® MRCOOL ® Universal WiFi Thermostat
Contents APPLICATION ----------------------------------------------------- 1 FEATURES ------------------------------------------------------- 2 SPECIFICATIONS -------------------------------------------------- 3 INSTALLATION ---------------------------------------------------- 5 WIRING -------------------------------------------------------- 13 POWERING THE THERMOSTAT ----------------------------------------- 30 INSTALLER SETUP ------------------------------------------------ 32 OPERATION ------------------
APPLICATION MRCOOL® Wi-Fi touchscreen programmable thermostat is a 7-Day programmable thermostat that provides universal system compatibility, precise comfort control and effortless programming. MRCOOL® provides temperature control for gas, oil, electric and heat pumps for up to 3 heating and 2 cooling systems. Not only can you remotely monitor and control the heating and cooling system in your home or business — you can stay connected to your comfort system wherever you go.
FEATURES • Large, clear display with backlight shows temperature, set temperature and humidity. • Menu-driven programming makes setup effortless. • Beautiful ergonomic design is smart and sophisticated to match your lifestyle. • Touchscreen capability.
SPECIFICATIONS Temperature Setting Range: Heating: 40°F to 90°F ( 4°C to 32°C). Cooling: 50°F to 99°F (10°C to 37°C). Operating Ambient Temperature: 32°F to 122°F (0°C to 50°C). Shipping Temperature: 14°F to 140°F ( -10°C to 60°C). Operating Relative Humidity (Non-condensing): IRS –1: 5% to 95%. ORS -1: 5% to 95%. Humidity Display Range: 0% to 99%.
+/- 2 minute per month. Cool Indication: Show "Cool On" on the screen when Cool is activated. Heat Indication: Show "Heat On" on the screen when Heat is activated. Auxiliary Heat Indication: Show "Aux On" on the screen when Auxiliary Heat is activated.
INSTALLATION When Installing this Product 1. Read these instructions carefully. Failure to follow the instructions can damage the product or cause hazardous conditions. 2. Check the ratings given in the instructions to make sure the product is suitable for your application. 3. Installer must be a trained, experienced service technician. 4. After completing installation, use these instructions to check out the product operation. Selecting Location Install the thermostat about 5 feet (1.
---Radiant heat from sun or appliances, concealed pipes and chimneys. ---Unheated or uncooled areas such as an outside wall behind the thermostat. Mounting Means: Mounts directly on the wall in the living space using mounting screws and anchors provided. Dimensions: 1. MRCOOL® dimensions: see Fig. 1. 2. MRCOOL® back case: see Fig. 2. 3. MRCOOL® cover plate: see Fig. 3.
Fig. 1. Thermostat Dimensions in inches.
Fig. 2. Thermostat back case dimensions in inches. (mm).
Fig. 3. Thermostat cover plate dimensions in inches. (mm).
Fig.4. Selecting thermostat location.
Installing Wall plate CAUTION Electrical hazard can cause electrical shock or equipment damage. Disconnect power before wiring. The thermostat can be mounted horizontally on the wall. 1. Position and level the wall plate (for appearance only). 2. Use a pencil to mark the mounting holes. 3. Remove the wall plate from the wall and drill two holes in the wall as marked. Gently tap anchors (provided) into the drilled holes until flush with the wall. 4.
Fig.5. Mounting wall plate.
WIRING All wiring must comply with local electrical codes and ordinances. 1. See Table 1 and Fig.6 for terminal designation descriptions. Insert wires in the terminal block under the loosened screw. See Fig.7. 2. Securely tighten each screw. 3. Push excess wire back into the hole. 4. Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat.
Table 1. Terminal Designation Descriptions.
NOTES: 1. When used in a single -transformer system, leave metal jumper wire in place between RC and R. If used on a two -transformer system, remove metal jumper wire between RC and R. 2. If thermostat is configured for a heat pump system, configure changeover valve forcool or heat. 3. L terminal is an input port as system monitor. Fig.6.Terminal identifications for system.
Fig.7. Inserting wires in terminal block. IMPORTANT: Use 18 gauge thermostat wire.
