Siemens RVL481 Basic Documentation
Heating and d.h.w. controller
Hide thumbs
Also See for RVL481:
- Operating instructions manual (32 pages) ,
- Installation instructions manual (276 pages)
Related Manuals for Siemens RVL481
Summary of Contents for Siemens RVL481
- Page 1 Heating and D.h.w. Controller RVL481 Basic Documentation Edition: 1.0 Controller series: A CE1P2541en Building Technologies 20.05.2008...
- Page 2 © 2008 Siemens Switzerland Ltd Building Technologies Group Subject to alteration International Headquarters Gubelstrasse 22 CH – 6301 Zug Tel. +41 41 724 24 24 Fax +41 41 724 35 22 www.sbt.siemens.com 2/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 20.05.2008...
-
Page 3: Table Of Contents
Plant type and operating mode..............23 Operating state and operational level............24 Acquisition of measured values ..............25 Room temperature (A6, B5)................25 4.1.1 Measurement....................25 4.1.2 Handling faults....................25 3/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Contents 20.05.2008... - Page 4 Setpoint......................31 Actual value ....................31 Function block "Enduser general".............32 Operating lines....................32 Switching program 2 ..................32 Time of day and date ..................32 Indication of errors ..................33 Function block "Plant type"................34 4/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Contents 20.05.2008...
- Page 5 Weather-compensated control ..............46 10.7.2 Demand-compensated control ..............46 Function block "3-position actuator heating circuit"....... 47 11.1 Operating lines ....................47 11.2 Limitations ..................... 47 11.2.1 Flow temperature limitations................47 5/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Contents 20.05.2008...
- Page 6 Minimum stroke limitation (suppression of hydraulic creep) ......60 14.2.5 Flow limitation ....................60 Function block "Maximum limitation of the return temperature, d.h.w."61 15.1 Operating line....................61 15.2 Purpose......................61 15.3 Function ......................61 Function block "Basic settings d.h.w." .............62 6/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Contents 20.05.2008...
- Page 7 Protection against discharging ..............73 19.8.1 Purpose ......................73 19.8.2 Mode of operation..................73 19.9 Manual d.h.w. charging ................. 74 Function block "3-position actuator for d.h.w." ........75 7/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Contents 20.05.2008...
- Page 8 25.2.2 Heating curve....................83 25.2.3 Hours run counter ..................83 25.2.4 Software version ....................84 25.2.5 Identification number of room unit..............84 25.3 Commissioning aids..................84 25.3.1 Simulation of the outside temperature ............84 8/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Contents 20.05.2008...
- Page 9 Communication ..................100 28.1 Combination with room units ............... 100 28.1.1 General......................100 28.1.2 Combination with room unit QAW50 ............100 28.1.3 Combination with room unit QAW70 ............101 9/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Contents 20.05.2008...
- Page 10 Connection terminals ...................109 30.1.1 Low-voltage side ..................109 30.1.2 Mains voltage side ..................109 30.2 Connection diagrams ...................110 Mechanical design ..................111 31.1 Basic design....................111 31.2 Dimensions ....................111 Technical data ....................112 10/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Contents 20.05.2008...
-
Page 11: Summary
• For use in plants with own heat generation or with a district heat connection • With regard to d.h.w. heating, the RVL481 is suited for plants with d.h.w. storage tanks, electric immersion heaters, solar d.h.w. heating and instantaneous systems with own heat exchangers •... -
Page 12: Suitable Room Units
• All LPB-compatible controllers supplied by Siemens • SYNERGYR central unit OZW30 (software version 3.0 or higher) Note The heating controller RVL481 cannot be used as partner unit for the RVL469! 1.2.5 Passing on of heat demand signal The scalable DC 0…10 V signal can be used to pass the heat demand signal to other devices in the system. -
Page 13: Use
• Interconnected plants consisting of heat generation, several heating zones and central or decentral d.h.w. heating Types of houses and buildings Basically, the RVL481 is suited for use in all types of houses and buildings. It has been designed especially for: • Multi-family houses •... - Page 14 • Flow alarm • Legionella function • Manual d.h.w. charging For the preprogrammed heating and d.h.w. heating circuits and their possible combina- tions, refer to section 3.2 ”Plant types”. 14/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 2 Use 20.05.2008...
