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Siemens RVD230 Basic Documentation

District heating and domestic hot water controller
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RVD230
District Heating and Domestic Hot Water Controller
Basic Documentation
Edition 3.0
Controller series D
Siemens Building Technologies
CE1P2383en
HVAC Products
27.05.2004

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Summary of Contents for Siemens RVD230

  • Page 1 RVD230 District Heating and Domestic Hot Water Controller Basic Documentation Edition 3.0 Controller series D Siemens Building Technologies CE1P2383en HVAC Products 27.05.2004...
  • Page 2 Siemens Building Technologies AG © 2000 Siemens Building Technologies AG HVAC Products Subject to change Gubelstrasse 22 CH 6301 Zug Tel. +41 41 724 24 24 Fax +41 41 724 35 22 www.landisstaefa.com 2/130 Siemens Building Technologies Basic Documentation RVD230...

  • Page 3: Table Of Contents

    Room temperature (A6) ................. 25 4.4.1 Types of sensors ................... 25 4.4.2 Handling faults....................25 4.4.3 Room model ....................25 D.h.w. flow temperature (B3 and B12) ............25 3/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products Contents 27.05.2004...
  • Page 4 Function block Display of actual sensor values ..........33 Operating lines....................33 Displays ......................33 Function block Holiday settings ..............34 Operating lines....................34 Holiday program.....................34 Function block Indication of errors ..............35 10.1 Operating line....................35 4/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products Contents 27.05.2004...
  • Page 5 Room model temperature................50 12.9.5 Optimum stop control ..................51 12.9.6 Quick setback ....................51 12.9.7 Optimum start control ..................51 12.9.8 Maximum rate of flow temperature increase ..........52 5/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products Contents 27.05.2004...
  • Page 6 Release of d.h.w. heating ................62 16.3 Control of the circulating pump ..............63 16.4 Switching differential of d.h.w. control............63 16.5 Legionella function ..................63 16.6 Priority of d.h.w. heating ................63 16.6.1 General ......................63 6/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products Contents 27.05.2004...
  • Page 7 Legionella function..................74 18.1.2 Setpoint ......................74 18.1.3 Time....................... 74 18.1.4 Dwelling time ....................74 18.1.5 Operation of circulating pump................ 75 18.1.6 Maximum limitation of the return temperature ..........75 7/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products Contents 27.05.2004...
  • Page 8 23.3.1 Principle ......................85 23.3.2 Mode of operation with outside sensor ............85 23.3.3 Mode of operation without outside sensor .............86 23.3.4 Frost protection for the heating circuit flow ............86 8/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products Contents 27.05.2004...
  • Page 9 Maximum limitation of the temperature differential (DRT function) ....98 27.4.1 Mode of operation..................98 27.4.2 Purpose ......................98 27.5 Integral action time of the limitation functions..........99 9/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products Contents 27.05.2004...
  • Page 10 General ......................105 30.3.2 Overriding the operating mode ..............106 30.3.3 Knob for readjusting the room temperature ..........106 30.3.4 Effects of the individual QAW70 operating lines on the RVD230 ....106 30.3.5 Controller with operation lock...............107 30.3.6 Entry of holiday periods ................107 30.4 Room temperature sensor QAA10...............107...
  • Page 11 33.5 Connection diagrams................... 115 33.5.1 Low-voltage side..................115 33.5.2 Mains voltage side..................115 Mechanical design..................116 34.1 Basic design ....................116 34.2 Dimensions....................116 Technical data ..................... 117 11/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products Contents 27.05.2004...
  • Page 12 D.h.w. heating Term Explanation Coil type storage tank Instantaneous d.h.w. heating (via heat exchanger) Stratification storage tank Storage tanks Common term used for coil type and stratification storage tanks. 12/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products Glossary 27.05.2004...

  • Page 13: Summary

    2-stage separation of the d.h.w. from district heating − • The RVD230 is suited for the control of 2-port and 3-port valves as well as diverting valves and pumps, including variable speed pumps • For the direct adjustment of the nominal room temperature setpoint, a setting knob is available.

  • Page 14: Suitable Room Units

    Communication with other devices, controllers, etc., is possible: • Via LPB, e.g. assignment of d.h.w., reception of radio signal, master / slave assign- ments for the time switch, reception of heat demand signals (RVD230 used as a pri- mary controller, reception of outside temperature signal) •...

