Bryant PREFERRED T6-NAC Installation Instructions Manual
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Bryant PREFERRED T6-NAC Installation Instructions Manual

Preferred series ac/hp thermostat
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See also: Owner's Manual
T6−PAC, T6−PHP,
T6−NAC, T6−NHP
PREFERREDt SERIES
AC / HP THERMOSTAT
Programmable Control
NOTE: Read the entire instruction manual before starting the installation.
US patents: US7287709 B2, US20080147242 A1, USD582800 SI, US20060165149 A1, US6956463 B2.

Installation Instructions

A07045
Designed and Assembled in the U.S.A.
A07044
Non-Programmable Control

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  • Page 1: Installation Instructions

    T6−PAC, T6−PHP, T6−NAC, T6−NHP PREFERREDt SERIES AC / HP THERMOSTAT Installation Instructions A07045 Programmable Control NOTE: Read the entire instruction manual before starting the installation. US patents: US7287709 B2, US20080147242 A1, USD582800 SI, US20060165149 A1, US6956463 B2. Non-Programmable Control Designed and Assembled in the U.S.A.

  • Page 3: Table Of Contents

    SYSTEM START−UP AND CHECKOUT OPERATIONAL INFORMATION TROUBLESHOOTING WIRING DIAGRAMS THERMOSTAT CONFIGURATION RECORD 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 AC/HP Control.

  • Page 4: Introduction

    During power loss its internal memory saves settings for unlimited time, and the clock continues to run for at least 24 hours. An extension of Bryant’s proven line of thermostats; it provides separate setpoints for heating and cooling.

  • Page 5: Installation Considerations

    The W signal is taken from the Rh power and the G signal is taken from the Rc power. If thermostat has been installed in a two−transformer application that is later changed to a single−transformer installation, installer must install a field supplied jumper between Rc and Rh.
  • Page 6 There are programmable and non−programmable models for all applications. They can be configured for AC or HP installations, allowing it to be used in place of all Bryant thermostats. Programmable thermostats may be configured as non−programmable if user desires. Outdoor Temperature Sensor The outdoor air temperature sensor is not included with the AC/HP Control.
  • Page 7 A remote temperature sensor may be used with the programmable heat pump and programmable air conditioner thermostats where it is desirable to install the thermostat in a limited access location while measuring the temperature in the living space. The remote room sensor may be used as a stand alone or average with local sensor.