-
Page 15: Fundamentals
Key technical features The RVL481 offers 2 key technical features: • The RVL481 has 6 heating circuit plant types and 5 d.h.w. plant types preprogrammed. When making use of all possible or practical combinations, there is a total of 29 plant types available •... -
Page 16: Plant Types
On the following pages, a description of the individual functions per block and line is given. Plant types The RVL481 has 29 plant types preprogrammed; the functions required for each type of plant are ready assigned. When commissioning the installation, the relevant plant type must be selected. -
Page 17: Heating Circuit Plant Types
Can be combined with d.h.w. types: • with types 1, 2 and 3 via hydraulic connection at • with type 5 without hydraulic connection A6/B5 1, 2 17/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 3 Fundamentals 20.05.2008... - Page 18 Can be combined with d.h.w. types: • with types 1, 2 and 4 via hydraulic connection at • with type 5 without hydraulic connection 1, 2, 4 18/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 3 Fundamentals 20.05.2008...
-
Page 19: Plant Types
Charging of d.h.w. storage tank through control of the charging pump. Acquisition of the d.h.w. temperature with one or 2 sensors or thermostats. Circulating pump and solar collector or electric immersion heater are optional. 19/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 3 Fundamentals 20.05.2008... - Page 20 Charging of d.h.w. storage tank only through release of the electric immersion heater. No control of d.h.w. heating by the controller. Circulating pump and solar collector are optional. 20/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 3 Fundamentals 20.05.2008...
-
Page 21: Setting Levels, Function Blocks And Plant Types
The above table shows • the assignment of function blocks to the 3 operating levels • the function blocks activated with the different plant types 21/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 3 Fundamentals 20.05.2008... -
Page 22: Heating Circuit Operating Modes
(with data bus, depending on the setting made). • OFF (button dark): No d.h.w. heating. Frost protection is ensured (with the excep- tion of plant types x–4 and x–5) 22/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 3 Fundamentals 20.05.2008... -
Page 23: Manual Operation
Manual operation The RVL481 can be switched to manual operation. In this case, the control will be switched off. In manual operation, the various actuating devices behave as follows: • Heating circuit mixing valve: This mixing valve is not under voltage, but can be manu-... -
Page 24: Operating State And Operational Level
When the operating state is ON, there is a maximum of 3 operational levels, depending on the operating mode. The operational level is determined by the heating program and the holiday program. Operating mode Operating state Operational level 24/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 3 Fundamentals 20.05.2008... -
Page 25: Acquisition Of Measured Values
• A room unit QAW50 or QAW70 can be connected to terminal A6 • 2 units can be connected to the terminals. In this case, the RVL481 can ascertain the average of the 2 measurements. The other room unit functions will not be affected by averaging 4.1.2... -
Page 26: Handling Faults
In interconnected plants, the primary return temperature with plant type 1–x can be acquired via data bus. Controllers with plant type 1–0 and connected sensor pass the return temperature signal to the data bus. 26/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 4 Acquisition of measured values 20.05.2008... -
Page 27: Handling Faults
• With one or 2 sensors having a sensing element LG-Ni 1000, or • With one or 2 thermostats This means that there are 2 measuring circuits. 27/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 4 Acquisition of measured values 20.05.2008... -
Page 28: Handling Faults
An error message is generated and the collector pump deactivated with a delay of 12 hours in case of a short-circuit or open-circuit in the measuring circuit. There is no solar d.h.w. heating. 28/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 4 Acquisition of measured values 20.05.2008... -
Page 29: Function Block "Enduser Space Heating
ECO – if available – will stop OFF until the room temperature has risen 1 °C above the holiday / frost protection setpoint. Heating program The heating program of the RVL481 provides a maximum of 3 heating periods per day; also, every weekday may have different heating periods. Caution The entries to be made are not the switching times, but the periods of time during which the NORMAL room temperature shall apply. -
Page 30: Holiday Program
/ holiday mode takes place. At 24:00 of the last day of the holiday period, the RVL481 will change to NORMAL or REDUCED heating in accordance with the time switch settings. -
Page 31: Function Block "Enduser D.h.w
If the measurement is made with one or 2 thermostats, it is not possible to display the actual value. In that case, the display shows ---. 31/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 6 Function block "Enduser d.h.w."... -
Page 32: Function Block "Enduser General
• As a time switch program for the release of d.h.w. heating • As a time switch program for the multi-functional relay Switching program 2 of the RVL481 affords a maximum of three ON periods per day. Also, every day of week may have different ON periods. -
Page 33: Indication Of Errors
