Related Manuals for Robertshaw 9720
Summary of Contents for Robertshaw 9720
- Page 1 9720 DELUXE PROGRAMMABLE ® THERMOSTAT ™ I N T E G R A T E D C O M F O R T S O L U T I O N S HEAT PUMP 7 Day Programmable 3 Heat / 2 Cool User’s Manual...
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Page 2: Product Features
PRODUCT FEATURES • Attractive, Styleline™ design • 7-day programming; 4 setpoints per day • 4 pre-programmed setpoints • EnergyStar ® compliant • QuickSet™ programming mode • Autochangeover mode automatically switches system from heat to cool • Programmable fan control • Detachable sub-base allows you to remove mounted thermostat for easy, convenient programming •... -
Page 3: Keypad Quick Reference
KEYPAD QUICK REFERENCE SET - Begins, saves, and advances programming inputs PROG/MAN - Sets thermostat to either program or manual mode. Provides quick PROG/MAN return to normal operating mode from any menu AUTO FAN QUICKSET - Allows quick programming by QUICKSET MAIN DISPLAY (OFF MODE) enabling user to program all seven days at... -
Page 4: Table Of Contents
The Robertshaw Item 9720 is directly compatible with 24V AC multi-stage heat pump systems with up to 3 stage heat/2 stage cool. It will operate with multi-stage heat pump systems that are automatic or manual changeover and have auxiliary or emergency heating. There are no optional items required for standard system installations. -
Page 5: Important Safety Information
IMPORTANT SAFETY INFORMATION WARNING: ■ Always turn off power at the main power source by unscrewing fuse or switching circuit breaker to the off position before installing, removing, or cleaning this thermostat. ■ Read all of the information in this manual before programming this thermostat. ■... -
Page 6: Helpful Programming Tips
IMPORTANT SAFETY INFORMATION (CONT.) ■ Do not switch system to cool if the temperature is below 50°F (10°C). This can damage the cooling system and may cause personal injury. ■ This thermostat is 24V AC powered and requires connection to both sides of transformer for proper operation. - Page 7 HELPFUL PROGRAMMING TIPS (CONT.) ■ The Energy Efficient Recovery (EER™) feature looks ahead up to 2 hours prior to the end of the set-back (or set-up) period to begin monitoring system performance and calculating when to turn on the system. It also determines whether the auxiliary heat or cool stages should be activated prior to setpoint time to meet your chosen setpoint temperature.
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Page 8: Niteview™ Lcd Display Backlight
NITEVIEW™ LCD DISPLAY BACKLIGHT This thermostat incorporates a revolutionary new display backlight to make nighttime temperature or program adjustments quick and easy. The NiteView™ display backlight uses modern lighting technology to provide an even-flowing light behind the display. There are two ways to activate the backlight: 1. -
Page 9: Removing Thermostat From Wiring Subbase
REMOVING THERMOSTAT FROM WIRING SUBBASE Your new thermostat can be removed from its wiring subbase for easy programming, resetting the thermostat, or changing the batteries. The wiring subbase will remain attached to the wall. To remove thermostat from wiring subbase: AUTO FAN 1. - Page 10 To replace thermostat onto wiring subbase (cont.): 3. Press SYSTEM button to put the thermostat into HEAT, SYSTEM COOL, EMER, or AUTO mode. The thermostat will return to normal operating mode. You may reset the thermostat at any time. Reset is located on the back side of thermostat in the lower, right corner.
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Page 11: Programming
PROGRAMMING Set or Change Time, Day, Temp. Differential, and Residual Cooling NOTE: During programming, the setting to be changed will appear on the display. If no key presses are made within 45 seconds, the display will revert to the main display. Press PROG/MAN button at any time during programming to return to the main display. - Page 12 PROGRAMMING 5. Press SET button. The first stage temperature differential (1˚F) will appear on the display as 10˚. 6. Press either ∨ or ∧ button to change the first stage temperature differential. The differential may be adjusted from .5˚F (05˚), 1˚F (10˚), 1.5˚F (15˚), or 2˚F (20˚).
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Page 13: Selecting ˚F/˚C
Selecting ˚F/˚C The thermostat displays temperatures in degrees Fahrenheit. If you wish to change the readout to Celsius: 1. Press and hold SET button while pressing ∨ button. Release both buttons. The display will switch from Fahrenheit to Celsius. If you wish to switch back to Fahrenheit, simply repeat this step. - Page 14 PROGRAMMING NOTE: New dip switch settings for dip switch #2 will not register or operate options until the RESET button is pressed. Pressing RESET will erase any previously entered programming information. NOTE: If "AUTO CHANGEOVER" was enabled during installation, refer to "SELECTING AUTO CHANGEOVER" for restrictions on setting heating or cooling setpoint temperatures for proper operation.