  • Page 15: Use

    Types of plant Basically, the RVD230 is suited for the control of all types of heating plants in houses or buildings • that are connected to a district heat network • in which the flow temperature of the heating circuit is controlled either weather- or room temperature-compensated •...

  • Page 16: Functions

    • Remote operation via room unit D.h.w. functions The RVD230 is used if one or several of the following d.h.w. functions is / are required: • Common or separate heat exchangers for the heating circuit and for d.h.w. heating • D.h.w. heating with a coil type storage tank, with charging pump or diverting valve •...

  • Page 17: Fundamentals

    3.1.2 Plant types The RVD230 has 28 plant types preprogrammed, whereby the functions required for each type of plant are ready assigned. When commissioning the installation, the rele- vant plant type must be selected. Each plant type is comprised of a heating circuit and a d.h.w. circuit. When making use of all possible or practical combinations, the above mentioned total of 28 plant types are available.
  • Page 18 2-port valve d.h.w. primary return a) Circulating pump feeding water into the heat exchanger’s return Suppression of hydraulic creep b) Circulating pump feeding water into the storage tank 18/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 3 Fundamentals 27.05.2004...
  • Page 19 Mixing valve d.h.w. circuit a) Circulating pump feeding water into the heat exchanger’s return Suppression of hydraulic creep b) Circulating pump feeding water into the storage tank 19/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 3 Fundamentals 27.05.2004...
  • Page 20 Mixing valve heating circuit a) Circulating pump feeding water into the heat exchanger’s return Suppression of hydraulic creep b) Circulating pump feeding water into the storage tank 20/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 3 Fundamentals 27.05.2004...
  • Page 21 2-port valve d.h.w. circuit primary return a) Circulating pump feeding water into the heat exchanger’s return Suppression of hydraulic creep b) Circulating pump feeding water into the storage tank 21/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 3 Fundamentals 27.05.2004...
  • Page 22 Mixing valve heating circuit a) Circulating pump feeding water into the heat exchanger’s return Suppression of hydraulic creep b) Circulating pump feeding water into the storage tank 22/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 3 Fundamentals 27.05.2004...

  • Page 23: Operating Modes

    Circulating pump feeding water into the storage tank Operating modes 3.2.1 Heating circuit control The RVD230 offers the following operating modes: Automatic operation • Automatic heating operation, changeover between nominal room tempera- ture and reduced room temperature according to the time program •...

  • Page 24: Acquisition Of Measured Values

    • Strap-on temperature sensor QAD22 • Immersion temperature sensors QAE2… When the RVD230 is used as a primary controller (all plant types 5–x and 6–x as well as 7–2), the measured value of flow sensor B1 is passed on and distributed via LPB.

  • Page 25: Room Temperature (A6)

    4.4.3 Room model The RVD230 uses a room model that is ready integrated in the controller. It simulates the room temperature based on the progression of the outside temperature and the type of building construction, using a defined attenuation. In plants with no room tem- perature acquisition, the room model ensures optimum start control.

  • Page 26: Handling Faults

    All types of sensors from Siemens with a sensing element LG-Ni 1000. Suited for − d.h.w. applications is the immersion temperature sensor QAE2… Its range of use is 0…130 °C Commercially available sensors using a sensing element Pt 500 Its sensing range −...

  • Page 27: Storage Tank Or Return Temperature (B32)

    Types of sensors The following types of sensors can be used: • All types of sensors from Siemens with a sensing element LG-Ni 1000. Suited for d.h.w. applications is immersion temperature sensor QAE2… . Its range of use is 0…130 °C •...

  • Page 28: Secondary Return Temperature (B7 And B71)

    Types of sensors The following types of sensors can be used: • All types of sensors from Siemens with a sensing element LG-Ni 1000. Suited for d.h.w. applications is the immersion temperature sensor QAE2… . Its range of use is 0…130 °C...

  • Page 29: Function Block Space Heating

    QAW70 room unit. For more detailed information, refer to chapter 9 "Function block Holiday settings" (operating lines 31…33) and section 30.3 “Combination with room unit QAW70" 29/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 5 Function block Space heating 27.05.2004...