= error number = segment number = device number The error message disappears only after rectification of the fault. There will be no ac- knowledgement! 33/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 7 Function block "Enduser general" 20.05.2008... -
Page 34: Function Block "Plant Type
They will not be displayed. Example for an entry (selection of plant type 1–2) = operating line = Heating circuit plant type 1 = d.h.w. circuit type 2 34/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 8 Function block "Plant type" 20.05.2008... -
Page 35: Function Block "Cascade Slave
Note Automatic boiler sequence changeover according to the number of burner operating hours is not possible with the RVL481 since this controller does not acquire the number of burner operating hours. Boiler management functions must be provided in the cas- cade master. -
Page 36: Function Block "Space Heating
This ensures that no heating will take place in the summer when, under normal 36/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 10 Function block "Space heating"... -
Page 37: Heating Limits
When the ECO function has switched the heating off, the display shows ECO. 37/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 10 Function block "Space heating" 20.05.2008... -
Page 38: Operating Modes And Operating States
• The maximum limit value for the heating-up time • The maximum limit value for optimum shutdown • Quick setback: Yes or no 38/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 10 Function block "Space heating" 20.05.2008... -
Page 39: Process
To ascertain the room temperature generated by the room model, a distinction must be made between 2 cases: • The RVL481 is not in quick setback mode: The room temperature generated by the room model is identical to the current room temperature setpoint •... -
Page 40: Optimum Stop Control
Setpoint of REDUCED room temperature 10.4.5 Optimum stop control During the building's occupancy time, the RVL481 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 lie 0.5 °C below the setpoint of NORMAL heating... -
Page 41: Optimum Start Control
10.4.7 Optimum start control During the building's non-occupancy times, the RVL481 maintains the setpoint of REDUCED heating. Toward the end of the non-occupancy time, optimization switches the control to boost heating. This means that the selected boost will be added to the room temperature setpoint. -
Page 42: Room Functions
-0,5 Heating curve slope ∆TRw Reduction of the room temperature setpoint ∆T Deviation of the room temperature ∆TVw Reduction of the flow temperature setpoint 42/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 10 Function block "Space heating" 20.05.2008... -
Page 43: Room Influence
• Flow temperature setpoint at an outside temperature of +15 °C The basic setting during commissioning is made according to the planning documenta- tion or in agreement with local practices. 43/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 10 Function block "Space heating" 20.05.2008... -
Page 44: Deflection
The heating curve is valid for a room temperature setpoint of 20 °C. 44/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 10 Function block "Space heating" 20.05.2008... -
Page 45: Parallel Displacement Of Heating Curve
– the current flow temperature setpoint is generated. It can be called up on operating line 165 (also refer to chapter “25 Function block "Service functions and general settings""). 45/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 10 Function block "Space heating" 20.05.2008... -
Page 46: Generation Of Setpoint
Demand-compensated control is used with plant types 4 x, 5 x, and 6 The setpoint is delivered to the RVL481 via the data bus (LPB) in the form of a heat de- mand signal. In that case, the outside temperature will not be taken into consideration. 46/118 Siemens Heating and D.h.w. -
Page 47: Function Block "3-Position Actuator Heating Circuit
Minimum limitation is also active during storage tank charging, depending on the kind of priority. With plant types 3–1 and 3-3, where maximum limitation is not active during storage tank charging. 47/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 11 Function block "3-position actuator heating circuit" 20.05.2008... -
Page 48: Setpoint Rise
Owing to the I-part, there is no control offset. The controller’s positioning commands to the actuator of the actuating device are fed to the output relays and indicated by LEDs. 48/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 11 Function block "3-position actuator heating circuit" 20.05.2008... -
Page 49: Excess Mixing Valve Or Heat Exchanger Temperature
In interconnected plants, an excess mixing valve or heat exchanger temperature can be entered on the RVL481. This is a boost of the respective heating zone's flow tempera- ture setpoint. The higher setpoint is delivered to the heat source as the heat demand signal. -
Page 50: Function Block "Boiler
If the return temperature is limited, the display shows This maximum limitation cannot be used as a safety function; for that purpose, thermo- stats, thermal reset limit thermostats, etc., must be used. 50/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 12 Function block "Boiler" 20.05.2008... -
Page 51: Minimum Limitation Of The Boiler Temperature
Actual value of boiler temperature Boiler temperature Burner control signal Note When controlling a single-stage burner, the reset limit of the second stage should be set to zero. 51/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 12 Function block "Boiler" 20.05.2008... -
Page 52: Control With A 2-Stage Burner