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. Fig. 8. Typical hookup of conventional single-stage heat and cool system with single transformer (1H/1C conventional).
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. Fig. 9. Typical hookup of conventional single -stage heat and cool system with two transformers (1H/1C conventional).
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. Fig. 10. Typical hookup of heat -only system (1H conventional).
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. Fig. 11. Typical hookup of heat only system with fan (1H conventional).
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. Fig. 12. Typical hookup of heat only power to open and power to close zone valve system.
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. Fig. 13. Typical hookup of heat only system with normally open zone valves.
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. Fig. 14. Typical hookup of cool only system (1C conventional).
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. Fig. 15. Typical hookup of conventional multi-stage two-stage heating and two-stage cooling in a single-transformer system (2H/2C, 2H/1C or 1H/2C conventional).
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. Fig. 16. Typical hookup of conventional multi-stage two-stage heating and two-stage cooling in a two-transformer system (2H/2C, 2H/1C or1H/2C conventional).
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. 3. "O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP. Fig. 17. Typical hookup of single -stage heat pump with no auxiliary/backup heat (1H/1C heat pump).
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. 3. MUST CONNECT THE 24VAC COMMON WHEN USING L. THE TERMINAL IS SHOWN AS EQUIPMENT MONITOR . 4. "O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP. Fig. 18. Typical hookup of multi-stage heat pump with no auxiliary/backup heat (2H/2C heat pump).
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. 3. MUST CONNECT THE 24VAC COMMON WHEN USING L. THE TERMINAL IS SHOWN AS EQUIPMENT MONITOR. 4."O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP. Fig. 19. Typical hookup of single-stage heat pump with auxiliary/backup heat (2H/1C heat pump).
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2. FACTORY INSTALLED JUMPER. 3. MUST CONNECT THE 24VAC COMMON WHEN USING L. THE TERMINAL IS SHOWN AS EQUIPMENT MONITOR. 4. "O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP. Fig. 20. Typical hookup of multi-stage heat pump with auxiliary/backup heat (3H/2C heat pump).
POWERING THE THERMOSTAT Wiring 24VAC Common ·Single-TransformerSystem: Connect the common side of the transformer to the C screw terminal of the thermostat wall plate. Leave the metal jumper wire in place between RC and R. ·T wo-Transformer System: Connect the common side of the cooling transformer to the C screw terminal of the thermostat wall plate. Remove the metal jumper wire between RC and R. Mount Thermostat to Wall Plate Align the terminal screw blocks with the pins on the back of the thermostat.
Fig. 21. Mount thermostat to wall plate.
INSTALLER SETUP Follow these steps to enter the Installer Setup: 1. See Fig. 22-1. Press and release the Key. System mode will blink, then press and hold the key for Fig.22-1 approximately 5 s econds until the screen changes. Menu numbers will display at bottom right corner. See Fig. 22-2. Fig.22-2.
2. Press or key to cutover submenu, and press key enter the installer setup, or press to exit without saving changes. submenu. Under submenu use or to set parameters. See Fig. 22-3. Fig. 22-3. Note: See Tables 2 for the Installer Setup Numbers and Settings.
Table 2.installer Setup Menu.
Number Name Settings Notes 1-1heat/1cool conventional (default setting) 2-single-stage heat pump (no auxiliary heat) 3-heat only conventional (no fan) 4-heat only conventional (with fan) 5-heat only (power to open and close zone) 0170 System Type Selection valves or normally-open zone valves) 6-cool only conventional 7-2heat/1cool heat pump (with auxiliary heat) Available options and defaults vary by thermostat.
Number Name Settings 0-gas or oil furnace equipment controls fan in 0180 Fan Control in heating (factory setting) Heating 1-electric furnace thermostat controls fan in heating Notes Only shown if conventional system is selected. If heat pump is chosen, fan defaults to electric.
