Bryant OM TSTAT-1 Thermostat User Manual
Contents
1. ain active indefinitely and the desired temperature will not change according to the program time or the derived temperature values The desired temperature can be changed using the Up and Down buttons C Fan Button Operation The Fan button selects fan operation When the fan is set to ON the fan will run continuously When the fan is set to AUTO the fan will run during heating and cooling operation only If the fan is set to ON but the Allow Continuous Fan During Unoccupied Hours configuration is set to OF the fan will not run during unoccupied hours when heating or cooling is not active A small triangle will be displayed next to the Fan On icon to show the user that the fan is not running because of the unoccupied time period D Mode Button Operation The Mode button selects the operating mode of the thermo stat If OFF is selected the thermostat will not enter eat ing or Cooling mode If HEAT is selected the thermostat will only enter Heating mode if the room temperature is below the heating set point If COOL is selected the thermostat will only enter Cooling mode if the room temperature is above the cooling set point If AUTO is selected the thermo stat will enter Heating or Cooling mode based on the room temperature and the heating and cooling set points Units also have an EHEAT selection which is configured by the installer If EHEAT is selected the unit will use the second stage of heating to provide heating i2. ave energy by gradually adjusting temperatures to meet scheduled set points The thermostat has 2 schedule modes normal occu pied mode and setback mode a time when the space is unoc cupied The Smart Recovery function begins 1 to 1 5 hours before the scheduled occupied mode and gradually adjusts room temperature so the temperature is at the occupied mode set point when the occupied time period begins This is more efficient than making the system run at full capacity until the desired temperature is met NOTE Smart Recovery does not apply to cooling operation Ill SET CURRENT DAY The Change Day button will change the day shown on the thermostat display to the next day If a schedule has been entered the thermostat will follow the schedule of the new selected day IV SET CURRENT TIME The Set Time Temp button allows the user to change the time displayed on the thermostat Press the Set Time Temp button The TIME annunciator will flash Press the Up Down buttons until the correct time is shown Hold down the buttons to quickly move through the time display The AM and annundiators will automatically change To ensure the schedules are properly followed make sure that AM or PM is correct for the time chosen When the correct time is shown press the End button to exit the Set Time mode V RESET FILTER The Reset Filter function is used to clear the Clean Filter icon on the display screen The Reset Filter fun
3. ction is initi ated by pressing the Hold and Occupied buttons simulta neously The Clean Filter icon reminds the user when it is time to change or clean the filter of the unit VI PROGRAMMING THERMOSTAT SCHEDULES Before programming the thermostat plan the thermostat daily schedule The schedule is divided into 7 days Monday through Sunday Each day has 4 time periods OC1 UN1 OC2 UN2 Each time period has a start time heating set point and cooling set point Fill in Table 1 on page 4 as an aid to programming the daily schedules When choosing the times for OC1 UN1 OC2 and UN2 the following rules must be followed maximum number of hours allowed from OC1 UN1 or from OC2 to UN2 is 12 hours For example if has a value of 6 00 AM and UN1 had a value of 5 00 PM this would be acceptable If however OC1 has a value of 6 00 AM and UN 1 has a value of 7 00 PM this would not be acceptable because the difference is greater than 12 hours The value of UN2 must be greater than or equal to the value of OC2 while the value of OC2 must be greater than or equal to the value of UN1 and the value of UN1 must be greater than or equal to OC1 For example acceptable values would be UN1 2 UN2 6 00 AM 5 00 PM 5 00 PM 10 00 PM In the example above the thermostat will be occupied from 6 00 AM to 10 00 PM However if the following values were entered the thermostat would not be occupied as on
4. different seasons or prolonged changes in temperature Vil OVERRIDING THE SCHEDULE The schedule can be overridden in three ways the Hold but ton can be pressed to lock in the current temperature set ting the Up or Down buttons can be pressed to change the desired temperature or the Occupied button can be pressed to change the unoccupied set points to 1 The HOLD annunciator will turn on and the desired temperature will not change according to the program time or desired temper ature values The HOLD will last indefinitely until the HOLD button is pressed again The user can still change the desired temperature by using the Up and Down buttons When using the Up or Down buttons the thermostat will use the new set point until the next scheduled time period At the next scheduled time period the thermostat will revert back to the programmed temperature values The Occupied override button can be used to force the ther mostat into Occupied mode Vill DISPLAY OUTDOOR AIR LEAVING AIR TEMPERATURE When the Up and Down buttons are pressed at the same time the display will show the temperature of the sensor wired to the thermostat The temperature is displayed for 4 seconds with the letters od or LA outdoor temperature or leaving air temperature respectively The display then returns to normal If a sensor is not connected the thermo stat has been configured for use with a remote room sensor or the reading
5. e may expect UN1 OC2 UN2 6 00 AM 7 00 PM 6 00 PM 12 00 AM In the new example the thermostat will display UN2 from 12 00 AM to 6 00 AM then from 6 00 to 6 00 PM then OC2 from 6 00 PM to 7 00 PM then UN1 from 7 00 PM to 12 00 AM The thermostat in this example would be occupied from 6 00 AM to 7 00 PM because OC2 has a value less than the value of UN1 A Programming Mode To program the daily schedules perform the following procedure 1 Enter Programming mode by pressing the Program button The PROGRAMMING will appear on the thermostat display The current day of the schedule will be displayed and the current pro gramming time period of that day will be displayed TheTIME annunciator will flash NOTE If a programming button is not pushed for 2 minutes the thermostat will exit Programming mode and any changes made will be saved 2 Press the Up and Down buttons to set the start time for the schedule day and period shown 3 Press the Set Time Temp button once the correct time is shown The TIME annundciator will stop flash ing andthe HEAT annunciator will flash 4 The heating and cooling set points can now be pro grammed The HEAT and COOL annundators will flash for the heating and cooling set points respec tively The Set Time Temp button is used to toggle between the time heating and cooling set points Use the Up and Down buttons to raise and lower the temperature set point