Switching differential Boiler temperature setpoint Actual value of boiler temperature 52/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 12 Function block "Boiler" 20.05.2008... -
Page 53: Frost Protection For The Boiler
If the boiler temperature falls below 5 °C, the burner will always be switched on until the boiler temperature has crossed the minimum limit by the amount of the switching differ- ential. 53/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 12 Function block "Boiler" 20.05.2008... -
Page 54: Protective Boiler Startup
Interconnected plant: Critical locking signal Controller 1 Controller 2 Plant type 5-0 Controller 1 switches boiler pump off Controller 3 Critical locking signal 54/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 12 Function block "Boiler" 20.05.2008... -
Page 55: Protection Against Boiler Overtemperatures
12.4.5 Protection against boiler overtemperatures To prevent heat from building up in the boilers (protection against overtemperatures), the RVL481 offers a protective function. When the first burner stage is switched off, the controller allows pump M1 to overrun for the set pump overrun time (operating line 174 on the boiler temperature controller), generating at the same time a forced signal to all loads (inside the controller on the data bus). -
Page 56: Function Block "Setpoint Of Return Temperature Limitation
The minimum limit value is to be set on operating line 101. Setting --- = (inactive) 56/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 13 Function block "Setpoint of return temperature limitation"... -
Page 57: Mode Of Operation With A Single Device (With No Bus)
This means they generate a critical locking signal internally. For response to criti- cal locking signals, refer to section “25.4.7 Gain of locking signal“. 57/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 13 Function block "Setpoint of return temperature limitation"... -
Page 58: Function Block "District Heat
• If the outside temperature is lower than the value set for the start of compensation, the current limit value is calculated according to the following formula: + [(T – T ) × s] [°C] L constant L start 58/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 14 Function block "District heat" 20.05.2008... -
Page 59: Maximum Limitation Of Return Temperature Differential (Drt Limitation)
• optimizes the volumetric flow • is a dynamic return temperature limitation • shaves peak loads • ensures the lowest possible return temperature 59/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 14 Function block "District heat" 20.05.2008... -
Page 60: Integral Action Time
The stroke assigned to the minimum volumetric flow must be acquired by an auxiliary switch fitted in the actuator and delivered to the RVL481. When bridging terminals H4 − M, the valve will close and the waiting time commences. -
Page 61: Function Block "Maximum Limitation Of The Return Temperature, D.h
If the function is active, the display shows This maximum limitation has priority over minimum limitation of the flow temperature. 61/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 15 Function block "Maximum limitation of the return temperature, d.h.w."... -
Page 62: Function Block "Basic Settings D.h.w
121. In an interconnected plant with several controllers, that is, with several heating programs, the circulating pump runs when at least one of the controllers pro- 62/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 16 Function block "Basic settings d.h.w."... -
Page 63: Operation Of Circulating Pump During The Holiday Period
0, 1, 2, or 3 Circulating pump OFF, if all controllers in the interconnected system are in holiday mode 63/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 16 Function block "Basic settings d.h.w." 20.05.2008... -
Page 64: Frost Protection For D.h.w
16.4 Frost protection for d.h.w. The frost protection for d.h.w. provided by the RVL481 is ensured by sensors B3, B31 and B32. The behavior depends on the type of plant. 16.4.1 Frost protection in the d.h.w. storage tank This type of frost protection is used with plant types x–1, x–2, and x–3. It always en- sures a minimum switch-on temperature of 5 °C. -
Page 65: Function Block "Release Of D.h.w. Heating
D.h.w. heating with electric immersion heater D.h.w. heating With all plant types x–5, d.h.w. heating is always released as long as it is switched on. 65/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 17 Function block "Release of d.h.w. heating" 20.05.2008... -
Page 66: Release Programs
0, 1, or 2 No d.h.w. heating when all controllers in the interconnected system are in holiday mode 66/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 17 Function block "Release of d.h.w. heating" 20.05.2008... -
Page 67: Function Block "D.h.w. Priority And Flow Temperature Setpoint
If the consumer master is in segment 0, the uncritical locking signal will be delivered to all controllers in all segments. 67/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 18 Function block "D.h.w. priority and flow temperature setpoint"... -
Page 68: Shifting Priority
With d.h.w. heating, the temperature setpoint of the common flow for the d.h.w. and the heating circuit is that required for the d.h.w. circuit. 68/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 18 Function block "D.h.w. priority and flow temperature setpoint"... - Page 69 65 °C. With d.h.w. charging, the setpoint of the common flow temperature will then be that of the d.h.w. circuit, namely 65 °C. 69/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 18 Function block "D.h.w. priority and flow temperature setpoint"...
