Siemens compact universal controllers User's Manual
Contents
1. Building Technologies HVAC Products To avoid injury to persons damage to property or the environment the following warning notes should be observed Do not open interfere with or modify the controller e All activities mounting installation and service work etc must be performed by qualified staff e When selecting the cables when making the installation and the electrical connec tions observe the regulations of VDE 0100 Erection of power installations with rated voltages below AC 1000 V and the relevant national regulations e Provide double pole isolation of the controller from the mains supply if there is a risk of touching live parts while work is carried out e Check to ensure that wiring is in an orderly state e Fall or shock can adversely affect the safety functions Such units must not be put into operation even if they do not exhibit any damage e Ensure that the relevant national safety regulations are complied with e Please observe the notes given in the user documentation B7865 e Prior to commissioning the plant check to ensure that wiring is in an orderly state Conformity to EEC directives Electromagnetic compatibility EMC immunity 89 336 EEC Electromagnetic compatibility EMC NE21 EN 50 081 part 1 NAMUR recommentation and EN 50 082 part 2 ISO 9001 2000 ISO 14001 1996 Cert 00739 Cert 38233 e For service purposes the controller can be removed from its housing with no need for tools2. 20 mA scalable 1999 9999 4 20 mA scalable 1999 9999 DC 0 10 V scalable 1999 9999 DC 0 1 V scalable 1999 9999 Thermocouples Linearized standard signals 1 Only RWF40 0X2B97 The power provided for the measuring transducers is DC 24 V 30 mA Feeding a signal to analog input 2 the controller s setpoint can be influenced The influence can be scaled The following signals can be used Input signals DC 0 1 V DC 0 10 V 0 20 mA 4 20 mA 1 KQ potentiometer in a 2 wire circuit 7 10 CC1N7865en 01 09 2005 Connection diagram basic diagram Note Legend 8 10 Building Technologies HVAC Products Temperature and pressure control on a dual fuel burner Burner control and supervision are provided by burner control type LAL or LFL DC 24 V at terminals G and G is used for powering the QBE pressure sensor RWF40 i i N Gi M1B9 M9 XB6 M6 Q13 Q14 Y1 Y2 Q D1 GND D2 LAL LFL Rv mye BVIFA BV2FR i 7865a01 1004 RWF40 Y2 Q D1 GND D2 By BV1 A 7865a02 0905 a Limit switch for air damper position OPEN QAE Immersion temperature sensor BS Operation selector QBE Pressure sensor 1 firing on gas RV Gas control damper modulating burner control S1 Internal external setpoint switch E 2 firing on oil SQ Actuator of burner s air damper and gas 2 stage burner cont
3. SIEMENS 7 RWF40 complete with housing Compact RWF40 Universal Controllers The RWF40 is a universal digital boiler temperature pressure controller with functions designed specifically for the control of heat generating plant The RWF40 and this Data Sheet are intended for use by OEMs which integrate the controller in their products Mechanical design The controller is supplied complete with housing for flush panel mounting The RWF 40 is matched to the controlled variable and the required setpoint range by mak ing parameter settings The control parameters can be set and optimized while the burner is running All settings are made with 4 buttons located on the unit front and are directly displayed LEDs on the front indicate the following operating states Control ON OFF Positioning pulses ON or OFF for driving the burner s air damper when using modulating burner control or stage stage II when using 2 stage burner control 2 Stage operating mode Position of the configurable contact K6 Manual control ON OFF During operation the digital display above the LEDs shows the setpoint green the actual value red and when making parameter settings the relevant parameters CC1N7865en Building Technologies 01 09 2005 HVAC Products Warning notes A Mounting notes Installation notes Commissioning notes Standards and certificates Service notes Disposal notes K 2 10
4. e The electrical connections are made via the screw terminals located at the rear of the housing e Each time a unit has been replaced check to ensure that wiring is in an orderly state and that the wires are firmly connected The unit contains electrical and electronic components and must not be disposed of together with household waste Local and currently valid legislation must be observed CC1N7865en 01 09 2005 Type summary Accessories Building Technologies HVAC Products Controller with 3 position output housing fixing material and seal Controller with 3 position output analog output housing fixing material and seal Controller with 3 position output analog output RS 485 port housing fixing material and seal Packaging variants 20 pieces without documentation Adapter frame for replacing the RWF32 Bracket For mounting the RWF40 on 35 mm DIN rails to DIN 46277 Dummy cover For covering a panel cutout for the RWF40 Demo case For demonstrating the functions of the RWF40 controller RWF40 000A97 RWF40 001A97 RWF40 002B97 RWF40 010A97 RWF40 011A97 ARG40 ARG41 AVA10 200 109 KF8892 3 10 CC1N7865en 01 09 2005 Technical data General controller data Environmental conditions 4 10 Building Technologies HVAC Products Mains voltage AC 110 240 V 10 10 Mains frequency 48 63 Hz Safety class Mounting position Terminal