  • Page 30: Heating Program

    Heating program The heating program of the RVD230 provides a maximum of 3 heating periods per day; also, every weekday can have different heating periods. Every heating period is defined by a start and an end time.

  • Page 31: Function Block Clock Settings

    1995…2094 Entries The RVD230 has a yearly clock with the time of day, weekday and date. The changeover from summer- to wintertime, and vice versa, takes place automatically. Should the respective regulations change, the changeover dates can be adjusted (refer to operating lines 144 and 145).

  • Page 32: Function Block End-User D.h.w

    8… Normal setpoint D.h.w. heating program The d.h.w. heating program of the RVD230 provides a maximum of 3 release periods per day; also, every weekday can have different release periods. Every release period is defined by a start and an end time.

  • Page 33: Function Block Display Of Actual Sensor Values

    The temperature displayed is that measured with sensor B12 Plant types 0–x: − No display If button is pressed, the controller will display the current setpoint 33/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 8 Function block Display of actual sensor values 27.05.2004...

  • Page 34: Function Block Holiday Settings

    125 (assignment of d.h.w.), the holiday function will switch off d.h.w. heating and the circulating pump. The holiday program is only active in AUTO mode. 34/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 9 Function block Holiday settings 27.05.2004...

  • Page 35: Function Block Indication Of Errors

    * If maximum limitation of the secondary return temperature is activated (by making an entry on operating line 177; lowering against the primary limit value), no error mes- sage will be generated 35/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 10 Function block Indication of errors 27.05.2004...

  • Page 36: Function Block Plant Configuration

    The type of plant is to be entered on operating line 51. The plant types have the following features: • The RVD230 has a total of 28 plant types preprogrammed. For detailed information, refer to subsection 3.1.2 "Plant types" • Plant types 0–4 through 0–10 are used exclusively for d.h.w. heating; they cannot be used for heating circuit control or precontrol •...

  • Page 37: Circulating Pump

    • Setting 2: The RVD230 can receive a DC 0…10 V signal from a plant element and then pass it on via M-bus. Plant element can be a differential pressure sensor, for in- stance. The signal has no impact on the control functions of the RVD230 •...
  • Page 38 –10 °C (no more spare capacity for heating up processes). At this outside temperature, both the pump speed and the flow temperature are at their ma- ximum 38/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 11 Function block Plant configuration 27.05.2004...
  • Page 39 * Setting value operating line 176 ** Setting value operating line 177 39/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 11 Function block Plant configuration 27.05.2004...
  • Page 40 The following setpoints and actual values are used: Plant type Actual value (sensor) Setpoint x–6, 3–7, x–8, x–12 B3 Current d.h.w. setpoint Current d.h.w. setpoint 2–7, 6–7, x–10 40/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 11 Function block Plant configuration 27.05.2004...

  • Page 41: Function Block Space Heating

    0 / 1 12.2 Compensating variables 12.2.1 Outside temperature The RVD230 makes use of 3 types of outside temperatures: • The actual outside temperature (T • The composite outside temperature (T ). It is generated by filtering the actual outside temperature by the building time constant.

  • Page 42: Room Temperature

    Setpoint minus actual value (room temperature) The setpoint change ∆w is calculated in the static state according to the following formula: Room influence factor E ∆w × (w 42/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 12 Function block Space heating 27.05.2004...

  • Page 43: Heating Curve

    The use of a substitute line is required because the heating curve is slightly deflected. This is necessary to compensate for the non-linear radiation characteristics of the dif- ferent types of radiators. 43/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 12 Function block Space heating 27.05.2004...

  • Page 44: Generation Of Setpoint

    – if the RVD230 is also used for precontrol – of the external heat demand. The heat demand of the heating circuit is determined either by weather-compensation, weather-compensation with room temperature influence or room temperature compen- sation.

  • Page 45: Setpoint Of Room-Compensated Control

    Heating curve slope Operating line 70 Adjustment of gain factor of room influence Composite outside Operating line 71 Adjustment of parallel displacement of heating temperature curve 45/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 12 Function block Space heating 27.05.2004...

  • Page 46: Heating Circuit Control

    The flow temperature setpoint is continuously shifted via the heating curve by the com- posite outside temperature. In addition, any deviation of the room temperature pro- 46/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 12 Function block Space heating...

