RVP340 Heating controller for 1 heating circuit RVP350 and RVP351 Heating controllers for 1 heating circuit and d.h.w. Basic Documentation Edition 2.
© 2011 Siemens Switzerland Ltd Subject to change Siemens Switzerland Ltd Industry Sector Building Technologies Division Theilerstrasse 1a CH 6300 Zug Tel. +41 58 724 24 24 www.siemens.
Contents 1 Summary .................................................................................................. 9 1.1 Brief description and key features............................................................. 9 1.2 Type summary........................................................................................... 9 1.3 1.3.1 1.3.2 1.3.3 1.3.4 1.3.5 Equipment combinations ........................................................................... 9 Suitable sensors......................
.6.2 Error handling .......................................................................................... 21 4.7 4.7.1 4.7.2 Collector temperature (B6) ...................................................................... 22 Type of sensor ......................................................................................... 22 Error handling .......................................................................................... 22 5 Function block: End-user space heating .................
9.6.1 9.6.2 9.6.3 9.6.4 Purpose ................................................................................................... 38 Settings ................................................................................................... 38 Deflection ................................................................................................ 39 Parallel displacement of heating curve ................................................... 40 9.7 9.7.1 Generation of setpoint ........................
14.5 14.5.1 14.5.2 14.5.3 Release of d.h.w. heating ........................................................................ 57 Function................................................................................................... 57 Release programs ................................................................................... 57 D.h.w. heating during holiday periods ..................................................... 58 14.6 14.6.1 14.6.2 14.6.3 14.6.4 14.6.5 14.6.6 14.6.7 14.6.
17.4.1 17.4.2 17.4.3 17.4.4 17.4.5 17.4.6 Frost protection for the plant ................................................................... 75 Manual overriding of operating mode (contact H1) ................................. 76 Pump overrun.......................................................................................... 76 Pump kick................................................................................................ 77 Winter-/summertime changeover ....................................
22.2 22.2.1 22.2.2 Connection diagrams ............................................................................ 101 Low-voltage side ................................................................................... 101 Mains voltage side ................................................................................ 101 23 Mechanical design .............................................................................. 103 23.1 Basic design ........................................................
1 Summary 1.1 Brief description and key features • RVP340, RVP350 and RVP351 are multifunctional heating controllers for use in residential and nonresidential buildings • They are suited for weather-compensated flow temperature control of 1 heating zone with or without room temperature influence and for demand-dependent boiler temperature control (RVP350 and RVP351) • The controllers are used in plants with own heat generation (RVP350 and RVP351) or district heat connection (RVP340) • On the d.h.w.
• For the room temperature: Suitable are sensors operating with a sensing element LG-Ni1000: − Room sensor QAA24 • For the outside temperature: − Outside sensor QAC22 (sensing element LG-Ni1000) − Outside sensor QAC32 (sensing element NTC 575) The controllers identify automatically the type of sensor used. 1.3.2 Suitable room units • Room unit QAA50.110/101 • Room unit QAW70 1.3.
2 Use 2.1 Types of plant The RVP3.. controllers are suitable for all types of heating plant that use weathercompensated flow temperature control. With regard to d.h.w. heating, the controllers are suited for plants with storage tank charging. Main applications: • Heating zones and d.h.w. heating with own heat generation • Heating zones with district heat connection • Interconnected plants consisting of heat generation, several heating zones and central or decentral d.h.w. heating 2.
• • • • • • • • • Remote control via room unit and external contacts Service functions Frost protection for plant, the boiler and the house or building Minimum or maximum limitation of return temperature Minimum and maximum limitation of flow temperature Maximum limitation of room temperature Periodic pump run Pump overrun Maximum limitation of the rate of setpoint increase For the programmed heating and d.h.w. circuits and their possible combinations, refer to chapter 3.2 "Plant types". 2.5 D.h.w.
3 Basics 3.1 Key technical features The RVP3... line of heating controllers offer the following key technical features: • The RVP340 controller is supplied with 2 programmed plant types, the RVP350 and RVP351 with 3. Illustrations of the different plant types are contained in chapter 3.2 "Plant types" • The different functions are assigned to the setting levels "End-user", "Heating engineer" and "Locking level".
3.2.2 Plant types with regard to d.h.w. In terms of d.h.w., the following plant types are available: • D.h.w. plant type 0: No d.h.w. • D.h.w. plant type 1: Storage tank with charging pump Note With d.h.w. plant type 1 (storage tank with charging pump), either the electric immersion heater or the solar collectors can be activated for d.h.w. charging. 3.2.
