Room Automation Station Dual Duct Variable Volume with Two Inlet Sensors, 2-Stage Electric Heat, Chilled Ceiling and Hot Water Radiator (on DXR2.
Table of Contents Application Notes .............................................................................................................. 5 Dual Duct Sequence Configurations ................................................................................... 8 Use case 1: VAV DD - Ventilation source in one duct ....................................... 10 Use case 2: VAV DD - Ventilation in both ducts, with mixing control.................
Supply Chains for Primary Plants / Room..................................................................... 70 Supply Chain Coordination - Supply Air: Group Member .................................................. 71 Airflow deviation signal ....................................................................................... 71 Dual Duct Saturation signal ................................................................................ 71 Relief input signal .............................................
Application Notes Dual Duct Sequence Configurations Application Notes This document should be used in conjunction with the VAV Start-up document (A6V10665935) and the "Application Help" in ABT Site. Application Help describes application types installed in the ABT Site library and lists all configuration items found in a specific template or type.
Application Notes Dual Duct Sequence Configurations Overview 14269 Dual Duct Variable Volume with Two Inlet Sensors, 2-Stage Electric Heat, Chilled Ceiling and Hot Water Radiator: Template 14269 (on DXR2.x18). This application modulates the supply air dampers of the dual duct terminal box for cooling, heating, and ventilation. Terminal box airflow is maintained at the larger of ventilation airflow or the heating or cooling airflows. A chilled ceiling device is active during cooling.
Application Notes Dual Duct Sequence Configurations QMX3.P34 / QMX3.P74 Features T° ✔ Room air quality sensor ✔ LCD multi display ✔ Green Leaf LED ✔ Comfort Button ✔ Heat/Cool Status ✔ Room Operating Mode ✔ Rapid Ventilation ✔ NOT AVAILABLE WITH DUAL DUCT Present setpoint ✔ Displays Comfort or pre-Comfort setpoint – or last in effect. (P74 only) CAUTION Nominal air volume flow (AirFlNom) AirFlNom must be understood and set correctly.
Application Notes Dual Duct Sequence Configurations Dual Duct Sequence Configurations Note Default settings assign Duct 1 as cold duct and Duct 2 as hot duct, but these assignments are configurable / reversible if desired or required. The following examples use the default assignments for cold duct and hot duct (use case 4 is special case, see below).
Application Notes Dual Duct Sequence Configurations Color legend for graphics: • Red = heating • Blue = cooling • Green = ventilation • Yellow = total air flow Ventilation Ventilation Control Use source in deadband strategy case Cold duct only Cold duct -- 1a Hot duct only Hot duct -- 1b Both ducts Cold duct Hot duct Last duct Mixing control 2a Snap acting 3a Mixing control 2b Snap acting 3b Mixing control 2c Snap acting 3c Schedule 9 Siemens Industry, Inc.
Application Notes Dual Duct Sequence Configurations Use case 1: VAV DD - Ventilation source in one duct In use case 1 configurations, the mechanical equipment consists of a multiple fan AHU with separate elements for heating and cooling air distribution. The hot and cold air streams are drawn from different sources and driven by separate fans. Outside air ventilation is provided in either the hot duct or the cold duct, not both.
Application Notes Dual Duct Sequence Configurations Use Case 1b – VAV DD with ventilation in hot duct only (Duct 2): Hot duct does not close if ventilation re- Hot duct may close if ventilation require- quirement remains constant. ment goes to zero.
Application Notes Dual Duct Sequence Configurations cording to the relative costs of providing hot air or cold air. For example, if it takes more energy to provide hot air, then it makes sense to use cold air for ventilation in the deadband. If energy costs are approximately equal, then "last duct" configuration may be preferable. Mixing control vs. Snap acting control – Some people associate mixing hot and cold air flows in the dual duct box with wasting energy.
Application Notes Dual Duct Sequence Configurations On an increase in heating load, the heating flow demand on the hot duct modulates from heating flow min to heating flow max. Cold duct air flow will be the value of the difference between hot duct air flow and the current ventilation flow demand, provided that the ventilation flow demand is greater than hot duct air flow, otherwise cold duct air flow will be zero.