  • Page 8: Installation

    Wiring Wire length should be no more than 250 ft (76m). Use 22 AWG for normal wiring applications. Continuous wire lengths over 100 ft (30.5m) should use 20 AWG or larger. Carton contains the following components. See Fig. 2 for programmable models or Fig.
  • Page 9 Fig. 3 − T6−NAC / T6−NHP Carton Contents 1. Display Module 2. Stand−off for Equipment Control Module 3. Screws and pig tail 4. Equipment Control Module AC/HP Control Location AC/HP Control should be mounted: Approximately 5 ft (1.5m) from floor. Close to or in a frequently used room, preferably on an inside parti- tioning wall.
  • Page 10 AC/HP Control should NOT be mounted: Close to a window, on an outside wall, or next to a door leading to the outside. Exposed to direct light or heat from a lamp, sun, fireplace, or other temperature−radiating objects which could cause a false reading. Close to or in direct airflow from supply registers and return−air regis- ters.
  • Page 11 2. If an existing thermostat is being replaced a. Remove existing thermostat from wall. b. Disconnect wires from existing thermostat, 1 at a time. c. As each wire is disconnected, record wire color and terminal marking. d. Discard or recycle old thermostat.
  • Page 12 Two−Piece Installation The following steps should be followed for the installation of the two−piece configuration. NOTE: The 2−wire pigtail is not intended to support the weight of the User Interface. Do not hang the User Interface from the equipment Control Module screw terminals.
  • Page 13 A07226 Fig. 5 − Take Apart 2. Route wires through large hole in mounting base. Level mounting base against wall (for aesthetic value only—Display Module need not be lev- eled for proper operation) and mark wall through 4 mounting holes. To avoid unintended bending of wall plate plastic, use all 4 screws and an- chors.
  • Page 14 Fig. 6 − Backplate Mounting 3. Drill two 3/16−in. mounting holes in wall where marked. Thermostat may be mounted to a standard junction box, if desired. Hole pattern on ther- mostat mounting base matches junction box mounting holes. 4. Secure rear plastic mounting base to wall with 4 screws and anchors pro- vided.
  • Page 15 Control Module Wiring Guide Control Module Wiring Guide OAT / OAT / SRTN SRTN return return contact contact connect connect to user to user interface interface Fig. 7 − Control Module Wiring Guide HUM terminal is not used on this model. S Red is V+ S Black is Vg Relays...
  • Page 16 A07166 Fig. 8 − Secure Wires to Terminal Strip A07167 Fig. 9 − Connect Pigtail Wires to Display Module...
  • Page 17 NOTE: The 2−wire pigtail is not intended to support the weight of the User Interface. Do not hang the User Interface from the equipment Control Module screw terminals. S Red is V+ S Black is Vg 7. Push any excess wire into wall and against mounting base. Seal hole in wall to prevent air leaks.
  • Page 18 10. Find suitable indoor mounting location for Equipment Control Module, either near or on equipment. See Fig. 11. IMPORTANT NOTE: Equipment Control Module should not be mounted to duct work or below any other controls or equipment (i.e. humidistat, humidifier, etc.). Fig.
  • Page 19 Correct polarity must be observed when connecting the two wires from the Equipment Control Module to the thermostat mounting base. If wires are connected incorrect- ly, the Display Module will not operate. See Fig. 7, 8 and 9.
  • Page 20 Fig. 13 − Cover on Equipment Control Module 14. Turn on power to equipment. On power up, all display segments will light for 5 sec. For the next 5 sec a 2−digit code appears on large display which identifies AC/HP Control configuration. Refer to Option 33. a.
  • Page 21 To avoid unintended bending of wall plate plastic, use all 4 screws and anchors. 2. Drill four 3/16−in. mounting holes in wall where marked. Thermostat may be mounted to a standard junction box if desired. Hole pattern on Equipment Control Module matches junction box mounting holes.
  • Page 22 Seal hole in wall to prevent air leaks. Leaks can affect operation and cause incorrect temperature and/or humidity measurement. 7. Remove 2−wire pigtail from thermostat mounting base and attach to Equipment Control Module terminal block (terminals V+ and Vg). Attach 2−wire pigtail to the back of the Display Module via 2 pin, keyed connec-...
  • Page 23 H2 — 2−stage heat pump with fan coil f. A2 — 2−stage air conditioner with fan coil or furnace Set AC/HP Control Configuration Configuration options enable the installer to configure the thermostat for a particular installation. Most are not presented to the homeowner and therefore A07221...
  • Page 24 must be properly set by the installer. (Only those marked with an asterisk * below are available to the homeowner.) The homeowner configurations are described in the owner’s manual. A special procedure allows entry into the configuration mode. Description of each selection and how to use the configuration mode follows.
  • Page 25 Option 18* — Backlight Configuration Option 19 — Dry Contact (programmable models only) Option 20 — Outdoor Air Temperature Offset Adjustment Option 21* — Keypad Lockout Option 24* — Programmable/Non−Programmable (programmable models only) Option 25* — Number of Programmable Periods per Day (programmable models only) Option 26 —...
  • Page 26 WHILE IN CONFIGURATION MODE The option number is displayed in the heat setpoint location and the configuration setting is displayed in the cool setpoint location. On the T6−PAC/PHP (programmable) models, a box will surround the option number. The mode button is used to move the box between the two displayed values. The soft keys below the listed values may also be used to move the box between selected values.
  • Page 27 Defaults HP model defaults to HP. AC model defaults to AC. Option 02 — Clean Filter Timer Select hours of blower operation (heating, cooling, or fan) before CHECK FILTER icon is displayed. With OF selected, icon will never come on, disabling this feature.
  • Page 28 Fig. 16 − Remote Room Sensor − Parallel Wiring This selection determines which sensor the control will use for measuring room air temperature. Room air temperature can be sensed in one of three ways; the local sensor (L) located on the Display Module, the remote room air sensor (r), or the average of local and remote sensors (Lr).
  • Page 29 Option 07 — Zoning This selection should be set to On when the thermostat is to be used as part of a zoning system. It is assumed that the zoning equipment will take care of time guard and cycle timers. The minimum on time is still controlled by the thermostat.
  • Page 30 Default is 0. Option 15 — Enable Auto Mode This selection is not available if the thermostat is configured as Heat Only or Cool Only in Option 1. This allows the homeowner to select auto changeover mode in addition to heat and cool. This allows the thermostat to automatically change between heating mode and cooling mode when sufficient demand for heating or cooling exists.
  • Page 31 Default is On. Option 16 — Maximum Cycles Per Hour This selection limits the number of cycles per hour that the thermostat allows the system to operate. Selections are 2, 4, 6. 2 — The heating and cooling outputs will be energized no more than 2 times per hour.
  • Page 32 becomes brighter when a button is pressed. After 10 seconds of no button presses, the backlight will return to the dimmer level until another button press occurs. The range of brightness is 1 through 5 with 5 being full brightness. Default is 3.
  • Page 33 1 — The user has access to modify setpoints, time of day. 2 — The user has access to change the setpoints only. 3 — The entire keypad is locked. When a button is pressed, the backlight will turn on but none of the operating parameters will be changed. When the keypad lock selection is turned on, the padlock icon will be displayed.
  • Page 34 Option 22 — High Cool Latch Temperature (only available if outdoor sensor is present) An outdoor sensor is required for high cool latch feature. This selection is only available when Option 1 is set to H2, A2, or h2 and when Option 7 (zoning) is set to OF (off).
  • Page 35 Default is P (programmable models only). Option 25 — Number of Programmable Periods This selection allows the installer to configure the thermostat for two or four periods per day. Two periods is a common commercial application and four periods is more common for residential. This selection is not available if Option 24 has been set to nP to configure the thermostat for non−programmable...
  • Page 36 Option 27 — Maximum Heating Setpoint This selection allows the installer to configure the maximum heating setpoint. The range is based on the adjustable deadband value Option 11, such that the minimum of the range is 50_F/10_C and the maximum is 90_F/32_C minus the deadband.
  • Page 37 Option 32 — Furnace Heat Staging Control (available only when the HP thermostat is configured to operate AC equipment). 1 — Thermostat controls W1 output only and furnace controls the turn on and turn off of higher stages of heat.
  • Page 38 Default is 1. Option 33 — Single or Two−Piece Installation This configuration allows the thermostat to compensate for the amount of heat generated by the thermostat electronics to allow more accurate sensing of the temperature sensor. The amount of heat compensation will be different between single installation and two−piece installation.
  • Page 39 Fd. When the factory defaults have been restored, the thermostat will act as if power was cycled and return to normal operation. If the DOWN key is released early, the number will return to 10 and the reset will not...