Plant types 3 - x Components shown in broken lines are optional. Key to plant components A6 B1 B2 B31 B32 B5 B6 B7 B9 Room unit Flow sensor Boiler sensor D.h.w. storage tank sensor/thermostat D.h.w. storage tank sensor/thermostat Room sensor Collector sensor Return sensor Outside sensor 3.3 Kx K4 K5 K6 M1 M2 M3 N1 Y1 K6, K7 = multifunctional outputs Burner stage 1 Burner stage 2 Circulating pump Circulating pump Heating circuit pump Storage tank charging pump Controller RVP3..
3.4 Heating circuit operating modes The required operating mode is selected on the controller by pressing the respective button. The operating mode can also be changed by bridging terminals H1-M.
3.5 D.h.w. heating modes D.h.w. heating is switched on and off by pressing the respective button: • ON (button is lit): D.h.w. heating takes place independent of the heating circuit’s operating mode and control. D.h.w. can be heated in one of 3 different ways: − According to the scheduler program 2 entered − According to the heating circuit program entered (–1 hour) − Continuously (24 hours a day) During the holiday period entered, d.h.w.
3.7 Plant type and operating mode The following operating modes are available, depending on the selected type of plant: Plant type 1–0, 2–0, 3–0 1–1, 3–1 3.8 Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Operating state and operating level The user selects the required operating mode by pressing the respective button. Each operating mode has a maximum of 2 operating states – with the exception of operating mode "Continuously NORMAL heating" (only 1 operating state).
4 Acquisition of measured values 4.1 Room temperature (A6, B5) 4.1.1 Types of sensors The following choices are available: • A room sensor QAA24 can be connected to terminal B5. The measuring range is 0…50 °C • A room unit QAA50.110/101 or QAW70 can be connected to the PPS (point-topoint interface), terminal A6. The measuring range is 0…32 °C.
4.2 Flow temperature (B1) 4.2.1 Types of sensors Suitable are Siemens sensors operating with a sensing element LG-Ni1000. Averaging with 2 sensors is not possible. 4.2.2 Error handling A flow sensor with a short-circuit or an interruption always leads to a corresponding error message, irrespective of the type of plant.
• Controller not connected to data bus (LPB): The control operates with a fixed outside temperature of 0 °C. An error message is delivered • Controller connected to data bus (LPB): If the outside temperature is available via data bus, it is used. An error message is not delivered (this is the normal status in interconnected plants!). But if no outside temperature is available via data bus, the control uses a fixed outside temperature of 0 °C. In that case, an error message is delivered 4.
2 storage tank sensors (operating line 126 = 1) In the event of a short-circuit or an interruption of one of the 2 measuring circuits, the controller continues to operate with the other measuring circuit. An error message is delivered. If both measuring circuits do not produce a valid measured value, 2 error messages are delivered. D.h.w. is no longer heated; the charging pump will be deactivated.
5 Function block: End-user space heating This function block provides settings that the end-user himself can make. 5.
5.3 Heating program The heating program offers a maximum of 3 heating phases per day; in addition, every weekday can have different heating phases. Caution The inputs to be made are not the switching times, but the periods of time during which the NORMAL room temperature shall be maintained. These periods of time are usually identical with the building's occupancy times.
6 Function block: End-user d.h.w. This function block provides settings for the d.h.w. temperature that the end-user himself can make. 6.1 Line Operating lines Function, parameter 26 NORMAL setpoint for d.h.w. temperature 27 Display of current d.h.w. temperature 28 REDUCED setpoint for d.h.w. temperature 6.2 Factory setting (range) Unit 55 (20...100) °C Display function °C 40 (8...80) °C Setpoints The d.h.w. temperature setpoints are to be entered in °C.
6.3 Actual value Operating line 27 displays the current d.h.w. temperature. When using 2 d.h.w. sensors (B31 and B32), the temperature of the ”warmer” sensor is displayed. When using thermostats, the actual value of the d.h.w. temperature cannot be displayed. In that case, the display shows ---. 26/108 Siemens Building Technologies Basic Documentation RVP340, RVP350, RVP351 6 Function block: End-user d.h.w.
7 Function block: End-user general This function block provides settings that the end-user himself can make, plus indication of faults. 7.1 Line 31 32 33 34 35 36 37 38 39 40 41 50 7.2 Operating lines Function, parameter Weekday, for entering scheduler program 2 Start of 1st ON phase End of 1st ON phase Start of 2nd ON phase End of 2nd ON phase Start of 3rd ON phase End of 3rd ON phase Time of day Weekday Date Year Faults Factory setting (range) Unit 1-7 (1...7, 1-7) 05:00 (--:-- / 00:00...