Application Notes Dual Duct Sequence Configurations rent value of ventilation flow demand, provided that the ventilation flow demand is greater than cold duct air flow, otherwise hot duct air flow will be zero. Use Case 2c – VAV DD with ventilation in both ducts, last duct ventilation in deadband, with mixing control: Last active duct will stay open in deadband Ducts may close if ventilation requirement to meet a ventilation requirement. Outside goes to zero.
Application Notes Dual Duct Sequence Configurations to cooling flow max. Cold duct air flow will be the greater of vent demand and cooling demand. Hot duct air flow will be zero. (Cold duct remains the active duct.) • Exiting deadband on a call for heat when last duct is the cold duct and CtlStrgy = Mixing control; On an increase in heating load, the heating flow demand on the hot duct modulates from heating flow min to heating flow max.
Application Notes Dual Duct Sequence Configurations Use Case 3a – VAV DD with ventilation in both ducts, cold duct ventilation in deadband, snap acting control: Cold duct will stay open in deadband to Ducts may close if ventilation requirement meet ventilation requirement. On an exit to goes to zero. heating, the cold duct closes immediately and the hot duct takes over ventilation needs.
Application Notes Dual Duct Sequence Configurations Use Case 3b – VAV DD with ventilation in both ducts, hot duct ventilation in deadband, snap acting control: Hot duct will stay open in deadband to meet Ducts may close if ventilation requirement ventilation requirement. On an exit to cool- goes to zero. ing, the hot duct closes immediately and the cold duct takes over ventilation needs.
Application Notes Dual Duct Sequence Configurations Use Case 3c – VAV DD with ventilation in both ducts, last duct ventilation in deadband, snap acting control: Last active duct will stay open in deadband Ducts may close if ventilation requirement to meet ventilation requirement. For behav- goes to zero. ior outside of deadband see additional information below.
Application Notes Dual Duct Sequence Configurations If the last active duct = hot duct, then when the system exits the temperature deadband the behavior is as follows: • Exiting deadband on a call for heat when last duct is the hot duct and CtlStrgy = Snap acting; On an increase in heating load, the heating flow demand on the hot duct modulates from heating flow min to heating flow max. Hot duct air flow will be the greater of vent demand and heating demand. Cold duct air flow will be zero.
Application Notes Dual Duct Sequence Configurations In use case 4, all ventilation is handled in Duct 2 by dedicated outside air system (DOAS). Minimum ventilation levels can be specified per room occupancy mode. When configured for DCV (demand control ventilation) an increase in ventilation flow is provided in response to room IAQ (CO 2) setpoints configured per occupancy mode. Temperature control is provided by Duct 1 and may include optional heating or cooling coils.
Application Notes Dual Duct Sequence Configurations Use Case 5a – Constant volume DD option, ventilation in both ducts, mixing control, with cold duct ventilation in deadband VntSprtDdband = Duct 1, example 1: VntSprtDdband = Duct 1, example 2: Cold duct stays at constant max volume Cold duct stays at constant max volume during cooling and deadband to provide the during cooling and deadband with an addi- elevated minimum ventilation setting.
Application Notes Dual Duct Sequence Configurations Parameter configuration for use case 5a: • VavSuChovrCnd1 = Cooling • VavSuChovrCnd2 = Heating • VntDuctSprt = Both ducts • CtlStrgy = Mixing control • VntSprtDdband = Duct 1 (mixing will occur at/during setpoint for Duct 2 hot duct) • Minimum ventilation parameter(s)* = desired CV flow *In the room AF for ventilation control (VavVntCtl) set min vent parameter for Comfort mode (AirFlMinRCmf) to desired CV flow; the min vent setpoint object in
Application Notes Dual Duct Sequence Configurations Use Case 5b – Constant volume DD option, ventilation in both ducts, mixing control, and hot duct ventilation in deadband VntSprtDdband = Duct 2, example 1: VntSprtDdband = Duct 2, example 2: Hot duct stays at constant max volume Hot duct stays at constant max volume during heating and deadband to provide the during heating and deadband with an addi- elevated minimum ventilation setting.
