Siemens Dual Duct Variable Volume with Two Inlet Sensors, 2-Stage Electric Heat, Chilled Ceiling and Hot Water Radiator (Template 14269)

Automation Station Duct Variable Volume with Two Sensors 2 Stage Electric Heat Ceiling and Hot Water Radiator DXR2 x18 14269 Note Infrastructure Building Products of Contents Notes 5 Duct Sequence Configurations 8 case 1 VAV DD Ventilation source in one duct 10 case 2 VAV DD Ventilation in both ducts with mixing control 11 case 3 VAV DD Ventilation in both ducts snap acting control 15 Case 4 VAV DD Dedicated duct for ventilation from DOAS dedicated outside system 19 Case 5 Constant volume DD option with ventilation in both ducts with mixing 20 of Operation Summary 25 Automation Overview 29 Modes 30 Functions 31 Operating Mode Determination 31 33 Operator Unit 35 GreenLeaf 39 40 Coordination Functions for HVAC 40 Operating Mode for VAV 40 GreenLeaf 42 Temperature Setpoint Determination 44 State Determination 45 Ventilation Control 46 Volume Flow Tracking 47 Room Temperature Control for Cooling 47 Room Temperature Control for Heating 47 Ventilation 49 Protection 49 Signals between Room and Room Segment 50 Segment Functions 51 Mode Determination 51 Duct VAV Supply Air Damper Device Mode 51 Coil Device Mode 52 Control Functions HVAC 52 Duct VAV Supply Air Dampers with 2 inlet pressure sensors 52 Heating Coil 2 Stage HclEl14 61 Hot Water RadHw11 64 Ceiling with Chilled Water CcgChw11 66 Industry Inc Note Infrastructure Building Products Chains for Primary Plants Room 70 Chain Coordination Supply Air Group Member 71 deviation signal 71 Duct Saturation signal 71 input signal 71 Duct AHU changeover condition signal 72 72 and Outputs 74 Point Database 75 Industry Inc Note Infrastructure Building Products Duct Sequence Configurations Notes Notes document should be used in conjunction with the VAV Start up document and the Application Help in ABT Site Application Help describes types installed in the ABT Site library and lists all configuration items in a specific template or type to find Application help in ABT Site understand how to access Application Help click the Help button in ABT Site right and go to Configuration Application configuration see Title and application template is factory preloaded into the DXR2 automation station it can also be manually loaded using ABT Site A template can be used as a point for the creation of other similar templates using ABT Site or adjusting parameters and setpoint values does not require a new number but if a physical input or output is changed a new 5 digit number should be assigned parameters and settings can be modified to meet specific jobsite such as room setpoints room airflow rates room operating modes timing and so on Important parameters fall into two main categories Individual BACnet configuration values such as setpoints for room temp and air ABT Inside commissioning parameters such as those used for air component or to tailor features of selected application functions the default application does not meet job requirements an application can be and modified to job specifications using ABT Site Room Room segment concept with the Room Room segment concept will be helpful when reading document See the Room segment topic under Technical principles in ABT help Industry Inc Note Infrastructure Building Products Notes Duct Sequence Configurations Duct Variable Volume with Two Inlet Sensors 2 Stage Electric Heat Chilled Ceiling Hot Water Radiator Template 14269 on DXR2 x18 application modulates the supply air dampers of the dual duct terminal box for cooling and ventilation Terminal box airflow is maintained at the larger of ventilation airflow or heating or cooling airflows chilled ceiling device is active during cooling When in heating the 2 stage electric heating sequence with the hot duct supply damper to maintain room temperature at setpoint analog outputs for damper control 1DMPR POS 2DMPR POS are modulated by respective PID controllers Two binary outputs activate the stages of electric heat HTG EL 1ST HTG 2ST Additionally a modulating output commands the hot water radiator RAD V POS and a AO commands the chilled ceiling device PANL C POS10 duct can be configured to provide hot cold or both airflow and the source for ventilation can be configured to come from cold duct hot duct or both Additionally the transition heating and cooling is configurable for hot cold airflow mixing control or snap acting See Dual Duct Configurations for detailed information on these topics Diagram air volume supply air air temperature sensor monitoring and diagnostics