Bryant T2-PAC User's Manual
Contents
1. 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 Auto Changeover Timer To prevent unnecessary cycling between heating and cooling modes this timer prevents a changeover to the opposite mode until a demand exists in the opposite mode for 20 minutes It is defeated when setpoints are changed so that the opposite mode is immediately available if desired Error Codes Two error messages indicate problems with the thermostat s operation If the room temperature sensor fails the temperature display will show two dashes If there is an internal memory failure the temperature display will show E4 The remedy for each of these is to replace the thermostat Table 1 shows the thermostat outputs for each available stage of heating or cooling It may be useful in checkout or troubleshooting 23 Table 1 Outputs Equip Tstat COOL COOL HEAT HEAT HEAT AEN Config Model STG1 STG2 STG1 STG2 STG3 2 SS AC T2 NAC Opt T2 PHP y d w gt gt A T2 NHP SS HP Op HP T2 PHP Y Es T Y D m RVS O T2 NHP w Opt10 C SS HP M Optt HP T2 PHP Y M RVS T2 NHP2. O B 77 Opt 10 H 2SPD AC T2 PHP Yi Opti A2 T2 NHP t Y ES 2SPD HP Opt1 H2 T2 PHP W vi Yt M W RVS O T2 NHP Y W Opt10 C 2SPD HP m Yi Opt1 H2 T2 PHP vi Yi Yi Y w RVS B T2 NHP Y O B W Opt 10 H T2 PHP Heat Only T2 NHP __ __ w __ c Optt H T2 PAC T2 NAC Cool Only T2 PAC Y Opt1 C T2 NAC 2 Cool Only T2 PHP Opt1 C T2 NHP Yi NN zs x ss 5 24 WIRING DIAGRAMS Thermostat Furnace Air Conditioner Heat Cool Fan 24VAC Heating 24VAC Cooling Common C wire not needed for batteries Remove jumper when using split power Indoor and Outdoor units utilize separate transformers A12246 Fig 5 Single Speed A C Thermostat Typical Installation 25 WIRING DIAGRAMS cont Thermostat Fan Coil Heat Pump Heat Cool Fan 24VAC Heating 24VAC Cooling C wire not needed for batteries Remove jumper when using split power Indoor and Outdoor units utilize separate transformers A12238 Fig 6 Single Speed HP Thermostat Typical Installation 26 WIRING DIAGRAMS cont Single Stage Single Stage Thermostat Furnace Air Conditioner Cool Fan 24VAC Hot Heating 24VAC Hot Cooling 2 lt 24VAC Common Indicates connection may not be required available A09246 Fig 7
3. Single stage Furnace with Air Conditioner and Split Power NOTE Rc Rh jumper is cut or removed on the thermostat 27 WIRING DIAGRAMS cont Thermostat Furnace Air Conditioner Heat Stage 2 NA Heat Stage 1 Cool Stage 1 Cool Stage 2 Fan 24VAC Hot Heating 24VAC Hot Cooling 24VAC Common Remove jumper when using split power Indoor and Outdoor units utilize separate transformers A12240 Fig 8 Variable Speed Step Modulating Multi Stage and Single Stage Furnace with 2 Stage Air Conditioner 28 WIRING DIAGRAMS cont Thermostat Furnace Heat Pump RVS Cooling Heat Stage 3 furnace Heat Cool Stage 1 Heat Cool Stage 2 Fan 24VAC Hot Cooling 24VAC Common c F Some heat pumps may designate W1 Remove jumper when using split power Indoor and Outdoor Units utilize separate transformers A12241 Fig 9 Variable Speed Multi Stage Stage Modulating and Single Stage Furnace with 2 Stage Heat Pump 29 WIRING DIAGRAMS cont Thermostat Fan Coil Air Conditioner Remove J2 Heat Stage 2 Jumper for Heat Stage 1 heat staging Cool Stage 1 Cool Stage 2 Fan 24VAC Hot Heating 24VAC Hot Cooling 24VAC Common Remove jumper when using split power Indoor and Outdoor units utilize separate transformers A12242 Fig 10 FV FK Fan Coil w 2 Stage Air Conditioner 30 WIRING DIAGRAMS cont Thermostat Fan Coil Heat Pump RVS Cooling Heat Stage 3 He
4. P nP Default is P This option is only available on programmable models allowing programming to be disabled when nP is selected The clock is displayed but the program schedule the HOLD and TEMPORARY HOLD functions are disabled Option 25 Number of Programmable Periods programmable models only Selections 2 4 Default is 4 Selecting 2 allows 2 programming periods P1 and P2 per day Selecting 4 allows periods P1 P2 P3 and P4 Not available with non programmable thermostats 16 Option 26 Minimum Cooling Setpoint Selections 52 F to 90 F Default is 52 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 NOTE All configuration settings program settings clock and day which have been manually entered will be lost When this option is selected the configuration number 99 will appear on the left and 10 will appear on the right To perform the reset first use the MODE key to make the 10 flash Then press and hold the DOWN key The 10 will start counting down toward zero If the DOWN key is kept pressed until the count reaches zero the reset will be performed If the DOWN key is released early t
5. alert to the potential for personal injury Understand the signal words DANGER WARNING and CAUTION These words are used with the safety alert symbol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies a hazard which could result in personal injury or death CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation INTRODUCTION Bryant s Legacy 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 Programming features include 7 day all days the same and 5 2 Mon Fri and Sat Sun with 2 or 4 periods per day This Installation Instruction covers installation configuration and start up of all four versions of the Legacy Series line of thermostats For operational details consult the Owner s Manual for the specific thermostat you are installing INSTALLATION CONSIDERATIONS Models There are four models