5. elf setting function 3 analog inputs Release of burner Rescate cee gt Relay N O contact for Pt100 Ni100 Pt1000 LG Ni1000 thermocouples or standard signals Floating output Output 2 Relay actuating device open Input 2 External setpoint setpoint shifting for 0 1 KQ resistor or linearized standard signals Output 3 Relay actuating device closed Limit comparator E Output 4 Relay N O contact Power supply measuring transducer 2 binary inputs gt DC 24 V 30 mA contacts Input 3 Outside temperature for Pt1000 LG Ni1000 RWF40 Input 1 Analog output optional Operating mode changeover Output 5 Analog output Input 2 Setpoint shifting changeover DC 0 10 V DC 0 20 mA DC 4 20 mA Serial port optional Power supply RS 485 AC 110 240 V 10 10 MOD bus protocol 48 63 Hz max 10 VA 7865f01 e 0905 5 10 CC1N7865en 01 09 2005 Function of the controller when used for burner control Low fire operation In low fire operation the RWF40 operates like a control thermostat or pressurestat This means that it operates as a 2 position controller maintaining the required setpoint by switching the burner on and off The switching differential for 2 position operation can be adjusted within a wide range If the demand for heat increases the controller switches to high fire operation only when an adjustable limit is exceeded This funct
6. f functions Example Limit value supervision Operation 4 buttons on the unit front are used to operate and program the RWF4O0 During op eration and programming the 7 segment displays show the parameter values and pa rameter names Weather dependent The controller s standard configuration ex works is such that when connecting a setpoint shifting QAC22 outside sensor automatic changeover to weather dependent setpoint shifting takes place A The signal delivered by the QAC2 outside sensor must not be fed parallel to sev eral RWF40 6 10 Building Technologies CC1N7865en HVAC Products 01 09 2005 Function of the controller when used for burner control cont d Analog input 1 actual value sensor Analog input 2 external setpoint shift or external setpoint Building Technologies HVAC Products To acquire the actual value a number of sensors can be connected to the RWF40 2 or 3 wire resistance Pt100 IEC 751 200 850 C 328 41562 F sensors 200 850 C 328 1562 F 60 230 C 76 482 F 60 230 C 76 482 F 50 160 C 58 320 F 200 1372 C 328 2502 F 200 400 C 328 752 F 100 1300 C 148 2372 F FeCuNi type J 200 1000 C 328 1832 F Pt RhPt type S 0 1768 C 32 3214 F 1 Pt RhPt type R 0 1768 C 32 3214 F 7 Pt RhPt type B 0 1820 C 32 3308 F 1 0
7. ion is aimed at optimizing the burner s switching ratio High fire operation In that case the RWF40 operates as a 2 position controller with adjustable switching 2 stage control thresholds Using the relays of the 3 position output the RWF40 drives the actuator to the 1 and 2 output stage In this operating mode the optional analog output switches between the minimum signal for the 1 stage and the maximum output signal for the 2 stage High fire operation In that case the RWF40 operates as a PID PI controller with a 3 position output modulating control without position feedback signals or optionally with a modulating output By making use of its self setting facility the RWF40 is able to determine the PID PI control parameters or the parameters can be set manually Binary input 1 change Using a potential free contact the RWF40 can be switched from the modulating over of operating mode mode to 2 stage operation Binary input 2 setpoint In the case setpoint shifting is configured the current setpoint is shifted by an adjust shifting or setpoint able amount Configuration of setpoint changeover provides changeover between 2 changeover setpoints adjusted on the RWF40 If analog input 2 is configured for an external set point changeover is provided between the setpoint adjusted on the RWF40 and an external setpoint Limit comparator Potential free contact K6 canbe assigned a number o
8. rol control damper BV Fuel valve ST Connections for burner control s start BSG Remote setpoint adjuster active when control loop S1 is closed V Auxiliary switch for the release of the lsa Burner control ord fuel valve depending on the air damper LK Burner s air damper position m MIN Auxiliary switch for controlling low fire Z End switch for the fully CLOSED operation position of the air damper QAC Outside sensor for weather dependent setpoint shifting CC1N7865en 01 09 2005 Dimensions Dimensions in mm OD O Mm O LO CO CO Hf N ARG40 adapter frame 50 3 IO O m 7865m02 0799 7 9 10 Building Technologies CC1N7865en HVAC Products 01 09 2005 Dimensions cont d Dimensions in mm ARG41 CO oS CO i LO m 153 7865m04 1004 2005 Siemens Building Technologies Production GmbH 10 10 Subject to change Building Technologies CC1N7865en HVAC Products 01 09 2005
9. s for Power consumption Safety extra low voltage Contact rating of the control outputs relays K1 K3 Up to 2 x 10 switching cycles Up to 10 switching cycles Weight complete with housing Recommended actuator running time Degree of protection of housing Front Base Storage Temperature range Humidity Transport Temperature range Humidity Operation Temperature range Humidity Condensation formation of ice and ingress of water are not permitted Il to DIN 0631 optional 2 x 1 5 mm or 1 x 2 5 mm max 10 VA DC 24 V 2 A AC 24 240 V 0 1 A AC 24 240 V approx 760 g 15 60 s IP 65 EN 60529 IP 20 EN 60529 DIN EN 60 721 3 1 20 60 C lt 75 r h 40 70 C lt 75 r h 20 50 C lt 75 r h CC1N7865en 01 09 2005 Function Block structure Building Technologies HVAC Products The RWF40 provides the following functions One digital PID controller with a 3 position or analog output optional To control 2 stage burners the RWF40 can be switched over to provide 2 position control Automatic thermostat or pressurestat function in low fire operation One shift controller for weather dependent setpoint shifting One minimum limiter and one maximum limiter for the boiler temperature or the boiler pressure One limit thermostat to DIN 3440 output 1 One potential free configurable contact Manual operating mode Communication via serial port option S
Download Pdf Manuals
Related Search