User Manual

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Siemens Building Technologies Product data sheet WFT10 CE1N5440E
Landis & Staefa Division 07.07.1999
Functions
•
Continuous registration of flow speed, flow duration, flow volume and of the tem-
perature
•
Comparison of these control criteria with the set limits
•
If the limits are exceeded, an alarm is set off and the supply is disrupted
•
Alarm is also triggerable by signal from external sensor
•
Display of current flow values
•
Display of current warning or alarm
•
Day / night mode
•
Normal operation / holiday mode
•
Deactivation option
Typenübersicht
Nominal Flow Length Model Number
1.5 m
3
/h 265 mm
WFT10.D12S
2.5 m
3
/h 285 mm
WFT10.E13S
Orders
When ordering, please indicate the model number according to the above table.
WATERBRAKE is delivered as a completely preassembled system. Included in the
WFT10 package are the following system components as well as their connections:
•
Volume Detector:
−
Volume detector with temperature sensor
−
Two 1" internal thread screw connections
−
Preinstalled 1.5 m control line
•
Control Unit:
−
Control unit
−
Two PG11 cable glands
−
Five PG7 cable glands
•
Shutoff Valve
−
Shutoff valve
−
Preinstalled 1.5 m power cord
−
Preinstalled 1.5 m control line
−
Two PG11 cable glands
Technology
The volume detector transmits the registered data via an access line to the control unit.
This compares the current data with the set limits. If a limit is exceeded or an alarm is
set off by an external device, the shutoff valve disrupts the water supply.
WFT10 is purely a monitoring device. Calibration is not required; therefore small devia-
tions compared with calibrated meters are not to be considered errors.
The water flow drives an impeller whose speed is monitored electronically (no magnetic
field generated).
The temperature is measured by a temperature sensor.
A microprocessor in the control unit evaluates the flow volume and the current flow rate
on the basis of flow speed and flow duration, determined by means of an internal clock.
This data and the temperature data is constantly compared with the set limits. If 80 %
of a set maximum value (or 3K above minimum temperature) is reached, a warning is
shown in the display. Optionally, this warning can also be emitted by an external war-
Contents
Volume Detector
Control Unit