6. 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 Power Legacy Series models are dual powered They can operate from batteries or 24VAC power Operation from 24VAC is preferred if available Battery operation is used when there are not enough wires to support 24VAC operation or when armchair programming is desired For an AC system up to six wires are needed for 24VAC operation and one less wire for battery operation For a HP system up to seven wires are needed for 24VAC operation and and one less wire is sufficient for battery operation For heat only operation with batteries only two wires are required When battery operation is used the C terminal does not need to be connected Provision is also made for separate heating and cooling transformers via separable Rc and Rh terminals which are connected via factory installed jumper wire INSTALLATION Step 1 Thermostat Location Approximately 5 ft 1 Sm from floor Close to or in a frequently used room preferably on an inside partition ing wall On a section of wall without pipes or duct w
7. or C is selected under Option 1 Option 16 Maximum Cycles Per Hour Selections 2 4 or 6 Default is 4 The maximum cycle rate is limited by internal timers to the selected number of cycles per hour Selection of a higher number causes faster cycling resulting in more constant room temperature Option 17 Minimum Time Between Equipment Stages Selections 10 15 20 25 Default is 15 When there is an auxiliary stage of heat available this is the amount of time the heat pump must operate before the aux stage can turn on With heat pumps longer times can reduce the amount of auxiliary heat used Not available with AC thermostats 15 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 With ON selected the keypad will be locked and can be unlocked by simultaneously pressing the UP and DOWN keys for 5 seconds Once unlocked it will relock 2 minutes after the last keypad press A lock icon is displayed while it is locked Option 24 Programmable Non Programmable programmable model only Selections
8. 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 Smart Recovery OF means setpoints change immediately at a program schedule change Thirty 60 or 90 selects the number of minutes recovery starts before programmed recovery time Recovery takes place smoothly during the selected recovery time ending at the recovery time and temperature which is programmed If the setpoint is changed during smart recovery the smart recovery is cancelled and the new setpoint is effective immediately Not available with non programmable thermostats 14 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 Auto changeover is not available when H
9. N 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 Wiring For all wiring applications use 22 AWG or larger wire Continuous wire lengths over 100 ft 30 5 m should use 20 AWG or larger Wire lengths are not to exceed 250 ft 76 m per run O B Terminal On HP Thermostat Only This terminal is normally connected to the reversing valve of the heat pump It is called O when the valve is energized in cooling and B when it is energized in heating Option 10 of the Configuration Options makes the O B selection Timers There are several timers which influence the thermostat s operation If any of the timers listed below is preventing the equipment from turning on the display icons which show the equipment is operating will be flashing to indicate a turn on delay is present Five Minute Compressor Timeguard This timer prevents the compressor from starting unless it has been off for 5 minutes It can be defeated for one cycle by simultaneously pressing the FAN and UP keys 22 Minimum On Timer Once the equipment has been turned on it must remain on for 3 minutes
10. T2 PAC T2 NAC T2 PHP T2 NHP LEGACY SERIES THERMOSTATS Installation Instructions n J A07047 A07046 Legacy Series Legacy Series Programmable Thermostat Non Programmable Thermostat Po Designed and Assembled in the U S A NOTE Read the entire instruction manual before starting the installation US patents US20060165149 A1 USD582803 SI USD582802 SI TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS 2 INSTALLATION CONSIDERATIONS 4 INSTALLATION 222 22 22 tre rt et SER ma e 5 Step 1 Thermostat Location 5 Step 2 Install 5 Step 3 Set Thermostat Configuration 10 Step 4 Check Thermostat Operation 18 FEATURES AND ACCESSORIES 20 OPERATIONAL AND CONNECTION INFORMATION 22 WIRING DIAGRAMS 25 THERMOSTAT CONFIGURATION RECORD 32 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 A When you see this symbol on the equipment and in the instruction manual be
11. able models only Number of Programmable Periods Per Day programmable models only Minimum Cooling Setpoint Maximum Heating Setpoint Options with an asterisk can also be set changed by the homeowner 33 34 35 36 Copyright 2012 Bryant Corporation 7310 W Morris St Indianapolis IN 46231 IT2 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
