Here’s a straightforward maintenance schedule for Lennox split air conditioners:

### Monthly:
– **Check Air Filters**: Inspect and clean or replace filters if dirty.
– **Inspect Outdoor Unit**: Remove debris, leaves, and dirt around the unit.

### Quarterly:
– **Check Refrigerant Levels**: Ensure levels are optimal and there are no leaks.
– **Clean the Coils**: Gently clean the evaporator and condenser coils to maintain efficiency.

### Biannually (Spring and Fall):
– **Professional Maintenance**: Schedule a professional inspection to check for refrigerant leaks, electrical connections, and overall system performance.
– **Clean Drain Line**: Flush the condensate drain line to prevent clogging.

### Annually:
– **Inspect Thermostat**: Ensure the thermostat is functioning correctly and consider upgrading to a smart thermostat for better control.
– **Ductwork Inspection**: Check for any leaks or obstructions in the ductwork.

Keeping up with this schedule will help ensure your Lennox split air conditioner operates efficiently throughout its lifespan.

I can’t provide a specific product spec sheet, but I can certainly summarize the typical features and specifications you might find for Lennox split air conditioners based on common knowledge about their product line.

### Lennox Split Air Conditioners Overview

**1. SEER Rating:**
– Lennox offers a range of models with SEER (Seasonal Energy Efficiency Ratio) ratings, typically ranging from 14 to 26, with higher ratings indicating greater energy efficiency.

**2. Cooling Capacity:**
– Cooling capacities generally vary from 1.5 tons to 5 tons, accommodating different room sizes and configurations.

**3. Compressor Type:**
– Many Lennox models utilize advanced variable-speed compressors for enhanced efficiency and quieter operation.

**4. Refrigerant:**
– Most Lennox split systems use R-410A refrigerant, which is more environmentally friendly than older refrigerants like R-22.

**5. Noise Levels:**
– Lennox units are designed to operate quietly, with many models achieving sound levels as low as 50 decibels.

**6. Smart Technology:**
– Many Lennox air conditioners are compatible with the iComfort smart thermostat, allowing for remote monitoring and control via smartphone apps.

**7. Warranty:**
– Lennox typically offers a limited warranty on parts, which can vary by model but often includes a 10-year warranty on the compressor and other key components.

**8. Filters:**
– Lennox systems often include advanced filtration options, including MERV-rated filters that help improve indoor air quality by capturing allergens and dust.

**9. Additional Features:**
– Options for multi-zone systems
– Built-in dehumidification capabilities
– Various energy-saving modes and settings

For specific models and their detailed specifications, it’s best to consult the official Lennox website or a licensed Lennox dealer. They can provide you with the latest product information, including installation requirements and compatibility with other HVAC systems.

Here’s a list of common parts for Lennox Split Air Conditioners along with their typical functions. Note that part numbers can vary based on specific models, so it’s always good to consult the unit’s manual or a Lennox parts catalog for exact part numbers. Here are some common parts:

1. **Compressor** – Essential for refrigerant circulation.
2. **Condenser Coil** – Helps dissipate heat from the refrigerant.
3. **Evaporator Coil** – Absorbs heat from the indoor air.
4. **Capacitor** – Provides the necessary start-up power to the compressor and fan motors.
5. **Fan Motor** – Drives the outdoor and indoor fans.
6. **Thermostat** – Controls the temperature settings for the air conditioning system.
7. **Filter Drier** – Removes moisture and contaminants from the refrigerant.
8. **Expansion Valve** – Regulates the flow of refrigerant into the evaporator.
9. **Blower Motor** – Circulates air through the indoor unit.
10. **Circuit Board** – Controls the electrical components of the AC system.
11. **Reversing Valve** (for heat pump models) – Allows the system to switch between heating and cooling modes.
12. **Drain Pan** – Collects condensation from the evaporator coil.
13. **Insulation** – Used on refrigerant lines to improve efficiency.

For exact part numbers, it’s best to reference the service manual for the specific model you are working on or contact a Lennox distributor directly. If you need help identifying parts for a specific model, feel free to ask!

Troubleshooting a Lennox split air conditioner involves several steps to identify and resolve common issues. Here’s a guide to help you through the process:

### 1. **Check the Thermostat**
– Ensure the thermostat is set to “cool” mode and the desired temperature is lower than the current room temperature.
– Replace the batteries if it’s a battery-operated model.

### 2. **Inspect the Power Supply**
– Check if the unit is receiving power. Verify the circuit breaker hasn’t tripped or a fuse hasn’t blown. Reset the breaker if necessary.
– Ensure the disconnect switch near the outdoor unit is turned on.

### 3. **Examine the Air Filter**
– A clogged air filter can restrict airflow and reduce efficiency. Remove and inspect the filter. Clean or replace it if it’s dirty.

### 4. **Inspect the Condenser and Evaporator Coils**
– Check for dirt buildup on the coils. Clean the outdoor condenser coils with a soft brush or spray with a hose, being careful not to bend the fins.
– If the indoor evaporator coils are dirty, it may require professional cleaning.

### 5. **Look for Blockages**
– Ensure that air vents are open and unobstructed. Remove any furniture or debris that may be blocking airflow.
– Check the outdoor unit for debris, such as leaves or dirt, that may obstruct airflow.

### 6. **Check the Refrigerant Levels**
– If the system is running but not cooling, it may be low on refrigerant. This requires a professional to check and recharge the system.

### 7. **Listen for Unusual Noises**
– If the system is making strange noises (like rattling or grinding), it may indicate a mechanical issue. Identify the source of the noise and address it.

### 8. **Examine the Ductwork**
– Inspect ductwork for leaks or disconnections that may affect cooling performance. Seal any leaks with duct tape or mastic.

### 9. **Test the System Operation**
– After checking the above items, set the thermostat to a lower temperature and observe if the system starts cooling. If there’s still an issue, it may require further technical diagnostics.

### 10. **Consult the Owner’s Manual**
– Refer to the specific owner’s manual for troubleshooting tips, error codes, or manufacturer-specific instructions.

### 11. **Contact a Professional**
– If the problem persists after performing these checks, it’s advisable to contact a certified HVAC technician for a comprehensive inspection and repair.

### Safety Precautions:
– Always turn off the power to the unit before performing any maintenance to avoid electrical shock.
– If you are not comfortable or experienced with HVAC systems, seeking professional help is always the safest choice.

By methodically working through these steps, you should be able to identify and address most common issues with a Lennox split air conditioner.