1. Introduction
Thank you for choosing the TOSOT 15,000 BTU PTAC Inverter Air Conditioner with Heat Pump and Electric Heater. This unit is designed to provide efficient and reliable heating and cooling for spaces up to 850 sq. ft. This manual provides essential information for safe installation, operation, and maintenance of your new appliance. Please read it thoroughly before use and retain it for future reference.
2. Safety Information
WARNING: To reduce the risk of fire, electric shock, or injury, always follow basic precautions, including the following:
- Read all instructions before using this appliance.
- Ensure the unit is properly grounded.
- Do not operate the unit with a damaged cord or plug.
- Do not insert fingers or objects into the air inlet/outlet.
- Disconnect power before cleaning or servicing.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
3. Product Overview
The TOSOT PTAC unit offers versatile climate control with its 4-in-1 functionality: Cooling, Heating (Heat Pump & Electric Auxiliary), Dehumidification, and Fan-only operation. It features inverter technology for precise temperature control and energy efficiency, and is designed for quiet operation.
Key Features:
- All-Season Comfort: 15,000 BTU cooling and 13,500 BTU heating capacity for up to 850 sq. ft.
- Dual Heating Options: Efficient heat pump and 3.5kW electric auxiliary heater for varied climates.
- Energy Saving: Inverter technology, EER of 10.7, COP of 11.6, and R32 refrigerant.
- Standard Size & Easy Fit: Includes wall sleeve (42” x 16” x 13 ¾”) and grill.
- Harsh Condition Ready: Operates from 20℉ to 115℉ with coated outdoor coils and freeze protection.
- Quiet Operation: Runs at a quiet 53dB on high fan speed.
- Ventilation Function: Adjustable lever for indoor-outdoor air exchange.
- Power Supply: 230V 20A LCDI plug, 208/230V, 60Hz, single-phase. Compatible with 24V wall thermostats (not included).

Figure 3.1: The TOSOT PTAC unit highlighting Inverter Technology for precise temperature control and quieter performance, as shown by the temperature fluctuation graph.

Figure 3.2: Energy-efficient PTAC unit featuring R32 Refrigerant, an EER of 10.7, and a COP of 11.6.

Figure 3.3: Illustration of the two heating options: Heat Pump for energy-efficient heating and Electric Auxiliary Heating for faster heating.

Figure 3.4: The 4-in-1 unit providing 4-season comfort with Cooling, Heating, Dry (Dehumidification), and Fan functions.

Figure 3.5: The PTAC unit is designed to work across harsh conditions, cooling efficiently at 115°F and heating effectively at 20°F.

Figure 3.6: The Ventilation Function facilitates continuous exchange of indoor and outdoor air for improved air quality.

Figure 3.7: The standard 230V 20A LCDI plug for the TOSOT PTAC unit. Always verify plug fitment before purchase.

Figure 3.8: The unit features washable filters. Regular cleaning is advised for optimal performance.
4. Setup & Installation
The TOSOT PTAC unit comes with a standard wall sleeve and grill for seamless installation. Proper installation is crucial for optimal performance and safety. It is recommended to have a qualified technician perform the installation.
Wall Sleeve and Grill Assembly:
The following video demonstrates the assembly process for a PTAC sleeve and grill, which is similar to the installation of your TOSOT unit. Please refer to the specific instructions included with your product for detailed steps.
Video 4.1: This video provides a visual guide on how to assemble a PTAC sleeve and grille. It covers unboxing components, securing side panels, attaching the top panel, installing an optional drain kit, and attaching the grille. This process is essential for preparing the unit for wall installation.
Electrical Requirements:
The unit requires a 230V 20A LCDI plug and operates on a 208/230V, 60Hz, single-phase power supply. Ensure your electrical system meets these requirements. Consult a licensed electrician if necessary.

Figure 4.2: Components for PTAC unit installation, including the wall sleeve, exterior grill, and accompanying instruction manuals for both the unit and the wall sleeve.
5. Operating Instructions
Your TOSOT PTAC unit can be controlled via its integrated control panel, a remote control, or a compatible 24V wall thermostat (not included). Familiarize yourself with the control panel layout and functions.
Control Panel Display:

Figure 5.1: Detailed view of the PTAC unit's control panel, showing indicators for fan speed (High, Med, Low, Auto), current room temperature, set temperature, and operating modes (Cool, Heat, Dry, Fan).
Operating Modes:
- Cool Mode: Provides cooling to maintain your desired temperature.
- Heat Mode: Utilizes the heat pump or electric auxiliary heater to warm the space. Select heating method via dip switch during installation.
- Dry Mode (Dehumidifier): Reduces humidity in the room.
- Fan Mode: Circulates air without heating or cooling.
Temperature and Fan Speed Adjustment:
Use the '+' and '-' buttons on the control panel or remote to adjust the desired temperature. The fan speed can be set to High, Medium, Low, or Auto depending on your comfort needs.
Ventilation Function:
An adjustable lever allows for indoor-outdoor air exchange. Note that using this feature may affect cooling and heating efficiency.
Quiet Operation:
The inverter technology ensures quiet operation, with noise levels around 53dB on high fan speed, promoting a serene environment.

Figure 5.2: The TOSOT PTAC unit operates quietly at 53dB on high fan speed, comparable to a library (40dB) and quieter than a typical conversation (50dB).
6. Maintenance
Regular maintenance ensures the longevity and efficiency of your PTAC unit.
- Filter Cleaning: The unit is equipped with washable filters. Clean them regularly to maintain optimal airflow and air quality. Refer to your product manual for specific cleaning instructions.
- Coil Cleaning: Periodically inspect and clean the outdoor coils to prevent debris buildup, which can hinder performance.
- General Cleaning: Wipe down the exterior of the unit with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
7. Troubleshooting
If you experience issues with your TOSOT PTAC unit, refer to the following common troubleshooting steps. For more complex problems, contact customer support.
- Unit not turning on: Check power connection, circuit breaker, and ensure the LCDI plug is reset if tripped.
- Insufficient cooling/heating: Verify correct mode and temperature settings. Check if air filters are clean and not obstructed. Ensure no blockages in air intake or exhaust.
- Unusual noise: Check for loose parts or foreign objects in the unit.
- Water leakage: Ensure the unit is properly leveled and the drain pipe (if installed) is clear and correctly positioned.
8. Specifications
| Feature | Detail |
|---|---|
| Brand Name | TOSOT |
| Model Info | PTAC |
| Product Dimensions | 42.1 x 21.5 x 16 inches |
| Item Model Number | PTAC |
| Efficiency (EER) | 10.7 |
| Capacity (Cooling) | 15,000 BTU |
| Capacity (Heating) | 13,500 BTU |
| Noise Level | 53 Decibels |
| Installation Type | Split System |
| Form Factor | Packaged Unit |
| Special Features | Dehumidifier, Fast Cooling, Heating And Cooling Function, Inverter Compressor |
| Heating Elements | 1 (3.5kW Electric Auxiliary) |
| Color | White |
| Voltage | 230 Volts |
| Wattage | 1160 watts |
| Material Type | Metal |
| Floor Area Coverage | 850 Square Feet |
| Seasonal Energy Efficiency Ratio (SEER) | 14 |
| Refrigerant | R-32 |
9. Warranty & Support
Your TOSOT PTAC unit comes with a 5-year warranty from the date of purchase. For warranty claims, technical support, or any questions regarding your product, please refer to the contact information provided in your product packaging or visit the official TOSOT website.





