User Manual

CE1N2821E / 29.11.1998 Siemens Building Technologies
4/8 Landis & Staefa Division
The valve consists of valve body, orifice and valve plug. The plug has two different di-
ameters and is appropriately positioned in the orifice by the actuator. The position of the
valve plug is displayed.
1 Diaphragm measuring
system
2 Orifice
3 Two-stage valve plug
Valve fully closed Valve in mid-position Valve fully open
(position indication 0) (position indication 1) (position indication 2)
The sensor acquires the medium temperature with a sensing element made of nickel.
The sensing element is located at the end of an immersion rod which is inserted in the
protection pocket and then secured by a sealable adjusting screw. The connecting cable
is 1.5 m long and is ready fitted to the control and heating cost allocation valve.
To facilitate installation of the control and heating cost allocation valve when commis-
sioning the plant, there is an adapter piece available. It has the same dimensions as the
valve (110 mm long and threaded connections of 1").
The adapter piece must be fitted when laying the piping.
To mount the flow temperature sensor, a 3/8" sleeve and a protection pocket are re-
quired. The sleeve is welded into the pipe which then accommodates the protection
pocket.
2
1
3
4
Mounting the flow temperature sensor
1 Sensor with connecting cable
2 Sealable adjusting screw
3 Protection pocket
4 Sleeve
The conduit box consists of base, terminal block and cover. The overall dimensions are
the same as those of the pulse adapter AEW2.1 (refer to data sheet 2831).
The base has three holes for fitting the box to the wall. DIN rail mounting is made possi-
ble by a snap-on facility at the rear.
For wiring, there are:
–
Three knockout holes for cable glands Pg11 or plastic grommets on the underside
–
Five knockout holes at the rear when using a recessed conduit box
The terminal block is designed as follows:
–
Five connection terminals each of which can accept four wires (1.5 mm
2
) which are
then galvanically interconnected
–
Two connection terminals each of which can accept two wires (1.5 mm
2
) which are
then galvanically interconnected
Flow temperature
sensor
Accessories
Adapter piece for
premounting
Detector accessories
Conduit box