iO HVAC Controls T-32-P2 Universal Thermostat Instruction Manual

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Installation Manual  

T-32-P2 Universal Thermostat  

For Version 2.19 and 2.20  

VIEW FULL SCREEN PDF MANUAL

General	Details
Name	iO HVAC Controls T-32-P2 Universal Thermostat Instruction Manual
Make	iO HVAC Controls
Language	English
Filetype	PDF (Download)
File size	0.36 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• iO HVAC Controls

iO HVAC Controls T-32-P2 Universal Thermostat Instruction Manual Overview

Summary of Contents

• Page 1: Installation manual for T-32-P2 universal thermostat. Applicable for version 2.19 and 2.20.
• Page 2: Introduction This manual should not be left with the owner as it contains installer setup functions which, if not correctly set, may cause damage to the HVAC equipment or seriously affect performance. The T-32-P2 thermostat is intuitive, reliable and easy to install. Using a commonsense approach to the installation will ensure this product is installed properly and to the customer’s satisfaction. Please take time to read and understand this manual so that installation and testing is undertaken in an efficient manner. 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. Due to ongoing product improvements, iO HVAC Controls reserves the right to change the specifications of the T-32-P2 thermostat or its components without notice.
• Page 3: Thermostat location should represent the ambient space temperature. Avoid installing the thermostat in areas with drafts, near the floor, behind doors, or on external walls. Careful installation is key to a successful outcome and will reduce call-backs. Steps required to install the T-32-P2 thermostat include reading the installation and user manuals. Seal the control wire hole to prevent drafts affecting the internal temperature sensor. Mount the T-32-P2 and set the system switches to match the equipment application. Power the thermostat and do not over tighten the mounting screws to avoid warping. Test heating, cooling, and other functions after installation. Refer to typical system wiring diagrams for installation guidance. Use a small coin to disassemble the thermostat from the subbase without stressing the LCD.
• Page 4: Installing the thermostat Terminal designations based on the T-32-P2 slide switch configurations. Some terminals have multiple output functions. Switch settings for various configurations. Typical system wiring diagrams for heat/cool setups. Installer and user preferences for short cycle protection. Options for programmable and non-programmable settings. Minimum run time settings for heating stages. Designations for auxiliary inputs and modbus communications. Equipment controls for fan and heating stages.
• Page 5: HEAT / 1 COOL DUAL FUEL TYPICAL SYSTEM WIRING DIAGRAMS HEAT / 1 COOL HEAT PUMP Switch Settings Sw1 = OFF Sw2 = ON Sw3 = OFF Sw4 = Reversing Valve Sw5 = Installer Preference Sw6 = User Preference Sw7 = Installer Preference HEAT / 2 COOL DUAL FUEL HEAT / 2 COOL HEAT PUMP Switch Settings Sw1 = OFF Sw2 = ON Sw3 = ON Sw4 = Reversing Valve Sw5 = Installer Preference Sw6 = User Preference
• Page 6: System switch functions are essential for configuring the thermostat to match specific HVAC systems. For dual fuel applications, an outdoor sensor is recommended for balance point control. High and low balance point settings can be adjusted in the Advanced Installer Settings. Switch 2 sets the equipment configuration for heat/cool or heat pump systems. Switch 3 determines the equipment stages, with options for single or multi-stage equipment. Switch 4 sets the fan logic for heat/cool systems or the reversing valve configuration for heat pumps. The T-32-P2 includes a battery that maintains the time of day during power failures. Switch 6 configures the thermostat operation as programmable or non-programmable. Switch 7 sets a minimum run time, while switch 8 allows for separate heating and cooling setpoints. The factory default settings for each switch are crucial for proper thermostat operation.