Application Notes Dual Duct Sequence Configurations Parameter configuration for use case 5b: • VavSuChovrCnd1 = Cooling • VavSuChovrCnd2 = Heating • VntDuctSprt = Both ducts • CtlStrgy = Mixing control • VntSprtDdband = Duct 2 (mixing will occur at/during setpoint for Duct 1 cold duct) • Minimum ventilation parameter(s)* = desired CV flow *In the room AF for ventilation control (VavVntCtl) set min vent parameter for Comfort mode (AirFlMinRCmf) to desired CV flow; the min vent setpoint object i
Application Notes Sequence of Operation – Summary Sequence of Operation – Summary Overview This application modulates the supply air dampers of the dual duct terminal box for cooling, heating, and ventilation. Terminal box airflow is maintained at the larger of ventilation airflow or the heating or cooling airflows. A chilled ceiling device is active during cooling. When in heating, the 2-stage electric heating coils sequence with the hot duct supply damper to maintain room temperature at setpoint.
Application Notes Sequence of Operation – Summary Room operating modes The operating mode of the controlled space is applied according to schedule or room occupant input. The room operating modes are: ⚫ Comfort (occupied) ⚫ Pre-Comfort (standby) ⚫ Economy (unoccupied) ⚫ Protection (e.g. extended holiday) Comfort mode is applied per schedule via central command for each VAV box.
Application Notes Sequence of Operation – Summary ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ CLG STPT EFF – Present cooling setpoint (PrSpC) RM TEMP STPT – Room temperature setpoint (SpTR) RM TEMP SHFT – Room temperature setpoint shift (SpTRShft) CMF CLG STPT – Cooling setpoint for comfort (SpCCmf) CMF HTG STPT – Heating setpoint for comfort (SpHCmf) STBY C DELTA – Delta cooling setpoint for pre-comfort (DSpCPcf) STBY H DELTA – Delta heating setpoint for pre-comfort (DSpHPcf) ECO CLG STPT – Cooling setpoint for economy (SpC
Application Notes Sequence of Operation – Summary Dual Duct VAV Box Sequence with 2-Stage E-heat a) Cooling – When the room temperature [RM TEMP EVAL] rises above the effective cooling setpoint [CLG STPT EFF], the chilled radiant ceiling device is activated and the cold duct supply damper modulates from the cooling or vent flow minimum (whichever is larger) to the cooling flow max to satisfy CLG STPT EFF.
Room Automation Overview Sequence of Operation – Summary Room Automation Overview To ensure building controls can be optimized by central systems, primary systems and individual room automation, it is essential that: ⚫ Individual BACnet objects are grouped together to facilitate optimization of building systems. ⚫ Room operating functions are governed by the following room automation operating modes: Room operating mode, Plant operating mode, and HVAC device mode.
Room Automation Overview Operating Modes Operating Modes Room operating mode (ROpMod) is determined by central functions (for example, scheduler) and can be overwritten by a local presence button on the room unit.
Room Functions Room Operating Mode Determination Room Functions Room Operating Mode Determination Overview The ROpModDtr application function (AF) calculates the Room operating mode (ROpMod) and makes it available to the coordinated Room segment AFs.
Room Functions Room Operating Mode Determination Setting TiCmfBtn to 0 will disable the Comfort button. If the Presence button is configured, setting TiCmfBtn to 0 only disables the timer; in this case, Comfort mode remains in effect until the next schedule change unless the Presence button is pressed again. Outputs: ROpModDtr outputs the following: ⚫ ROpMod - The room operating mode is distributed to HVAC, lighting and shading AFs.