Number 0220 Name Leave mode 40 ℉ - 62 ℉ : leave mode heating, the range heating of setting temperature（1 ℉ difference） setting 4 ℃ - 16 ℃ : leave mode heating, the range of temperature setting temperature（0.5 ℃ difference） Leave mode 0230 cooling setting temperature 0280 Settings Notes 76 ℉ - 99 ℉ : leave mode cooling, the range of setting temperature（1 ℉ difference） 24 ℃- 37 ℃ : leave mode cooling, the range of setting temperature（0.
Number 0300 Name Changeover Settings 0-manual changeover (factory setting) 1-auto changeover 2 - 2°F (1.5°C) 0310 Dead band 5 - 5°F (3°C) 8 - 8°F (4.5°C) Temperature 0320 Indication Scale 38 Notes 3 - 3°F (2°C) 6 - 6°F (3.5° C) 9 - 9°F (5°C) 0 - Fahrenheit (factory setting) 1 - Celsius 4 - 4°F (2.5°C) 7 - 7°F (4°C) Shown only if 0300 is selected.
Number 0330 0340 0350 Name 1stage hysteresis 2stage hysteresis 3stage hysteresis Furnace 0500 Change Reminder Settings Notes Fahrenheit value is 2 1 F - 3 F (default 2F） times of centrigrade value Fahrenheit value is 2 1 F - 3F (default 2F) times of centrigrade value Fahrenheit value is 2 1 F - 3 F （default 2F） times of centrigrade value 0 - furnace filter reminder off 1 - 10 run time days 2 - 30 run time days Run time based on call 3 - 60 run time days 4 - 90 run time days for fan.
Number Name Settings Notes 1 - Adaptive Intelligent Recovery control is 0530 Adaptive activated (system starts early so set point is Intelligent reached by start of program period). Recovery 0 - Conventional Recovery (system starts recovery at programmed time) 0540 0580 40 Number of Periods 2 - two periods available (Wake and Sleep) Only shown if schedule 4 - four periods available (Wake, Leave, Return is enabled.
Number Name Heat 0600 Temperature Range Stop Cool 0610 Temperature Range Sto p 0640 Clock Format Settings 40-90 - temperature range (1°F increments) of heating set point. 50-99 - temperature range (1°F increments) of cooling set point. Notes Shown in 1/2 °C. Shown in 1/2 °C.
Number Name Settings Notes 0 - No extended fan operation aftercall for heat 0650 Extended Fan ends. Not shown in Cool Only On Time Heat 90 - Fan operation is extended 90 seconds after Systems call for heat ends. 0 - No extended fan operation after call for cool 0660 Extended Fan ends Not shown in Heat Only On Time Cool 90 - Fan operation is extended 90 seconds after Systems. call for cool ends.
Number 0700 0710 Name Settings Temperature -9°F ~ 9°F (°F as temperat ure format) Display -4.5°C ~ 4.5°C (°C as temperature format) Offset 0°F (0°C) (factory setting) Reset Thermostat 0 - No thermostat reset. 1 - Resets all Installer Setup Options to default values and resets schedule to default setting. Notes Only calendar settings and time are retained.
OPERATION Fan Choose fan mode Fig. 23.
Fig. 24.
User Setup Follow these steps to enter the User Setup: 1. key for approximately 3 s econds until the screen changes. Press and hold the Menu number will display at bottom right corner. 2. Press or key to cutover to submenu, and press Under submenu use 3. Press or key enter submenu. to set parameters. key to exit and confirm the user setup, or press to exit without saving changes.
Table 3. User Setup Settings.
Number 0670 0700 Description Keypad Lockout Temperature Display Offset Settings 0 - Unlocked keypad 1 - Locked keypad -3°F ~ 3°F (°F as temperature format) -1.5°C ~ 1.5°C (°C as temperature format) 0°F (0°C) (factory setting) 0 - No thermostat reset. 0710 Reset Thermostat 1 - Resets all Installer Setup Options to default values and resets schedule to default setting.
Date/time Setting 1. Consult USER SETUP, choose submenu number 0150 enter date and time setting. 2. Press to switch from date to time in the following order: year, month, day, hour, and minute. Press or to adjust the time. (You can Fig.25 advance the time more quickly by holding the key or key buttons.) 3. Press to save changes and exit or press to exit without changing the date and time.