  • Page 47: Automatic Eco Function

    Manual operation Inactive In the case of the RVD230, the automatic ECO function performs 2 part functions. ECO function 1 is used primarily in the summer, ECO function 2 responds mainly to short- term temperature changes and, therefore, is active during intermediate seasons.

  • Page 48: Heating Limit

    (sensor or room unit). The limit value is generated from the nominal room temperature setpoint plus the value entered on operating line 73. 48/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 12 Function block Space heating 27.05.2004...

  • Page 49: Optimization

    • Quick setback. Optimization operates with fixed values (no learning process), based on the set maximum heating up time and the room model 49/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 12 Function block Space heating 27.05.2004...

  • Page 50: Process

    To ascertain the room temperature generated by the room model, a distinction must be made between 2 cases: • The RVD230 is not in the quick setback mode: The room temperature generated by the room model is identical to the current room temperature setpoint •...

  • Page 51: Optimum Stop Control

    12.9.5 Optimum stop control During the building's occupancy time, the RVD230 maintains the setpoint of normal heating. Towards the end of the occupancy time, the control switches to the reduced setpoint. Optimization calculates the changeover time such that, at the end of occu- pancy, the room temperature will be 0.5 °C lower than the setpoint of normal heating...

  • Page 52: Maximum Rate Of Flow Temperature Increase

    1 K. With the room temperature sensor, frost protection for the building has priority over the ECO function. 52/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 12 Function block Space heating 27.05.2004...

  • Page 53: Mode Of Operation Without Room Sensor

    7.5 °C, the pump in the heating circuit flow will be shut down. It starts running again after the flow temperature has dropped below the limit value. Shutdown of the pump is not a safety function! 53/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 12 Function block Space heating 27.05.2004...

  • Page 54: Precontrol

    13.1 General The RVD230 can be configured as a primary controller. Primary controller plant types are 5–x, 6–x and 7–2. The other plant types do not control their flow temperature ac- cording to the heat demand signals they receive via LPB because their controllers are configured as consumers.

  • Page 55: Frost Protection

    • Entry of holiday data By contrast, the following functions will be maintained: • Maximum limitation of the primary return temperature • Maximum limitation of the temperature differential 55/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 13 Precontrol 27.05.2004...

  • Page 56: Room Unit

    B12 will be displayed. Display of the temperature of the precontrolled flow (sensor B1) with a room unit is not possible. 56/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 13 Precontrol...

  • Page 57: Function Block Valve Actuator Heat Converter / Primary Controller

    Maximum limitation is not a safety function; for that purpose, a thermostat, thermal reset limit thermostat or similar must be used. 57/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 14 Function block Valve actuator heat converter / primary controller...

  • Page 58: Minimum Limitation Of The Flow Temperature

    14.6 External heat demand at input H5 Heat demand signals can be fed to the RVD230 via digital input H5. When there is a demand for heat, the contact closes. This facilitates manual remote control of the con- trolled setpoint, for instance.
  • Page 59 DC 10 V 80 °C 130 °C The controller considers signals below DC 0.4 V as no heat demand signals. 59/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 14 Function block Valve actuator heat converter / primary controller 27.05.2004...

  • Page 60: Function Block Valve Actuator Heating Circuit

    (also refer to subsection 12.11.3 "Shutdown of pump"). Maximum limitation of the flow temperature also acts in the case of plant types 8–4. 60/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 15 Function block Valve actuator heating circuit...

  • Page 61: Minimum Limitation Of The Flow Temperature

    Minimum limitation of the flow temperature also acts in the case of plant type 8–4. This function can be deactivated (entry of --- on operating line 96). 61/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 15 Function block Valve actuator heating circuit...

  • Page 62: Function Block D.h.w. Heating

    • In the case of direct d.h.w. heating via heat exchanger, operating line 109 is inactive. The release of d.h.w. heating is not connected to the operating level of space heating. 62/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 16 Function block D.h.w. heating...

  • Page 63: Control Of The Circulating Pump

    On operating line 106, the controller offers 3 different types of priority: • Absolute priority • Shifting priority • No priority (parallel operation) 63/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 16 Function block D.h.w. heating 27.05.2004...

  • Page 64: Absolute Priority

    With plant types 5–x, 6–x and 7–x, the RVD230 has this consumer master functionality. If there is no consumer master, absolute priority is the same as that with a controller without LPB link.