Room Functions Room Operating Mode Determination Examples of trigger response: Source / action Trigger / value Response (Example; results depend on configuration) Comfort button / Eco → Cmf CmfCndTrg / 3:Manual HVAC: No impact Lighting: On (starts constant lighting control) Shading: Stops automatic function Comfort button / Cmf → Eco EefCndTrg / 3:Manual HVAC: Resets any previous manual setpoint adjustment. See note for how to eliminate reset.
Room Functions Room Operating Mode Determination Description Parameter Default value ManOpLockCnf 3:Protection / Economy Pre-Comfort / Comfort. All impacts to HVAC operation are considered (such as window contact, presence detector, manual fan and setpoint adjust). (c) Manual operation lock Manual operation lock configuration → During the indicated room operating modes, manual HVAC operation is locked and Comfort cannot be increased, therefore energy efficiency is maintained.
Room Functions Room Operator Unit Room Operator Unit The following display and operating functions are available based on device configuration. If multiple room operator units are used, the last input wins.
Room Functions Room Operator Unit Display outside air temperature: Only the outside temperature is displayed. Navigation: , Key 1: Display room & outside air temp.: The room temperature and the outside temperature are displayed. Toggling between the values is enabled. This setting is only meaningful if the room temperature sensor is enabled. Navigation: , Key 1: Room unit, display humidity ✳ Room unit, display humidity defines which relative humidity values can be displayed.
Room Functions Room Operator Unit from all room segments combined into a Room configuration. Navigation: , Key 1: Display outside air quality: The air quality of the outside is displayed. Navigation: , Key 1: Note: This setting is only meaningful if a value for the air quality of the outside is available. Display room & outside air quality: The air quality of the room and of the outside are displayed. Toggling between the values is enabled.
Room Functions Room Operator Unit Enable operation: fan speed setpoint ✳ Enable operation: fan speed setpoint defines if the fan speed is displayed and if the user can change the fan speed. Yes: The fan speed is displayed and you can change it. Key 3: No: The fan speed is not displayed and you cannot change it. Enable operation: room humidity setpoint ✳ Enable operation: room humidity setpoint defines if the relative humidity setpoint is displayed and if the user can change it.
Room Functions Room GreenLeaf If user does not manually press key 8 a second time, presence / Comfort expire after a configurable delay (default 120 minutes). No: The user cannot confirm his presence by pressing Key 8. Enable operation: room op.mode ✳ Enable operation: room op.mode defines if the room climate operating mode is displayed and if the user can change it. Yes: The room climate operating mode is displayed and you can change it.
Room Functions Room Coordination Functions for HVAC – ⚫ HVAC: The Maximum tolerance for manually shifting the room temperature setpoint can be configured. Fan speed and room operating mode: No configuration. Their values cannot exceed the automatic values. – Lighting and shading: No configuration. Lighting setpoints and shading positions cannot be less energy efficient than the automatic values.
Room Functions Room Coordination Functions for HVAC Enum PltOpMod Plant Mode Purpose Action of Mechanical Equipment unoccupied period. Ventilation reduced or off selected by configuration. Configurable. Example: Shut schedule/ occ sensor off ventilation for conference rooms that are unoccupied during the normally occupied daytime hours. Trigger(s) 4 Pre-Comfort Conserve energy for brief unoccupied periods. 5 Comfort Provide room air conditions All space conditioning suitable for room occupancy.
Room Functions Room Coordination Functions for HVAC The Table below shows the different room and central BAS functions that determine the plant mode for the VAV application templates. NOTE: If an input is not configured in the application, it is NOT USED in determining the plant mode state.
Room Functions Room Coordination Functions for HVAC – The leaf icon on the room operator unit turns red If the user sets a higher fan speed than is required by the automatic control. Outputs: This AF (HvacGrnLf11) provides the Room energy efficiency indication HVAC (RHvacEei) to the room operator unit via the Room green leaf (RGrnLf) AF.
Room Functions Room Coordination Functions for HVAC Room Temperature Setpoint Determination This application function provides the Comfort heating/cooling setpoints (either the setpoint (SpTR) or the setpoint shift (SpTRShft)) for the PID controllers in the room temperature control AFs (TCtlH, TCtlC).
