Lochinvar L100304109 Flange Pump Assembly 1 Inch

Product Description

The LOCHINVAR L100304109 is a 1-inch flange pump assembly with 0-10 VDC variable-speed control, designed for use in hydronic heating systems. This assembly manages circulating fluid flow and responds to a 0-10 volt DC signal to modulate pump output, allowing the system to match flow to actual heating demand. Licensed hydronic or plumbing technicians typically handle installation and commissioning. The flanged connection simplifies field removal and reinstallation without cutting pipe, making it a practical choice for service and replacement work in commercial and residential boiler applications.

This pump assembly is suited for closed-loop hydronic systems where variable flow control is required. The 0-10 VDC input signal interface is common in building automation and boiler control environments, allowing the pump to be staged or modulated by a system controller. It is a direct-fit replacement assembly intended for LOCHINVAR boiler systems requiring a 1-inch flange-connected circulator with variable-speed capability.

Key Features

• 1-inch flange connection for secure, leak-resistant pipe interface
• 0-10 VDC control signal input for variable-speed modulation
• Flange-mount design allows pump removal without cutting system piping
• OEM-specification replacement assembly for LOCHINVAR hydronic systems
• Supports demand-based flow control to improve system efficiency

Compatibility

Designed as an OEM-style replacement flange pump assembly for LOCHINVAR hydronic boiler systems requiring a 1-inch flanged circulator with 0-10 VDC variable-speed control input.

Installation Notes

Installation should be performed by a licensed plumber or hydronic heating technician familiar with closed-loop hydronic systems. Shut down and de-energize the boiler system and allow fluid to cool before removing the existing pump assembly. Verify flange bolt pattern and gasket seating before torquing connections, and confirm the 0-10 VDC control wiring is correctly terminated per the system controller documentation. Follow all applicable local mechanical and plumbing codes during installation.

Technical Specifications

• Connection Size: 1 inch
• Connection Type: Flange
• Control Signal: 0-10 VDC

Standard Information

• Brand: LOCHINVAR
• Manufacturer Part Number: L100304109