Setting the fan 1. Press to select fan operation. 2. Press again to select ON or AUTO (toggle to re -select). The selected option blinks. 4. Press or press to save setting to exit without saving changes. ON: Fan is always on. AUTO: Fan runs only when the heating or cooling system is on. 50 Fig.
Selecting system mode 1. Press to display options. 2. Press again to select an option. You may need to press two or three times to make a selection—the selected option blinks. 3. Press or press to save setting to exit Fig.27 without saving changes.
Possible system modes: HEAT: Controls only the heating system. COOL: Controls only the cooling system. OFF: Heating/cooling systems are off. AUTO: Selects heating or cooling depending on the indoor temperature. EMER (heat pumps with aux. heat): Controls auxiliary/emergency heat when compressor is locked out. Note: The AUTO and EMER system settings may not ap pear, depending on how your thermostat was installed. Note: When under auto mode press and cooling.
Set Temperature Overrides Lake has two temperature override options: Override Until and Permanent Override. Override Until Holds temperature temporarily until the next scheduled period time. 1. or key to adjust temperature you want, the icon Until appears Press above Time, and the Time becomes next scheduled period time. 2. Press key to exit and confirm the changes, or press saving changes. 3. key.
Permanent override Keep user settings permanently. Press key once. Screen shows Permanent Hold. 2. Press or 3. If you want to exit, please press 1. 54 key to adjust temperature you want. key again.
Cleaning Thermostat Screen The thermostat has touch screen interaction. Follow these steps to clean the screen without making thermostat changes: 1. Press and hold the key for approximately 3 s econds until the screen changes. Th ermostat locks out all touch keys for 30 seconds to allow for cleaning. See Fig. 2 8. 2. Fig.2 8. Use damp cloth slightly moistened When finished, press key to return to the Home Screen and normal with water or house-hold glass operation. See Fig.2 9.
Screen Locks In User or Installer Setup, menu 0670 allows you to prevent changes to all of the touchscreen functions.In this case, all keys are locked and not functional, the screen displays a lock icon continuously. User setup can also be Fig.29. IMPORTANT: Do not spray any type of liquid directly on the thermostat itself. If using household glass cleaner, spray cleaner on cloth. Then use the cloth to clean the thermostat screen. 56 used to unlock keys and restore the touchscreen functions .
Setting Filter Reminder Intervals If activated during installation, the filter reminder alerts you by flashing on screen above the time when it is time to replace your filter. Press after changing the filter, to restart the timer.To change the Fig.30 reminder interval: Note: 1. Press and hold the about 3 seconds until screen changes. 1. System setting function 0500 Press or to select the desired interval (in days), then 2.
Connecting to your Wi-Fi network To complete this process, you must have a smart phone connected to your home wireless network. Please scan the following code to download “MRCOOL Universal” App. iPhone Android If you get stuck... At any point in this procedure, restart the thermostat by removing the thermostat from the wall plate, wait a few seconds, and snap it back onto the wall plate. Return to Step 1 in this procedure, which starts on the next page.
1. Please be sure your phone has connected WiFi (don’t connect the hidden internet), download “MRCOOL Universal”. 2. Open App and register. ® Fig. 31. Fig. 32. 3. After login, press top left corner , choose WiFi connection and input the WiFi password, DON’ T press the “connect” and continue next step first.
Fig. 33. 4. Press the key Fig. 34 on thermostat screen until the “ Fig. 35 60 ” flash.
5. Now you can press the “connect” on app, app will show processing and after seconds it will show a successful connection. Fig. 36. Fig. 37.
Note: 1. If connected WiFi successfully, it will show on the thermostat, otherwise it . will show 2. Each configuration needs to be finished within 5 minutes, otherwise the thermostat will quit configuring.
Leave mode Press the on homepage and the Universal Thermostat will switch to leave mode. (You can set the temperature you need under leave mode. See the following programming to set the temperature.) If the Universal Thermostat has been under leave mode, on homepage to quit the press mode and recover the previous status. Fig. 38.
PROGRAMMING Table 4. Schedule Default Program Settings.