Room Functions Room Coordination Functions for HVAC Parameters Description Object Preloaded value Operating command for energy efficiency condition trigger at automatic 1:None 2:Automatic 3:Manual OpCmdEefAuto 2:Automatic Operating command for energy efficiency condition trigger at manual Enumeration (see OpCmdEefAuto) OpCmdEefMan 1:None Display absolute room temperature setpoint 1:Average value 2:Present value SpTRAbsDspy 2:Present value Heating/Cooling State Determination The Heating/cooling
Room Functions Room Coordination Functions for HVAC Configuration Parameters Description Object Pre-loaded Values Shift of switch-on point for heating state ShftOnPtHSta 0.0 ºF Shift of switch-on point for cooling state ShftOnPtCSta 0.0 ºF Switch-on delay for heating/cooling changeover DlyOnHCChovr 2 mins VAV Ventilation Control There are different control modes for the ventilation control. The behavior is selectable by parameter and is dependent on if a room air quality sensor is available.
Room Functions Room Coordination Functions for HVAC Air Volume Flow Tracking The application function Air volume flow tracking (AirFlTck) collaborates with VAV supply and extract dampers to calculate the extract airflow setpoint. NOTE: Air volume flow tracking application function is NOT enabled in any Dual Duct, VAV or FPB terminal box application templates.
Room Functions Room Coordination Functions for HVAC NOTE: The VAV with hot water or electric heating coil application has been pre-loaded to support the Supply air VAV damper and the heating coil valve or stages of electric heat. If the default application does not meet job requirements, an application can be configured and modified to job specifications in ABT Site. This application function works in collaboration with a room segment temperature control AF.
Room Functions Room Coordination Functions for HVAC 5. RadDevMod = 3:Full Open These data points are then released from warm-up once room temperature returns to the Comfort deadband (70°F to 75°F, default). Rapid Ventilation (Optional – requires additional configuration in ABT Site) The fan speed button at the room operator unit allows the occupant to increase the ventilation rate in the room when the room operating mode (ROpMod) is in Comfort.
Coordinating Signals between Room and Room Segment Coordinating Signals between Room and Room Segment Information Shared From To Room control functions request cooling, heating or ventilation from room segment devices. Request is the output of the room control function PIDs in percent (%). Request signal to room segment device. Binary availability of Room segment devices Room segment devices informs room to respond to request from room control control function that it is available for function.
Room Segment Functions Device Mode Determination Room Segment Functions Device Mode Determination Depending on the plant operating mode, each device is assigned a device operating mode (DevOpMod). Examples include control, fully open, fully closed, and off.
Room Segment Functions Device Control Functions HVAC Device Duct 1 Duct 2 (common setpoint for both ducts) (common setpoint for both ducts) mode ctrl.
Room Segment Functions Device Control Functions HVAC Main features: ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ ⚫ VAV supply damper modulation (2) for dual duct temperature and ventilation control Two inlet flow sensors Air volume flow setpoint calculation (2) Air volume flow calculation (2) Selectable ducts for hot air or cold air (hot, cold, or neither) Mixing control or snap acting control Selectable duct(s) for ventilation air (one, both, or neither) Dedicated outdoor air system (DOAS) support Control coordination for extr
Room Segment Functions Device Control Functions HVAC Interlocks Interlocks are (typically) binary signals that ensure equipment protection. Additional signals help coordinate the interaction sequences between HVAC devices. A signal's direction In / Out (and function, to some degree) depend on the HVAC device. For example, an airflow status (AirFlSta) interlock signal can be output from a supply damper or a fan, and sent as input to a coil or an OA damper.
Room Segment Functions Device Control Functions HVAC Description Object Object Type Pre-loaded Value Supply air VAV dimension A 1 Supply air VAV dimension A 2 VavSuDmsnA1 VavSuDmsnA2 ACnfVal 8.0 in. Supply air VAV dimension B 1 Supply air VAV dimension B 2 VavSuDmsnB1 VavSuDmsnB2 ACnfVal 8.0 in. Supply air VAV flow coefficient 1 Supply air VAV flow coefficient 2 VavSuFlCoef1 VavSuFlCoef2 ACnfVal 0.63 (0.