  • Page 65: No Priority

    With plant types 5–x, 6–x and 7–x, the RVD230 has this consumer master functionality. If there is no consumer master, shifting priority only works the same way as with a controller without LPB link.

  • Page 66: Frost Protection For D.h.w

    • when, in the local heating circuit, the holiday function is active (operating mode button flashes) • when, with the RVD230 as a primary controller, the holiday function is active in the heating circuits of the zone controllers assigned via LPB (operating mode button lit) With all plant types no.

  • Page 67: H.w. Heating

    17.1 D.h.w. heating with storage tanks 17.1.1 General The RVD230 supports the following types of plants: • Plants with coil type storage tanks, where the heating circuit and d.h.w. heating use a common heat exchanger • Plants with stratification storage tanks, where the heating circuit and d.h.w. heating use 2 separate heat exchangers Space heating and d.h.w.

  • Page 68: Protection Against Discharging

    This is achieved by switching off the d.h.w. heating mode. 68/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 17 D.h.w. heating 27.05.2004...

  • Page 69: Heating With Stratification Storage Tank

    D.h.w. heating is terminated when the temperature at the storage tank sensor has reached the d.h.w. setpoint. Both the intermediate circuit and the storage tank charging 69/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 17 D.h.w. heating 27.05.2004...

  • Page 70: Feeding The Circulating Water Into The Heat Exchanger

    There is a risk of cooling down (leading to long waiting times when d.h.w. is needed) when, during longer periods of time, 70/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 17 D.h.w. heating 27.05.2004...

  • Page 71: Siting The Sensors

    17.3.5 Flow switch If desired, a flow switch can be fitted in the heat exchanger’s cold water return. For this purpose, the RVD230 provides digital input H5, which is to be configured on operating line 55. The flow switch improves the control performance of the heat exchanger. It indicates to the control system when a demand for heat can be expected.

  • Page 72: Compensation Of Heat Losses Through Control

    Setting on operating The aim is to maintain the d.h.w. setpoint and all heat losses will be fully compensated line 3 for. A circulating pump is used. 72/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 17 D.h.w. heating 27.05.2004...

  • Page 73: Cold Water Sensor

    When there is a demand for d.h.w., valve Y2 opens until the setpoint at d.h.w. flow sensor B3 is reached. Valve Y1 remains fully closed. If there is a demand for heat from both circuits, the d.h.w. circuit is given priority. 73/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 17 D.h.w. heating 27.05.2004...

  • Page 74: Function Block Extra Legionella Functions

    If the storage tank temperature falls by more than SD + 2 K (switching differential plus 2 K) below the legionella setpoint before the dwelling time has elapsed, the dwelling time must again be completed. 74/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 18 Function block Extra legionella functions 27.05.2004...

  • Page 75: Operation Of Circulating Pump

    The behavior of the legionella function as a function of the d.h.w. temperature is as follows: 75/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 18 Function block Extra legionella functions 27.05.2004...
  • Page 76 The legionella setpoint will not be affected by the maximum of the d.h.w. temperature setpoint. 76/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 18 Function block Extra legionella functions 27.05.2004...

  • Page 77: Function Block Valve Actuator D.h.w

    This takes place independent of whether or not maximum limitation of the d.h.w. return temperature is activated. 77/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 19 Function block Valve actuator d.h.w.

  • Page 78: Setpoint Boost

    The switching differential of the d.h.w. temperature still applies. 78/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 19 Function block Valve actuator d.h.w. 27.05.2004...

  • Page 79: Adjustable Load Limit

    If, within a period of 10 seconds, the d.h.w. tap is opened more than twice, the control- ler will ensure d.h.w. heating without the support of the load limit function. 79/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 19 Function block Valve actuator d.h.w.

  • Page 80: Function Block Assignment Of D.h.w. Heating

    The setting is active only when setting 1 (according to the space heating switching program with forward shift) has been selected on operating line 101 (d.h.w. release). 80/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 20 Function block Assignment of d.h.w. heating...

  • Page 81: Function Block Lpb Parameters

    Depending on the master clock, different sources for the time of day can be used. The source must be entered on the controller on operating line 133, as a digit (0…3): 0 = autonomous clock in the RVD230 1 = time of day from the bus; clock (slave) with no remote readjustment 2 = time of day from the bus;...