7.
8 Function block: Plant configuration This function block only provides selection of the plant type: 8.1 Line 51 8.2 Operating line Function, parameter Plant type Factory setting (range) RVP340 RVP35.. 1−0 (1–0, 2–0) 3–1 (1–1, 3–0, 3–1) General When commissioning a plant, the respective plant type must be entered first on the RVP340 or RVP35.. This ensures that the functions required for the specific type of plant, the parameters and operating lines for the settings and displays are activated.
9 Function block: Space heating This function block performs the automatic ECO function, the optimization functions with boost heating and quick setback, plus room influence. 9.1 Line 61 62 63 64 65 66 67 68 69 70 71 9.
• The attenuated outside temperature (TAD): It is generated by double-filtering the current outside temperature by the building time constant. This means that – in comparison with the current outside temperature – the attenuated outside temperature is considerably dampened. This ensures that no heating is provided in the summer when – because the outside temperature drops for a few days – the heating would normally be switched on TA (B9 rsp.
In all these cases, the assumption is made that the amount of heat entering the building from outside, or the amount of heat stored in the building structure, is sufficient to maintain the required room temperature level. When the automatic ECO function switches the heating off, the display shows ECO.
9.4 Optimization 9.4.1 Definition and purpose Operation of the heating system is optimized. EN 12 098 defines optimization as automatic shifting of the switch-on and switch-off points aimed at saving energy. This means that… • switching on and heating up as well as switching off are controlled such that during building occupancy times the required room temperature level is always ensured, • the smallest possible amount of heating energy is used to achieve this objective. 9.4.
9.4.5 TRw Process TRw TRw TRx TRw HP HP TR t t1 t2 t3 TRw TRw TRw ∆TRw TRx Heating program Room temperature Zeit Forward shift for early shutdown Forward shift to start heating up Quick setback Room temperature setpoint Setpoint for NORMAL room temperature Setpoint for REDUCED room temperature Boost of room temperature setpoint (with boost heating) Actual value of room temperature 9.4.
TRw TRM 2522D18 TRw TRw t1 Progression of room temperature generated by the room model e kt t t1 TAM 2.71828 (basis of natural logarithms) Building time constant in hours Time in hours Quick setback Composite outside temperature 9.4.7 TR TRM TRw TRw Room temperature Room model temperature Setpoint for NORMAL room temperature Setpoint for REDUCED room temperature Optimized switching off During the building's occupancy time, the controller maintains the setpoint for NORMAL heating.
9.4.9 Optimized switching on During nonoccupancy times, the controller maintains the setpoint for REDUCED heating. Toward the end of the nonoccupancy time, optimization switches the control to boost heating; this means that the set boost is added to the room temperature setpoint. Optimization calculates the switchover point such that, when occupancy starts, the room temperature will have reached the setpoint for NORMAL heating.
The duration of boost is limited to 2 hours. TR TRw TRw TRw TRM 2522D19 TRM1 TRw t1 t where: kt t t1 TR TRw TRw TRM TRM1 TRw ∆TRw Building time constant in hours Time Duration of boost of room temperature setpoint with boost heating Room temperature Setpoint for NORMAL room temperature Setpoint for REDUCED room temperature Room model temperature Room model temperature when boost heating is started Room temperature setpoint Boost of room temperature setpoint (with boost heating) 9.
9.5.2 Room influence The room temperature is included in the control process. Required for that purpose is a room sensor or room unit. A gain factor for the room temperature’s influence on flow temperature control can be adjusted.
The basic settings during the commissioning phase are made based on the planning documentation or according to local practices. They are made on operating lines 14 and 15: Op. line 14 15 Setpoint Flow temperature setpoint at an outside temperature of 15 °C Flow temperature setpoint at an outside temperature of –5 °C 2474Z06 TVw 120 110 100 90 80 70 60 50 40 30 20 10 20 10 15 5 0 BZ 14 -5 -10 -15 -20 BZ 15 -30 TA Heating curve diagram showing the basic settings BZ 14 BZ 15 TA TVw 9.6.
9.6.4 Parallel displacement of heating curve The heating curve can be shifted parallel, manually with the knob for room temperature readjustments. This readjustment is made by the end-user and covers a range of −4.5...+4.5 °C room temperature.
