User Manual for Temptress 12V DC Air Conditioner Kit

Quick guide from the manual

This manual provides instructions for installing and operating the Temptress 12V DC Air Conditioner Kit, suitable for boats, RVs, and off-grid cabins. The system is designed to be battery-powered and requires specific plumbing and electrical connections. Key steps include preparing the air handler, installing the condenser (marine or air-cooled), connecting the refrigeration lines, wiring the compressor control board, and charging the system with R-134a refrigerant.

System Overview

The system consists of two main components connected by refrigeration tubing:

• Compressor sled: Includes the compressor, condenser, and control circuitry.
• Air handler: Contains the air blower, evaporator, expansion valve, and condensation collection assembly.

The kit includes the compressor, control board, thermal cut-off switch, potentiometer, condenser (seawater or air-cooled), filter/dryer, air handler, fan speed controller, thermostat/humidistat, 24V relay, and voltage converter (for 12V models).

Installation

The installation process varies slightly depending on whether you are using a marine (water-cooled) or RV/Tiny Home (air-cooled) setup.

Air Handler Preparation

The air handler requires an upgrade to the fan speed control system. Remove the existing temperature and speed controllers and the resistor pack. Connect the fan motor wires directly to the new speed controller.

Expansion Valve Replacement

The kit includes an upgraded expansion valve. Ensure the valve is installed vertically. Secure the temperature bulb in the exact location of the original and wrap it with the supplied insulating tape.

Condenser Installation

For RV/Tiny Home versions, prepare the air-cooled condenser by drilling pilot holes and installing the rubber gasket and fan adapter plate. Ensure the seal is airtight.

Plumbing

The refrigeration circuit consists of a high-pressure side and a low-pressure side.

• High-pressure side: Runs from the compressor output to the condenser, through the filter/dryer, and to the expansion valve side of the air handler.
• Low-pressure side: Returns low-pressure gas from the air handler to the compressor vacuum return port.

Use opposing wrenches when tightening flare nuts to avoid damaging the fittings. Ensure all copper tubing is flared correctly.

Wiring

The system requires careful wiring of the compressor control board, relay, and thermostat.

• Voltage Converter: Used for 12V applications to provide 24V power to the control board.
• Compressor Control: Connect the three-phase plug to the compressor. Match wire colors (Black, Red, White) to the pins on the control board.
• Relay: Connect the 24V relay to activate the water pump and air handler fan.
• Potentiometer: Used to adjust compressor speed. Wire to SPD, GND, and +5V terminals on the control board.

Charging

The system must be evacuated and charged with R-134a refrigerant.

1. Vacuuming: Connect a vacuum pump to the high and low-pressure ports. Run until pressure is below -30 inches Hg for at least 30 minutes.
2. Charging: Use the SuperCool app to guide the charging process. Monitor the high-pressure gauge and the temperature of the copper tube leaving the compressor. Aim for a subcool target of 10 degrees F.

Operation

The thermostat controls the air conditioner based on temperature and humidity settings. The top button sets the turn-on threshold, and the bottom button sets the turn-off threshold. Ensure the turn-on setting is higher than the turn-off setting for cooling mode (indicated by 'C' on the display). For dehumidification mode, the display will show 'd'.