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Daikin McQuay 668811101 Operation & Application Manual

Programmable electronic thermostat
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For replacement parts call 1-800-377-2787
©2008 McQuay International • www.mcquay.com • 800-432-1342
Programmable Electronic Thermostat
7-Day Programmable, Auto Changeover, Fan Speed Control, Hardwire
Part No.668811101
For replacement parts call 1-800-377-2787
©2008 McQuay International • www.mcquay.com • 800-432-1342
All manuals and user guides at all-guides.com
Installation,
• 7-Day Programmable
• Single Stage Heat Pump/Non-Heat Pump Systems
• Backlit Display
• Single Stage Heat/Cool Systems
• Two Speed Fan Control
• Field Calibration
• Auto Changeover
• Button Lockout Function
• SimpleSet™ Programming
• Remote Temperature Sensor Capability
• Title 24 Compliant / No Batteries Required
• Relay Outputs (minimum voltage drop in thermostat)
• Ideally Suited for:
– Residential (New Construction/Replacement)
– Light Commercial
Operation & Application Guide
LIAF015 / Version A: 03-23-09
LIAF015
Group: WSHP
Supercedes: N/A
Date: 03-23-09

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Summary of Contents for Daikin McQuay 668811101

  • Page 1 All manuals and user guides at all-guides.com For replacement parts call 1-800-377-2787 LIAF015 / Version A: 03-23-09 ©2008 McQuay International • www.mcquay.com • 800-432-1342 Installation, Operation & Application Guide LIAF015 Group: WSHP Supercedes: N/A Date: 03-23-09 Programmable Electronic Thermostat 7-Day Programmable, Auto Changeover, Fan Speed Control, Hardwire Part No.668811101 •...

  • Page 2: Table Of Contents

    All manuals and user guides at all-guides.com Table of Contents Specifications ............................1 Important Safety Information ......................... 1 Package Contents/Tools Required ......................1 To Remove Existing Thermostat ......................2 To Install Thermostat ..........................2 Remote Sensor Installation (Optional) ....................3 Wiring Diagram ............................

  • Page 3: Specifications

    • Use this thermostat only as described in this manual Package Contents/Tools Required Package includes: McQuay 668811101 programmable thermostat and Operation and Application Guide. To Remove Existing Thermostat WARNING ELECTRICAL SHOCK HAZARD – Turn off power at the main service panel by removing the fuse or switching the appropriate circuit breaker to the OFF position before removing the existing thermostat.

  • Page 4: To Remove Existing Thermostat

    • Use this thermostat only as described in this manual Package Contents/Tools Required Package includes: McQuay 668811101 programmable thermostat and Operation and Application Guide. To Remove Existing Thermostat WARNING ELECTRICAL SHOCK HAZARD – Turn off power at the main service panel by removing the fuse or switching the appropriate circuit breaker to the OFF position before removing the existing thermostat.

  • Page 5: Remote Sensor Installation (Optional)

    IMPORTANT: Thermostat installation must conform to local and national building and electrical codes and ordinances. All manuals and user guides at all-guides.com 1. Turn off power to the heating and cooling system by removing the fuse or switching the appropriate circuit breaker off.

  • Page 6: Wiring Diagram

    6-Wire, Configuration Mode The configuration mode is used to set the McQuay 668811101 thermostat to match your heating/cooling system. The McQuay 668811101 thermostat functions with heat pump, air conditioning, gas, oil or electric heat systems. 1. To enter the configuration mode, simultaneously hold down the buttons while the McQuay 668811101 thermostat is in OFF mode.
  • Page 7 All manuals and user guides at all-guides.com Configuration Mode The configuration mode is used to set the McQuay 668811101 thermostat to match your heating/cooling system. The McQuay 668811101 thermostat functions with heat pump, air conditioning, gas, oil or electric heat systems.
  • Page 8 temperature and your “setpoint” temperature. Press the button to set differential value. All manuals and user guides at all-guides.com Press the PROG button to advance to the next screen. 3. Deadband (1°F - 9°F) (1°C - 5°C) – Set the minimum number of degrees between your heating system activation and your cooling system activation.

