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19 Two-stage furnace and two-stage AC configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer. ViewStat Communicating Thermostat 27J ViewStat Installation and Wiring NOTE Roof top unit (two-stage heat and two-stage cool) configuration. ROOF TOP UNIT 120 ;i VAC ie: гЩ i I VAC ....... FAN RELAY Black (common) (from MiniVerter) 24V FIELD WIRING FACTORY WIRING OPTIONAL 24V FIELD WIRING (SEE NOTE) NOTE: HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation. If the automation system is to be installed after the HVAC installation, leave the R and C terminals connected to ensure the HVAC system operates. If the automation system is installed before the HVAC wiring, then DO NOT connect HVAC wires to R and C, FIG. 20 Roof top unit (two-stage heat and two-stage cool) configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer. ^28 ViewStat Communicating Thermostat ViewStat Installation and Wiring NOTE Boiler with AC (two transformers) configuration. 24V FIELD WIRING FACTORY WIRING OPTIONAL 24V FIELD WIRING (SEE NOTE) NOTE: HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation. If the Automation system is to be installed after the HVAC installation, leave the R and C terminals connected to ensure the HVAC system operates. If the automation system is installed before the HVAC wiring, then DO NOT connect HVAC wires to R and C. FIG. 21 Boiler with AC (two transformers) configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer. ViewStat Communicating Thermostat 29j ViewStat Installation and Wiring NOTE Single-stage heat pump configuration Black (common) (from MiniVerter) NOTE: HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation. If the automation system is to be installed after the HVAC installation, leave the R and C terminals connected to ensure the HVAC system operates. If the automation system is installed before the HVAC wiring, then DO NOT connect HVAC wires to R and C, REV 1ST VALVE STG COOL COMP. REV VALVE HEAT OUTDOOR HEAT PUMP UNIT - 24V FIELD WIRING .................................. FACTORY WIRING OPTIONAL 24V FIELD WIRING (SEE NOTE) FIG. 22 Single-stage heat pump configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer. ^30 ViewStat Communicating Thermostat ViewStat Installation and Wiring NOTE Two-stage heat pump configuration. r INDOOR HEAT PUMP UNIT NOTE: HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation. If the automation system is to be installed after the HVAC installation, leave the R and C terminals connected to ensure the HVAC system operates. If the automation system is installed before the HVAC wiring, then DO NOT connect HVAC wires to R and C. Black (common) (from MiniVerter) 1ST REV STG VALVE COMP. HEAT OUTDOOR HEAT PUMP UNIT 24V FIELD WIRING FACTORY WIRING OPTIONAL 24V FIELD WIRING (SEE NOTE) FIG. 23 Two-stage heat pump configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer. ViewStat Communicating Thermostat 31J ViewStat Installation and Wiring NOTE First- stage radiant floor heat, second-stage furnace one stage of cooling configuration. !---------------------- NOTE: HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation. If the Automation system is to be installed after the HVAC installation, leave the R and C terminals connected to ensure the HVAC system operates. If the automation system is installed before the HVAC wiring, then DO NOT connect HVAC wires to R and C. FIG. 24 First-stage radiant floor heat, second-stage furnace one stage of cooling configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer. 24V FIELD WIRING FACTORY WIRING _ . _ . _ . OPTIONAL 24V FIELD WIRING (SEE NOTE) ^32 ViewStat Communicating Thermostat Support Module Installation and Wiring Support Module Installation and Wiring Follow the guidelines for placement of the support modules (as described below), and locate the ViewStat indoors where the operating range of the ViewStat (32° - 99°F/0° - 37°C) will not be violated (i.e. do not install in a cold garage or hot equipment room). Refer to the Support Module Specifications section on page 3 for more information on the modules. The thermostat will display one of the following sets of information: • The remote temperature on the support module at address 1 if its mode is set to ...
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