON
mA
2
3
4
4455Z01
V
lin
123
0...10V
V
ON
5
5 LED for indication of operating stat
Configuration
DIL switches
2...10V
4...20mA
V
log
123
V
lin
0...10V
4455Z01
mA
ON
OFF
V
ok
green
calib. / Man
error calib .
red
error
4461Z28
Switch Function ON / OFF Description
ON
Valve characteristic
OFF
.
(equal percentage) 1)
V
log
.
(linear)
V
lin
ON DC 2...10 V, DC 4...20 mA
Positioning signal Y
[V] or [mA]
assignment
OFF DC 0...10 V
ON [mA]
OFF [V]
1)
1)
1) Factory setting
Assignment positioning signal Y:
Voltage or current
ON
Y
ON
Selection of valve characteristic
(Positioning signal against volumetric
flow): Equal-percentage or linear
ON
ON
ON
0...10 V 2...10 V
ON
.
V
.
V
4...20 mA
4455Z08
Y
Y
4455Z09
4/14
Siemens Modulating control valves with magnetic actuators, PN16 CA1N4455en
Building Technologies 15.12.2009
Forced control input
YF
no function fully open closed
YF – Function
Signal priority
Calibration
G0
G
Y
YM
Connections Transfer
X
YF
V
100 %
0 %
0 % 100 %
• YF not connected
• valve will follow the Y-signal
Function
Y
• YF connected to G
• valve will fully open control
G0
G
Y
YM
X
YF
V V
A AB
100 %
0 %
0 % 100 %
path A AB
1. Hand wheel position MANUAL (open) or OFF (close)
2. Forced control signal YF
3. Signal input Y
The MX..461.. and MX..461..P magnetic valves are
factory-calibrated at 0 % and 100 % stroke.
G0
G
Y
YM
X
YF
A ABA AB
100 %
Y
0 %
0 % 100 %
• YF connected to G0
• valve will close control path
A AB
4455Z10
Y
When commissioning the valves, however,
(especially under extreme conditions of use) there
may still be some leakage via control path A → AB
with a 0 % stroke control signal (DC 0 V, DC 2 V or
DC 4 mA).
In this case, the valve can be recalibrated simply
and quickly:
1. Hand wheel [2] in AUTO-position
2. Use a pointed implement (ø 2 mm) to operate the
button in the opening [3] once
3. While recalibration is in progress, the LED [5] is
flashing green for approximately 10 seconds.
The valve will be briefly closed and fully opened.
If the electronics module is replaced, the valve’s
electronics must be recalibrated. For that, the hand
wheel must be set to AUTO.
5/14
Siemens Modulating control valves with magnetic actuators, PN16 CA1N4455en
Building Technologies 15.12.2009
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