User Manual

ManualsBrandsSiemens ManualsMetering devicesControl and Heating Cost Allocation Valv WRV84...

Siemens Building Technologies CE1N2824E / 29.11.1998

Landis & Staefa Division 1/8

824

SYNERGYR

Control and Heating Cost Allocation

Valve for individual Room Control

WRV84...

with local acquisition of the flow temperature

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

through regulation of an additional valve. Provides central night setback during

non-occupancy times. 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.

The control and heating cost allocation valve WRV84... is a component of the

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

data sheet 2800.

•

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

times through regulation of a zone valve driven by an electrothermal actuator; during

occupancy times, the WRV84... remains open

•

Control of the reference room temperature with a room unit QAW... during non-

occupancy times through regulation of the valve of the WRV84... (central night set-

back)

•

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 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

Use

Functions

Summary of content (8 pages)

PAGE 1
2 824 SYNERGYR® Control and Heating Cost Allocation Valve for individual Room Control WRV84... with local acquisition of the flow temperature Electronic metering, control and regulating unit. Controls the room temperature through regulation of an additional valve. Provides central night setback during non-occupancy times. Measures the flow rate and the temperature differential, calculates the amount of thermal energy drawn from the network.
PAGE 2
Type summary Description Type reference Control and heating cost allocation valve with a nominal flow rate of 200 l/h with a nominal flow rate of 400 l/h with a nominal flow rate of 750 l/h with a nominal flow rate of 1500 l/h WRV84.200 WRV84.400 WRV84.750 WRV84.1500 Mounting kit ALG81 Conduit box for WRV84... ALW84 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.
PAGE 3
Determination of thermal energy consumption Measurement of thermal energy consumption 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 has an orifice, a two-stage valve plug and a measuring system with a diaphragm.
PAGE 4
the valve, for communication to the billing agency. If errors or faults occur, an appropriate error code is displayed. Parameter settings and addressing At the side of the valve, there is a socket for an address plug and a service interface. With the address plug, a number is assigned to the control and heating cost allocation vale when commissioning the plant. The service interface is required for connecting the service unit AZW30.
PAGE 5
The terminal block is designed as follows: – Five connection terminals each of which can accept four wires (1.5 mm2), which are then galvanically interconnected – Three connection terminals each of which can accept two wires (1.5 mm2), which are then galvanically interconnected The connection terminals are of the clamping type. The control and heating cost allocation valve has a ready connected 8-wire cable of 1 m. It establishes the electrical connection to the conduit box.
PAGE 6
Control and heating cost allocation valve Since the WRV84... operates with a variable measurement range, the pressure drop across the valve should never exceed 0.12 bar (WRV84.1500: 0.15 bar). The surplus pressure must be reduced by a throttle mounted upstream of the valve. 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 must absorb the full pump pressure without producing any pump head.
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 conduit box to the flow temperature sensor to terminal P1 (pulse source) Weight Max. flow temperature Min. flow temperature Max.
PAGE 8
Application example B2 BUS X1 K1 B3 E1 B1 B2 B3 E1 E2 K1 X1 Y1 Y2 Y3 Y4 Y2 B1 Y2 Y3 M Y4 E2 M Y4 Y4 2824S01 M B3 E2 Y1 Flow temperature sensor of WRV84... Room unit QAW... Room thermostat RAD9... Underfloor heating system in the apartment's reference room Underfloor heating system in the other rooms of the apartment Control module AEK84 Conduit box ALW84 Control and heating cost allocation valve WRV84... Shutoff valve Throttle (sealable) Zone valve with electrothermal actuator STE21.