allowing for a modern hardware upgrade without requiring structural changes to your existing RS-485 serial protocol bus

this valve repair kit helps maintain tight shut-off and consistent flow regulation in demanding environments

High-Temperature Protection: Triggers a shut-down at 240°F to prevent heat exchanger overheating

Broad Compatibility: Supports various equipment lines including Lennox gas furnaces

Carrier HN53TB031 Auxiliary Contact Switch 323269-701 allowing for a modern hardwareThe Carrier HN53TB031 Auxiliary Contact Switch is a critical field installable component designed for seamless integration with Carrier 30XA and 30XV chillers. This DPST (Double Pole Single Throw) switch provides reliable secondary signaling for HVAC control circuits, ensuring the automation system receives accurate feedback on contactor status. Engineered for high cycle industrial applications, the HN53TB031 mounts directly to the main power