Installation: Honeywell Home TB7100A1000 MultiPRO Multispeed and Multipurpose Thermostat Instruction Manual

Overview

The TB7100A1000 MultiPRO Multispeed and Multipurpose Thermostat is a versatile digital controller for 24 Vac heating and cooling equipment. It is intended for trained HVAC installers and supports conventional systems, heat pumps, fan-coil equipment, and PTAC applications.

The thermostat can operate as a seven-day programmable or non-programmable control. Depending on the equipment configuration, it manages heating, cooling, automatic or manual changeover, fan operation, remote sensing, occupancy setback, and multiple fan speeds.

Specifications

• Model: TB7100A1000 MultiPRO Multispeed and Multipurpose Thermostat.
• Power options: Two AA alkaline batteries, 24 Vac direct power, or 24 Vac with AA battery backup.
• Supported systems: One-stage conventional heating and cooling, heat-only, cool-only, heat pumps up to two heat stages and one cool stage, two-pipe fan coil, two-pipe fan coil with auxiliary heat, four-pipe fan coil, and PTAC systems up to two heat stages and one cool stage.
• System modes: Heat, Off, Cool, and Auto when automatic changeover is configured.
• Fan modes: Auto and On, with low, medium, and high speed options where supported.
• Temperature setting range: Heating from 40°F to 90°F (4.5°C to 32°C); cooling from 50°F to 99°F (10°C to 37°C).
• Operating ambient temperature: 0°F to 120°F (-18°C to 49°C).
• Shipping temperature: -30°F to 150°F (-34.4°C to 65.6°C).
• Operating humidity: 5% to 90% relative humidity, non-condensing.
• Dimensions: 3-3/4 inches high by 6 inches wide by 1-3/8 inches deep (95 by 152 by 35 mm).
• Terminal voltage: 20 to 30 Vac at 50 or 60 Hz.
• Running current: W and Y terminals, 0.02 to 1.0 A; G, G2, and G3 fan terminals, up to 0.60 A where applicable.
• Remote sensor compatibility: Compatible sensor types include 10K ohm and 20K ohm indoor sensors, depending on the selected sensor and setup configuration.
• Memory: The calendar can retain the current date and time for up to ten years after initial setup during normal use.

Detailed Description

The thermostat uses a wallplate with screw terminals and a removable front thermostat module. The terminal arrangement includes separate connections for heating power, cooling power, compressor control, transformer common, fan relays, auxiliary heat, changeover control, and sensor or setback inputs.

The RC terminal supplies cooling power, while R supplies heating power. In a single-transformer installation, the factory jumper between RC and R remains installed. In a two-transformer installation, remove that jumper and connect the common wire to the cooling transformer secondary.

The Y terminal controls compressor operation, W1 controls heating or auxiliary heat, and G controls the standard or low fan output. G2 and G3 provide medium and high fan outputs for compatible fan-coil applications. The O/B terminal operates a heat-pump or PTAC changeover valve and can be configured for operation during cooling or heating.

The S1 and S2 terminals can support an indoor remote sensor, remote setback input, or changeover sensing for compatible two-pipe fan-coil systems. Sensor wiring must use a separate cable from the thermostat control wiring.

Fan-coil and PTAC applications can use the VersaSpeed fan-ramping algorithm. When enabled, the thermostat selects an appropriate fan speed during heating or cooling instead of requiring a single constant speed. The available fan behavior depends on the selected system type and installer configuration.

Safety

• Installation must be performed by a trained and experienced service technician.
• Disconnect the power supply before installing or servicing the thermostat to prevent electric shock or equipment damage.
• Confirm that the electrical ratings and system type match the installed HVAC equipment before connecting wires.
• Follow applicable electrical codes, ordinances, and regulations.
• Use 18-gauge thermostat wire. Shielded cable is not required for the thermostat wiring.
• Do not install the thermostat near drafts, dead-air spaces, doors, corners, supply ducts, appliances, direct sunlight, concealed pipes, chimneys, or unconditioned exterior walls.
• If replacing a control containing mercury in a sealed tube, do not discard the old control with ordinary waste. Follow local requirements for mercury-containing equipment disposal.
• The thermostat contains a lithium battery that may contain perchlorate material. Special handling requirements may apply.
• Do not rapidly cycle a compressor during installer testing. The normal compressor minimum-off protection is bypassed during that test.

Setup and Installation

Choose the Location

Mount the thermostat about 5 feet (1.5 meters) above the floor in an area with average temperature and good air circulation. Avoid locations influenced by drafts, direct radiant heat, supply-air discharge, hidden piping, chimneys, or unheated walls.

