Carrier 33CS250-01 User's Manual
Contents
1. 33CS Commercial Programmable Thermostat Owner s Manual Part Number 33CS250 01 GENERAL Carrier s 7 day commercial programmable thermostats are wall mounted low voltage thermostats which maintain room temperature by controlling the operation of an HVAC heating cooling and ventilation system Separate heating and cooling set points and auto changeover capability allow occupied and unoccupied programming schedules for en ergy savings All thermostats allow up to 3 occupied and one unoccu pied time temperature setting to be programmed per 24 hour period Each thermostat stores programs for 7 in dependent days Batteries are not required During power in terruption the internal NEVERLOST memory stores pro grams for an unlimited time IMPORTANT The thermostat has a configurable se curity level If certain functions are not available chang ing set points changing programming schedules the thermostat security level may be configured to ex clude those functions Call the installer to reconfigure the security level CONFIGURATION Thermostat Display The thermostat display is lo cated in the center of the thermostat See Fig 1 The fol lowing information can be displayed on the screen e mode OFF HEAT COOL AUTO or PROGRAM ON fan setting FAN ON or blank override indication room temperature desired temperature service filter indicator time of day day of the week schedule period2. The Fan button selects fan operation When the fan is set to FAN ON the fan will run continuously for improved air circulation NOTE When the thermostat is in Unoccupied mode the fan will run only during heating or cooling operation even if the fan is set to FAN ON this is the energy saving smart fan feature When the fan is not set to FAN ON no icon displayed on thermostat screen the fan will run during heating and cool ing operation only MODE BUTTON OPERATION The Mode button se lects the operating mode of the thermostat If OFF is se lected the thermostat will not enter Heating 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 thermostat will enter Heating or Cooling mode based on the room temperature and the heat ing and cooling set points If PROGRAM ON is selected the stored schedule is enabled and the thermostat will follow the Occupied and Unoccupied schedules stored in its memory 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 thermostat will automatically switch to maintain the desired temperature setting The thermostat does not need to be m
3. Occupied 1 2 or 3 or Unoccupied setup indicator programming mode lock indicator start stop indicator schedule period program mode Heat or Cool Indicator A Heat or Cool indicator is located on the bottom left cover of the thermostat See Fig 2 The light will be red if the thermostat is in Heating mode The light will be green if the thermostat is in Cooling mode PROGRAM ON MODE SETUP MODE INDICATOR INDICATOR START STOP OCCUPIED TIMES PROGRAMMING SECURITY UNOCCUPIED INDICATOR INDICATOR MODE INDICATOR en COOLING DAY OF H E jam ProgramOniSetup SET POINT THE WEEK NG Pm StopStart Locked COOLING SMTWTFS unoccupied123 iceFi E o MODE INDICATOR SERVICE FILTER Service Filter P AUTO Override OVERRIDE AUTO MODE OFF MODE INDICATOR INDICATOR gt A SL HEATING OFF MODE I MODE INDICATOR INDICATOR FanOn m m L ee FAN SET POINT OPERATION ROOM TEMPERATURE Fig 1 Thermostat Display Thermostat Front Panel Buttons The thermo Stat has buttons on the front cover which are used to raise or lower the desired set point and override the current program See Fig 2 SET POINT BUTTONS The UP ARROW and DOWN ARROW buttons will raise or lower the current desired tem perature set point If the thermostat is in AUTO mode press ing the UPARROW or DOWN ARROW buttons will adjust both the heating heating and cooling set points Pressing the UP ARROW or DOWN ARROW buttons in Cooling mode wi
4. occupied HEAT l IL Fig 5 Setting Occupied 1 Set Points The cooling set point for Unoccupied will be displayed Use the UP ARROW and DOWN ARROW buttons to raise or lower the cooling set point until the desired tem perature is shown The range of acceptable values is 35 to 99 F 1 to 37 C or OF no unoccupied cooling Press the Mode button to continue The heating set point for Unoccupied will be displayed Use the UP ARROW and DOWN ARROW buttons to raise or lower the heating set point until the desired tem perature is shown The range of acceptable values is 35 to 99 F 1 to 37 C or OF no unoccupied heating Press the Mode button to continue The day of the week will be shown Use the UP AR ROW and DOWN ARROW buttons to change the day of the week until the desired starting day is shown Pos sible choices are M Monday through S Sunday Press the Mode button when the desired day is shown The Start Time for Occupied 1 will be displayed Use the UPARROW and DOWN ARROW buttons to raise or lower the time until the desired Start Time is shown Press the Mode button to continue See Fig 6 The Stop Time for Occupied 1 will be displayed Use the UPARROW and DOWN ARROW buttons to raise or lower the time until the desired Stop Time is shown Press the Mode button The On Off icon will be displayed Use the UP AR ROW to turn the Occupied 1 period ON for this day Use the DOWN