Room Segment Functions Device Control Functions HVAC Description Parameter Pre-loaded Value Hysteresis for air volume flow state (1 and 2) HysAirFlSta 2% Enable monitoring for fan state → Must = 0:No for parallel fan EnMonFanSta powered box applications; must = 1:Yes for series fan powered box applications.
Room Segment Functions Device Control Functions HVAC CAUTION Duct size must be considered when setting AirFlNom For all application version numbers, when AirFlNom is used (i.e., set to a non zero value), duct size must be considered. Example: a 6-inch round duct (approx 0.2 sq ft) with a typical maximum velocity of 3000 ft/min suggests a nominal air volume flow of 600 cfm (3000 ft/min * 0.2 sq ft = 600 cfm (approximately 300 lps)).
Room Segment Functions Device Control Functions HVAC ⚫ ⚫ ⚫ ⚫ Flow coefficient value for calibration at a specific airflow setpoint Duct area in units compatible with the units conversion constant Nominal airflow value (user entered) Hood air volume flow value to aid in calculating the correct flow coefficient value First, air velocity is a calculated value computed from logic using the following formula: Where: ⚫ AirVEngrgUnits is the velocity of the air in engineering units that are compatible with the
Room Segment Functions Device Control Functions HVAC Airflow Sequencing and Airflow Limits The VAV airflow controller adjusts airflow to accomplish cooling and ventilation, and to support heating from the heating coil. Each function has an operating range selected by the engineer to satisfy particular physical objectives. This design separates minimum cooling flow and minimum heating flow from the flow rate needed for ventilation.
Room Segment Functions Device Control Functions HVAC The airflow setpoint signal (VavSuSpAirFl), while on its way to zero, falls below the airflow demand hysteresis setting (HysAirFlDmd). When these conditions are true, the boolean supply fan coasting signal (FanSuCstVal) will equal 1 (True) and the damper is reset to its last (previous) operating position / value. This keeps the damper open while the fan coasts down to prevent supply duct over-pressure.
Room Segment Functions Device Control Functions HVAC Electric Heating Coil, 2-Stage (HclEl14) The application function Electric heating coil two stage, two binary outputs operates a pair of electric heating coils to provide 2-stage heating. The main outputs are two binary outputs that work together for two stage operation. NOTE: The Electric heating coil (2-Stage) receives the heating request signal from the room temperature control for heating PID controller.
Room Segment Functions Device Control Functions HVAC Interlocks Interlocks are (typically) binary signals that ensure equipment protection. Additional signals help coordinate the interaction sequences between HVAC devices. A signal's direction In / Out (and function, to some degree) depend on the HVAC device. For example, an airflow status (AirFlSta) interlock signal can be output from a supply damper or a fan, and sent as input to a coil or an OA damper.
Room Segment Functions Device Control Functions HVAC Equipment Safety - High Temperature Cut-out Switch The electric heating coil control logic is configured for heating coil overtemperature detection input (HclOvrTDet) from a high temperature cut-out switch. When the switch activates, the coil is commanded off at equipment protection priority and a signal is sent to the source of airflow to hold / maintain airflow. A timer prevents the source of airflow from stopping until after the timer expires.
Room Segment Functions Device Control Functions HVAC Radiator Hot Water (RadHw11) This application function operates a hot water valve for radiator(s) and supports downdraft compensation. The main output is a modulating output for valve position. Main features: ● Analog control of hot water radiator(s), configurable for power modulation (SCR) or pulse width modulation ● Multiple radiator control (1...
Room Segment Functions Device Control Functions HVAC The following figure(s) illustrates control modulation and related functions. 65 Siemens Industry, Inc.
