User Manual

CE1N2821E / 29.11.1998 Siemens Building Technologies
2/8 Landis & Staefa Division
Mounting kit
ALG81
Conduit box for WRV81...
ALW30
Set of address plugs for address numbers 1...16
PTG1.16
Set of address plugs for address numbers 1...32
PTG1.32
Set of address plugs for address numbers 33...64
PTG1.64
Set of address plugs for address numbers 65...96
PTG1.96
Set of address plugs for address numbers 97...128
PTG1.128
When ordering, please give type reference of the control and heating cost allocation
valve according to “Type summary“.
The delivery comprises:
–
The control and heating cost allocation valve
–
A set of address plugs
–
A conduit box
–
A mounting kit, consisting of:
– adapter piece
– fittings
– protection pocket
– welding sleeve for the protection pocket
The initial delivery includes the conduit box and the mounting kit. The control and heat-
ing cost allocation valve along with the address plugs are delivered when the plant is
commissioned.
Commissioning by Landis & Staefa staff includes:
–
Delivery and installation of the control and heating cost allocation valve
–
Delivery and setting of the address plugs
–
Parameter settings of the whole SYNERGYR plant
–
Sealing the units
Each apartment requires one control and heating cost allocation valve WRV81..., a
maximum of two pulse adapters AEW2.1, and one room unit QAW10 or QAW20.
For more information about the system structure, refer to data sheet 2800 and the data
sheets of the individual units.
The control and heating cost allocation valve features a two-position controller which
provides control similar to PID.
In the reference room, the room unit acquires the room temperature and passes it on to
the controller integrated in the WRV81.... In the other rooms, room temperature control
is ensured by thermostatic radiator valves.
To determine the amount of thermal energy consumed, the control and heating cost
allocation valve measures the flow temperature, the return temperature and the flow
rate.
The return temperature sensor is integrated in the valve body.
The flow rate is determined based on the effective pressure principle. For this purpose,
the valve features an orifice, a two-stage valve plug and a diaphragm measuring sys-
tem. The two-stage valve plug is used to change the measurement range in function of
the effective pressure.
If the flow rate or the temperature differential falls below the respective low limit value,
the actual heat demand of the apartment has dropped below the acquisition limit of the
control and heating cost allocation valve. To make certain the guaranteed error limits
Ordering
Equipment
combinations
Technical design
Room temperature
control
Determination of thermal
energy consumption
Measurement of thermal
energy consumption
Suppression of hydraulic
creep