  • Page 40: System Start−Up And Checkout

    To enable installer test mode, press and hold the fan button for 15 seconds. After 10 seconds, the thermostat will enter Configuration Mode. Continuing to hold the Fan button through 15 seconds will cause the thermostat to enter Installer Test Mode. Pressing the Mode button will change the system operating mode to test the heating and cooling equipment.
  • Page 41 TO TEST FAN Fan button switches FAN icon between AUTO and On. While On is displayed, G output will be energized, turning fan on. On some fan coils, fan continues to operate for 90 sec after G signal is removed. Final Settings Be sure to press DONE to exit installer setup mode.
  • Page 42 If fixed temperatures are desired, use SCHEDULE button to turn on arrow icon next to HOLD. This will maintain setpoints, not allowing them to change with programmed schedule. The FAN button may be used to select between AUTO (fan on only with equipment) and On (fan on continuously) fan modes.

  • Page 43: Operational Information

    Vacation (programmable models only) A vacation selection is available specifically for times where the home will not be occupied for an extended period. Vacation mode has an automatic hold, meaning that setpoints are not affected by the programmed schedule. Vacation mode is active for a specified period of time.
  • Page 44 10 minute timer has expired. If there is sufficient demand for a higher stage at the end of 10 minutes or at any time after the 10 minute timer has expired, the thermostat will energize the next higher stage.
  • Page 45 The same is true for HEAT ON. During second stage compressor operation a “2” will be displayed with the HEAT ON or COOL ON icon. This is displayed when the thermostat is configured as H2, A2, or h2. When the W is energized in a heat pump, the auxiliary heat on icon will be displayed.
  • Page 46 Emergency Heat Mode When AC/HP Control is configured as a heat pump and emergency heat is selected, all Y signals are locked out, and W becomes energized upon a call for heat. Programmable Fan (programmable models only) The fan output can be programmed based on period of the day. When programming for each day and period the fan can be set to On or AUTO.

  • Page 47: Troubleshooting

    To compensate for internal heat build−up from the electronics in the thermostat, the thermostat will add an offset to the actual temperature that it measures. If the thermostat power is cycled quickly, one can witness an immediate increase in the actual temperature displayed due to this added offset.
  • Page 48 A/C or HP display with a PAC equipment control module. When this happens, some functions appear in the setup while others do not. This can be very confusing to troubleshoot. Verify that both parts have the same model and serial number when troubleshooting the thermostat.
  • Page 49 Table 3 – Equipment Configuration Outputs For COOL, HEAT and Emergency Heat modes, the following chart shows the state for each output in each stage of operation EQUIP HARD- COOL CONFIG WARE STG 1 OPTION 01 CONFIG SS AC Y/Y2 SS AC Y/Y2 SS HP...
  • Page 50 Table 3 − Equipment Configuration Outputs (cont.) EQUIP HARD- COOL CONFIG WARE STG 1 OPTION 01 CONFIG 2SPD HP Y1/W2 RVS + B Heat Only Unit Cool Only Y1/W2 Unit Cool Only Y/Y2 Unit COOL HEAT HEAT HEAT STG 2 STG 1 STG 2 STG 3...