Room Segment Functions Device Control Functions HVAC Configuration Description Parameter Default value Switch-on point for hot water demand ▶ When the radiant ceiling heating valve position is greater than the switch-on point, the radiant ceiling heating valve enables request hot water for heating.
Room Segment Functions Device Control Functions HVAC Basic function: Accept the request signal from its associated room controller and pass it through a device mode logic switch in the room segment; output the result as a command to the BACnet object that controls the output device. Specifically, the Radiant ceiling cooling request (RcgCReq) is received from the room and processed in the room segment into an analog output signal for the radiant ceiling (chilled beam) cooling valve position (RcgVlvPosC).
Room Segment Functions Device Control Functions HVAC IF THEN TChwPm < TDwp + TDiffDwpChwMin Valve = closed @prioity 4 TChwPm + TDiffDwpChwMin < TChwPm < TDwp + TDiffDwpChwMin + No action HysTDiffDwpChw TChwPm > TDwp + TDiffDwpChwMin + HysTDiffDwpChw Valve = released from priority 4 Condensation Message (CdnMsg) is a binary output object for the supply chain logic and supports the following states: • Normal (both the condensation monitor and the dew point monitoring cut-off logic output are False) •
Room Segment Functions Device Control Functions HVAC will signal "No" and the next available cooling resource in the temperature control sequence will be activated. For cooling available status to be "Yes", device mode must equal "Control mode" (modulation). Configuration Parameters Description Name Default value Enable condensation monitor input EnCdnMonIn Yes Enable dew point temperature This should only be enabled if the primary chilled water temperature is provided to the controller.
Supply Chains for Primary Plants / Room Device Control Functions HVAC Supply Chains for Primary Plants / Room This function exists to execute group data exchanged between room applications and primary system applications. It communicates with the primary system using standard BACnet objects. There are two ways data can be shared between the primary system and the rooms. These are: ⚫ Read / write to standard BACnet Objects in individual automation stations.
Supply Chains for Primary Plants / Room Supply Chain Coordination - Supply Air: Group Member Supply Chain Coordination - Supply Air: Group Member Airflow deviation signal When the deviation calculation is enabled, a determination is made if the setpoint is greater than the air flow for a period of time an analog deviation value is mode available to the central function for additional control logic or reporting.
Supply Chains for Primary Plants / Room Supply Chain Coordination - Supply Air: Group Member Dual Duct AHU changeover condition signal Each multistate VAV supply changeover condition input signal (VavSuChovrCnd1, VavSuChovrCnd2) comes from the room coordinating function (RCoo). It indicates the current heating / cooling available status for central AHU. Four states are supported: 1. Neither 2. Heating 3. Cooling 4.
Supply Chains for Primary Plants / Room Supply Chain Coordination - Supply Air: Group Member Description Parameter Pre-loaded Value Air volume flow relief → The minimum airflow setpoint for VAV box when its air flow relief object (VavSuAirFlRlf) is set to True. AirFlRlf 0.0 ft3/min 73 Siemens Industry, Inc.
Inputs and Outputs Inputs and Outputs 14269 Input/Output Diagram 74 Siemens Industry, Inc.
14022 Point Database 14269 Point Database The table shows US engineering units and values, and also CA engineering units and values. CA values are shown in parentheses ( ).
14022 Point Database Insta Desigo nce # Name Description Defaul Units t Value Enumeration On Text Off Text ECO HTG STPT ACnfVal 34 SpHEco Heating setpoint for economy 55 (12) DEG F (DEG C) -- -- -- 25 STBY H DELTA ACnfVal 35 DSpHPcf Delta heating setpoint for pre-comfort 2 (1) DEG F (DEG K) -- -- -- 26 CMF H SP EFF PrSpHCmf Present heating setpoint for comfort -- DEG F (DEG C) -- -- -- 27 STBY H SPEFF ACalcVal 37 PrSpHPcf Present heating setpoint for pre-comfort -- DE
14022 Point Database # Descriptor Object Type Insta Desigo nce # Name Enumeration On Text Off Text 50 AIR VEL1EF ACalcVal 691 VavSuAirVE Supply air VAV effective ff1 air velocity 1 -- ft/m (m/s) -- -- -- 51 AIR VOL1SP 1 APrcVal VavSuSpAir Supply air VAV setpoint Fl1 f.air vol.flow 1 -- ft3/m (lps) -- -- -- 52 FLO REL1SP ACalcVal 693 VavSuSpAfl Supply air VAV Rel1 setp.f.rel.air vol.