Install the Wallplate

1. Separate the thermostat module from the wallplate.
2. Pull the control wires through the wallplate opening.
3. Hold the wallplate horizontally with the arrow pointing upward.
4. Mark the two mounting holes. Leveling is for appearance and does not affect operation.
5. For drywall, drill two 3/16-inch holes. For firmer materials such as plaster, drill two 7/32-inch holes.
6. Insert the supplied wall anchors until they are flush with the wall.
7. Pull the wires through the opening again, position the wallplate, and secure it with the mounting screws.

Connect the Wiring

1. Identify the terminal group that matches the selected conventional, heat-pump, fan-coil, or PTAC application.
2. Loosen only the screw terminals required for the installation.
3. Insert each wire into the correct terminal and tighten the screw securely.
4. Keep excess wire inside the shaded portion of the wall opening so it does not interfere with the thermostat module.
5. Seal the wall opening with nonflammable insulation to reduce the effect of drafts on temperature readings.

Power the Thermostat

The TB7100A1000 MultiPRO Multispeed and Multipurpose Thermostat supports three power arrangements:

• Battery only: Install two AA alkaline batteries.
• 24 Vac only: Connect the required transformer wiring, including common where applicable.
• 24 Vac with backup: Connect the 24 Vac supply and install two AA alkaline batteries for backup operation.

For a single-transformer system, connect transformer common to C and leave the RC-to-R jumper in place. For a two-transformer system, connect common from the cooling transformer to C and remove the RC-to-R jumper.

When installing batteries, place two AA alkaline cells in the rear battery holder according to the polarity markings. Remove the tab labeled “Remove” from the back of the thermostat; the clock cannot be configured until this tab is removed.

Attach the Thermostat

1. Align the terminal screw blocks on the wallplate with the matching pins on the rear of the thermostat.
2. Push the thermostat straight onto the wallplate.
3. Continue pressing until the module snaps securely into place.

Set the Calendar and Clock

When first powered, the thermostat opens the calendar and time setup sequence. Use the up and down controls to adjust the month, day, year, and time. Use the navigation controls to move between fields, then select Done to complete the sequence.

If the thermostat is already operating, the date can be adjusted through the installer setup menu. The clock can use either a 12-hour or 24-hour display, and daylight-saving behavior can be enabled or disabled through installer configuration.

Configure Installer Setup

1. Press and release the System button.
2. Press the System and Done buttons together.
3. Hold both buttons for approximately five seconds until the setup screen changes.
4. Release the buttons and configure only the settings that match the installed equipment.

Important setup choices include programmable or non-programmable operation, system type, heat-fan control, changeover valve action, cycles per hour, backlight behavior, automatic changeover, temperature units, remote sensor or setback input, fan ramping, fan mode, compressor minimum-off time, temperature limits, keypad lockout, recovery behavior, temperature display offset, and display format.

System Types

• Conventional: Supports standard heating and cooling configurations, including heat-only, heat with fan, and cool-only systems.
• Heat pump: Supports one or two heating stages and one cooling stage, with optional auxiliary or emergency heat.
• Four-pipe fan coil: Uses separate heating and cooling outputs with multiple fan speeds.
• Two-pipe fan coil: Uses a shared heating and cooling water circuit and manual changeover. A changeover sensor can lock operation to the detected mode.
• Two-pipe fan coil with auxiliary heat: Adds auxiliary heating when the system is configured for heating operation.
• PTAC: Supports one or two heating stages, one cooling stage, and low/high fan outputs.

Fan Operation

For conventional and heat-pump systems, the thermostat uses a single fan output with Auto and On choices. In Auto, the fan operates with a heating or cooling call; in On, it runs continuously.

For fan-coil and PTAC systems, fan ramping can provide Auto, low, medium, and high behavior where supported. The fan-ramping algorithm automatically selects a suitable speed for the control demand. A constant fan speed can be configured to return automatically to Auto after two or four hours.

Programmable and Setback Functions

Programmable operation supports a seven-day schedule with occupied and unoccupied periods. The default energy-saving schedule uses occupied heating at 70°F, occupied cooling at 75°F, unoccupied heating at 55°F, and unoccupied cooling at 85°F. Occupied periods use continuous fan operation by default, while unoccupied periods use Auto fan operation.

When a programmable schedule and fan are enabled, pre-occupancy purge can run the fan one, two, or three hours before the occupied period to circulate air.

Remote setback is intended for occupancy sensors, manual time-clock inputs, or DDC night-setback controls. The installer can configure unoccupied heating from 50°F to 65°F and unoccupied cooling from 75°F to 90°F. A two-minute setback delay is available, and non-programmable operation can optionally provide a temporary override.