9.7 Generation of setpoint 9.7.1 Weather-compensated control Weather-compensated control is used with all types of plants. The setpoint is generated via the heating curve as a function of the outside temperature. The temperature used is the composite outside temperature. OZW30 SYNERGYR central unit Room temp. setpoint NORMAL * Only active with room unit level Room temp. setpoint REDUCED s Heating curve slope Room temp.
10 Function block: Actuator heating circuit This function block provides control of the heating circuit. It acts as follows, depending on the type of plant: • Weather-compensated on the mixing valve of a space heating system • Weather-compensated on the valve in the primary return of a space heating system with district heat connection 10.
10.2.2 Setpoint increase TVw ∆TVw Maximum increase: = –––––––– ∆t TVw 2522D07 t t t Time ∆t Time unit TVw Flow temperature setpoint ∆TVw Setpoint increase per time unit The rate of increase of the flow temperature setpoint can be limited to a maximum (heating up brake). In that case, the maximum the flow temperature setpoint can increase is the set temperature per time unit (°C per hour).
10.3.2 3-position control 3-position control operates as weather-compensated PI flow temperature control. The flow temperature is controlled via the modulating actuating device (mixing valve or 2-port valve). There is no proportional offset, owing to the control system’s I-action. 10.4 Auxiliary variables in interconnected plants 10.4.1 Temperature boost mixing valve/heat exchanger A higher mixing valve or heat exchanger temperature can be entered on the controller.
11 Function block: Boiler Function block "Boiler" acts as a 2-position controller and is used for direct burner control. It operates as a demand-dependent boiler temperature controller of a common flow, which supplies heat to one or several consumers. 11.
11.3 Limitations 11.3.1 Maximum limitation of boiler temperature For maximum limitation of the boiler temperature, the maximum limit value can be set. The switch-off point cannot be higher than the maximum limit value. The switch-on point is then lower, the difference being the set switching differential. If the boiler temperature is limited to a maximum, the display shows . This maximum limitation is not a safety function; for that purpose, a thermostat or thermal reset limit thermostat, etc.
If there is no more deviation before the minimum burner running time has elapsed, the burner will nevertheless continue to operate until that time has elapsed (burner cycling protection). This means that the minimum burner running time has priority. Maximum limitation of the boiler temperature is maintained, however, which always leads to burner shutdown.
released. The first stage continues to operate. If the flow temperature drops again, the second stage is switched on again at x < w − 0.5 * SD. Now, the setpoint is maintained with the help of the second burner stage. If, however, the flow temperature continues to rise (x > w + 0.5 * SD), the controller starts generating the reset integral. It determines for how long and to what extent the flow temperature remains above the setpoint by half the switching differential.
If the boiler temperature falls below 5 °C, the burner is always switched on and keeps running until the boiler temperature exceeds its minimum limit by the amount of the switching differential. 11.4.4 Protective boiler startup If the boiler temperature falls below the minimum limit of the boiler temperature while the burner is running, the temperature differential (minimum limit value minus actual value) is integrated.
All consumers (heating and d.h.w. circuits) and heat exchangers that abruptly reduce their heat request monitor the data bus during the set pump overrun time to see if a forced signal is being sent by the boiler. If no forced signal is received, the consumers and heat exchangers only perform pump overrun (refer to chapter 17.4.3 "Pump overrun").
12 Function block: Setpoint return temperature limitation On this function block, the setpoint for minimum limitation of the return temperature or the constant value for shifting maximum limitation of the return temperature can be adjusted. 12.1 Line 101 Operating line Function, parameter Setpoint return temperature limitation, constant value 12.2 Factory setting (range) Unit --- (--- / 0...
12.3.2 Mode of operation If the return temperature falls below the set minimum limit value, the temperature differential of minimum limit value and actual value is integrated. From this, a critical locking signal is generated and forwarded to the connected consumers. This causes the loads to reduce their setpoints, aimed at consuming less energy. If the return temperature returns to a level above the minimum limit value, the integral is reduced, resulting in a reduction of the critical locking signal.
12.3.3 Mode of operation with an autonomous unit (without bus) Without minimum limitation of the return temperature Operating line 101 = 50 °C Return temperature sensor connected Controller 2 generates internally a critical locking signal which shuts the heating circuit mixing valve and deactivates the charging pump Variant 1 Central impact of limitation Critical locking signal Controller 1 Plant type no.
