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MXG461B Series
Modulating Control Valves with
Magnetic Actuators, Positioning
Control and Position Feedback for
Domestic Water
Description
Features
Product Numbers
Warning/Caution
Notations
Application
Control valves with magnetic actuators, for modulating control of domestic water, cold
water and hot water systems.
•
Fast positioning time (< 2 seconds)
•
Selectable valve characteristic: Equal percentage or linear
•
Selectable standard interface: 0/2 to 10 Vdc or 0/4 to 20 mA
•
High resolution (>1:1000)
•
High rangeability
•
Wear-free inductive stroke measurement
•
Spring return A → AB closed when de-energized
•
Positioning control and position feedback signal
•
Low-friction, heavy-duty and maintenance-free
•
Phase-cut signal input for Staefa controllers
See Table 1.
WARNING:
CAUTION:
The MX4G61B Series valves are through-port or mixing valves with magnetic
actuators. The actuator is equipped with an electronics module for positioning control
and position feedback. If the power is off, the valve control path A → AB is closed.
The short positioning time, high resolution and high rangeability make these valves
ideal for modulating control of domestic, hot and cold water systems.
Technical Instructions
Document No. 125-4461
Personal injury or loss of life may occur if you do not
follow the procedures as specified.
Equipment damage or loss of data may occur if you
do not follow the procedures as specified.
May 3, 2006
Siemens Building Technologies, Inc.
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Summary of Contents for Siemens MXG461B Series
- Page 1 If the power is off, the valve control path A → AB is closed. The short positioning time, high resolution and high rangeability make these valves ideal for modulating control of domestic, hot and cold water systems. Siemens Building Technologies, Inc.
- Page 2 The valve’s position is measured continuously. Any disturbance in the system is rapidly corrected by the internal positioning controller, which ensures that the positioning signal and the valve stroke are exactly proportional, and also delivers the position feedback signal. Page 2 Siemens Building Technologies, Inc.
- Page 3 MXG461B Series Modulating Control Valve Technical Instructions with Magnetic Actuator Document Number 125-4461 May 3, 2006 Control The magnetic actuator can be driven by any controller with a 0/2 to 10 Vdc or 0/4 to 20 mA output signal. To achieve optimum control performance, it is recommended to use a 4-wire connection for the valve.
- Page 4 Voltage or current Correcting span 0 to 10 Vdc, 2 to 10 Vdc, Offset settings of input Terminals Y and U 0 to 20 mA 4 to 20 mA and output – (equal (linear) Characteristic percentage) Page 4 Siemens Building Technologies, Inc.
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Page 5: Signal Priority
MXG461B Series Modulating Control Valve Technical Instructions with Magnetic Actuator Document Number 125-4461 May 3, 2006 DIP Switches, Continued 0 to 10 V 2 to 10 V 0 to 20 mA 4 to 20 mA Figure 6. Selection of Valve Figure 5. -
Page 6: Installation Notes
B with the accessories supplied (nut, cover and gasket). Figure 11. Straight-through Application. Mounting Position Vertical to horizontal mounting: Do not mount the valve below the horizontal. IP31 IP31 Figure 12. Acceptable Mounting Positions. Page 6 Siemens Building Technologies, Inc. -
Page 7: Specifications
MXG461B Series Modulating Control Valve Technical Instructions with Magnetic Actuator Document Number 125-4461 May 3, 2006 Connecting the Z366 The Z366 includes connectors for the Stem Heater stem heater. The stem heater is designed for a 24 Vac power supply. -
Page 8: Connection Terminals
Measuring neutral (= G0) 0 to 10Vdc / 2 to 10Vdc Positioning feedback signal 0 to 20 mA / 4 to 20 mA Override input Figure 14. In case of strong vibrations, use high-flex stranded wires. Page 8 Siemens Building Technologies, Inc. - Page 9 MXG461B Series Modulating Control Valve Technical Instructions with Magnetic Actuator Document Number 125-4461 May 3, 2006 Connection Terminals, Transformer Continued Controller System neutral (SN) AC/DC 24 V Operating voltage Controllers with phase-cut System potential (SP) 0 to 10Vdc / 2 to 10Vdc...
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Page 10: Application Examples
The valve stem is sealed from external influences by a maintenance-free gland. • If the red LED is lit, the electronics must be recalibrated or replaced. • If required, the circuit board can be replaced. Order part number ASE12. Page 10 Siemens Building Technologies, Inc. - Page 11 MXG461B Series Modulating Control Valve Technical Instructions with Magnetic Actuator Document Number 125-4461 May 3, 2006 Dimensions ł 1.97 (ł 50) ł E Figure 18. Dimensions in Inches (Millimeters). NOTE: The screwed fittings and gaskets are supplied with these valves.