Room Temperature Controller with LCD

Transcription

1 3 053 Room Temperature Controller ith LCD for 4-pipe fan coil units for compressors in DX type equipment ith reversing valve Outputs for on / off valve actuators Outputs for 2-stage compressor ith reversing valve Outputs for a 3-speed fan Control depending on the room or the return air temperature Operating modes: Normal, Economy and Standby Operating mode changeover input for remote control Function for avoiding damage resulting from moisture Selectable installation and control parameters Display of room temperature or setpoint selectable Minimum and maximum setpoint limitation Operating voltage RDF30 Use Typical use: For control of the room temperature in individual rooms that are heated or cooled ith 4-pipe fan coil units For the control of rooms that are cooled ith DX type equipment and reversing valve For opening or closing a valve For sitching a 3-speed fan CEN3053en Siemens Building Technologies HVAC Products

2 Functions The controller acquires the room temperature via its integrated sensor or external room temperature sensor QAA32 or, if used, via an external return air temperature sensor QAH and maintains the setpoint by delivering 2-position valve control or compressor output commands The sitching differential is 2 K in heating mode and K in cooling mode (adjustable parameters) Fan operation The fan is sitched to the selected speed via control output Q, Q2 or Q3 Water-based fan coil application (heating mode) Water-based fan coil application (cooling mode) When function Temperature-dependent fan control is activated (can be selected ith DIP sitch no), the fan is sitched on / off depending on the temperature, that is, together ith the valve or compressor It is sitched off hen leaving the heating or cooling sequence, provided function Temperature-dependent fan control is activated manually changing to Standby, provided no setpoints (eg for frost protection) have been adjusted and are active activating an external operating mode changeover sitch, provided plant conditions do not call for Economy mode turning off the controller s poer supply When used in connection ith 4-pipe fan coils, set DIP sitch no 4 to Used in conjunction ith 2 valves, for heating and cooling operation The heating valve receives the OPEN command via control output Y hen the acquired room temperature lies by half the sitching differential belo the setpoint, and 2 the heating valve has been fully closed for more than minute (parameter P20) The heating valve receives the CLOSE command via control output Y hen the acquired room temperature lies by half the sitching differential above the setpoint, and 2 the heating valve has been fully open for more than minute (parameter P9) The cooling valve receives the OPEN command via control output Y2 hen the acquired room temperature lies by half the sitching differential plus the dead zonel (P2) above the setpoint (x + Xdz + ½ SDC), and 2 the cooling valve has been closed for more than minute (parameter P20) The cooling valve receives the CLOSE command via control output Y2 hen the acquired room temperature lies by half the sitching differential plus the dead zonel (P2) belo the setpoint (x < + Xdz - ½ SDC) 2 the cooling valve has been open for more than minute (parameter P9) Compressor-based 2-stage cooling application (st stage) When using 2-stage cooling, set DIP sitch no 4 to Compressor C receives the command via control output Y hen 2/0 HVAC Products

3 Compressor-based 2- stage cooling application (2nd stage) the acquired room temperature lies by half the sitching differential above the set point, and 2 compressor C has been for more than minute (parameter P20) Compressor C receives the command via control output Y hen the acquired room temperature lies by half the sitching differential belo the set point, and 2 compressor C has been for more than minute (parameter P9) Compressor C2 receives the command via control output Y2 hen the acquired room temperature lies by half the sitching differential plus the setpoint differential (P8) above the setpoint (x + SD + ½ SDC), and 2 compressor C2 has been for more than minute (parameter P20) Compressor C2 receives the command via control output Y2 hen the acquired room temperature lies by half the sitching differential plus the setpoint differential (P8) belo the setpoint (x < + SD - ½ SDC) 2 compressor C2 has been for more than minute (parameter P9) Compressor-based application ith reversing valve (heating mode) Compressor-based application ith reversing valve (cooling mode) When using heating and cooling DX ith a reversing valve, set DIP sitch no 4 to and connect outputs Y and Y2 to control the compressor Compressor C receives the command via control output Y hen the measured room temperature lies by half the sitching differential belo the setpoint, and 2 compressor C has been for more than minute (parameter P20) Compressor C receives the command via control output Y hen the acquired room temperature lies by half the sitching differential above the set point, and 2 compressor C has been for more than minute (parameter P9) Compressor C receives the command via control output Y2 hen the acquired room temperature lies by half the sitching differential plus the dead zone (P2) above the setpoint (x + Xdz + ½ SDC), and 2 compressor C has been for more than minute (parameter P20) Compressor C receives the command via control output Y2 hen the acquired room temperature lies by half the sitching differential plus the dead zone (P2) belo the setpoint (x < + Xdz - ½ SDC) 3 compressor C has been for more than minute (parameter P9) 3/0 HVAC Products