13 Function block: District heat Together with function block "Actuator heating circuit", this function block provides control of the flow temperature in plants with an indirect (heat exchanger) or direct district heat connection. It acts as a flow temperature controller for weather-compensated control of space heating with a district heat connection (plant type 2 - 0).
The current limit value can be determined as follows: • If the outside temperature is higher than or equal to the value set for the start of compensation (setting on operating line 113), the current limit value is the constant value entered on operating line 101 • If the outside temperature lies below the value set for the start of compensation, the current limit value TL is calculated according to the following formula: TL [°C] = TL constant + [ ( TL start − TA ) * s ] Function The outside temperature is
14 Function block: D.h.w. This function block is used for making all d.h.w.-related settings. 14.1 Line 121* 123 124 126 127 128 129 130 131 Operating lines Function, parameter Assignment of d.h.w. Release of d.h.w. heating D.h.w. priority D.h.w. storage tank sensor/thermostat Boost d.h.w. charging temperature Switching differential d.h.w. Maximum time d.h.w. charging Setpoint legionella function Forced charging Factory setting (range) 0 (0...2) 2 (0...2) 0 (0...4) 0 (0…5) 10 (0...50) 8 (1...
14.5 Release of d.h.w. heating 14.5.1 Function Operating line 123 is used to select the times at which d.h.w. heating shall be released. Released means that the storage tank is recharged whenever there is a need. When using this function, d.h.w. heating can be prevented during nonoccupancy times (e.g. at night or during holiday periods). If, in the summer, d.h.w.
Example 1 Op. line 121 2 Op. line Con- Oper. 123 troller mode A 1 B C Op. line 121 2 Release D.h.w. heating is released from 04:00 to 23:00 07:00...22:00, optimized switching on produces a forward shift of 2 hours 03:00...22:00, holidays D Example 2 Heating program, optimization, holidays 06:00...18:00, no optimization 07:00...23:00 Op. line Con- Oper. 123 troller mode A 1 B C Heating program, optimization, holidays 06:00...18:00, no optimization 08:00...23:00 Release D.h.w.
• Absolute priority • Shifting priority • No priority (parallel operation) Priority is accomplished by delivering locking signals. The impact of the locking signals is described in chapter 17.4.6 "Locking signal gain". 14.6.3 Absolute priority During d.h.w. charging, the heating circuits are locked, which means that they cannot draw any heat. • Controller without bus connection: During d.h.w.
14.6.6 Flow temperature setpoint With "Shifting priority" and "No priority", the temperature setpoint for the common flow, which is used for d.h.w. charging and space heating, can be generated in 2 different ways: • Flow temperature setpoint according to maximum selection • Flow temperature setpoint according to d.h.w. request With plant types 1 - x and 2 - x, the temperature setpoint for the common flow is forwarded to the precontroller via data bus.
The switch-on and switch-off temperatures for charging via sensors are calculated as follows: SDBW 2524D02 ON OFF TON ON OFF SDBW TON TOFF TBWw TBWx TBWx1 TBWx2 TOFF = TBWw TBWx D.h.w. charging ON D.h.w charging OFF Switching differential of d.h.w. charging (operating line 128) Switch-on temperature Switch-off temperature NORMAL or REDUCED setpoint of d.h.w. temperature (operating line 26 or 28) D.h.w.
14.9 Boost of d.h.w. charging temperature Operating line 127 can be used to set the boost of the d.h.w. charging temperature in Kelvin. The boost refers to the d.h.w. temperature setpoint. The lower the boost setting, the longer d.h.w. charging takes. TLw [°C] = TBWw + TBW∆ Example: D.h.w. temperature setpoint (TBWw, operating line 26) Boost of charging temperature (TBW∆, operating line 127) Resulting charging temperature setpoint TLw = 50 °C = 10 K = 60 °C If a thermostat is used, the boost of the d.h.
14.11 Setpoint for legionella function Operating line 130 can be used to adjust the setpoint for the legionella function or to deactivate the function (setting ---). For a description of the legionella function and related settings, refer to chapter 16 "Function block: Legionella function". 14.12 Forced charging Operating line 131 can be used to select whether or not forced charging of the storage tank shall take place every day when d.h.w. heating is released for the first time.
14.14 Manual d.h.w. charging D.h.w. charging can be started manually by pressing the d.h.w. button seconds. For confirmation, the button flashes for 5 seconds. for 5 Manual d.h.w. charging is also active when … • • • • • d.h.w. heating is not released, the d.h.w. temperature lies inside the switching differential, d.h.w. heating is switched off, d.h.w. heating is switched off due to the holiday period, d.h.w. heating is locked because the maximum charging time has been exceeded.
