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Room Thermostat with Display, for VAV
RDG400
Basic Documentation
Edition: 1.0
CE1P3182en
28 May 2009 Building Technologies
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Table of contents 1 About this document ......................................................................................... 3 1.1 Revision history.................................................................................................... 3 1.2 Reference documents .......................................................................................... 3 1.3 Before you start..................................................................................................
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1 About this document 1.1 Revision history Edition Date Changes Section Pages 1.0 May 2009 First edition 1.2 Reference documents Ref. Document title Type of document Document No. [1] Wall-mounted room thermostat with LCD Data sheet CE1N3182en [2] RDG400 Operating Instructions CE1B3182en [3] RDG400 Mounting Instructions CE1M3182en 1.3 Before you start 1.3.1 Copyright This document may be duplicated and distributed only with the express permission of Siemens, and may be
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1.3.3 Document use / request to the reader Before using our products, it is important that you read the documents supplied with or ordered at the same time as the products (equipment, applications, tools etc.) carefully and in full. We assume that persons using our products and documents are authorized and trained appropriately and have the technical knowledge required to use our products as intended. More information on the products and applications is available: • On the intranet
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2 Summary 2.1 Brief description Applications • Single-duct system • Single-duct system with electrical heater • Single-duct system and radiator / floor heating • Single-duct system with heating / cooling coil Features • Two multifunctional inputs and one digital input for keycard contact, external sensor, etc. • Operating modes: Comfort, Energy Saving and Protection • Automatic or manual heating/cooling changeover • Adjustable commissioning and control parameters • Minimum and ma
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2.3 Equipment combinations Data Description Product no. Sheet Cable temperature sensor QAH11.1 1840 Room temperature sensor QAA32 1747 Condensation detector / extension QXA2000 / 1542 module AQX2000 DC 0..10 V actuator Electrical actuator, DC 0..10 V SSA61... 4893 (for radiator valve) Electrical actuator, DC 0..10 V SSC61… 4895 (for 2 and 3 port valves / V…P45) Electrical actuator, DC 0..10 V SSP61… 4864 (for small valve 2,5 mm) Electrical actuator, DC 0..10 V
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3-position actuators Electrical actuator, 3-position SSA81... 4893 AC 24 V (for radiator valve) Electrical actuator, 3-position SSP81… 4864 (for small valve 2,5 mm) Electrical actuator, 3-position SSB81... 4891 (for small valve 5,5 mm) Electrical actuator, 3-position SSD81... 4861 (for Combi-valve VPI45) Electromotoric actuator, 3-position SQS85… 4573 (for valves 5.5 mm) 2.4 Accessories Description Product no. Data Sheet Changeover mounting kit (50 pcs / package)
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4 Functions 4.1 Temperature control General note Setting of the control parameters (P01 etc., mentioned throughout the document) is described in section 4.12. The thermostat acquires the room temperature via built-in sensor, external room temperature sensor (QAA32), or external return air temperature sensor (QAH11.1), and maintains the setpoint by issuing actuator control commands to heating and/or cooling equipment. The following control outputs are available: • Modulating PI / P
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4.2 Operating modes Select the thermostat's operating mode via operating mode button on the thermostat or operating mode input (e.g. keycard occupancy sensor, when X1, X2, or D1 set to 3 (P38, P40, P42). A corresponding setpoint is used to maintain the room temperature at the desired level depending on the active operating mode. The following operating modes are available: In Comfort mode, the thermostat maintains the setpoint which can be adjusted via Comfort mode the rotary knob.
