Tradepro tp-ks1 Hard Start Kit 3.5-5 Hp 208 230V

Product Description

The TRADEPRO tp-ks1 is a two-wire, pre-assembled hard start kit designed to improve compressor starting torque in single-phase HVAC, refrigeration, and heat pump systems. Rated for 3.5 to 5 HP compressors operating at 208, 230, or 265 volts single phase, this kit uses a mechanical potential relay rather than circuit boards, timers, or PTCR devices. The mechanical relay design reduces failure points and eliminates solid-state components that can degrade over time. Licensed HVAC technicians and refrigeration mechanics install this kit as a compressor starting aid in both new installations and service calls.

The tp-ks1 applies to single-phase air conditioning, refrigeration, and heat pump compressors in the 3.5 to 5 HP range. It is suited for residential and light commercial systems where low voltage conditions, high head pressures, or weak utility power make compressor starting unreliable. The pre-assembled design simplifies field installation, making it a practical solution during service calls where time on-site is limited. It has received product approval from compressor and equipment manufacturers, confirming its fit across a range of single-phase compressor applications.

Key Features

• Two-wire connection — no additional wiring runs or control boards required
• Mechanical potential relay design eliminates circuit boards, timers, and PTCR devices
• Rated for 3.5 to 5 HP single-phase compressors at 208, 230, and 265 volts
• Pre-assembled from the factory for fast field installation
• Assists compressor starting under adverse conditions including low voltage and high head pressure
• Approved by leading compressor and equipment manufacturers

Compatibility

Designed for single-phase air conditioning, refrigeration, and heat pump compressors rated between 3.5 and 5 HP operating at 208, 230, or 265 volts single phase.

Installation Notes

Installation should be performed by a licensed HVAC or refrigeration technician. Disconnect and lock out all power to the unit before beginning work. Connect the two wires from the tp-ks1 to the compressor start and run terminals per the wiring diagram on the kit. Verify voltage and HP ratings match the compressor nameplate before energizing the system.