12. at Cool Stage 1 5 Heat Cool Stage 2 Y Y2 Fan 24VAC Hot Heating 24VAC Hot Cooling 24VAC Common Remove jumper when using split power Indoor and Outdoor units utilize separate transformers A12243 Fig 11 FV FK Fan Coil w 2 Stage Heat Pump 31 THERMOSTAT CONFIGURATION RECORD Installer Model Number Date A Hardware Configuration Seal Hole In Wall Heating Setpoint Value Cooling Setpoint Value Fan Auto or On C Home Away Sleep Settings Heat Home Away Sleep D Schedule For Programmable Thermostats Period 1 Period 2 Time Heat Cool Time Heat Cool All Days Mode Off Heat Cool Auto Em Heat Period 3 Time Heat Cool Period 4 Time Heat Cool Week days Week end 32 E Configuration Options p p p p p p p p p p p p p p p p 000 _00000000000000 O p ion 01 ion 03 ion 04 ion 07 ion 10 ion 11 ion 12 ion 13 ion 15 ion 16 ion 17 ion 18 ion 21 ion 24 ion 25 ion 26 ion 27 Equipment Type Fahrenheit Centigrade Selection Fan G on with W W1 Selection Zoning Reversing Valve Minimum Deadband Between Heating and Cooling Setpoints Smart Recovery programmable models only Room Air Temperature Offset Adjustment Auto Changeover Availability Cycles Per Hour Time Between Equipment Stages Backlight Configuration Keypad Lockout Programmable Non Programmable programm
13. ate remote armchair programming For battery operation install two alkaline AA batteries The thermostat is designed to operate up to one year on a set of batteries A battery indicator on the display warns when battery replacement is needed See Homeowners Guide for details If batteries are installed and the thermostat is operated from 24VAC power battery operation will occur only when 24VAC power is not present The changeover between 24VAC power and battery power is automatic Display Lighting The display has two levels of lighting high level and low level High level lighting comes on for 10 seconds when the door is opened and or buttons are being pressed with 24VAC and with batteries Low level lighting is only available if the thermostat is operated from 24VAC It is not available with batteries The low level can be selected see Option 18 for continuous backlight 20 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 Mounting hole locations for the non programmable are spaced to fit a horizontal junction box 21 OPERATIONAL AND CONNECTION INFORMATIO
14. d the Y1 Y Y2 G and O signals are taken from the Rc power Rc 24 VAC from cooling equipment Rh 24 VAC from heating equipment W Heating C Common 24 VAC G Fan Y Y2 Cooling High or Single Stage reversing valve Y1 Cooling O Low Stage OOOOOO A09271 Fig 3 Terminal Designations A 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 9 Push any excess wire into wall and against mounting base Seal hole in wall to prevent air leaks Leaks can affect operation 10 Snap case back together Attach thermostat to backplate by inserting tab on bottom edge and hinging up until top snap secures See Fig 4 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 A HP thermostat configured to operate an AC see Option 1 below will display AC An AC the
15. he number will return to 10 and the reset will not occur 17 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 More specifically press and hold the FAN for about 15 seconds until the display reads In on the left and St on the right for the programmable model or InS in the smaller display for the non programmable model The MODE will be OFF The MODE key upper left can now be used to select heat cool or emergency heat if this is a HP thermostat Selecting one of the available modes will immediately command the equipment to turn on in that mode It will run for 3 minutes and then return the mode to off With HP thermostats having 2 stages of heating the test will run for 3 minutes on each stage If the thermostat is programmable the clock display counts down from 180 seconds while each stage operates Changing the mode to OFF will terminate any running test immediately During any test the display icons will be displayed the same as for normal operation of that stage as follows SELECTED MODE DISPLAY ICONS off off cool cool on heat heat on aux heat on Em Heat aux heat on To terminate the Instal
16. ing base from re mainder of thermostat 4 Route thermostat wires through large hole in mounting base Level mounting base against wall for aesthetic value only thermostat need not be level for proper operation and mark wall through four mounting holes To avoid unin tended bending of wall plate plastic all four screws and anchors must be used See Fig 1 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 con nector 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 If there are separate 24VAC transformers one in the indoor unit and one in the outdoor unit connect the common of each to the C terminal Remove factory installed jumper wire from Rc and Rh terminals Connect the R from the indoor unit to the Rh terminal Connect the R from the outdoor unit to the Rc terminal Then the W signal is taken from the Rh power an
