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Summary of Contents for Specified Controls SC-UT32-NS
- Page 1 Universal Thermostat For HVAC Systems and Zoning Installation Instructions SC-T32-P Version 3.0...
- Page 2 This manual is to be used in conjunction with the supplied User Manual. Although great care has been taken in the preparation of this manual, Specified Controls takes no responsibility for errors or omissions contained herein. It is the responsibility of the installer to ensure that this thermostat and the equipment connected to it operate in a safe and efficient manner.
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Page 3: Getting Started
GETTING STARTED As with any HVAC project, careful installation is the key to a successful outcome. Time taken during the installation process will be rewarded with fewer call-backs. The steps required to install the SC-T32-P thermostat are as follows: 1. Read and understand this Installation Manual and Operation Manual. 2. - Page 4 INSTALLING THE THERMOSTAT Pull the control wires through the large opening in the thermostat subbase. Next, level and mount the subbase on the wall using the supplied anchors and screws. Do not over tighten the mounting screws as the subbase may warp causing the improper seating of the thermostat connecting pins to MOUNTING HOLES...
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Page 5: Special Instructions For Dual Fuel Applications
SPECIAL INSTRUCTIONS FOR DUAL FUEL APPLICATIONS When the SC-T32-P is used with dual fuel systems, an outdoor sensor is recommended for balance point control (Model SC-T32-S1). The sensor is wired to the TT terminals on the thermostat. In the Advanced Installer Settings, set TT = OA. This configures the thermostat to receive the outdoor temperature information. -
Page 6: System Switch Functions
SYSTEM SWITCH FUNCTIONS Sw1 - Equipment Type Switch 1 sets the equipment type. For heat / cool equipment, set the switch to the OFF position (factory default). For heat pump equipment, set the switch to the ON position. Sw2 - Equipment Stages Switch 2 sets the equipment stages. -
Page 7: Typical System Wiring Diagrams
TYPICAL SYSTEM WIRING DIAGRAMS HEAT OR COOL ONLY HEAT 1 FAN 1 MODBUS RELAY RELAY TERMINALS COMP 1 RELAY 24 V LINE Switch Settings Sw1 = OFF (Heat/Cool) Sw2 = OFF (Single Stage) Sw3 = OFF (Not Applicable) Sw4 = OFF (Not Applicable) Sw5 = Equipment Type (OFF = Equipment Controls Fan - Gas) -
Page 8: Heat / 1 Cool Heat Pump
TYPICAL SYSTEM WIRING DIAGRAMS 2 HEAT / 2 COOL HEAT 2 HEAT 1 FAN 1 MODBUS RELAY RELAY RELAY TERMINALS COMP 2 COMP 1 RELAY RELAY LINE 24 V Switch Settings Sw1 = OFF (Heat/Cool) Sw2 = ON (Multi-stage) Sw3 = OFF (Not Applicable) Sw4 = OFF (Not Applicable) -
Page 9: Heat / 2 Cool Heat Pump
TYPICAL SYSTEM WIRING DIAGRAMS 3 HEAT / 2 COOL HEAT PUMP FAN 1 MODBUS HEAT VALVE RELAY TERMINALS COMP 2 COMP 1 RELAY RELAY LINE 24 V Switch Settings Sw1 = ON (Heat Pump) Sw2 = ON (Multi-stage) Sw3 = OFF (Conventional Heat Pump) Sw4 = Reversing Valve (OFF = ‘O’)) -
Page 10: Heat / 2 Cool Dual Fuel
TYPICAL SYSTEM WIRING DIAGRAMS 3 HEAT / 2 COOL DUAL FUEL FOSSIL FAN 1 MODBUS FUEL VALVE RELAY TERMINALS COMP 2 COMP 1 RELAY RELAY 24 V LINE Switch Settings Sw1 = ON (Heat Pump) Sw2 = ON (Multi-stage) Sw3 = ON (Dual Fuel) Sw4 = Reversing Valve (OFF = ‘O’) - Page 11 ADVANCED INSTALLER SETTINGS MENU Symbol Default Function Maximum Heating Setpoint Limit Adjustable from 41° F - 120° F Minimum Cooling Setpoint Limit Adjustable from 43° F - 122° Temperature Display CF=F - Fahrenheit CF=C - Celsius Internal Sensor Calibration Adjustable +/- 9° F in 0.2° F increments Time Format TC=12 - 12 Hour Time TC=24 - Military Time...
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Page 12: Tt Terminal Functions
ADVANCED INSTALLER SETTINGS MENU Symbol Default Function 19.2 Baud Rate BD=4.8 BD=9.6 BD=19.2 Commissioning Mode CD=0 - OFF CD=1 - All internal time delays are overridden This function must be reset to CD=0 to prevent equipment from short cycling Factory Test TS=0 - Test Mode OFF Do not change this function without reading the Factory Test Mode instructions on Page 27... -
Page 13: Indoor Sensor Wiring
TT TERMINAL FUNCTIONS INDOOR SENSOR WIRING When the SC-T32-S1 is used as an indoor sensor, the SC-T32-P can be configured to allow only the remote sensor to control SC-T32-S1 SENSOR the temperature (TT=RS) or both the remote and onboard sensor can be used for temperature averaging (TT=AV). -
Page 14: Testing Fan Operation
TESTING Testing ensures that the thermostat and the HVAC equipment operate properly. Follow the detailed testing steps and refer to the Troubleshooting Guide in this manual if any problems are encountered. When the SC-T32-P is powered, the LCD will briefly show all available LCD icons, software version, then display the time and operating mode, etc. -
Page 15: Adaptive Recovery
TESTING Press the MODE button until Mode Cool appears on the LCD. Use the ( ) button and lower the setpoint a few degrees below the space temperature. The cooling and fan relays will energize and the word Cool will change to Cooling. If the thermostat has been configured for multi-stage operation, lower the setpoint further and the second stage cooling relay will energize. -
Page 16: Basic Troubleshooting
BASIC TROUBLESHOOTING SYMPTOM POSSIBLE FAULT AND REMEDY No LCD display Remove thermostat from subbase and check for 24 Volts across ‘24’ and ‘24C’. Make sure the factory jumper is between ‘R’ and ‘24’. If no voltage, check voltage at HVAC system terminals ‘R’... -
Page 17: Remote Sensor Installation Instructions
REMOTE SENSOR INSTALLATION INSTRUCTIONS The SC-T32-P can use an indoor remote sensor or multiple sensors for temperature averaging, or as an outdoor sensor for temperature display or a control function depending upon the thermostat configuration. INDOOR SENSOR INSTALLATION Locate the sensor in the same manner as a thermostat. Mount the sensor 18” away from any outside wall. -
Page 18: Specifications
SPECIFICATIONS Input Voltage 24 VAC 50/60 Hz Relay Rating 24 VAC @ 1Amp maximum per relay Operating Temperature 32° F to 122° F Operating Relative Humidity 0-95% (non-condensing) Storage Temperature 32° F to 105° F Size 4-7/16” W x 4-1/16” H x 7/8” D LCD Display Size 2-3/4”...
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