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Page 15: Programming With Quickset
Programming with QuickSet™ NOTE: To save valuable programming time, QuickSet™ allows you to set one schedule that is automatically copied to each individual day of the week. You may then go into the program and change any specific day, time setting, or temperature setting to suit your personalized schedule. - Page 16 PROGRAMMING 4. Press SET button. The display will show the setpoint temperature MON TUE WED THU FRI SAT SUN NOTE: Pressing QUICKSET button instead of the SET button will also save your program settings. MORN 5. Press either ∨ or ∧ button to adjust the setpoint temperature for the programmed MORN time.
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Page 17: Review, Change, Or Personalize
SYSTEM 10. Press SYSTEM button for opposite program (HEAT or COOL). 11. Repeat the above steps to enter the temperature settings for the opposite season. NOTE: When programming opposite season, remember that both programs use the same time settings and programmable fan settings. Review, Change, or Personalize Program NOTE: The thermostat will not allow programs to be entered in the HEAT... - Page 18 PROGRAMMING 2. Press SET button. The display will show the current day of the week or the last programmed day. Press ∨ or ∧ to advance to the day of the week you will program. 3. Press SET button. The display will show the time setting: 4.
- Page 19 7 . Press SET button. The display will show AUTO with FAN. MORN 8. Press either ∨ or ∧ button to adjust the fan setting to be in AUTO AUTO FAN (fan controlled by system when required for heating or cooling) or ON (fan remains on continuously) for the individual daily setpoint you are programming.
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Page 20: Review Or Modify Program
PROGRAMMING Review or Modify Program SYSTEM 1. Press SYSTEM button until the word "HEAT" or "COOL" appears on HEAT the right side of the display. This will choose the program you wish to review or modify. M A N U A L AUTO FAN 2. -
Page 21: Energy Efficient Recovery (Eer™)
You may temporarily change the temperature setting at any time without affecting the program, even if the program is running. 1. Press either ∨ or ∧ button to adjust the temperature. 2. The thermostat will automatically return to the program at the next scheduled setting change, or 4 hours, whichever comes first. -
Page 22: Programming Filter Monitor
PROGRAMMING Programming Filter Monitor The filter monitor keeps track of the total time the system fan has been in operation during the heating or cooling modes. The "Check Filter" message appears when the hours of fan operation equals your programmed filter monitor hours setting. 1. -
Page 23: Programming Keypad Lock
Programming Keypad Lock NOTE: In order for the lock function to work as described below, the "LOCK" function must have been enabled during installation. If the Lock function does not seem to work, you must change a dip switch located on the back of the thermostat. -
Page 24: Unlocking Keypad
PROGRAMMING 5. Press SET button to save second digit. The third digit will flash. 6. Press ∨ or ∧ button to enter the third (right) digit. 7 . Press SET button to save third digit. "Lock” appears on the screen and your combination is now saved. LOCK HEAT MANUAL... -
Page 25: Operation
OPERATION The thermostat is now ready to run your saved programs and automatically control the temperature at your programmed time settings. The thermostat will “flash” the word “heat” or “cool” in the main display when the system is active. B B eginning Programmed Operation: NOTE: DO NOT switch system to COOL if outside temperature is below 50˚F. -
Page 26: Resetting The Thermostat
OPERATION You may press the ∨ or ∧ buttons to temporarily change the programmed temperature while in COOL or HEAT mode. The ∨ or ∧ buttons will not change the setting while the system is in AUTO. You may also press the PROG/MAN button to change to manual mode and manually change the temperature settings. -
Page 27: Compressor Protection
Compressor Protection This thermostat is equipped with automatic compressor protection to prevent potential damage due to short cycling or extended power outages. The short cycle protection provides a 5-minute delay between heating and cooling cycles to prevent compressor damage. During extended power outages this thermostat provides an extra margin of compressor protection in the heat mode by delaying the first stage of heating (heat pump) from engaging until the compressor crankcase oil has been warmed. -
Page 28: Selecting Auto Changeover
OPERATION Selecting Auto Changeover 75˚ Lowest cool setting You may wish to set your thermostat so it will automatically choose between the HEAT or COOL programs for proper temperature control. ˚ This program feature is referred to as the AUTO (Auto Changeover) ˚... - Page 29 If your room temperature rises above the COOL setpoint programmed AUTO temperature setting, the thermostat will activate the COOL program. If the COOL temperature continues to increase, the thermostat will turn on the COOL mode and COOL will slowly flash in the display, indicating that it is in operation. When AUTO FAN P R O G R A M the room temperature decreases to meet the COOL program setpoint...