15 Function block: Multifunctional relays The RVP3.. controllers are equipped with up to 2 multifunctional relays K6 and K7 whose functions are selected with this function block. These relays are also used for the control of a circulating pump, a collector pump, or an electric immersion heater for d.h.w. heating. The multifunctional relays can be parameterized independently. Note False configurations are not prevented! 15.
• ”Relay energized in the event of fault” • ”Relay energized when there is demand for heat” 15.2.1 No function The multifunctional relay is not assigned any function. 15.2.2 Relay energized in the event of fault If the controller receives an error message from itself or via data bus (LCD shows Er), the multifunctional relay is energized. This takes place with a delay of 2 minutes. When the error is corrected, that is, when the error message is no longer present, the relay is deenergized with no delay.
Example 1 Op. line 121 2 Example 2 Op. line 141 4 Op. line 121 Op. line 141 2 4 Controller A B C D Controller A B C D Operation of circulating pump during holiday periods Operating Heating program, mode holidays 06:00...18:00 07:00...23:00 07:00...22:00 03:00...22:00, holidays Operating Heating program, mode holidays 06:00...18:00, optimized switching on produces a forward shift of 2 hours 08:00...23:00 07:00...22:00 05:00...
Charging via the heating system The setting to be made on operating line 141 is 0...5, and the setting on operating line 142 is 0 or 1. The d.h.w. storage tank is charged via the heating system throughout the year. Charging in alternating mode The setting to be made on operating line 141 is 7, 8 or 9, or on operating line 142 it is 2, 3 or 4. In the winter, the d.h.w. storage tank is charged via the heating system, and in the summer with the electric immersion heater.
16 Function block: Legionella function When using d.h.w. heating systems with storage tanks, the legionella function prevents excessive concentrations of legionella viruses. The function ensures periodic heating up of the d.h.w. to a sufficiently high temperature level for a certain dwelling time. 16.
16.1.5 Operation of circulating pump Operating line 150 is used to select whether the legionella function shall act on the d.h.w. circulating pump: • With setting 0, the legionella function does not act on the circulating pump. • With setting 1, the legionella function acts on the circulating pump. 16.
The following graph shows the behavior of the legionella function as a function of the d.h.w. temperature: TBWx ON OFF ON OFF ON OFF TBWx TBWw SDBW t Circulating pump Forced charging Release of legionella function Start conditions for legionella function fulfilled Start dwelling time Reset dwelling time Start dwelling time Dwelling time has elapsed D. h.w. temperature D.h.w. temperature setpoint Switching differential of d.h.w. charging Time It set, a maximum d.h.w. charging time is also active here.
17 Function block: Service functions and general settings This function block is used to combine various displays and setting functions that are of assistance in connection with commissioning and service work. In addition, a number of extra functions are performed. The number of available operating lines and settings depend on the type of controller used. 17.
17.3 Commissioning aids 17.3.1 Simulation of outside temperature To facilitate commissioning and fault tracing, outside temperatures in the range from −50 to 50 °C can be simulated. Simulation has an impact on the current, the composite and the attenuated outside temperature. Simulated TA = current TA = composite TA = attenuated TA During the simulation, the current outside temperature (as acquired by the sensor or via LPB) is overridden.
17.3.3 Sensor test Operating line 163 can be used to check the connected sensors; if available, the current setpoints and limit values are displayed on operating line 164. The 8 temperatures can be queried by entering 0...8: Input 0 1 2 3 4 5* 6* 7* 8* Op. line 163 (actual values) Actual value of outside sensor at terminal B9.
17.4 Auxiliary functions 17.4.1 Frost protection for the plant The plant can be protected against frost. Precondition is that controller and heat source are ready to operate (mains voltage present!).
17.4.2 Manual overriding of operating mode (contact H1) Using a simple remote control, the operating mode of the heating circuit and that of d.h.w. can be overridden. This is accomplished by bridging terminals H1−M. The operating mode that shall rule when H1−M are bridged can be selected on operating line 172: Setting 0 Operating mode of heating circuit Protection mode Operating mode of d.h.w.
17.4.4 Pump kick To prevent pump seizing during longer off periods (e.g. in the summer), a periodic pump kick can be activated on operating line 175. The input is either 0 or 1: 0 = no periodic pump kick 1 = weekly pump kick If the pump kick is activated, all pumps run for 30 seconds, one after the other, every Friday morning at 10:00, independent of all other functions and settings. 17.4.5 Winter-/summertime changeover Changeover from wintertime to summertime, and vice versa, takes place automatically.