-
Page 70: Function Block "D.h.w. Storage Tank
In that case, changeover to the electric immersion heater would take place at midnight at the latest, after 48 hours of operation. 70/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 19 Function block "D.h.w. storage tank"... -
Page 71: Temperature And D.h.w. Switching Differential
From the 2 tables above, it is obvious that when using 2 sensors, it is irrelevant which of the 2 sensors is fitted at the top and which at the bottom of the d.h.w. storage tank. 71/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 19 Function block "D.h.w. storage tank"... -
Page 72: Boost Of The D.h.w. Charging Temperature
This function raises the d.h.w. temperature periodically, thus mak- ing certain that legionella bacteria will be killed. For description, refer to chapter "23 Function block "Legionella function" 72/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 19 Function block "D.h.w. storage tank" 20.05.2008... -
Page 73: Forced Charging
Sensor B3 Sensor B3 5–1 Sensor B1 Sensor B1 5–2 Sensor B3 Sensor B3 6–1 Sensor B1 Sensor B1 6–2 Sensor B3 Sensor B3 73/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 19 Function block "D.h.w. storage tank" 20.05.2008... -
Page 74: Manual D.h.w. Charging
If d.h.w. heating shall be switched off again after the manual charging, the button must be pressed again after flashing (button extinguishes). If the d.h.w. is heated with an electric immersion heater, manual charging is not possible. 74/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 19 Function block "D.h.w. storage tank" 20.05.2008... -
Page 75: Function Block "3-Position Actuator For D.h.w
This minimizes the strain on the actuator. For safety reasons, the controller delivers a one-minute closing pulse at 10-minute intervals. An opening pulse negates the pulse lock. 75/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 20 Function block "3-position actuator for d.h.w." 20.05.2008... -
Page 76: Function Block "Derivative Action Time D.h.w. Heating Via Heat Exchanger"76
35 °C Integral action time of control (Tn) 35 s Derivative action time of control (Tv) 16 s 76/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 21 Function block "Derivative action time d.h.w. heating via heat exchanger" 20.05.2008... -
Page 77: Function Block "Multi-Functional Relay
Function block "Multi-functional relay" The RVL481 features a multifunctional relay whose function is selected on this block. This relay is also used for controlling an electric immersion heater for d.h.w. heating. This means that if the parameters of the controller are set to "Electric heater for d.h.w. -
Page 78: On / Off According To The Time Switch
In that case, the multifunctional relay is always de-energized. 22.2.4 Relay energized in the event of fault If, at the RVL481, a fault status message is present, either from the controller itself or from the data bus (LCD displays ), the multifunctional relay will be energized. -
Page 79: Function Block "Legionella Function
• When choosing “0”, the legionella function does not act on the d.h.w. circulating pump • When choosing “1”, the legionella function acts on the d.h.w. circulating pump 79/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 23 Function block "Legionella function"... -
Page 80: Mode Of Operation
If a maximum d.h.w. charging time is set, it also acts here. If the legionella setpoint is not reached, the legionella function is interrupted and resumed at the end of the maxi- mum charging time. 80/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 23 Function block "Legionella function" 20.05.2008... -
Page 81: Function Block "Switching Program 3
24.2 Function Switching program 3 of the RVL481 affords a maximum of 3 ON periods per day. Also, every day of week may have different ON periods. As with the heating program, it is not switching times that are entered, but periods of time during which the program or the controlled function shall be active. -
Page 82: Function Block "Service Functions And General Settings
• Parallel displacement (setting on operating line 72) With demand-compensated control (plant types 4–x, 5–x, and 6–x), the display shows ---. 82/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 25 Function block "Service functions and general settings" 20.05.2008... -
Page 83: Heating Curve
Flow temperature setpoint (generated via the heating curve) 25.2.3 Hours run counter The number of controller operating hours is displayed. Whenever operating voltage is present, the RVL481 counts the hours. The maximum reading is limited to 500,000 hours (57 years). 83/118 Siemens Heating and D.h.w. -
Page 84: Software Version
The types of room units that can currently be used with the RVL472 carry the following numbers: 82 = QAW50 83 = QAW70 The RVL481 ignores room units that cannot be used (e.g. QAW20) and generates an error message (error code 62). 25.3 Commissioning aids 25.3.1 Simulation of the outside temperature... -
Page 85: Sensor Test
B6 Faults in the measuring circuits are displayed as follows: = short-circuit (thermostat: contact closed) = open-circuit (thermostat: contact open) 85/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 25 Function block "Service functions and general settings" 20.05.2008... -
Page 86: Test Of H-Contacts