4 Water-based fan coil heating and cooling mode Y [Y2] 0 ½ SDH Y2 [Y22] X dz ½ SDH ½ SDC ½ SDC 3023D0 T SDH SDC Xdz Y Y2 Y2 Y22 Room temperature Sitching differential "Heating" Sitching differential "Cooling" Dead zone Room temperature setpoint Manipulated variable "Heating valve" Reverse of Y Manipulated variable "Cooling valve" Reverse of Y2 Compressor-based 2-stage cooling Y[Y2] SD 0 ½ SDC ½ SDC ½ SDC ½ SDC Y2 [Y22] 3023D02 T SDC SD Y Y2 Y2 Y22 Room temperature Sitching differential "Cooling" Setpoint differential Room temperature setpoint Manipulated variable "Compressor stage " Reverse of Y Manipulated variable "Compressor stage 2" Reverse of Y2 Compressor-based -stage heating and -stage cooling ith reversing valve Y 0 Y2 ½ SDH HEAT Xdz ½ SDH ½ SDC COMPRESSOR COOL ½ SDC 3023D03 T SDH SDC Xdz Y Y2 Y2 Y22 Room temperature Sitching differential "Heating" Sitching differential "Cooling" Dead zone Room temperature setpoint Manipulated variable "Compressor Heating stage" Reversing valve output Heating Manipulated variable "Compressor Cooling stage" Reversing valve output Cooling Y22 CTACT CLOSED CTACT OPEN Y2 CTACT CLOSED CTACT OPEN Return air temperature (optional) The RDF30 provides control either depending on the acquired room temperature or depending on the fan coil unit s return air temperature Changeover is automatic if a QAH cable temperature sensor is connected 4/0 HVAC Products

5 Operating modes Normal mode Economy mode The folloing operating modes are available: Heating or cooling mode ith automatic changeover and ith manually selected fan speed III, II or I In Normal mode, the controller maintains the adjusted setpoint in heating mode and, in cooling mode, a temperature level represented by the setpoint plus the dead zone A changeover sitch can be connected to status input D-GND When the sitch closes (due to an open indo, for instance), the operating mode ill change from Normal to Economy In this operating mode, the relevant setpoints of heating or cooling are maintained (control parameters P0 and P02) The operating action of the sitch (NC or NO) can be selected Standby The relevant setpoints of heating and cooling are maintained hen in Standby, provided such setpoints have been adjusted (control parameters P03 and P04) Avoiding damage due to moisture(optional) To avoid damage due to moisture in very arm and humid climatic zones resulting from lack of air circulation in energy saving mode (eg in hotel rooms during unoccupied periods), the fan can be kept running in Economy mode hen activating parameter P7 In this case, the fan keeps running at the selected speed or at speed if the operating mode selector is in Standby Setting the control parameters Settings A number of control parameters can be set to optimize the control performance These parameters can also be set during operation ithout opening the unit In the event of a poer failure, all control parameters set ill be maintained The parameters can be changed as follos: Set the operating mode selector to Standby 2 Press buttons + and simultaneously for 3 seconds Release them and, ithin 2 seconds, press button + again for 3 seconds Then, the display ill sho P0 3 Select the required parameter by repeatedly pressing buttons + and -: P0 P02 P20 P2 3055z0 Control parameters 4 By pressing buttons + and simultaneously, the current value of the selected parameter appears, hich can be changed by repeatedly pressing buttons + and 5 By pressing buttons + and simultaneously again or 5 seconds after the last press of a button, the last parameter ill be displayed again 6 If you ish to display and change additional parameters, repeat steps 3 through seconds after the last display or setting, all changes ill be stored and the controller returns to Normal mode Parameter Meaning Setting range P0 P02 P03 P04 Setpoint of heating in Economy mode (operating mode changeover contact activated) Setpoint of cooling in Economy mode (operating mode changeover contact activated), 5 20 C (in increments of 05 K), 2 35 C (in increments of 05 K) Setpoint of heating in Standby, 5 20 C (in increments of 05 K) Setpoint of cooling in Standby, 2 35 C (in increments of 05 K) Factory setting 6 C 28 C P05 Minimum setpoint limitation in Normal mode 5 20 C (in increments of 05 K) 5 C 8 C HVAC Products /0