Installer System Tests

Use the installer test menu to check equipment operation after wiring and setup are complete. Available tests depend on the configured system type and can include cooling stage one, fan stages one through three, heating stages one and two, and emergency heat. Press Done to exit the installer test.

Operation

System Settings

• Heat: Controls the heating equipment.
• Off: Turns off heating and cooling. The fan also stops unless another control condition applies.
• Cool: Controls the cooling equipment.
• Auto: Changes between heating and cooling automatically when the system supports automatic changeover.

Fan Settings

• Auto: Runs the fan only during a heating or cooling demand, subject to the equipment sequence.
• On: Runs the fan continuously.
• Low, Medium, High: Available on compatible fan-coil and PTAC configurations.

Compressor Protection

The minimum compressor-off timer can be set from zero to five minutes and is set to five minutes by default. During this delay, the display shows “Wait.” After the timer expires, the appropriate heating or cooling indication becomes active and the equipment can start.

The timer can be bypassed temporarily through the installer system test or disabled by setting the minimum compressor-off time to zero. Avoid disabling this protection unless the equipment application specifically requires it.

Keypad Lockout

The installer can limit user access through several lockout levels. Depending on the selected level, the thermostat can restrict schedule changes, system selection, fan selection, temperature adjustment, or all interface functions.

Troubleshooting

Display Is Blank

• Check for 24 Vac between C and RC when the thermostat is system powered.
• Confirm that both AA batteries are installed with the correct polarity and have adequate charge.
• Verify that the thermostat is fully seated on the wallplate.

Temperature Limits or Controls Cannot Be Changed

• Check whether the selected heating or cooling limit has been reached.
• Review the heating and cooling range-stop settings.
• Check the keypad lockout configuration and remove the restriction if authorized.

Heating or Cooling Does Not Start

• Allow up to five minutes if “Wait” is displayed because the compressor minimum-off timer is active.
• Confirm that the System setting is Heat or Cool as required.
• Verify that the installer system type matches the actual HVAC equipment.
• Check wiring at the thermostat and equipment for loose, broken, or shorted conductors.
• Use the installer system test to determine whether the thermostat can operate the required output.

Heating or Cooling Is Called but Equipment Does Not Run

• Check for 24 Vac at the equipment transformer secondary between power and common.
• For heating, check for 24 Vac between W and transformer common during a heat call.
• For cooling, check for 24 Vac between Y and transformer common during a cooling call.
• If the thermostat output is present, investigate the HVAC equipment, relay, contactor, or safety circuit.

Heat Pump Operates in the Wrong Mode

If the heat pump produces cool air during heating or warm air during cooling, verify the O/B changeover setting. The reversing-valve configuration must match whether the installed equipment energizes the valve during cooling or heating.

Heating and Cooling Operate Together

• Confirm that a non-heat-pump system has not been configured as a heat pump.
• Inspect the heating and cooling wires for a short between control circuits.
• Verify that the system type and transformer arrangement are configured correctly.

Fan Does Not Operate During Heating

On an electric furnace, check the heat-fan control setting. If the system should have the thermostat control the fan, select the thermostat-controlled electric heat option rather than system-controlled or fossil-fuel fan operation.

Fan Does Not Stop or Uses the Wrong Speed

• Check whether the fan is set to On instead of Auto.
• For fan-coil and PTAC systems, review fan-ramping and fan-mode settings.
• Inspect G, G2, and G3 wiring and confirm that the selected system type supports the connected fan outputs.

Remote Sensor or Setback Does Not Work

• Confirm that the remote input type matches the connected sensor or setback device.
• Use a separate cable for sensor wiring rather than sharing the thermostat control cable.
• Allow an indoor sensor to absorb room air for at least five minutes before judging its reading.
• For two-pipe fan-coil operation, verify that the changeover sensor configuration matches the installed sensor and piping arrangement.

Pros & Cons

• Pros: Broad compatibility with conventional, heat-pump, fan-coil, and PTAC equipment.
• Pros: Supports programmable or non-programmable operation.
• Pros: Provides multiple fan speeds and automatic fan ramping for compatible applications.
• Pros: Offers remote temperature sensing, occupancy setback, changeover sensing, keypad lockout, and adjustable control parameters.
• Cons: Correct installation requires careful system-type selection and detailed installer configuration.
• Cons: Fan-speed features vary by equipment type, so not every installation can use low, medium, and high control.
• Cons: Wiring errors, incorrect transformer jumper placement, or an incorrect O/B setting can cause improper equipment operation.