T2--PAC, T2--NAC T2--PHP, T2--NHP LEGACYt SERIES THERMOSTATS Installation Instructions A07047 Legacy Series Programmable Thermostat A07046 Legacy Series Non-- Programmable Thermostat Designed and Assembled in the U.S.A. NOTE: Read the entire instruction manual before starting the installation.
TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 INSTALLATION CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 4 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Step 1 — Thermostat Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Step 2 — Install Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS Read and follow manufacturer instructions carefully. Follow all local electrical codes during installation. All wiring must conform to local and national electrical codes. Improper wiring or installation may damage thermostat. Recognize safety information. This is the safety-- alert symbol . When you see this symbol on the equipment and in the instruction manual, be alert to the potential for personal injury. Understand the signal words DANGER, WARNING, and CAUTION.
INTRODUCTION Bryant’s Legacyt Series programmable thermostats are wall-- mounted, low-- voltage thermostats which maintain room temperature by controlling the operation of a heating and/or air conditioning system. Both heat pump and air conditioner models are available, each in programmable and non-- programmable versions. A variety of features are provided including battery operation, separate heating and cooling setpoints, auto changeover, keypad lockout, backlighting, and built-- in installer test.
INSTALLATION CONSIDERATIONS Models There are four models in the Legacy Series: programmable and non--programmable, AC and HP. Models T2--PAC and T2--NAC are designed for AC systems, controlling one stage of cooling and one stage of heating. They will not operate a heat pump. Models T2--PHP and T2--NHP are designed for HP systems, controlling two stages of cooling and three stages of heating. They can be converted to AC operation. Select the appropriate model for the intended application.
INSTALLATION Step 1 — Thermostat Location Approximately 5 ft (1.5m) from floor. Close to or in a frequently used room, preferably on an inside partitioning wall. S On a section of wall without pipes or duct work. Thermostat should NOT be mounted S Close to a window, on an outside wall, or next to a door leading to the outside. S Exposed to direct light or heat from the sun, a lamp, fireplace, or other temperature-- radiating objects which could cause a false reading.
b. Disconnect wires from existing thermostat, one at a time. Be careful not to allow wires to fall back into the wall. c. As each wire is disconnected, record wire color and terminal marking. d. Discard or recycle old thermostat. ! CAUTION ENVIRONMENTAL HAZARD Failure to follow this caution may result in environmental damage. Mercury is a hazardous waste. Federal regulations require that Mercury be disposed of properly. 3. Open thermostat (mounting base) to expose mounting holes.
A07153 Fig. 1 - Backplate Mounting 5. Drill four 3/16-- in. mounting holes in wall where marked. 6. Secure mounting base to wall with four screws and anchors provided. To avoid unintended bending of wall plate plastic, all four screws and anchors must be used. Make sure all wires extend through hole in mounting base.
7. Adjust length and routing of each wire to reach proper terminal and connector block on mounting base with 1/4-- in. (6 mm) of extra wire. Strip only 1/4 in. of insulation from each wire to prevent adjacent wires from shorting together when connected. See Fig. 2. A07155 Fig. 2 - Secure Wires to Terminal Strip 8. Match and connect equipment wires to proper terminals of the connector blocks (see Fig. 3).
Rc - 24 VAC, from cooling equipment Rh - 24 VAC, from heating equipment W - Heating C - Common 24 VAC O/B - reversing valve G - Fan Y/Y2 - Cooling High or Single Stage Y1 - Cooling Low Stage A09271 Fig. 3 - Terminal Designations ! CAUTION ELECTRICAL OPERATION HAZARD Failure to follow this caution may result in equipment damage or improper operation. Improper wiring or installation may damage the thermostat. Check to make sure wiring is correct before proceeding with installation or turning on unit.
A07158 Fig. 4 - Attach Thermostat to Backplate 11. Close thermostat assembly making sure pins on back of circuit board align with sockets in connector. 12. Turn ON power to unit. When power is applied, all display icons are lit for 2 seconds to test the display. Following this, the equipment type for which the thermostat is configured is displayed for an additional 2 seconds. It will be one of HP, H2, AC, A2, H or C (see explanation under Step 3, Option 01 below).
and their factory default settings. Not all numbers are used in the Legacy Series because not all options are available in this series - and numbering is consistent across the T1, T2, and T6 thermostat lines.
To Enter the Configuration Mode: Press and hold the FAN key for about 10 seconds until the display changes so that only two pairs of digits are showing. The left (programmable version) or the large upper (non-- programmable version) display shows the configuration number and the right (programmable version) or small lower (non-- programmable version) shows the configuration setting. Configuration number will be flashing which means it can be adjusted using the UP and DOWN keys.