Critical locking signals Critical locking signals are generated by the boiler temperature controller during protective boiler startup and during minimum limitation of the boiler return temperature. If the boiler temperature controller is located in segment 0, the critical locking signal is sent to all consumers and heat exchangers in the bus network and – if present – to its own heating and d.h.w. circuit.
17.5 Inputs for LPB (RVP340 and RVP350) 17.5.1 Source of time of day Several sources are available for the time of day, depending on the master clock.
17.5.2 Outside temperature source If, in interconnected plants, the outside temperature is acquired via bus, the temperature source can be addressed either automatically or directly (operating line 180). Addressing Display, input A xx.yy Comments Automatically Directly xx.yy Display A (for automatically) and xx.
17.5.4 Bus power supply In interconnected plants with a maximum of 16 controllers, bus power supply can be decentralized, that is, power can be supplied by each connected device. If a plant contains more than 16 devices, central bus power supply is mandatory. In that case, it must be selected on every connected device whether the data bus is powered centrally or decentrally by the controllers. With the controller, this setting is made on operating line 179.
18 Function block: Solar d.h.w. 18.1 Operating lines This function block provides settings for the heating engineer. Line Function, parameter Temperature differential solar ON Temperature differential solar OFF Fost protection temperature for collector Overtemperature protection for collector Evaporation temperature of heat conducting medium Maximum limitation of charging temperature Maximum limitation storage tank temperature Collector start function gradient 201 202 203 204 205 206 207 208 18.
18.3 Functions 18.3.1 Temperature differential ON/OFF solar Operating lines 201 and 202 are used to set the temperature differential for switching solar d.h.w. charging on and off. A certain temperature differential of collector and storage tank is required for charging; also, the collector must have reached the minimum charging temperature.
18.3.3 Minimum running time When the collector pump is activated, it keeps running for a minimum time of tMin = 20 seconds. This minimum on time applies to all functions that activate the collector pump.
• The frost protection function is aborted when the d.h.w. storage tank temperature drops below 8 °C • Setting --- deactivates the frost protection function for the collector 18.3.5 Overtemperature protection for the collector Operating line 204 is used to set the temperature that protects the collector against overheating.
18.3.6 Storage tank recooling After overtemperature protection for the collector has been active, function "Storage tank recooling" discharges the d.h.w. storage tank to bring it down to a lower temperature level. Storage tank recooling is effected via the collector’s surface. For that, the collector pump is activated, thus transferring heat from the storage tank to the collector to be emitted to the environment via the collector’s surface. 2541D10 The recooling setpoint (TRk) is set to a fixed 80 °C.
18.3.7 Evaporation temperature of heat conducting medium Operating line 205 is used to set the evaporation temperature of the heat conducting medium. If there is a risk of evaporation of the heat conducting medium (due to high collector temperatures), the collector pump is deactivated to prevent it from overheating. This is a pump protection function.
18.3.9 Maximum limitation of storage tank temperature Operating line 207 is used to set the maximum limitation of the storage tank temperature. The storage tank is never charged to a level above the set maximum temperature (refer to chapter 18.3.5 "Overtemperature protection for the collector"). Caution Maximum limitation of the storage tank temperature is not a safety function! 18.3.10 Collector start function The controller is supplied with the collector start function deactivated.
19 Function block: Locking functions All settings can be locked on the software side to prevent tampering. 19.1 Line 248 Operating line Function, parameter Locking of settings 19.2 Factory setting (range) Unit RVP340: 0 (0...2) RVP35..: 0 (0 / 1) - Locking settings on the software side Operating line 248 can be used to lock on the software side the settings made on the controller. This means that the settings made can still be queried on the controller, but cannot be changed anymore.
20 Communication 20.1 Interplay with room units . 20.1.1 General The room temperature acquired by a room unit is fed to controller terminal A6. If the room temperature signal delivered by the room unit shall not be included in the control functions, the respective source must be selected (operating line 65). In that case, the other room unit functions are maintained.
20.1.3 Interplay with room unit QAW70 In combination with the QAW70, the following functions can be performed, or the room unit can act on the controller as follows: • • • • • • • Overriding the heating circuit's operating mode Changing room temperature setpoints Changing the d.h.w.