  • Page 51: Wiring Diagrams

    WIRING DIAGRAMS Display module Display module wall mount * Indicates connection may not be required/available. Fig. 17 − Display to Equipment Control Module Connection Equipment Control Module RVS/Heat Stage 2 O/B W2 Heat Stage 1 W/W1 Compressor Y/Y2 Not Used 24VAC Hot Heating 24VAC Hot Cooling Dry Contact 1...
  • Page 52 Remote Room Sensor OAT/RRS Com OAT/RRS * Indicates connection may not be required/available. ** Some heat pumps may designate W1. Fig. 18 − Fan Coil with Heat Pump (HP Thermostat) Fan Coil Outdoor Sensor * Remote Room Sensor * Heat Pump...
  • Page 53 WIRING DIAGRAMS(cont.) Thermostat RVS/Heat Stage 2 O/B W2 Heat Stage 1 W/W1 Compressor Y/Y2 Not Used 24VAC Hot Heating 24VAC Hot Cooling Dry Contact 1 Dry Contact 2 24VAC Common Outdoor Air Temp Remote Room Sensor OAT/RRS Com OAT/RRS * Indicates connection may not be required/available.
  • Page 54 WIRING DIAGRAMS(cont.) Thermostat RVS/Heat Stage 2 O/B W2 Heat Stage 1 W/W1 Compressor Not Used 24VAC Hot Heating 24VAC Hot Cooling Dry Contact 1 Dry Contact 2 24VAC Common Outdoor Air Temp Remote Room Sensor OAT/RRS Com OAT/RRS * Indicates connection may not be required/available.
  • Page 55 WIRING DIAGRAMS(cont.) Thermostat RVS/Heat Stage 2 O/B W2 Heat Stage 1 W/W1 Compressor Y/Y2 Not Used 24VAC Hot Heating 24VAC Hot Cooling Dry Contact 1 Dry Contact 2 24VAC Common Outdoor Air Temp Remote Room Sensor OAT/RRS Com OAT/RRS * Indicates connection may not be required/available.
  • Page 56 WIRING DIAGRAMS(cont.) Thermostat * Heat Stage 2 O/B W2 Heat Stage 1 W/W1 Compressor Y/Y2 Not Used 24VAC Hot Heating 24VAC Hot Cooling Dry Contact 1 Dry Contact 2 24VAC Common Outdoor Air Temp Remote Room Sensor OAT/RRS Com OAT/RRS * Indicates connection may not be required/available.
  • Page 57 Not Used 24VAC Hot Heating 24VAC Hot Cooling Dry Contact 1 Dry Contact 2 24VAC Common Outdoor Air Temp Remote Room Sensor OAT/RRS Com Fig. 23 − Thermostat with Dry Contact Control for Run Time O/B W2 W/W1 Y/Y2 OAT/RRS A09158...
  • Page 58 24VAC Common Outdoor Air Temp Remote Room Sensor OAT/RRS Com OAT/RRS * Indicates connection may not be required/available. Fig. 24 − 2−Stage Furnace with Air Conditioner (HP Thermostat Configured as AC) Furnace Air Conditioner W/W1 Y/Y2 Outdoor Sensor * Remote Room...
  • Page 59 WIRING DIAGRAMS(cont.) Thermostat RVS/Heat Stage 2 O/B W2 Heat Stage 1 W/W1 Compressor Low Compressor High Y/Y2 24VAC Hot Heating 24VAC Hot Cooling Dry Contact 1 Dry Contact 2 24VAC Common Outdoor Air Temp Remote Room Sensor OAT/RRS Com OAT/RRS * Indicates connection may not be required/available.

  • Page 60: Thermostat Configuration Record

    THERMOSTAT CONFIGURATION RECORD Installer _________________________ 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...
  • Page 61 E Configuration Options Option 01 Equipment Type _____ Option 02 Clean Filter Timer Adjustment _____ Option 03* Fahrenheit/Centigrade Selection _____ Option 04 Fan (G) on with W/W1 Selection _____ Option 05 Room Air Temperature Sensing _____ Option 06 Cooling Lockout Below 55_F Selection (only available if outdoor air sensor is present) _____ Option 07 Zoning...
  • Page 62 E Configuration Options (cont) Option 21* Keypad Lockout _____ Option 24* Programmable/Non-Programmable (programmable models only) _____ Option 25* Number of Programmable Periods Per Day (programmable models only) _____ Option 26 Minimum Cooling Setpoint _____ Option 27 Maximum Heating Setpoint _____ Option 28 UV Light Reminder _____...
  • Page 64 E2009 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 06/09 Catalog No: IIT6-PAC-03 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: IIT6-PAC-02...

This manual is also suitable for:

Preferred t6-nhpPreferred t6-pacPreferred t6-phpPreferred t6-pac seriesPreferred t6-php seriesPreferred t6-nac series ... Show all

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