  • Page 82: Bus Power Supply

    On each connected device, it is then necessary to set whether the data bus is powered centrally or decentrally by each controller. With the RVD230, this setting is made on operating line 134. The current setting is shown on the left and the current bus power supply status on the right.

  • Page 83: Locking Signals

    "Gain of locking signal" >0 %. The switch-off point depends on the setting "Gain of locking signal" The RVD230 cannot generate critical locking signals since it is not a boiler controller. Plant type x–4 (direct d.h.w. heating) is the only consumer that never responds to criti- cal locking signals.

  • Page 84: Uncritical Locking Signals

    22.3.3 Uncritical locking signals from the data bus Uncritical locking signals from the data bus throttle the heat converters and the heating circuits. 84/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 22 Locking signals 27.05.2004...

  • Page 85: Function Block Device Functions

    23.2 Actuator pulse lock This function acts on all 3-position actuators controlled by the RVD230. If, during a total period of time that equals 5 times the running time, an actuator has received opening or closing pulses, additional closing pulses in the same direction will be suppressed by the controller.

  • Page 86: Mode Of Operation Without Outside Sensor

    Primary controller 5–x, 6–x, 7–2 Common flow 2–x, 3–x Heating circuit controller 1–x Heating circuit 3–x, 7–2 controller D.h.w. controller x–2, x–7, x–8, x–10, 2–12 86/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 23 Function block Device functions 27.05.2004...

  • Page 87: Direct D.h.w. Heating Via Heat Exchanger

    – for a defined period of time during a demand for heat – the flow temperature falls below the flow temperature setpoint by more than 10 K. This period of time can be 87/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 23 Function block Device functions...

  • Page 88: Winter- / Summertime Changeover

    23.6 Pump kick On operating line 146, the pump kick function can be activated or deactivated (refer to section 12.11.1 “Pump kick“). 88/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 23 Function block Device functions 27.05.2004...

  • Page 89: Function Block M-Bus Parameters

    The current d.h.w. setpoint is the nominal setpoint minus the switching differential. The switching differential acts from the new setpoint Setpoint of frost protection The current d.h.w. setpoint is the reduced d.h.w. setpoint 89/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 24 Function block M-bus parameters 27.05.2004...

  • Page 90: Load Management Of The Heating System

    LPB system may be connected to the M-bus! 24.5.5 Resolution of M-bus signals Signal Resolution Water temperatures 1.0 °C Air temperatures 0.1 °C Voltage at DC 0…10 V input 0.1 V 90/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 24 Function block M-bus parameters 27.05.2004...

  • Page 91: Function Block Pps Parameters

    No device present The example given in the above table uses address 1. Room units QAW50.3 and QAW70 with software version 1.20 or higher are addressable. 91/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 25 Function block PPS parameters 27.05.2004...

  • Page 92: Function Block Test And Display

    D.h.w. flow temperature Room temperature Return temperature Return temperature Return temperature Storage tanks Storage tanks Heating circuit or d.h.w. flow – (Not available) 92/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 26 Function block Test and display 27.05.2004...

  • Page 93: Relay Test

    26.4 Relay test The relay test is used to manually energize each relay contained in the RVD230 in order to check its status. The relays are energized by pressing the setting buttons Each relay is assigned a code:...

  • Page 94: Limitations

    Radio clock receiver If a radio clock receiver is connected to the data bus, the RVD230 can receive the radio signals via data bus. On operating line 165, it is possible to see how much time has elapsed (hh:mm) since the radio clock receiver received the last correct time telegram.

  • Page 95: Function Block Drt And Maximum Limitation Of The Return Temperature

    Maximum limitation acts on both the heating circuit and the d.h.w. circuit; both consum- ers have their own limit value. 95/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 27 Function block DRT and maximum limitation of the return temperature...

  • Page 96: Maximum Limitation In Heating Mode

    • If the outside temperature falls further, the return temperature will be limited to the upper constant value 96/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 27 Function block DRT and maximum limitation of the return temperature 27.05.2004...