14022 Point Database Object Type Insta Desigo nce # Name Description Defaul Units t Value Enumeration On Text Off Text VavSuHDm d Supply air VAV heating demand -- PCT -- -- -- ACalcVal 740 VavSuVntD md Supply air VAV ventilation demand -- PCT -- -- -- CMF BTN BPrcVal 0 CmfBtn Comfort button Inactiv -e -- Active Inactive 77 RAPID VENT BPrcVal 2 RpdVnt Rapid ventilation Off -- -- On Off 78 NGT CLG REQ BCalcVal 3 NgtCReq Night cooling request Inactiv -e -- Acti
14022 Point Database # Descriptor Object Type Insta Desigo nce # Name Defaul Units t Value Enumeration On Text Off Text 95 PLNK STATUS CmnEvt 4 PlnkBusSta KNX PL-Link bus state Norma -l 1:Normal 2:IntervAc 3:Fault 4:Alarm 5:FltAlrm -- -- 96 RM STATUS CmnEvt 8 RSta Room state Norma -l 1:Normal 2:IntervAc 3:Fault 4:Alarm 5:FltAlrm -- -- 97 SEGM STATUS CmnEvt 9 RSegmSta Room segment state Norma -l 1:Normal 2:IntervAc 3:Fault 4:Alarm 5:FltAlrm -- -- 98 RM OP MODE MPrcVal
14022 Point Database Object Type Insta Desigo nce # Name Description Defaul Units t Value Enumeration On Text Off Text 105 PLANT OPMODE MPrcVal 23 PltOpMod Plant operating mode Off -- 1:Off 2:Protect 3:Economy 4:PrComfrt 5:Comfort 6:Warm-up 7:CoolDown 8:RmLTProt 9:NUsed1 10:FreeCool 11:NghtCool 12:Vent 13:NUsed2 14:AVlFlOf 15:SmCtPoPr 16:SmCtNgPr 17:Purge -- -- 106 DCV IND EVAL MCalcVa 24 l RAQualInd Room air quality indication Undef -- 1:Undef 2:Poor 3:Okay 4:Good -- -- 107 HC DE
14022 Point Database Object Type Insta Desigo nce # Name 115 VAV MODE MPrcVal 740 VavSuDev Mod 116 1VAV CHGVR MPrcVal 741 VavSuChovr Supply air VAV Cnd1 changeover condition 1 117 2VAV CHGVR MPrcVal 742 118 SU AIR1DMD 119 SU AIR2DMD # Descriptor Description Defaul Units t Value Enumeration On Text Off Text Supply air VAV device mode Off 1:Off 2:CtrlMod 3:MxAiVlFl 4:MnAiVlFl 5:SmCtAFlS -- -- Neithe -r 1:Neither 2:Heating 3:Cooling 4:Neutral -- -- VavSuChovr Supply air VAV Cnd2
14022 Point Database ⚫ ⚫ ⚫ ACalcVal, BCalcVal, MCalcVal – Analog, Binary or Multi-state Calculated Values are virtual inputs (not connected to hardware) that are only written to by the application as result of states or calculations. ACnfVal, BCnfVal, MCnfVal – Analog, Binary or Multi-state Configuration Values are set per job requirements (for example, cooling setpoint for Economy) and are retained after power cycling.
Issued by Smart Infrastructure Building Products 1000 Deerfield Pkwy Buffalo Grove IL 60089 Tel. +1 847-215-1000 Document ID A6V11692055 Edition 2019-04-01 © Siemens Industry, Inc. 2019 Technical specifications and availability subject to change without notice.
