This kit is primarily designed for York YK and YT centrifugal chiller lines

Replaces legacy part number 1309K0001 for easy inventory cross-referencing

and S1-2702-331P

while the version with the "00" suffix is often used in internal logistics or bulk packaging

Bard HVAC 8403-090 Thermostat Refrigerant This kit is primarily designedThe Bard 8403 090 is a heavy duty, 24V programmable thermostat engineered specifically for multi stage HVAC systems. As a 3HT 2CL T6 Pro model, it provides precise control for up to three stages of heating and two stages of cooling, making it essential for complex wall mount heat pump and air conditioner setups. This unit serves as the direct replacement for 8403 058 and 8403 059, ensuring a seamless retrofit without the need for extensive wiring