Saswell T21STK-2 Operating Instruction Download Page 2

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T21STK-2 SINGLE STAGE PROGRAMMABLE THERMOSTAT

1 Heat / 1 Cool single stage thermostat.
5+2 Programmable, Compatible with heat pump system

Installation and Operation Manual

Specification:--------------------------------------------------------------------------------

Power Supply:

20VAC-30VAC 50-60HZ or Battery powered.

Terminal Load: 1.0A per terminal, 3.0A maximum total load
Set Point Temperature Range:

45ºF to 90ºF (7ºC to 32ºC).

Accuracy: +/- 1ºF or +/- 0.5ºC.
Dimensions:

6.0” W X 4.7” H X 1.1” D

Color:

White

Summary of Contents for T21STK-2

Page 1: ...1 OPERATING T21STK 2 INSTRUCTION...

Page 2: ...patible with heat pump system Installation and Operation Manual Specification Power Supply 20VAC 30VAC 50 60HZ or Battery powered Terminal Load 1 0A per terminal 3 0A maximum total load Set Point Temp...

Page 3: ...ultaneously Fan switch with ON and AUTO Permanent user setting retention during power loss No batteries are required Operates from 24VAC or from 2 size AA alkaline batteries Optional temperature displ...

Page 4: ...e circuit breaker to the off position before installing removing cleaning or servicing this thermostat Read all of the information in this manual before installing this thermostat Use a professional c...

Page 5: ...ing system and may cause personal injury Replace batteries when the battery icon indicates the low battery message Change the Air Filter when the Filter Change Icon begins blinking Use this thermostat...

Page 6: ...the cover of the old thermostat This should expose the wires 4 Label the existing wires from the existing thermostat before removing 5 After labeling the wires remove the wires from the wire terminals...

Page 7: ...7 INSTALL THE THERMOSTAT ATTACH THERMOSTAT BASE TO WALL PULL THE COVER OFF THE BASE...

Page 8: ...rcuit breaker off 2 Place the system switch COOL OFF HEAT in the OFF position 3 Place the FAN AUTO ON switch in the AUTO position 4 Gently pull the cover straight off the base See figure 1 5 Put the t...

Page 9: ...will not affect thermostat operation 9 Insert stripped labeled wires into matching wire terminals See Wiring Diagrams Figure 2 CAUTION Be sure exposed portions of wires do not touch other wires 10 Tig...

Page 10: ...r thermostat will maintain time and continuously display the temperature during a loss of AC power with the batteries installed 12 Replace the cover on the thermostat by snapping it in place 13 Turn o...

Page 11: ...a call for heat such as fossil fuel gas oil etc forced air system as well as hydraulic heating systems place the fan option switch in the GAS position BATTERY OPERATION The thermostat will operate fro...

Page 12: ...12 Wiring Diagrams Figure 3 Typical wiring diagram for heat cool 5 wire two transformer system...

Page 13: ...13 Figure 4 Typical wiring diagram for heat cool 4 wire single transformer system...

Page 14: ...14 Note Jumper required in heat pump mode Figure 5 Typical wiring diagram for heat pump with reversing valve...

Page 15: ...ch to the OFF position If your system does not have a G Fan terminal connection skip to the Heating System 1 Move the fan switch to the ON position The blower should begin to operate 2 Move the fan sw...

Page 16: ...all for heat at 1 5 F 1 5 C below set point and turn off at set point When the thermostat calls for heat the display will show Heat On If the Heat On display is flashing the compressor lockout feature...

Page 17: ...s for cooling the display will show COOL On If the COOL On display is flashing the compressor lockout feature is operating mode Note See Configuration menu item 8 If all functions operate properly the...

Page 18: ...alled your thermostat will maintain time and continuously display the temperature during a loss of AC power 1 Place the COOL OFF HEAT switch in the OFF position 2 Put the FAN AUTO ON switch in the AUT...

Page 19: ...M button to move to the next menu item or press TIME to return to a previous menu item To revert to factory default settings press the RESET button See Fig 3 All user s changed settings will revert to...

Page 20: ...20...

Page 21: ...preference FA cycles the system at a 0 5 F 0 5 C differential and SL cycles the system at 1 5 F 1 5 C 2 Select heating cycle rate The FA setting is used to produce shorter heating cycles The SL settin...

Page 22: ...ght improves display contrast in low lighting conditions Select 1 for NO backlight display Select 2 for the backlight to come on for approximately 30 seconds when any button of the thermostat is touch...

Page 23: ...increments Selection of 00 WILL CANCEL THIS FEATURE 6 Select F or C readout Changes the display readout to Centigrade or Fahrenheit as required 7 Select temperature recalibration This feature allows y...

Page 24: ...ssor time delay occurs the Cool On or Heat On display will flash during compressor lockout 9 Intelligent recovery When selected 1 The thermostat will calculate how long it takes to bring the room temp...

Page 25: ...move the SYSTEM switch to the OFF position and the FAN switch to the AUTO position 2 Set current day and time Press the TIME button The hours display will begin to blink Press the or buttons until yo...

Page 26: ...ual to 30 days b Move the SYSTEM switch to the HEAT or COOL position then press and hold the and buttons for 5 seconds to review filter running days To exit the review menu press the or buttons one ti...

Page 27: ...mperature at the selected setting until you press the RUN button to restart the program operation 2 Temperature Override When in the program RUN mode Press the or buttons to select the desired room te...

Page 28: ...and temperature follow these steps Determine the time periods and temperatures for your program You must program four periods for each day However you may use the same heating and cooling temperatures...

Page 29: ...29 during each period Fill in the completed table to have a record of your program EXAMPLE Heating Cooling Schedule Plan Factory default program setting...

Page 30: ...to the HEAT position 2 Press PRGM once PRGM SETTING will display and MON TUE WED THU FRI indicating weekday program will appear in the display flashing Also displayed are the current programmed start...

Page 31: ...ture 5 Press PRGM once The currently programmed start time and set point for the 2nd heating program will appear 6 Repeat steps 3 and 4 to select the start time and heating temperature for the 2nd hea...

Page 32: ...ons and Switches Enter the Cooling Program Caution If the outside temperature is below 50 F disconnect power to the cooling system before programming Energizing the air conditioner compressor during c...

Page 33: ...ess PRGM to view the 1st weekday heating period time and temperature Each time you press PRGM the next heating period time and temperature will be displayed in sequence for weekday then Saturday and S...

Page 34: ...vert to factory default settings Including configuration settings Troubleshooting If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation you can reset the...

Page 35: ...35 THERMOSTAT LCD DISPLAY Figure 2...

Page 36: ...36 THERMOSTAT BUTTONS AND SWITCHES Figure 3...

Page 37: ...blanks out the display or causes erratic operation you can reset the thermostat by pressing the reset button see figure 1 If the thermostat haw power has been reset and still does not function correc...

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