6 P06 Maximum setpoint limitation in Normal mode 2 35 C (in increments of 05 K) 35 C P07 P08 Heating / cooling changeover sitching point cooling Heating / cooling changeover sitching point heating (No setting and no display) 6 C (No setting and no display) 28 C P09 Sensor calibration C (in increments of 05 K) 0 K P0 P P-band in heating mode or sitching differential heating P-band in cooling mode or sitching differential cooling K (in increments of 05 K) K (in increments of 05 K) P2 Dead zone in Normal mode 055 K (in increments of 05 K) 2 K P3 P4 P7 Active temperature sensor (no setting, display only) Value of current room temperature reading (no setting, display only) Fan control in Economy mode : Fan is off in the dead zone / : Fan is on in the dead zone : Room temperature sensor active 2: Return air temperature sensor active 0 49 C = current temperature value - : Running at the selected speed or at speed if in Standby P8 Setpoint differential 05 5 K (in increments of 05 K) 2 K P9 Minimum output on time (Y, Y2) 20 minutes (in increments of min) min P20 Minimum output off time (Y, Y2) 20 minutes (in increments of min) min P2 Fan overrun 0300 seconds (in increments of 0 s) 0 s 2 K K - Ordering When ordering, please give name and type reference The QAH temperature sensor (used as a return air temperature sensor) and zone valves are to be ordered as separate items Equipment combinations Mechanical design Type of unit Type reference Data Sheet Cable temperature sensor QAH 840 Room sensor QAA Electromotoric on / off actuator SFA Thermal actuator (for radiator valve) STA Thermal actuator (for small valves 25 mm) STP The unit consists of 2 parts: Plastic housing hich accommodates the electronics, the operating elements and the built-in room temperature sensor Base The housing engages in the base and is secured ith 2 scres The base carries the scre terminals The DIP sitches are located at the rear of the housing 6/0 HVAC Products

7 Setting and operating elements Legend Set of DIP sitches Display of the room temperature, setpoints or control parameters 2 Symbol used hen displaying the current room temperature 3 Normal mode Economy mode 4 Cooling valve open Fan on Heating valve open 5 Buttons for adjusting the setpoints and the control parameters 6 Operating mode selector (Standby, heating or cooling mode ith manual selection of the fan speed) DIP sitch no Meaning Position (factory setting) Position Fan control Fan control is temperatureindependent in Normal mode 2 Display of temperature or setpoint 3 Operating action of sitch for external operating mode changeover Room (return air) temperature display Changeover activated hen sitch is closed (NO) Fan control in is temperaturedependent in all operating modes Setpoint display 4 Output sequence Heating and cooling (4-pipe) 2-stage cooling Changeover activated hen sitch is open (NC) Accessories Description Adapter plate 20 x 20 mm for 4 x 4 conduit boxes Adapter plate 96 x 20 mm for 2 x 4 conduit boxes Adapter plate for surface iring 2 x 30 mm Type reference ARG70 ARG70 ARG702 Engineering notes Mounting, installation and commissioning notes Mounting location: On the all or inside the fan coil unit Not in niches or bookshelves, not behind curtains, above or near heat sources and not exposed to direct solar radiation Mounting height is about 5 m above the floor The connecting ires can be run to the controller from a recessed conduit box HVAC Products /0

