LENNOX M0STAT120L-1 Indoor Wired Non-Programmable Controller Installation Guide
- June 12, 2024
- Lennox
Table of Contents
LENNOX M0STAT120L-1 Indoor Wired Non-Programmable Controller Installation Guide
CAUTION
As with any mechanical equipment, contact with sharp sheet metal edges can
result in personal injury. Take care while handling this equipment and wear
gloves and protective clothing.
General
The M0STAT120L-1 is a wired non-programmable local controller for mini-split indoor units with convenient timed schedules for daily operation.
These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation.
Requirements
Be sure that power supply to the indoor unit has been disconnected before beginning installation.
This controller should be used only as described in this manual.
Do not install the controller on outside walls (where there is unconditioned space on opposite side of wall) or in locations where direct sunlight may be present.
Shipping and Packing List
Package 1 of 1 contains the following:
Product Overview
- Built-In Memory – Maintains clock, fan speed and mode of operation settings following power outages.
- Dimensions – (H x W x D) – 4-3/4 x 4-3/4 x 7/8 inches (83 x 83 x 22 mm).
- LCD Display – 3-1/2 inch (89 mm) backlit.
- Wiring Requirements – Controller uses 5-wire shielded 20 foot (6 meters) extension cable (furnished) for easy low voltage connection to the indoor unit.
- Cable Length – Total overall cable length not to exceed 59 feet (18 meters).
Product Dimensions
Back Plate Removal
1. Insert a flat-head screwdriver into the slot located in the lower section of the back plate.
2. Rotate the screwdriver to remove the back plate.
IMPORTANT
The printed circuit board (PCB) is located in the upper section of the remote
control. Be careful not to damage the PCB with the screwdriver.
3. Remove the back plate.
Installing Back Plate on Drywall
When installing the back plate to a flat drywall surface, use the provided screws for securing back plate to drywall (M4x20). Also use provided wall anchors if required.
IMPORTANT
Always install back plate on flat surface. Do not distort back plate by over-
tightening the mounting screws.
Making Connections
Wiring Diagram
Refer to the following to illustrations on connecting the provided cables to the wired controller and indoor unit.
Cable Connection Illustration
- Connect the 5-pin shielded cable assembly to connection on the wired controller.
- Connect the 5-pin shielded cable assembly to the 5-pin shielded extension cable.
- Connect the 5-pin shielded extension cable to the indoor unit display cable connection.
NOTE: Use the provided M4x8 screw with washer to secure the ground connector.
Reattached the Top Panel
User Information
1. FAN SPEED Button
Selects fan speed. Each button press cycles through the following settings on
display.
2. MODE Button
Select system operation modes. Push button to cycle through each setting.
3. FUNCTION Button
Scrolls through unit operations in this order:
4. SWING Button
- a. Up-Down Swing – Press the Swing button to start up and down swing.
- b. Left-Right Swing – Press the Swing button for two seconds to start left and right swing. Press it again for two seconds to stop the swing.
- c. Can also set the desired air direction of the louver.
5. TIMER Button
- a. TIMER ON (initiates an auto-on time sequence).
- b. TIMER OFF (initiates an auto-off time sequence) can be used separately or together.
- c. Each press of the button increases the time in 30 minute increments up to 10 hours.
- d. Above 10 hours each press of the button will increase the auto-timed setting by 60 minutes up to 24 hours.
6. POWER Button
Turns system on and off.
7. CONFIRM Button
Confirms selected function.
8. BACK Button
Returns to the previous step.
9. UP/DOWN Buttons
-
a. Increase or decrease the indoor temperature in two degree increments with a maximum 86°F (30°C) and minimum 60°F (16°C).
NOTE : Temperature cannot be adjusted in FAN mode.’ -
b. Fahrenheit and Celsius Setting – Hold the button UP or DOWN for three seconds to alternate the temperature display between the ºF and ºC scale.
10. Lock Button
Press the Function and Swing buttons simultaneously for three seconds to lock
the controller to prevent tampering with settings. To unlock the controller
press both buttons again for three seconds.
Display Indicators
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