25.4 Auxiliary functions 25.4.1 Frost protection for the plant The plant can be protected against frost. For this purpose, the RVL481 and the heat source equipment must be ready to operate (mains voltage present!). The following settings are required: • The outside temperature at which frost protection shall respond •... -
Page 87: Manual Overriding Of Operating Mode (Contact H1)
(approx. 0.5 Hz). The buttons themselves are however inop- erable. Once this function is deactivated, the RVL481 will resume the operating mode previ- ously selected. With plant types 4–x, 5–x, and 6–x, contact H1 only acts on the d.h.w. circuit. -
Page 88: Pump Kick
In case of a defined value of the uncritical locking signal, the heating circuit pump will be deactivated, independent of the set locking signal gain. In plants with changeover valve, the valve assumes the "D.h.w.” position 88/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 25 Function block "Service functions and general settings" 20.05.2008... -
Page 89: Entries For Lpb
25.5.1 Source of time of day Depending on the master clock, different sources for the time of day can be used. The source must be entered on the RVL481, on operating line 178, using setting 0…3: 0 = autonomous clock in the RVL481 1 = time of day from the bus;... -
Page 90: Outside Temperature Source
If an inadmissible address has been entered, an error message will appear (error code 140). For detailed information about the addressing of devices, refer to Data Sheet N2030. 90/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 25 Function block "Service functions and general settings" 20.05.2008... -
Page 91: Bus Power Supply
25.5.5 Bus loading number The bus loading figure E for the LPB of the RVL481 is 7. The total of all E-numbers of the devices connected to the same bus may not exceed the limit of 300. -
Page 92: Function Block "D.h.w. Solar Charging
Function block "D.h.w. solar charg- ing" The RVL481 supports solar d.h.w. heating with the d.h.w. plant types 1, 2, 3 and 5. The function is activated on operating line 126 by selecting the d.h.w. temperature sensor. This always enables solar d.h.w. charging, carried out via the collector pump based on the temperature differential between d.h.w. -
Page 93: Minimum Charging Temperature
(and if the required switch-on differential is reached) by the switch-on differen- tial (SD – SD TKol > TLmin + (SD – SD 93/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 26 Function block "D.h.w. solar charging" 20.05.2008... -
Page 94: Minimum Runtime
• The frost protection function is stopped if d.h.w. storage tank temperature drops below 8 °C. Setting --- switches off the collector frost protection function. 94/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 26 Function block "D.h.w. solar charging" 20.05.2008... -
Page 95: Collector Temperature To Protect Against Overheating
The switching differential for recooling (SDON) corresponds to the value of the switch- on differential (operating line 201) of charge control, but is limited to min. 3 K for recool- ing. 95/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 26 Function block "D.h.w. solar charging" 20.05.2008... -
Page 96: Evaporation Temperature Of Heat Carrier
Setting --- switches off the pump protection function. The heat carrier evaporation protection (pump off) takes priority over overheating pro- tection which would switch on the pump. 96/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 26 Function block "D.h.w. solar charging" 20.05.2008... -
Page 97: Maximum Limitation Of Charging Temperature
The storage tank is never charged in excess of the set temperature (refer to section "26.2.5 Collector temperature to protect against overheating"). Caution The storage tank maximum limitation function is not a safety function! 97/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 26 Function block "D.h.w. solar charging" 20.05.2008... -
Page 98: Collector Start Function Gradient
1 °C. TKol t < Grad TKol Collector temperature Grad Gradient ON/OFF Collector pump Temperature Time Setting --- switches off the collector start function. 98/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 26 Function block "D.h.w. solar charging" 20.05.2008... -
Page 99: Function Block "Locking Functions
To make the link across H3–M inaccessible, the controller can be sealed to prevent its removal. Refer to chapter “29 Handling". 99/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 27 Function block "Locking functions" 20.05.2008... -
Page 100: Communication
Combination with room units 28.1.1 General • Room units can be used with the RVL481 only if one of the plant types 1–x, 2–x, or 3–x has been selected on the controller • The room temperature acquired by a room unit is adopted by the RVL481 at terminal A6. -
Page 101: Combination With Room Unit Qaw70
From the QAW70, the heating circuit’s operating mode of the RVL481 can be overrid- circuit's operating mode den. This is accomplished with the operating mode button and the economy button. To enable the room unit to act on the RVL481, the following operating conditions must be satisfied: • AUTO mode for heating circuit •... - Page 102 If 1 (slave with no remote operation) is entered on operating line 178 ("Source of time of Effect of individual day") of the RVL481, the time of day on the QAW70 cannot be changed. QAW70 operating lines on the RVL481...