8 Check the settings of the DIP sitches and change them, if required After applying poer, the controller makes a reset during hich the fan LCD segments flash, indicating that the reset has been correctly made This takes about 3 seconds Then, the controller is ready to operate The cables used must satisfy the insulation requirements ith regard to mains potential Sensor input B-M carries mains potential If the sensor s cables must be extended, the cables used must be suited for mains voltage The controller is supplied ith Mounting Instructions Calibrating the sensor If the room temperature displayed by the controller is inconsistent ith the room temperature effectively measured, the temperature sensor can be recalibrated In that case, parameter P09 must be changed Technical data Poer supply Operating voltage +0/ 5 % Frequency 50/60 Hz Poer consumption max 6 VA Operational data Environmental conditions Control outputs Q, Q2, Q3-N Rating Control outputs Y, Y2-N (NO) Y2, Y22-N (NC) Return air temperature sensor status input B-M Status input D and GND Operating action selectable Contact sensing Insulation against mains Perm cable length ith copper cable 5 mm 2 for connection to terminals B, B2 and D max 6(4)A max 5(3)A QAH, safety class II NTC resistor 3 kω at 25 C normally open (NO) normally closed (NC) SELV DC 6 5 V / 3 6 ma 4 kv, reinforced insulation 80 m Setpoint setting range 535 C Control deviation at 25 C max ±05 K Sitching differential in heating mode (adjustable) 2 K Sitching differential in cooling mode (adjustable) K Dead zone X dz in Normal mode (adjustable) 2 K Setpoint «Economy mode», heating (adjustable) 6 C Setpoint «Economy», cooling (adjustable) 28 C Setpoint «Standby», heating (adjustable) 8 C Setpoint «Standby», cooling (adjustable) Operation Climatic conditions Temperature Humidity to IEC class 3 K C <95 % rh 8/0 HVAC Products

9 Norms and standards Transport Climatic conditions Temperature Humidity Mechanical conditions Storage Climatic conditions Temperature Humidity conformity to EMC directive Lo voltage directive to IEC class 2 K C <95 % rh class 2M2 to IEC class K C <95 % rh 89/336/EEC 73/23/EEC General Connection terminals N474 C-Tick conformity to EMC emission standard Product standards Automatic electrical controls for household and similar use Special requirements on temperature dependent controls Electromagnetic compatibility Emissions Immunity AS/NSZ 425:994 EN EN EN EN Devices of safety class II to EN Pollution class normal Degree of protection of housing IP 30 to EN Connection terminals solid ires or prepared stranded ires 2 x 04-5 mm 2 or x 25 mm 2 Weight 023 kg Colour of housing front hite, NCS S 0502-G (RAL 9003) L B M DGND N Q Q2 Q3 Y2 Y N Y22 Y2 L, N Operating voltage B M Status input «Return air SELV temperature sensor or external room temperature sensor QAA32» Measuring neutral «Return air temperature sensor or external room temperature sensor QAA32» D, GND Status input for potential-free operating mode changeover sitch (operating action can be selected) 3053G0 Q Q2 Q3 Y Y2 Y2 Y22 Control output Fan speed I Control output Fan speed II Control output Fan speed III Control output Heating valve (NO contact) or output for compressor Control output Heating AC 230V (NC contact) or reversing valve output Control output Cooling valve (NO contact) or output for compressor Control output Cooling AC 230V (NC contact) or reversing valve output 9/0 HVAC Products

10 Connection diagram Application: 4-pipe fan coil units L N 0 A QAH / QAA32 B L B M D GND N Q Q2 Q3 Y2 Y N Y22 Y2 N I II 6(4)A max III M Y 5(3)A max S Y2 5(3)A max B Return air temperature sensor (QAH) or external room temperature sensor (QAA32) M 3-speed fan N Room temperature controller RDF30 S External operating mode changeover sitch Y Zone valve for heating mode Y2 Zone valve for cooling mode Application: 2-stage cooling compressors in DX type equipment L N 0 A QAH / QAA32 B L B M D GND N Q Q2 Q3 Y2 Y N Y22 Y2 N I II 6(4)A max III M C 5(3)A max S C2 5(3)A max B Return air temperature sensor (QAH) or external room temperature sensor (QAA32) M 3-speed fan N Room temperature controller RDF30 S External operating mode changeover sitch C Compressor C2 Compressor Application: Compressors in DX-type equipment ith reversing valve L N 0 A QAH / QAA32 L B M D GND I II 6(4)A max B III RV 5(3)A max S N Q Q2 Q3 Y2 Y N Y22 Y2 N M C 5(3)A max 3050A36 B Return air temperature sensor (QAH) or external room temperature sensor (QAA32) M 3-speed fan N Room temperature controller RDF30 S External operating mode changeover sitch C Compressor RV Reversing valve Dimensions Controller Base , M M02 0/ Siemens Building Technologies Ltd Subject to alteration HVAC Products