5. ARROW to turn the Occupied 1 period OFF for this day Repeat Steps 2 through 9 to program the remaining sched ule for occupied periods 2 and 3 if selected in Step 1 Start occupied FUL Am Fig 6 Start Time Display 11 The Copy command can be used to copy the previous day s schedule if the schedules are the same The copy command becomes available after all the occupied pe riods are programmed in a day Use the UP ARROW to change the copy command to YES Use the DOWN AR ROW to change the copy command to NO Press the Mode button when the choice has been made See Fig 7 If NO was selected the schedule will automatically change to the next day and the user must enter the occupied and unoccupied schedules for that day NOTE Occupied 1 schedule heating and cooling set points are the same for each day Occupied 2 and 3 set points may be set to different values for each day of the week If YES was selected the schedule will be copied to the next day The schedule copy may be repeated until Sun day is reached The Sunday schedule cannot be copied to Monday 12 After all the times and set points for each day have been entered press the Program button to finish entering the schedule NOTE The thermostat will continue to follow the schedule until a new one is entered If only one occupied schedule is selected the Occupied 2 and 3 schedules are skipped If the start time is set later in the day than th
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9. anually changed from heating to cooling or cooling to heating operation HOLIDAY MODE The Holiday button places the ther mostat into Holiday mode During Holiday mode the un occupied set points are enforced The number of days the thermostat will be in Holiday mode can be set Set Clock The Set Clock button allows the user to change the time and day displayed on the thermostat Press the Set Clock button to enter Set Time mode See Fig 4 The current time will blink on and off Press the UP ARROW and DOWN ARROW buttons until the correct time is shown Hold down the buttons to quickly move through the time display The AM and PM annunciators will automatically change To scroll through by hours only press and hold down the fan button while pressing the UP ARROW or DOWN ARROW buttons To ensure the schedules are properly fol lowed make sure that AM or PM is correct for the time cho sen When the correct time is shown press the Mode button to modify the day of the week The current day will blink on and off Press the UP ARROW and DOWN ARROW but tons until the correct day is shown Press the Set Clock but ton again to exit the Set Time mode AH Ei Fig 4 Setting the Clock Programming Thermostat Schedules Be fore programming the thermostat plan the thermostat daily schedule The schedule is divided into 7 days Monday through Sunday Each day can have 2 Occupied 1 Unoccupied 3 Occupied 1 Occupied 2 U
10. at will follow the Occupied and Unoccu pied schedules stored in its memory 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 thermostat 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 heating operation Two Stage Operation The second stage of heat or cool is turned on when the first stage has been on for a mini mum of 2 minutes and the temperature differential from the set point is equal to or greater than the set point plus the deadband plus 2 degrees Clock Backup In the event of a power loss the ther mostat will keep time for a minimum of 48 hours without external power or batteries Fan Operation If Fan On is selected the fan will run continuously during occupied schedule except when Mode Is switched to OFF The fan will be off during unoccupied schedule except during heating or cooling operation If Fan On is not selected the fan will only operate during heating or cooling operation Emergency Heat Emergency heat is available for heat pump applications To turn on emergency heat press and hold the Fan button While holding the Fan button press the UP button for 2 seconds An EH will be displayed During emergency heat the fan will operate and the second s
11. e stop time the program will run from midnight of that day to the stop time and then from the start time to midnight If the same start and stop times are programmed for an occupancy schedule the thermostat will be in Occupied mode for 24 hours If one occupied period starts or stops within another oc cupied period the lower numbered schedule has priority For example if schedule Occupied 3 is running for 24 hours and occupied schedule 2 comes on from 1 to 3 PM the set points from Occupied 2 are in effect from 1 to 3 PM OVERRIDING THE SCHEDULE The schedule can be overridden during operation by pressing the UP or DOWN ARROW buttons to change the desired temperature The ther mostat will use the new set point until the next scheduled time period starts NU T OT LL py Fig 7 Copy Command Display OPERATION The Mode button selects the operating mode of the ther mostat If OFF is selected the thermostat will not enter Heat 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 ther mostat will only enter Cooling mode if the room tempera ture is above the cooling set point If AUTO is selected the thermostat will enter Heating or Cooling mode based on the room temperature and the heating and cooling set points If PROGRAM ON is selected the stored schedule is enabled and the thermost
12. g con figured days have passed press the Holiday button to enter into the configuration mode Press the DOWN ARROW to set the number of days to zero Holiday mode will be disabled Dry Contact Switch A dry contact switch is pro vided to allow an external device to force the thermostat into Occupied 1 When the thermostat is forced into Occupied 1 via the dry contact closure the Occupied 1 icon will blink each second SOFT START When multiple thermostats are controlled by the same external device a Soft Start option can be used to stagger the turn on times of the HVAC equipment This feature may cause a delay in operation after entering Occupied 1 Remote Temperature Sensor A remote tempera ture sensor is available to read the temperature from a space If a remote temperature sensor is connected the thermostat will ignore the reading of its internal sensor When the ther mostat is using a reading from a remote sensor the degree symbol above the temperature reading will blink Table 1 Daily Schedule Planner SCHEDULE DAY OF THE Occupied 1 Occupied 2 Occupied 3 Unoccupied WEEK Start Stop Heat Cool Start Stop Heat Cool Start Stop Heat Cool Heat Cool NOTE The cooling temperature set point must be higher than the heating temperature set point yonposd ey yum paijddns saaye QUE JEA Jayjo Aue sapasiedns 661 lenuef aye pelnjoejnuew sjonpoid uo sapay 829 608 ON DOTWLYO 1e1S O