17. inimum cooling setpoint Maximum heating setpoint Reset to factory defaults Those options marked with an asterisk are also adjustable by the homeowner See Owner s Manual for further information 11 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 To cause the opposite pair to flash to be adjustable press the MODE key Successive presses of the MODE key alternate between the configuration number and the configuration setting To exit the configuration mode press the FAN key If no key is pressed for 3 minutes the configuration mode will automatically exit returning the thermostat to normal operation Configuration Options Selection Option 01 Equipment type Selections with HP thermostat HP H2 2 C with AC thermostat AC H C HP controls 1 speed heat pump with 1 stage of aux heat A2 controls two stages of cooling and one stage of furnace heat H2 controls a 2 Speed HP with 1 stage of aux heat AC controls 1 speed air conditioner with 1 stage of heat H operates a heat only system furnace
18. ler Test mode press the DONE or FAN button If the thermostat is left in Installer Test mode it will revert back to normal operation after 15 minutes 18 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 19 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 Clock programmable models only Without batteries the clock will continue to operate for 8 hours while power is removed With batteries the clock operates until the end of the battery life Batteries Battery operation is available for installations where there is no common C wire available at the thermostat or where operation is to continue while the thermostat is removed from the wall usually to facilit
19. or fan coil only no outdoor unit C operates a cool only system outdoor AC unit with an indoor fan coil no strip heater support Note that this option allows a HP thermostat to be converted to control an AC system 12 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 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 Some auxiliary heaters require a separate G signal to operate the blower when W is applied Option 07 Zoning Selections OF non zoned system This is default ON zoned system ON disables thermostat s internal timers which are not needed with zoning system controls Must be set to OF for non zoned systems Option 10 Reversing valve This selection is only available on heat pump systems O terminal can be configured to be energized in either heating mode or in cooling mode depending on heat pump operation O is used to describe a heat pump system that energizes its reversing valve in cooling is used to describe a heat pump system that energizes its reversing valve in heating 13 H Reversing valve output O W2 B is energized
20. ork Thermostat 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 the sun a lamp fireplace or other temperature radiating objects which could cause a false reading Close to or in direct airflow from supply registers and return air re gisters In areas with poor air circulation such as behind a door or in an alcove Step 2 Install Thermostat MA WARNING ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death Before installing thermostat turn off all power to equipment There may be more than one power disconnect 1 Turn OFF all power to unit 2 If an existing thermostat is being replaced a Remove existing thermostat from wall 5 b Disconnect wires from existing thermostat one at a time Be careful not to allow wires to fall back into the wall As each wire is disconnected record wire color and terminal marking d Discard or recycle old thermostat amp 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 The base can be removed to simplify mounting Press the thumb release at the top of the thermostat and snap apart carefully to separate mount
21. rmostat cannot display HP NOTE If a common wire has not been connected two AA batteries must be used to power the thermostat Step 3 Set Thermostat Configuration Configuration options enable the installer to configure the thermostat for a particular installation Most are not presented to the homeowner and therefore must be properly set by the installer Only those marked with an asterisk below are available to the homeowner Following is a list of the options available an explanation of their function 10 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 1 T2 and T6 thermostat lines Configuration Options Summary Option 01 Option 03 Option 04 Option 07 Option 10 Option 11 Option 12 Option 13 Option 15 Option 16 Option 17 Option 18 Option21 Option24 Option 25 Option 26 Option 27 Option 99 Equipment type Fahrenheit Centigrade Fan G on with W output Zoning Reversing valve Minimum deadband between heating and cooling setpoints Smart Recovery programmable models only Room air temperature offset adjustment Auto Changeover availability Maximum cycles per hour Time between equipment stages Continuous backlighting Keypad lockout Programmable non programmable programmable models only Number of programmable periods per day M
Download Pdf Manuals
Related Search