  • Page 97: Maximum Limitation In D.h.w. Heating Mode

    172) line 172…177) With shifting compensation ** Equation according to subsection "27.2.2 "Maximum limitation in heating mode " 97/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 27 Function block DRT and maximum limitation of the return temperature 27.05.2004...

  • Page 98: Maximum Limitation Of The Temperature Differential (Drt Function)

    During d.h.w. heating cycles, maximum limitation of the temperature differential is deac- tivated with all types of plant. 98/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 27 Function block DRT and maximum limitation of the return temperature 27.05.2004...

  • Page 99: Integral Action Time Of The Limitation Functions

    With this setting (on operating line 178), the impact of the limitation function can be matched to the type of plant. 99/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 27 Function block DRT and maximum limitation of the return temperature...

  • Page 100: Function Block Miscellaneous

    28.2 Limitation function at contact H5 Input H5 at the RVD230 can be configured for the reception of energy and / or volumet- ric flow pulses from heat meters (entry on operating line 55 must be 1). These pulses activate a limit function in the controller.

  • Page 101: Suppression Of Hydraulic Creep

    The setting range is 0…10; the effective value is 10 times smaller. The temperature used is the composite outside temperature. The function can be deactivated (by entering 0 for the slope). 101/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 28 Function block Miscellaneous 27.05.2004...
  • Page 102 Effect or slope (operating line 190) Composite outside temperature Reduced room temperature setpoint Start of compensation (operating line 189) 102/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 28 Function block Miscellaneous 27.05.2004...

  • Page 103: Function Block Operation Locking Functions

    B31–M have been linked. For details on access to the locking functions level, refer to subsection 32.1.6 "Setting levels and access rights". 103/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 29 Function block Operation locking functions 27.05.2004...

  • Page 104: Combination With Pps Devices

    70 must be set to 0. The other room unit functions will then be main- tained • If an inadmissible unit is connected, the RVD230 identifies a fault. A room unit will be switched to the passive state; this means that all entries made on the room unit will have no impact •...

  • Page 105: Knob For Room Temperature Readjustments

    Room unit QAW70, with room temperature sensor, time switch, setpoint adjustment, knob for room temperature setpoint readjustments and economy button. Using the QAW70, the following functions can be performed or actions on the RVD230 achieved: • Overriding the operating mode •...

  • Page 106: Overriding The Operating Mode

    Using the knob of the QAW70, the nominal room temperature setpoint can be read- justed by a maximum of ±3 °C. The adjustment of the room temperature setpoint on the RVD230 will not be affected by the QAW70. 30.3.4 Effects of the individual QAW70 operating lines on the RVD230 Op.

  • Page 107: Controller With Operation Lock

    Room sensor QAA10 can be used in place of a room unit. The QAA10 acquires the room temperature with an NTC sensing element; its sensing range is 0…32 °C. 107/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 30 Combination with PPS devices 27.05.2004...

  • Page 108: Manual Operation

    The manual operation status can be ascertained but not changed via LPB. In any case, a heat demand signal of 95 °C (fixed value) is delivered to the heat source. 108/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 31 Manual operation...

  • Page 109: Handling

    Handling 32.1 Operation 32.1.1 General Operating elements Front of the RVD230 Operating mode buttons for selecting the operating mode Display Line selection buttons for selecting operating lines Button and indication (LED) for manual operation ON / OFF Button for d.h.w. heating ON / OFF...

  • Page 110: Analog Operating Elements

    Procedure Effect Keep depressed and press Selection of the next higher function block Keep depressed and press Selection of the next lower function block 110/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 32 Handling 27.05.2004...

  • Page 111: Controller In "Nonoperated State

    Commissioning 32.2.1 Installation instructions The RVD230 is supplied with installation instructions which contain detailed descrip- tions of mounting and wiring and commissioning with functional checks and settings. They have been written for trained specialists. Each operating line has an empty field in which the selected value can be entered.

  • Page 112: Operating Lines

    Suitable mounting locations are compact stations, control panels, control desks or the heating room. Not permitted are damp or wet spaces. At the selected location, the RVD230 can be fitted as follows: • In a control panel, on an inner wall or on a DIN mounting rail •...

  • Page 113: Engineering

    Control output for valve CLOSED Control output for d.h.w. intermediate circuit / storage tank charging pump Control output for circulating pump ON The base contains 2 auxiliary terminals N and 113/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 33 Engineering 27.05.2004...