6. f necessary The annun ciator for each selection will be displayed on the thermostat when selected E Auto Changeover When the thermostat mode is set to AUTO the thermostat will provide automatic changeover from Heating to Cooling mode and Cooling to Heating mode when required The ther mostat will automatically switch to maintain the desired temperature setting The thermostat does not need to be manually changed from heating to cooling or cooling to heat ing operation NOTE It is recommended that auto changeover mode not be used if the outdoor temperature is consistently lower than 50 F or greater than 80 F these cases select heating or cooling mode only F Unoccupied Override The Occupied button is only active during unoccupied peri ods The Occupied button is inactive during occupied periods If the thermostat is in unoccupied mode and the user presses the Occupied button the set points are changed to the OC1 set points for heating and cooling The icon will flash to show the user that the thermostat is in override The thermostat will remain in override until the next sched uled time period or for the number of allowed override hours programmed in the thermostat configuration Option 18 whichever comes first NOTE If the set points are changed during unoccupied over ride the unoccupied 1 UN 1 set points will be changed G Smart Recovery Heating Mode The smart recovery function is designed to s
7. is out of range then is displayed The valid temperature range for the outdoor air sensor is 38 to 145 F The valid temperature range for the leaving air sensor is 38 to 145 Table 1 Daily Schedule Planner DAY OF THE WEEK Time Heat Cool SCHEDULE UNI 2022 Time Heat Cool Time Heat Cool Time Heat Cool NOTE The cooling temperature set point must be at least 2 degrees higher than the heating temperature set point Copyright 1999 Bryant Heating amp Cooling Systems 11 01A CATALOG NO 809 694
8. nderneath the thermostat cover To access the pro gramming buttons pull on the hinged thermostat cover See Fig 2 The programming buttons are Copy Previous Day Program Mode Change Day End Fan Set Time Temp Occupied and Hold The Up and Down buttons are used to change the current desired temperature set point and to scroll through program ming set points The Up and Down buttons are accessible from the outside of the thermostat The daily schedule can be overridden in 3 ways pressing the Hold button pressing the Up and Down buttons to change the temperature set point or pressing the Occupied button Cancels OM TSTAT 1 OM TSTAT 51 9 15 99 A Programming Button Lockout The thermostat has a lockout feature which will not acknowledge programming buttons until the lockout code is entered After the lockout code has been entered the keypad will remain unlocked until the user has stopped pressing buttons for 2 minutes The lockout feature is configured by the installer NOTE The lockout code sequence is Mode Copy Previous Day Set Time Temp and Hold NOTE The Occupied button is not disabled by the Lockout feature B Hold Button Operation Pressing the Hold button disables the time and temperature schedule and holds the current desired temperature set point When a Hold is active the HOLD annundator is dis played on the thermostat screen To release the Hold press the Hold button a second time The Hold will rem
9. s NOTE There must be at least 2 degrees difference between the cooling and heating set points The thermostat will auto matically change any set points closer than 2 degrees Mode HOLD 0 1 UN1 OC2 UN2 OFF Mo Tu We Th EHEAT Fr Sa Su COOL TIME AM PM AUTO o gt Za AUTO CLEAN FILTER PROGRAMMING AUX HT Fig 1 Thermostat Liquid Crystal Display CHANGE DAY COPY PREVIOUS PROGRAM MODE BUTTON DISPLAY UP BUTTON BUTTON DAY BUTTON BUTTON SCREEN THERMOSTAT SETTIME TEMP OCCUPIED END RESET FILTER HOLD BUTTON DOWN FAN COVER OPEN BUTTON BUTTON PRESS BUTTON BUTTON BUTTON E SIMULTANEOUSLY Fig 2 Thermostat Display and Programming Buttons 5 Press the Program button to advance to the next time period 6 Perform Steps 2 through 5 until the times and tem perature set points have been entered for the entire day Press the Change Day button to move to the schedule for the next day 7 Repeat Steps 2 through 6 to program the remaining schedule days The Copy Previous Day button can be used to copy the previous day s schedule if the sched ules are the same 8 After all the times and set points for each day have been entered press the End button to finish entering the schedule NOTE The thermostat will continue to follow the schedule until a new one is entered The schedule may need to be updated for
10. user s information manual COMMERCIAL THERMOSTAT P N 5 1 IMPORTANT Read entire instructions before programming the thermostat GENERAL Bryant s 7 day commercial programmable thermostats are wall mounted low voltage thermostats which maintain room temperature by controlling the operation of an HVAC heating ventilation and air conditioning system Separate heating and cooling set points and auto changeover capabil ity allow occupied and unoccupied programming schedules for energy savings All thermostats allow up to 4 time and temperature settings to be programmed per 24 hr period Each thermostat stores programs for 7 independent days Batteries are not required During power interruption the internal memory stores pro grams for an unlimited time OPERATION I THERMOSTAT DISPLAY The thermostat display is located in the top center of the thermostat See Fig 1 The following information can be dis played on the screen mode OFF EHEAT COOL AUTO or HEAT fan setting ON or AUTO hold status room temperature desired temperature clean filter status time of day day of the week schedule period OC1 UN1 OC2 or UN2 outdoor temperature optional Il THERMOSTAT PROGRAMMING BUTTONS AND OPERATION The thermostat has programming buttons which are used to change the set points of the thermostat set the modes and program schedules The programming buttons are accessible from u
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