AERCO MXG-461 Series Control Valve - Manufactured by Siemens - Manual (Page 6)

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Siemens Modulating control valves with magnetic actuators, PN16 CA1N4455en
Building Technologies 15.12.2009
The two-color LED display indicating operating status can be viewed by opening the
cover of the electronics module.
LED Indication Function Remarks, troubleshooting
Green Lit Control mode Automatic operation; everything o.k.
Flashing Calibration
In manual control Wait until calibration is finished
(green or red LED will be lit)
Hand wheel in MANUAL or OFF position
Red Lit Calibration error
Internal error Recalibrate (operate button in opening 1x)
Replace electronics module
Flashing Mains fault Check mains network (outside the frequency or
voltage range)
Both Dark No power supply
Electronics faulty Check mains network, check wiring
Replace electronics module
As a general rule, the LED can assume only the states shown above (continuously red
or green, flashing red or green, or off).
Sizing
Δp
V100
= differential pressure across the fully open valve and the valve’s control path A → AB by a
volume flow V
100
V
100
= volume flow through the fully open valve (H
100
)
Δp
max
= max. permissible differential pressure across the valve’s control path for the entire actuating
range of the motorized valve
100 kPa = 1 bar ≈ 10 mWC
1 m 3 /h = 0.278 l/s water at 20 °C
When sizing valves for media other than water, note that the medium properties
• specific heat
• density
• kinematic
viscosity
differ from water. All variables depend on temperature. The design temperature is the
lowest medium temperature in the valve.
Indication of
operating state
Flow chart
Note for media other
than water