Option 03 - Fahrenheit/Centigrade Selections: F = Fahrenheit — Default is Fahrenheit. C = Centigrade. Selects temperature measurement units. Option 04 - Fan (G) ON with W output Selections: OF = G not energized with W — This is default. ON = G energized with W. This selection determines whether the fan (G) is to be ON or OFF when the W (furnace or strip heat) is ON. Furnaces and fan coils which manage their own blowers do not require a separate G signal.
H — Reversing valve output (O/W2/B) is energized when HEAT mode is selected. C — Reversing valve output (O/W2/B) is energized when COOL mode is selected. Default is C. Option 11 - Minimum Deadband Between Heating And Cooling Selections: 01 through 06 — Default is 02. Sets the minimum allowable number of degrees between heating and cooling setpoints. One setpoint will “push” the other to maintain this difference. Option 12 - Smart Recovery (programmable model only) Selections: OF, 30, 60, 90 — Default is 90.
Option 13 - Room Air Temperature Offset Selections: - 5 to 5_ F — Default is 0. This option selects the number of degrees F to be added to the displayed temperature to calibrate or deliberately miscalibrate the measured room temperature. Option 15 - Auto Changeover Availability Selections: ON — This is default. OF ON allows automatic changeover between heating and cooling as demand requires. OF maintains either heating or cooling mode only.
Option 18 - Backlight Configuration Selections: ON, OF — Default is OF. When ON is selected and the thermostat is not battery operated a low level continuous display backlight is always on. With OF selected, the backlight is only on for a short time after the door is opened or a key is pressed. Continuous backlight is not available with battery operation. Option 21 - Keypad Lockout Selections: ON, OF — Default is OF. With OF selected, the keypad cannot be locked.
Option 26 - Minimum Cooling Setpoint Selections: 52_F to 90_F — Default is 52_F. Sets the lowest cooling setpoint available to the user. Option 27 - Maximum Heating Setpoint Selections: 50_F to 88_F — Default is 88_F. Sets the highest heating setpoint available to the user. Option 99 - Reset to Factory Defaults Selection: See below — There is no default. Use this capability to reset the thermostat to “out of the box” conditions.
Step 4 — Check Thermostat Operation The Legacy Series thermostats have a built-- in installer test capability. Use it to check thermostat and equipment operation without delays or setpoint adjustments to force heating or cooling. To enter the Installer Test mode, use the same process as is used to enter Installer Configuration, only hold the FAN key longer.
Checklist 1. Run equipment through several heating and cooling cycles to ensure proper operation. To operate the thermostat in its normal operating mode, consult the Owner’s Manual. 2. If the equipment is to be left in operation, the setpoints, operating mode, and possibly program schedule must be properly selected. 3. Put away tools and instruments and clean up debris. 4. Review and leave Owner’s Guide with owner.
FEATURES AND ACCESSORIES Home, Away, Sleep (programmable models only) This feature provides three button selections which select from three predetermined pairs of heat and cool setpoints. In programmed versions, one of these three choices can be selected for any programmed period. To change these settings, a temperature is first selected and then the key pressed and held, similar to setting stations on a push-- button radio. See Owner’s Manual for details.
Door Switch When the door is opened, the display changes from its normal operation view. The large temperature display disappears so it will be available for other user functions. If the door is left open for 3 minutes, the display reverts to normal operation. Mounting Options For those installations requiring it, mounting hole locations for the programmable model are spaced to fit either a horizontal or vertical junction box.
OPERATIONAL AND CONNECTION INFORMATION Rc/Rh Connections For installations having a separate 24VAC transformer for heating and cooling, the R connection can be separated into two connections, one for each transformer. This allows isolation between the two transformers to be preserved. To separate Rc from Rh, remove the factory supplied jumper between the Rc and Rh terminals. The Rh terminal powers the W output. The Rc terminal powers the Y1, Y/Y2, G and O outputs.
Minimum On Timer Once the equipment has been turned on, it must remain on for 3 minutes. A change in mode or setpoint will cancel this timer. Cycle Timer Based on the selection of 2, 4, or 6 cycles per hour, this timer is set to 30, 15, or 10 minutes. This much time must elapse from the start of one cycle before another cycle can start. It serves to impose the cycles per hour limits. It can be defeated for one cycle by simultaneously pressing the FAN and UP keys.
