User Manual

CE1N2822E / 29.11.1998 Siemens Building Technologies
4/8 Landis & Staefa Division
The valve's travel is generated by an electric motor which drives an eccentric disk
through a geartrain.
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.
Valve fully closed Valve in mid-position Valve fully open
(position indication 0) (position indication 1) (position indication 2)
1 Diaphragm measuring system
2 Orifice
3 Two-stage valve plug
To facilitate installation of the valve when commissioning 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.
The conduit box ALW30 consists of base, terminal block and cover. The overall dimen-
sions 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
The connection terminals are of the clamping type.
The control and heating cost allocation valve features a ready connected 7-wire cable of
1 m. It establishes the electrical connection to the conduit box.
Conduit box ALW30
Actuator and valve
Accessories
Adapter piece for
premounting
Conduit box