3-Piece Booster Pump, 115 VAC

Details

Model: 106189
Manufacturer: Bell & Gossett
Product Name: Series 100NFI Three-Piece Booster Pump
Part Number: 1856
Motor Power: 1/12 HP
Electrical Rating: 115 VAC, 1.75 A, 60 Hz
Material: Cast Iron Body with Flanged Connections
Connection Range: 3/4 inch to 1-1/2 inch flanges
Description: Three-piece, field-serviceable hydronic circulator pump designed for closed-loop heating and cooling systems. Provides reliable water circulation in commercial and residential hydronic applications requiring consistent flow and moderate head pressure.

Product Overview

The Bell & Gossett 106189 (Model 100NFI) Series 100 Booster Pump is a high-efficiency, cast-iron circulator designed for hydronic heating and cooling systems. The three-piece design allows for full field reparability, minimizing downtime and service cost. Equipped with Bell & Gossett’s precision-manufactured motor and centrifugal impeller assembly, the pump delivers quiet, vibration-free operation with optimized hydraulic performance. This model features sleeve-type bearings, a dynamically balanced impeller, and a replaceable mechanical seal for long service life. Suitable for systems requiring dependable flow control, the 100NFI supports operation in residential, light commercial, and institutional heating loops.

Technical Specifications

• Manufacturer Part Number: 106189
• Alternate Model Number: 100NFI (Series 100)
• Pump Type: Centrifugal, three-piece booster/circulator
• Horsepower: 1/12 HP
• Motor Type: Bell & Gossett NFI motor, permanently lubricated
• Voltage: 115 VAC, single-phase
• Current Draw: 1.75 amps
• Frequency: 60 Hz
• Rotation Speed: 1725 rpm
• Connection Size: 3/4 inch to 1-1/2 inch flanged
• Flow Range: Up to 33 GPM (depending on system head)
• Head Range: Up to 8 ft (nominal)
• Maximum Operating Pressure: 125 psi
• Maximum Operating Temperature: 225°F (107°C)
• Impeller Type: Bronze centrifugal impeller, dynamically balanced
• Bearing Type: Sleeve bearing (water-lubricated)
• Seal Type: Mechanical seal, replaceable without disturbing piping
• Body Material: Cast iron
• Motor Enclosure: Open, drip-proof
• Mounting Configuration: Horizontal, foot-mounted motor housing
• Overall Dimensions: 14-7/8 inch Length × 6-3/8 inch Height
• Serviceability: Three-part construction for complete field maintenance
• Applications: Hydronic heating loops, fan coils, radiant panels, and closed-loop chillers
• Compliance: UL and CSA listed, ASHRAE 90.1 compliant
• Country of Manufacture: USA

Installation Notes

• Install pump on the return or supply side of closed-loop hydronic systems as specified by design requirements.
• Ensure proper alignment between motor, coupler, and bearing assembly during installation.
• Mount horizontally with motor shaft in a horizontal position for optimal bearing lubrication.
• Flanged connections should be properly gasketed and torqued to manufacturer recommendations.
• Fill system and vent air before startup to prevent cavitation and bearing damage.
• Verify proper rotation direction prior to commissioning; correct if necessary.
• Perform periodic lubrication and inspection per Bell & Gossett maintenance guidelines.

Summary

The Bell & Gossett 106189 Series 100NFI Booster Pump is a robust, three-piece cast-iron circulator built for professional hydronic system applications. Offering 1/12 HP power, field-serviceable construction, and Bell & Gossett’s precision motor design, it ensures efficient, quiet, and reliable operation across a range of commercial and residential heating or cooling systems requiring consistent flow performance and long-term durability.