Impact of the individual QAW70 operating lines on the controller If 1 (slave without remote control) is entered on the controller’s operating line 178 ("Source of time of day"), the time of day on the QAW70 cannot be readjusted. Op. line Function, parameter QAW70 1 Setpoint for NORMAL heating 2 Setpoint for REDUCED heating 3 D.h.w.
20.1.4 Interplay with SYNERGYR central unit OZW30 Based on the room temperature of the individual apartments, the OZW30 central unit (software version 3.0 or higher) generates a load compensation signal. This signal is passed on via LPB to the controller where it leads to an appropriate change of the flow temperature setpoint. 20.2 Communication with other devices RVP340 and RVP350 offer the following communication choices: • Forwarding the heat demand of several RVP3...
21 Handling 21.1 Operation 21.1.1 General Operating elements 1 2 3 4 5 6 7 8 Buttons for selecting the operating mode (button pressed is lit) Display (LCD, RVP35..-specific) Buttons for selecting the operating lines Button for manual control ON/OFF Buttons for valve OPEN/CLOSE when manual control ON Button for d.h.w. heating ON/OFF (ON = button lit) (only with RVP35..
LCD and status display RVP3..
Buttons and displays for manual control 3 buttons are provided for manual control: Display of positioning commands All positioning commands sent to the relays appear on the LCD. Operating line principle Input and readjustment of all setting parameters, activation of functions and reading of actual values and operating states are based on the operating line principle. An operating line with an associated number is assigned to each parameter, each actual value and each function.
Info values Basic information about the plant is obtained by pressing Meaning: Number Plant information --0 1 2 3 4* 5* 6* 7* Time of day Outside temperature B9 Flow temperature Room temperature Return temperature D.h.w. temperature B31 D.h.w. temperature B32 Collector temperature B6 Boiler temperature B2 * and . Not available with RVP340 The information selected last is continuously displayed. 21.1.
21.2 Commissioning 21.2.1 Installation Instructions The controller is supplied complete with Installation Instructions covering in detail installation, wiring and commissioning with function checks and settings. The instructions address trained specialists. Each operating line has an empty field where the set value can be entered. The Installation Instructions together with the plant’s documentation should be kept in a safe place! 21.2.
21.3 Installation 21.3.1 Mounting location The ideal location for the controller is a dry room, such as the boiler room. The permissible ambient temperature is 0...50 °C. When the mounting location is selected, the controller can be fitted as follows: • • • • In a control panel, on an inner wall or on a top hat rail On a panel front In a control panel front In the sloping front of a control desk 21.3.
22 Engineering 22.
22.2 Connection diagrams 22.2.1 Low-voltage side RVP340 RVP350 and RVP351 * LPB only with RVP350 22.2.
Key A6 B1 B2 B31 B32 B5 B6 B7 B9 E1 F1 F2 Kx LPB M1 M2 M3 N1 S1 Y1 Room unit Flow sensor Boiler sensor (only RVP35..) D.h.w. storage tank sensor/thermostat (only RVP35..) D.h.w. storage tank sensor/thermostat (only RVP35..) Room sensor Collector sensor (only RVP35..) Return sensor Outside sensor 2-stage burner (only RVP35..) Thermal reset limit thermostat (only RVP35..) Safety limit thermostat (only RVP35..) K6, K7 = multifunctional outputs Data bus (only RVP340 and RVP350) Circulating pump (only RVP35..
23 Mechanical design 23.1 Basic design The RVP3.. controller consists 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. On the inner side of the cover, there is a holder where the Operating Instructions can be inserted. The controller has the standard overall dimensions 96 mm x 144 mm.
24 Addendum 24.1 Technical data For technical data, refer to Data Sheet N2545. 24.2 Revision history Edition 1.0 is the first publication of this document. So there are no alterations against any previous editions.
Index 2 2-position control ............................................ 43, 46 2-position controller .............................................. 45 3 3-position control .................................................. 44 A Absolute priority .................................................... 59 Access rights ........................................................ 97 Acknowledgement ................................................ 28 Acquisition of measured values ............................
Frost protection for the collector ........................... 84 Frost protection for the plant ................................. 75 Frost protection function solar .............................. 84 Frost protection, plant ........................................... 75 Function block actuator heating circuit ...................................... 42 boiler .................................................................. 45 d.h.w. .................................................................
P Parallel displacement of heating curve ................. 40 Parallel operation .................................................. 59 Periodic pump run................................................. 77 Plant type ........................................................ 18, 29 Plant types ............................................................ 13 Progression of outside temperature ..................... 30 Protection against boiler overtemperatures .......... 49 Protection against discharging ........
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