User Manual

ManualsBrandsSiemens ManualsMetering devicesControl and Heating Cost Allocation valv WRV81...

Siemens Building Technologies CE1N2821E / 29.11.1998

Landis & Staefa Division 1/8

821

SYNERGYR

Control and Heating

Cost Allocation Valve

WRV81...

with local acquisition of the flow temperature

Electronic metering, control and regulating unit. Controls the room temperature

through regulation of a valve, measures the flow rate and the temperature differ-

ential, calculates the amount of thermal energy drawn from the network, acquires

pulses from non-SYNERGYR meters, stores data, and communicates with other

SYNERGYR units via building bus.

The control and heating cost allocation valve WRV81... is a component of the

SYNERGYR Control & Metering System. For field of use of the system, refer to data

sheet 2800.

•

Control of the reference room temperature with a room unit QAW...

•

Acquisition of thermal energy consumption of each apartment

•

Limitation of flow rate to an adjustable level

•

Suppression of hydraulic creep

•

Acquisition of pulses from a non-SYNERGYR meter

•

Display of:

–

current meter reading of thermal energy consumption

–

current flow rate

–

check number

–

errors and faults

–

incoming pulses

•

Detection of alarms and faults and passing them on to the central unit

•

Periodic actuation of the valve in the summer (valve kick)

•

Transmission of all relevant data to the central unit

Description Typ reference

Control and heating cost allocation valve

Nominal flow rate 200 l/h

Nominal flow rate 400 l/h

Nominal flow rate 750 l/h

Nominal flow rate 1500 l/h

WRV81.200

WRV81.400

WRV81.750

WRV81.1500

Use

Functions

Type summary

Summary of content (8 pages)

PAGE 1
2 821 SYNERGYR® Control and Heating Cost Allocation Valve WRV81... with local acquisition of the flow temperature Electronic metering, control and regulating unit. Controls the room temperature through regulation of a valve, measures the flow rate and the temperature differential, calculates the amount of thermal energy drawn from the network, acquires pulses from non-SYNERGYR meters, stores data, and communicates with other SYNERGYR units via building bus.
PAGE 2
Ordering Equipment combinations 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“.
PAGE 3
will be observed in such a situation, suppression of hydraulic creep is activated. It closes the valve for eight minutes. If, after the subsequent test openings, the limit values are adhered to, the valve will resume normal control operation. Storage The thermal energy consumption values are stored in non-volatile memory.
PAGE 4
The valve consists of valve body, orifice and valve plug. The plug has two different diameters 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 (position indication 0) (position indication 1) Flow temperature sensor 1 Diaphragm measuring system 2 3 Orifice Two-stage valve plug Valve fully open (position indication 2) The sensor acquires the medium temperature with a sensing element made of nickel.
PAGE 5
The connection terminals are of the clamping type. The control and heating cost allocation valve has a ready connected 7-wire cable of 1 m. It establishes the electrical connection to the conduit box. Conduit box ALW30 Sizing WRV81.200 WRV81.400 WRV81.750 WRV81.
PAGE 6
Circulating pump • When the heating zone pump runs and all valves are shut, and with no pressure regulation at the end of the pipe, the flow pipe has to absorb the full pump pressure without producing any pump head. To avoid damage to the WRV81... in this situation, the circulating pumps need to be appropriately sized: at a flow rate of 0 m3, the pump head of the heating zone pump must not exceed 0.
PAGE 7
Technical data General data Specific flow values Operating voltage (safety extra low voltage to EN 60730) Frequency Power consumption Degree of protection to EN 60529 Safety class to EN 60730 Electromagnetic compatibility Immunity Emissions Perm. ambient temperatures Operation Transport and storage Mounting length Connecting thread Fittings (ALG81) Length of connecting cable to the conduit box to the flow temperature sensor to terminal P1 (pulse source) Weight Max. flow temperature Min.
PAGE 8
Application example BUS B2 X1 E2 B1 B2 E1 E2 X1 Y1 Y2 Y3 Y4 Y5 B1 Y2 Y5 E1 Y4 E2 Y3 2821S01 Y2 Y3 Y1 Flow temperature sensor Room unit QAW... Radiator in the reference room of the apartment Radiator in another room of the apartment Conduit box ALW30 Control and heating cost allocation valve WRV81... Shutoff valve Thermostatic radiator valve Manual valve (without thermostatic radiator valve) Throttle (sealable) Dimensions 155 1 17,5 0 137,5 2 30 2821M01 110 Minimum clearance: = min.