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Page 30: 24V Ac Circuit Power Monitor
OPERATION 24V AC Circuit Power Monitor If you experience a loss of power, this thermostat will indicate “-AC” in the time field of the LCD display. This means that your system’s 24 V AC circuit is not receiving power or is not functioning correctly. -
Page 31: Changing Dip Switch Settings
CHANGING DIP SWITCH SETTINGS Thermostat functions are determined by settings on two sets of dip switches: "SWITCH 1" and "SWITCH 2". These dip switches are pre-set at installation. However, some users may want to change some of the dip switch settings on SWITCH 2 to enable or change certain thermostat options. -
Page 32: Replacing The Back-Up Batteries
OPERATION Changing dip switch settings: TCH 1 1. Use a small screwdriver or pencil to move the switch to the desired setting. 2. Press RESET button. See Figure 5. Pressing RESET will erase any previously entered programming information. NOTE: When changing the settings on “Switch 1” , the RESET button does not have to be pressed for the new configuration to register or operate. - Page 33 Replacing The Back-Up Batteries: CAUTION: Installing batteries backwards can damage thermostat. NOTE: Replace batteries with four “AA” alkaline batteries only. 1. Press SYSTEM button until "OFF" appears in the time field on AUTO FAN SYSTEM the display. 2. Remove thermostat from wiring subbase. (See “REMOVING BATTERY THERMOSTAT FROM SUBBASE”...
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Page 34: Cleaning And Repair
CLEANING AND REPAIR DANGER: ELECTRIC SHOCK HAZARD. Turn off power at the main service panel before cleaning, servicing, or removing thermostat. Use a dry cloth to remove any dust from the thermostat cover. Do not use water or submerge the thermostat in water to clean. -
Page 35: Troubleshooting
TROUBLESHOOTING Symptom Remedy Thermostat does not turn on system. Check wiring. (See “Installation Instructions” included with thermostat.) Check to see if "OFF" is indicated in display. Select HEAT or COOL mode by pressing SYSTEM button. Compressor short cycle protection or power outage safeguards may be in effect. - Page 36 Symptom Remedy Thermostat will not turn on heat pump Compressor power outage safeguards may be in effect. in heat mode. Uses auxiliary stages of (See "COMPRESSOR PROTECTION.") heating to control setpoint. Heat turns on instead of cool and Check wiring and system specifications. vice versa.
- Page 37 Symptom Remedy Thermostat does not follow program. Check AM/PM indicators at time of day and programmed time changes. (See “PROGRAMMING. ” ) Thermostat may be OFF . Select HEAT or COOL mode by pressing SYSTEM button. Program may not have been done in HEAT or COOL modes. (See "PROGRAMMING".) Both HEAT and COOL programs utilize the same setpoint time and programmable fan settings.
- Page 38 Symptom Remedy Room temperature reading is If you have attached remote sensors, the thermostat will display the inaccurate. average temperature of the activated sensors. See "INSTALLATION INSTRUCTIONS" and "CHANGING DIP SWITCH SETTINGS". If there are no remote sensors attached, make sure that the remote sensor dip switch settings on the rear of the thermostat body are turned off and the MAIN thermostat dip switch is turned on.
- Page 39 Symptom Remedy Fan runs continuously for hours at Review programmable fan settings entered during programming. different times of the day (See "PROGRAMMING".) Filter monitor indicates "CHECK FILTER" Check with your filter supplier and modify Filter Monitor settings to match too soon for proper filter servicing interval. your servicing intervals.
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Page 40: Warranty
FIVE YEAR LIMITED WARRANTY Maple Chase Company warrants to the original contractor installer or to the original consumer user, each new Robertshaw thermostat to be free from defects in materials and workmanship under normal use and service for a period of five (5) years from the date of purchase. This warranty does not cover batteries, damage caused by batteries, damage resulting from improper installation, alteration, misuse or abuse of the thermostat occurring after the date of purchase.