  • Page 114: Relays

    • The protective function is ensured only if the installation is in proper working order For notes on installation in compliance with EMC requirements, refer to Data Sheet N2034. 114/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 33 Engineering 27.05.2004...

  • Page 115: Connection Diagrams

    D.h.w. intermediate circuit or d.h.w. storage tank charging pump (depending on the type of plant) Actuator of 2-port valve in the primary return Actuator 2 (depending on the type of plant) Actuator 3 (depending on the type of plant) 115/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 33 Engineering 27.05.2004...

  • Page 116: Mechanical Design

    Mechanical design 34.1 Basic design The RVD230 is comprised of controller insert, which accommodates the electronics, the power section, the output relays and – on the front – all operating elements, and the base, which carries the connection terminals. The RVD230 contains 9 relays The operating elements are located behind the cover.

  • Page 117: Technical Data

    37 m Copper cable ≥0.8 mm dia. 75 m Degrees of protection Degree of protection of housing to IEC 60529 IP 40D Safety class to EN 60730 117/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 35 Technical data 27.05.2004...
  • Page 118 Special requirements for energy controllers EN 60730-2-11 Weight Net weight 0.84 kg For setting ranges, refer to the descriptions of the function blocks or of the individual operating lines. 118/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 35 Technical data 27.05.2004...
  • Page 119 23 control of the circulating pump ........63 electric immersion heater ..........68 control of the intermediate circuit pump ....39 electronics ...............116 control of variable speed pump......... 37 119/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383de HVAC Products Index 27.05.2004...
  • Page 120 Valve actuator heating circuit .....60 limitations, display ............ 94 function blocks (list)...........17 line selection buttons ..........110 functional checks.............112 load control, M-bus ........... 90 load limit ..............79 120/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383de HVAC Products Index 27.05.2004...
  • Page 121 PWM output ............37, 114 no priority (d.h.w. heating) ........65 nominal d.h.w. temperature setpoint......32 QAW70 operating lines ...........106 Nominal setpoint ............29 quick setback ............49, 51 nonoccupancy time ........... 51 121/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383de HVAC Products Index 27.05.2004...
  • Page 122 ....71 wiring ..............111 slope of the heating curve .........43 software version ............94 source of time of day ..........81 yearly clock............... 31 space heating ............41 122/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383de HVAC Products Index 27.05.2004...
  • Page 123 Flow alarm Flow temperature heating circuit Forced charging at the beginning of release phase 1 Frost protection for the plant Function of circulating pump 123/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383de HVAC Products Alphabetical list of operating lines 27.05.2004...
  • Page 124 Maximum speed of the speed-controlled pump Maximum time of d.h.w. heating M-bus power control in the heating circuit (Load Management) M-bus primary address M-bus secondary address 124/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383de HVAC Products Alphabetical list of operating lines 27.05.2004...
  • Page 125 Setpoint of legionella function Slope, increase of the reduced room temperature setpoint Slope, maximum limitation of the primary return temperature Software version Speed of speed-controlled pump 125/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383de HVAC Products Alphabetical list of operating lines 27.05.2004...
  • Page 126 Upper constant value, maximum limitation of the primary return temperature Weekday Weekday for entering the d.h.w. program Weekday for entering the heating program Winter- / summertime changeover Year 126/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383de HVAC Products Alphabetical list of operating lines 27.05.2004...
  • Page 127 28.1 Setting ranges operating lines 182 and 192 corrected 30.3.4 QAW70 line 3 changed 32.1.4 Entire section reworded; various changes 33.5.2 Legend B12 corrected Entire chapter added 127/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products Revision history 27.05.2004...
  • Page 128 128/130 Siemens Building Technologies Basic documentation RVD230 CE1P2383en HVAC Products Revision history 27.05.2004...
  • Page 129 129/130 Siemens Building Technologies Basic Documentation RVD230 CE1P2383en HVAC Products 27.05.2004...
  • Page 130 Siemens Building Technologies AG © 2000 Siemens Building Technologies AG HVAC Products Subject to change Gubelstrasse 22 CH 6301 Zug Tel. +41 41 724 24 24 Fax +41 41 724 35 22 www.landisstaefa.com 130/130 Siemens Building Technologies Basic Documentation RVD230...

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