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4.3 Setpoints Comfort mode The setpoint in Comfort mode can be adjusted via the rotary knob. Setpoint limitation For Energy Saving purposes, the setpoint adjusting range can be limited to minimum (P09) and maximum (P10). P09 < P10 • If the minimum limit P09 is set lower than the maximum limit P10, both heating and cooling are adjustable between these two limits. P09 ≥ P10 • For heating or cooling applications (e.g. single duct; single duct & H/C coil) – The setting range in
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4.4 Setpoints and sequence In single-duct changeover applications the Comfort setpoints for heating and cooling sequence are the same (w). In applications with electrical heater, radiator or heating / cooling coil the Comfort setpoint is at the heating sequence. The start of the cooling sequence is linked to “Dead-zone” above the Comfort setpoint. The dead zone can be set via parameter P33. The setpoints for Energy Saving and Protection mode are below the Comfort setpoints (heating)
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Comfort mode Energy Saving mode Application Heating mode Cooling mode Heating mode Cooling mode YHC YHC YHC YHC Y Y Y Y Single duct with heating / cooling coil W W W W T T W CoolEco T W CoolEco T HeatEco HeatEco Protection mode Heating mode Cooling mode YHC YHC Y Y W T W T W CoolProt W CoolProt HeatProt HeatProt W=Setpoint in Comfort mode W = Setpoint heating in Energy Saving or Protection mode HeatEco/Prot W = Setpoint cooling in Energy Saving or Protec
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4.5 Applications overview The thermostat supports the following applications, which can be configured via DIP switches at the rear of the unit. The control output for the damper actuator is either DC 0…10 V (factory setting) or 3-position (see parameter P47), and for the heating / cooling output ON/OFF, PWM, 3-position or DC 0…10 V. Application DIP switch Control output Single-duct DC 0…10 V • DC 0…10 V damper actuator • 3-position damper actuator M V ON YV OFF 1 2 3 4
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4.6 Additional features Output signal inversion The output signals DC 0…10V can be inverted by means of DIP switch 4 (see section 4.7.3). Min / Max air flow To ensure a minimum or maximum supply air volume, the output signal for the air flow (DC 0...10V or 3-position) can be limited to a minimum value via parameter P63 and to a maximum value via parameter P64. Both values can be set between 0% and 100%. Changeover T Room temperature Y10 Y10 Control output XpH XpC H C 10
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X2 X2 Contact open heating mode T M M Contact closed cooling mode 3076Z03 QAH11.1 T °C The sensor or switch can be connected to the input terminal X2 (factory setting) or X1 or D1 (switch only), depending on the commissioning of the inputs (P38, P40, P42). See also section 4.9 “Multifunctional input”. External / return air The thermostat acquires the room temperature via built-in sensor, external room temperature sensor temperature sensor (QAA32), or external return air temperatu
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Button lock If the button lock function is enabled by parameter P14, then the buttons will be locked or unlocked by pressing the right button for 3 sec. If “Auto lock” is configured, then the thermostat will automatically lock the buttons 10 sec after the last adjustment. Operating mode The thermostat can be forced into Energy Saving mode, e.g. when a window is switchover contact opened. The window contact can be connected to digital input D1 (or (Window contact) multifunctional inp
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4.7 Control sequences 4.7.1 Applications and sequences Application VAV Sequences h ( \ ), c ( / ) Single duct el.h + c ( \ / ) Single duct & electrical heater rad + c ( r\ / ), Single duct & radiator h + c ( \ / ) Single duct with heat/cool coil 4.7.2 Sequences overview (setting via parameter P01) The sequence can be set via parameter P01, if available. The thermostats can be used in systems featuring: • Heating only mode (P01=0) • Cooling only mode (P01=
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4.7.3 Control outputs overview (setting via DIP 4 / 5 and parameters P46 / P47) Control outputs Application Single duct Single duct and electrical heater Single duct and radiator / floor heating Single-duct heating / cooling coil The function of the control outputs is set via DIP switches 4 and 5: ON ON ON ON OFF OFF OFF OFF 12 3 4 5 12 3 4 5 12 3 4 5 12 3 4 5 DIP 4: Y10 = 0 … 10 V 0 … 10 V 10 … 0 V inverted 10 … 0 V inv DIP 5: Y1 / Y2 = 2-p
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4.7.4 Single duct Single duct, In single duct applications, the controller controls an actuator (valve, damper, VAV heating or cooling system, etc) – in heating/cooling mode with changeover (automatic or manual), – heating only mode, – or cooling only mode. Cooling only is factory set (P01=1). The output signal for the air flow can be limited to a minimum and maximum value if required (see section 4.6 "additional features"). Modulating control 3-position, PWM or DC 0 … 10 V
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4.7.5 Single duct with electrical heater Single duct with electrical In single duct applications with electrical heater, the thermostat controls a valve heater plus an auxiliary electrical heater. Parameter P01 is not available. The output signal for the air flow can be limited to a minimum and maximum value if required (see section 4.6 "additional features"). Electrical heating, The air flow starts to rise when the acquired room temperature is above "setpoint" active in cooling m
