Lennox M0STAT64Q-2

1
INSTALLATION/
OPERATION
INSTRUCTIONS
CONTROLS
507644-03 10/2021
Supersedes 507644-02
This manual must be left with the
owner for future reference.
M0STAT64Q-2 Indoor Unit
Programmable Controller
(22U20)
©2021 Lennox Industries Inc.
Dallas, Texas, USA
IMPORTANT
Frequent changes to operating mode may
cause system malfunction. Allow at least
one minute between mode changes to
allow the system to stabilize.
WARNING
Improper installation, adjustment,
alteration, service or maintenance can
cause property damage, personal injury or
loss of life.
Installation and service must be performed
by a licensed professional HVAC installer
(or equivalent) or service agency.
Shipping and Packing List
Package 1 of 1 catalog number 22U20 contains:
1 – Wired Controller
1 – Lithium battery
3 – Screws (mount to wall)
2 – Screws (mount to J-box)
2 – Plastic spacers (J-box)
1 – Connection Cable A with connector for all indoor
units
1 – Connection Cable B with connector for MMDA/B,
MCFA/B, M22A and M33A/B/C indoor units
1 – Connection Cable C with connector for MWMA/B
indoor units
1 – Connection Cable D for MWMC indoor unit
1 – Installation and operation manual
Specications
Input voltage 5 VDC
Ambient temperature 23~110°F (-5~43°C)
Ambient humidity RH40%~RH90%

Lennox M0STAT64Q-2 Specifications

General

Product Type	Thermostat
Power Source	24 VAC
Type	Digital
Display	LCD
Control	Touchscreen
Programmability	Programmable

Summary

Setup

Set the Current Day and Time

Instructions to set the current day and time using the Timer button and +/- buttons.

Select Fahrenheit or Celsius for display

How to toggle between Fahrenheit and Celsius display modes using Back/Turbo and Copy/Follow me buttons.

Set Room Temperature Sensor Location

How to select room temperature sensing between indoor unit or controller using the Copy/Follow me button.

Key Pad Tone (beep)

Instructions to turn on/off the key pad tone using Swing and Timer buttons simultaneously.

Operation

StartStop Operation

How to start or stop the unit's operation by pressing the Power button.

Set the Operation Mode

How to select operation modes like Auto, Cool, Dry, Heat, or Fan using the Mode and +/- buttons.

Set the Set Point

How to adjust the desired temperature set point using the +/- buttons.

Set the Fan Speed

Instructions to adjust fan speed settings (Auto, Low, Med, High) using the Fan Speed button.

Set Child Lock Function

How to lock or unlock all controller buttons by pressing the Fan Speed button for 3 seconds.

Turn ONOFF Turbo Function

How to activate or deactivate Turbo mode for high fan speed using the Back/Turbo button.

Set Swing Function

How to adjust louver direction and oscillation using the Swing button, including independent louver control for cassette units.

Timer and Schedules

Setup Timed Operation Start Time

Steps to set the start time for timed operation using the Timer and Confirm buttons.

Setup Timed Operation Stop Time

Steps to set the stop time for timed operation using the Timer and Confirm buttons.

Setup Timed Operation Start and Stop Time

Steps to set both start and stop times for timed operation using Timer, Confirm, and +/- buttons.

Create Schedules (up to 8 events per day)

Instructions to initiate the creation of daily schedules with up to 8 events using Timer and Confirm buttons.

Create and Setup Scheduled Events (up to 8 events per day)

Detailed steps to create and configure individual scheduled events, including time, mode, set point, and fan speed.

Copy a Schedule to a New Day

How to copy an existing daily schedule to another day using Timer, Confirm, and Copy/Follow Me buttons.

Activate and Deactivate Timed Operation

How to enable or disable the timed operation feature using the Timer and Power buttons.

Setup Days Off

How to set specific days when the unit will not operate, using Timer, Confirm, and Day Off/Del buttons.

Edit a Scheduled Event

Steps to modify an existing scheduled event's time, mode, set point, or fan speed.

Delete an Event from a Scheduled Day

Instructions to remove a specific event from a scheduled day using Timer, Confirm, and Day Off/Del buttons.