Table 1 – Outputs Equip Config Tstat Model COOL STG 1 SS AC Opt 1 = AC T2 --- PAC T2 --- NAC T2 --- PHP T2 --- NHP Y SS HP Opt 1 = HP RVS = O Opt 10 = C T2 --- PHP T2 --- NHP Y, O/B SS HP Opt 1 = HP RVS = B Opt 10 = H T2 --- PHP T2 --- NHP 2SPD AC Opt 1 = A2 2SPD HP Opt 1 = H2 RVS = O Opt 10 = C COOL STG 2 HEAT STG 1 HEAT STG 2 W --- --- --- --- Y Y, W --- --- W Y --- --- Y, O/B Y, W, O/B --- --- W T2 --- PHP T2 --- NHP Y1 Y1, Y W --- --- --- --- --- --- T2 --- PHP T2 ---
WIRING DIAGRAMS W W Y1 ** Y/Y2 Y G G Rh R Y R Rc * COM C C * C wire not needed for batteries ** Remove jumper when using split power (Indoor and Outdoor units utilize separate transformers). A12246 Fig.
WIRING DIAGRAMS (cont.) Y1 Y/Y2 ** * * C wire not needed for batteries ** Remove jumper when using split power (Indoor and Outdoor units utilize separate transformers). A12238 Fig.
WIRING DIAGRAMS (cont.) Single-Stage Furnace Thermostat Single-Stage Air Conditioner O/B Heat W W Y1 Cool Y/Y2 Y Fan G G 24VAC Hot Heating Rh R 24VAC Hot Cooling Rc 24VAC Common C Y R COM * COM * Indicates connection may not be required/available. A09246 Fig. 7 - Single-- stage Furnace with Air Conditioner and Split Power NOTE: Rc/Rh jumper is cut or removed on the thermostat.
WIRING DIAGRAMS (cont.) Furnace Thermostat Heat Stage 2 (NA) Heat Stage 1 O/B W2 W W/W1 Air Conditioner Cool Stage 1 Y1 Y1 Y1 Cool Stage 2 Y/Y2 Y/Y2 Y/Y2 G G Rh R Fan 24VAC Hot Heating * 24VAC Hot Cooling Rc 24VAC Common C R DHUM COM C * Remove jumper when using split power (Indoor and Outdoor units utilize separate transformers). A12240 Fig.
WIRING DIAGRAMS (cont.) Thermostat Furnace Heat Pump O O/B W2 Heat Stage 3 (furnace) W W/W1 Heat/Cool Stage 1 Y1 Y1 Y1 Heat/Cool Stage 2 Y/Y2 Y/Y2 Y/Y2 G G Rh R RVS Cooling Fan 24VAC Hot Heating ** 24VAC Hot Cooling Rc 24VAC Common C W2* R DHUM COM C * Some heat pumps may designate W1. **Remove jumper when using split power (Indoor and Outdoor Units utilize separate transformers). A12241 Fig.
WIRING DIAGRAMS (cont.) Fan Coil Thermostat O Air Conditioner Remove J2 Jumper for heat staging O/B W2 Heat Stage 1 W W1 Cool Stage 1 Y1 Y1 Y1 Cool Stage 2 Y/Y2 Y/Y2 Y2 Fan G G Rh R R C C Heat Stage 2 24VAC Hot Heating * 24VAC Hot Cooling Rc 24VAC Common C *Remove jumper when using split power (Indoor and Outdoor units utilize separate transformers). A12242 Fig.
WIRING DIAGRAMS (cont.) Thermostat Fan Coil RVS Cooling Heat Pump O O O/B W1 W1 W2 Heat Stage 3 W Heat/Cool Stage 1 Y1 Y1 Y1 Heat/Cool Stage 2 Y/Y2 Y/Y2 Y/Y2 Fan G G 24VAC Hot Heating * Rh R R 24VAC Hot Cooling Rc 24VAC Common C C C *Remove jumper when using split power (Indoor and Outdoor units utilize separate transformers). A12243 Fig.
THERMOSTAT CONFIGURATION RECORD Installer _________________________ Model Number _____________________________ Date _______________________ A. Hardware Configuration __________ Seal Hole In Wall B. Mode Settings __________ Mode (Off, Heat, Cool, Auto, Em Heat) __________ Heating Setpoint Value __________ Cooling Setpoint Value __________ Fan (Auto or On) C. Home, Away, Sleep Settings Home Away Sleep Heat Cool ____ ____ ____ ____ ____ ____ D.
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Copyright 2012 Bryant Corporation 7310 W Morris St. Indianapolis, IN 46231 IIT2---PAC ---05 Replaces: IIT2--- PAC--- 04 Edition Date: 05/12 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