-
Page 103: Combination 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 the LPB to the RVL481 where it produces an appropriate change of the flow temperature setpoint. -
Page 104: Handling
Pointer for Info button (display of temperatures) Display of temperatures, times, etc. Display of the current heating program Display of operational level Display of the current operating line number 104/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 29 Handling 20.05.2008... -
Page 105: Analog Operating Elements
An operating line with an associated number is assigned to each parameter, each actual value and each optional function. The selection of an operating line and readjustment of the display is always made with a pair of buttons. 105/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 29 Handling 20.05.2008... -
Page 106: Setting Levels And Access Rights
Also, he can access operating lines 1 to 50 • The heating engineer can access all operating elements and all operating lines 106/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 29 Handling 20.05.2008... -
Page 107: Commissioning
Commissioning 29.2.1 Installation instructions The RVL481 is supplied with Installation Instructions which give a detailed description of installation, 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 108: Electrical Installation
• The cables from the controller to the regulating unit and the pump carry mains voltage • The cables to the sensors must not be run parallel to mains carrying cable (e.g. power supply for the pump) (protection class II EN 60730) 108/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 29 Handling 20.05.2008... -
Page 109: Engineering
D.h.w. mixing valve / valve OPEN D.h.w. mixing valve / valve CLOSED In addition to the standard connection terminals, there are 2 auxiliary terminals for N and available. 109/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 30 Engineering 20.05.2008... -
Page 110: Connection Diagrams
Actuator for heating circuit, with contact for minimum stroke limitation Actuator of changeover valve Actuator for d.h.w. circuit Wire link for locking the district heat parameters Multifunctional output 110/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 30 Engineering 20.05.2008... -
Page 111: Mechanical Design
The cover can be sealed; cover and housing are provided with lugs for introduction of a safety wire. The RVL481 has standard overall dimensions of 144 × 144 mm. It can be mounted in one of 3 different ways: • Wall mounting •... -
Page 112: Technical Data
<95 % r.h. <95 % r.h. (non-condensing) (non-condensing) Mechanical conditions class 3M2 class 2M2 class 1M2 Use above sea level max. 3000 m above sea level 112/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies 32 Technical data 20.05.2008... - Page 113 (heating curve) ....45 operating mode ............104 display of positioning commands ......104 DRT limitation............59 CE conformity ............111 central unit OZW30 ..........102 113/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Index 20.05.2008...
- Page 114 .........32 integral..............52 function block enduser space heating .......29 interconnected plant ..........49 function block legionella function.......78 function block locking functions.........98 key features .............. 11 114/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Index 20.05.2008...
- Page 115 .............52 operating mode continuously REDUCED heating ..22 room influence............43 operating state ............24 room model ............25, 39 operation ..............103 room model temperature...........39 operational level............24 115/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Index 20.05.2008...
- Page 116 / summertime changeover ......87 simulation of the outside temperature .......83 wintertime ............32, 87 slope of maximum limitation ........58 wiring ..............106 software version ............83 source of time of day ..........88 116/118 Siemens Heating and D.h.w. Controller RVL481 CE1P2541en Building Technologies Index 20.05.2008...
- Page 117 117/118 Siemens Building Technologies Heating and D.h.w. Controller RVL481 CE1P2541en HVAC Products Index 20.05.2008...
- Page 118 Building Technologies Group Subject to alteration International Headquarters Gubelstrasse 22 CH – 6301 Zug Tel. +41 41 724 24 24 Fax +41 41 724 35 22 www.sbt.siemens.com 118/118 Siemens Building Technologies Heating and D.h.w. Controller RVL481 CE1P2541en HVAC Products 20.05.2008...