  • Page 9: Starting The Thermostat

    All manuals and user guides at all-guides.com 8. Room temperature offset (+9°F to - 9°F) (+5°C to -5°C). Adjust to calibrate displayed room temperature to match actual room temperature. Press the PROG button to advance to the next screen. 9. Maximum compressor cycles allowed per hour (d, 2-6). –...

  • Page 10: Mode Of Operation

    The thermostat activates the heating appliance when the room temperature is below the set heat temperature (by the differential temperature) and the red indicator light on the thermostat will light. The McQuay 668811101 thermostat will stop outputting and the red light will turn off when the call for heat has been satisfied. With heat pumps, the thermostat will not let the compressor come on for 4 minutes after it turns off.
  • Page 11 668811101 thermostat thermostat into a 2 hour temporary hold. After 2 hours, it will automatically return to the program schedule. The McQuay 668811101 thermostat also has a button lockout feature. This enables the thermostat to be set to the proper mode and temperature and locked so it cannot be tampered with.

  • Page 12: Operating Modes

    All manuals and user guides at all-guides.com Operating Modes There are six possible operating modes for the McQuay 668811101 thermostat. Off, Cool, Heat, and Cool & Heat modes are accessed by pressing the Mode button. Program mode is accessed by pressing the Prog button. Continuous fan mode is accessed by setting the auto/on switch to ON.

  • Page 13: Programming

    Each period will have a start time, heat temperature, and cool temperature. The McQuay 668811101 thermostat monitors the day and time, while maintaining the specific conditions you have chosen for each period in your program.
  • Page 14 Each period will have a start time, heat temperature, and cool temperature. The McQuay 668811101 thermostat monitors the day and time, while maintaining the specific conditions you have chosen for each period in your program.

  • Page 15: Simpleset® Programming

    All manuals and user guides at all-guides.com • Set time is displayed 8. Press the button to change set time. 9. Press the PROG button to advance to the next screen. Note: Transitions required after 11:59 PM must be programmed in the next day’s MORN transition.

  • Page 16: Lockout Function

    3. Press and hold the PROG button for 5 seconds to exit program mode and return to the OFF mode. Lockout Function The McQuay 668811101 thermostat thermostat has a button lockout feature so the settings cannot be changed or tampered with. With the lockout activated, any button press will result in “LOC” being displayed.

  • Page 17: Personal Program Schedule

    2. Also press the PROG button and keep both depressed for 10 seconds. 3. LOC will display and all buttons will be disabled. To deactivate the LOC feature, repeat steps 1 & 2 above. Factory Preprogramming The McQuay 668811101 thermostat comes preprogrammed with the following schedule: MORN 6:00 AM 8:00 AM...

  • Page 18: Troubleshooting

    All manuals and user guides at all-guides.com THURSDAY MORN NITE HEAT HEAT HEAT HEAT COOL COOL COOL COOL FRIDAY MORN NITE HEAT HEAT HEAT HEAT COOL COOL COOL COOL SATURDAY MORN NITE HEAT HEAT HEAT HEAT COOL COOL COOL COOL SUNDAY MORN NITE...
  • Page 19 All manuals and user guides at all-guides.com Troubleshooting Symptom Remedy No display Check for 24 VAC at thermostat; display is blank when 24 VAC is not present System fan does not come on properly Verify wiring is correct All thermostat buttons are inoperative Verify 24 VAC is present;...
  • Page 20 Lockout Function ..........................14 Factory Preprogramming ........................15 All manuals and user guides at all-guides.com Personal Program Schedule ........................ 15 Troubleshooting ........................... 17 McQuay Training and Development Now that you have made an investment in modern, efficient McQuay equipment, its care should be a high priority. For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or call 540-248-9646 and ask for the Training Department.

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