• Page 7: Entering the advanced installer settings menu allows access to factory defaults for all advanced installer settings. To enter the menu, push the O/RIDE button once and hold it down for 15 seconds until 88:15 is displayed on the LCD. Adjust the value to 88:32 to enter the menu. Fan control options include programmable modes that affect how the fan operates during heating or cooling cycles. The keyboard lock PIN is required for future entry into the advanced installer setup menu. Fan purge settings are adjustable from 0 to 5 minutes after a heating or cooling cycle. The mode can be set for heating, cooling, or both, with specific configurations for button locks. Maximum heating and cooling limits are adjustable, affecting user setpoints. Freeze protection can be enabled to activate heating if the room temperature falls below 41°F. Override setpoints for heating and cooling can be adjusted within specified temperature ranges.
• Page 8: Advanced installer settings menu Start/Stop mode controlled by thermostat program 1.4° F differential for stage 1 Thermostat in Start only mode per call by Modbus Master Factory test mode OFF Upstage timer adjustable from 10 - 90 minutes Adaptive recovery ON Remote sensor calibration adjustable +/- 9° F High balance point only works if TT=OA with outdoor sensor Replace or clean filter
• Page 9: Remote on/off or override can be configured using an external dry contact switch. The T-32-P2 thermostat can turn off or change heating and cooling setpoints to a pre-programmed override value. When the T-32-S1 is used as an indoor sensor, it can allow only the remote sensor to control the temperature or use both for temperature averaging. An optional in-line switch can change the temperature sensing location from remote to onboard sensor. To turn the thermostat off, set TT=OF in the Advanced Installer menu. For remote override, set TT=OC in the Advanced Installer menu, replacing user setpoints with pre-programmed override setpoints. Multiple sensors can be connected for temperature averaging, with a total value of remote sensors wired in series/parallel equaling 10kΩ @ 77°F. Testing ensures that the thermostat and HVAC equipment operate properly, following detailed steps in the manual. For three sensors, a combination of T-32-S2 and T-32-S1 sensors can be wired in series/parallel. To include or exclude the onboard sensor in averaging, set TT=AV or TT=RS, respectively.
• Page 10: Resetting the time delays can be done by setting CD=1 in the Advanced Installer menu. After testing, re-initiate time delays by setting CD=0. The T-32-P2 contains a factory Test Mode to confirm relay outputs and perform a factory default reset. Testing fan operation involves pressing the MODE button until OFF is displayed, then pressing the FAN button to energize the internal fan relay. Adaptive Recovery is available in programmable mode and allows the thermostat to calculate the most energy-efficient time to reach the desired set temperature. Testing heat pump operation is similar to conventional systems, with the fan relay energized for both heating and cooling calls. Emergency Heat mode is indicated on the LCD when the thermostat is set to specific configurations in the Advanced Installer menu. If there is no LCD display, check for 24 volts across '24' and '24C' and ensure the factory jumper is in place. Temperature inaccuracies may be caused by air leaks, improper sensor placement, or external influences affecting temperature readings. The reversing valve in heat pump mode is energized with a cooling or heating call and will de-energize after 30 minutes without an opposite call. Locked on the LCD is not a fault and may indicate an outdoor sensor is preventing heating or cooling based on outdoor air temperature.
• Page 11: Confirm the resistance value (within 5%) to the temperature where the sensor is mounted. Disconnect power to the thermostat when wiring the sensor to the ‘T’ and ‘T’ terminals. The sensor is not polarity specific so either sensor lead may be connected to either terminal. This is not a fault. Commissioning mode is enabled and time delays are overridden. Change CD=1 to CD=0 in the Advanced Installer menu. Check wiring to outdoor sensor. Make sure that TT=OA in the Advanced Installer menu. Mount the sensor on a vertical exterior surface below an overhang. Choose a location protected from direct sunlight and exposure to excessive moisture. The thermostat is set to Fan ON. Set the thermostat to Auto Fan. Change the FP value in the Advanced Installer menu. Lock values have been set. Refer to LC settings in the Advance Installer menu. Make sure that the plastic tab on the internal fitted battery is removed so that the battery is operational. The T-32-P2 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. Locate the sensor in the same manner as a thermostat. Mount the sensor 18” away from any outside wall. The maximum wire length from the sensor to the thermostat is 300 feet.