13. ll adjust only the cooling set points Pressing the UP AR ROW or DOWN ARROW buttons in Heating mode will ad just only the heating set points The UP ARROW and DOWN ARROW buttons are also used in programming mode OVERRIDE BUTTON The Override button is used to force the thermostat from Unoccupied mode into the Occu pied 1 mode comfort settings The Override period will be set at 30 minutes The thermostat will then return to Unoc cupied mode To increase the amount of time in Override mode press the Override button again Thirty minutes of over ride time will be added for each time the Override button is pressed up to a maximum of 4 hours After the 4 hour limit has been reached press the Override button again to cancel override mode While in Override mode the Override icon and the Oc cupied 1 icon will be displayed on the thermostat The time of day and the minutes remaining in Override mode will al ternate on the thermostat display The set points are adjustable with the UP ARROW and DOWN ARROW keys during Override mode Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 533 318 Book 1 4 PC 111 Tab 11lal13a Printed in U S A Form 33CS 4SO Pg 1 12 97 Replaces New NOTE If the thermostat is in Occupied mode and the Over ride button is pressed the thermostat will go into Unoccu pied mode immediately The the
14. noccupied or 4 Occupied 1 Occupied 2 Occupied 3 Unoccupied time periods Each occupied time period has a start time stop time heating set point and cooling set point The unoccupied time period has a heating set point and a cooling set point The unoccupied time period is active whenever an occupied time period is not active Fill in Table 1 on page 5 as an aid to program ming the daily schedules PROGRAMMING MODE To program the daily sched ules perform the following procedure 10 Enter programming mode by pressing the Program but ton The Occupied 1 annunciator will appear on the ther mostat display See Fig 5 Use the UP ARROW and DOWN ARROW buttons to set the maximum number of Occupied periods available The thermostat can be set to 1 2 or 3 After the number of Occupied periods has been selected press the Mode button The cooling set point for Occupied 1 will be displayed Use the UP ARROW and DOWN ARROW buttons to raise or lower the cooling set point until the desired tem perature is shown The range of acceptable values is 35 to 99 F 1 to 37 C Press the Mode button to continue See Fig 5 The heating set point for Occupied 1 will be displayed Use the UP ARROW and DOWN ARROW buttons to raise or lower the heating set point until the desired tem perature is shown The range of acceptable values is 35 to 99 F 1 to 37 C Press the Mode button to continue See Fig 5 708 CooL
15. rmostat will remain in Un occupied mode until the next Occupied start time Thermostat Programming Buttons The ther mostat 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 un derneath the thermostat cover To access the programming buttons pull on the hinged thermostat cover See Fig 3 The programming buttons are Mode Fan Holiday Program and Set Clock BACKLIT LCD DISPLAY WARMER OR BUTTON COOLER OR BUTTON OVERRIDE BUTTON HEAT OR COOL INDICATOR Red Heat Green Cool HOLIDAY SET CLOCK FAN PROGRAM Fig 3 Thermostat Programming Buttons The UP ARROW and DOWN ARROW buttons are used to scroll through programming set points The buttons are also used to answer yes or no KEYPAD LOCK The thermostat has a keypad lockout feature which will not acknowledge front panel buttons until the lockout sequence is entered To disable or lock the key pad press and hold the Override button While holding down the Override button press the UP and DOWN ARROW but tons simultaneously The Locked icon will appear on the display The thermostat is unlocked by performing the same pro cedure Press and hold the Override button While holding down the Override button press the Up and Down Arrow buttons simultaneously The Locked icon will be re moved from the display FAN BUTTON OPERATION
16. tage of heat will be energized locking out the first stage compres sor To exit emergency heat press and hold the Fan button While holding the Fan button press the UP button for 2 sec onds During emergency heat only OFF and HEAT modes are available Electric Heat When the Electric Heat option in the advanced set up is set to ON configured by installer the thermostat will turn on the fan immediately any time there is a heat demand This feature should only be used on elec tric heating applications Do not use with gas heat Holiday Mode When the thermostat is in Holiday mode the thermostat will operate under Unoccupied set points To configure and activate the Holiday mode press the Holiday button The HOL icon will be displayed along with the remaining days of Holiday mode operation Press the UP or DOWN ARROWS to select the number of days that the holi day schedule will be in effect A value of 0 disables Holiday mode The duration can be set from 1 to 99 days The ther mostat will enter Holiday mode on midnight of the next day after the mode has been activated Holiday mode will re main in effect until midnight of the last configured day If the Holiday mode is in effect the number of days re maining will blink on and off and the Unoccupied icon will be displayed The Override button will be active during Holiday mode The Dry Contact Switch is ignored To turn off the Holiday mode before the remainin
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