Program Heating and Cooling Schedule Your thermostat can control up to four different schedule periods per day: Wake - Period when you awaken and want your home at a comfortable temperature. Leave - Period when you are away from home and want an energy-saving temperature. Return - Period when you return home and want your home back to a comfortable temperature. Sleep NOTE: - Period when you are asleep and want an energy-savi ng temperature. Schedule times are in 15-minute intervals.
Edit Schedule 1. adjust the temperature. Press Press , the screen will change. See Fig. 39 and 40. to turn to next time period. Fig. 40 Fig. 39. 2. press time. Press setting. 3. 66 .
4. Repeat the above steps until completing the setting of four time periods. Then, press to turn to next day, until completing the setting of a week. 5. To end program setting, press setting, or press key to exit and confirm the program to exit without saving changes. NOTE: The Fan setting is auto as default and cannot be programmed.
Copy One Day Program After entering a day program you can copy this into another day to save time when creating a weekly program: for example, if you want to copy the program of Monday to Thursday, the methods are as follows: 1. Select the program for Monday, complete the setting of Monday and press icon appears on the screen, and the icon waiting to be selected or skipped. Press or Will blink, that indicates to select, press to skip. to select Thursday, then press 2. Copy to Thursday: press 3.
Reset Schedule Your thermostat can reset schedule setup option to default setting. Press and hold then release key for approximately 3 seconds until the screen changes as Fig.41, key. Now the setting of schedule resets to default setting as table 4. Fig. 41.
FCC Note Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: —Reorient or relocate the receiving antenna. —Increase the separation between the equipment and receiver. —Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
TROUBLESHOOTING Symptom No LCD d isplay Temperature settings Possible Cause Action Thermostat is not being powered. Check 24VAC between C and R. The upper or lower Check temperature set-points. temperature limits were Check Installer Setup Numbers reached. 0600 or 0610, modify as needed. do not change. Check Installer Setup Number The keypad is fully locked. 0670 to change keypad locked options.
Symptom Possible Cause Action Thermostat minimum Wait up to five minutes for the off-time is activated. system to respond. Heating or cooling Sy stem selection is not set Set system selection to correct does not come on. to Heat or Cool. position. System type selection is incorrect. Check Installer Setup Number 0170 and make sure correct system type is chosen.
Symptom Possible Cause Check wiring. Thermostat is calling for Heat (Heat on) or Cool (Cool on) but no heating or cooling is Check Installer Setup Number Heating or cooling 0170 and make sure correct equipment is not operating. system type is chosen. Verify operation of equipment in running. System T est mode. Fan does not turn on Fan Control in Heating is set in a call for heat to Gas or Oil Furnace (electric furnace). (Setting 0180).
Symptom Possible Cause Heat pump puts out Changeover Valve is not cool air in the heat configured to match the mode and warm air in changeover required by the installed heat pump. the cool mode. The heating equipment is Both the heating and cooling equipment are running at the same time. Action Set Changeover Valve (Installer Setup Number 0190) to match the changeover required by the installed heat pump.
Symptom Heating equipment is running in the cool mode. Heating equipment does not turn off and heat temperature setting is set below room temperature 76 Possible Cause Action Heating equipment is not a Set System Type (Installer Setup heat pump but System Type Number 0170) to match the (Installer Setup Number installed heating and/or cooling 0170) is set to Heat Pump. equipment.
Symptom Possible Cause Action Cannot set the System Type is set to Cool Set System Type (Installer Setup system setting to Only or Heat Only or Heat Number 0170) to match the Heat or Cool. Only with Fan. installed equipment. System is not set to Heat Set the system setting to Heat Heat On is not in the display. Cool On is not in the display. and/or temperature is not and set the temperature setting above room temperature. above the room temperature.
Symptom Wait is in the display. Possible Cause Compressor minimum off timer is active. Screen Locked appears on the screen and the keys do not respond. 78 Action Wait up to five minutes for the cooling or heating (heat pump) equipment to turn on. Check Installer Setup Number The keypad is locked. 0670 to change keypad locked options.
