Armstrong 116503-136A H-66-3 Cast Iron Pump 3/4HP 1PH

Run larger commercial HVAC circuits with Armstrong 116503-136A H-66-3, a Series 1060 cast-iron pump listed in the supplied specifications with a 1.5 HP three-phase motor. The 2-inch flanged connection, 1725 RPM speed, and 225°F maximum operating temperature suit high-flow cooling loops and large commercial boilers. The product title shows different horsepower and phase information, so verify the nameplate before purchase.

The supplied specifications identify 208–230/460 V three-phase power, a maintenance-free Sealed Bearing Assembly, and an alloy-steel shaft with bronze sleeve. The cast-iron body forms the pump casing, while the 2-inch flange provides the piping reference. Flow, head, amp draw, dimensions, and weight were not supplied, so resolve the title-versus-specification discrepancy before wiring or selecting the pump from a system curve.

Key Features & Benefits

- 1.5 HP High-Torque Configuration: Supports larger commercial HVAC and boiler-loop circulation as listed in the specifications.
- Three-Phase Motor: Accepts 208–230/460 V service for compatible commercial electrical systems.
- 1725 RPM Speed: Provides a clear motor reference for accurate replacement matching.
- 2-Inch Flanged Connection: Helps contractors verify piping compatibility before installation.
- Cast-Iron Body: Provides the specified casing material for fixed commercial heating and cooling systems.
- Sealed Bearing Assembly: Supports the rotating assembly without routine bearing oiling.
- 225°F Maximum Temperature: Establishes a defined operating limit for compatible heating applications.
- Title Data Requires Verification: Helps prevent an electrical or horsepower mismatch before installation.

Why Choose Armstrong 116503-136A H-66-3

The H-66-3 offers a larger Series 1060 configuration for commercial loops, but the listed horsepower and phase must be confirmed because the product title and supplied specification do not agree.

- Build: Cast iron, sealed bearing assembly, alloy-steel shaft, and bronze sleeve provide identified construction details.
- Value: Resolving the nameplate discrepancy before purchase can prevent incorrect wiring, control selection, and replacement labor.
- Audience: Intended for industrial HVAC contractors, boiler technicians, facility engineers, and commercial maintenance teams.

Applications & Use Cases

Apply Armstrong 116503-136A H-66-3 to industrial HVAC loops, high-flow cooling circuits, and large commercial boiler systems after confirming the motor data. The supplied information identifies a 2-inch flange but does not provide overall dimensions, unit weight, or port reach, so verify flange spacing, pipe support, motor clearance, and electrical access before installation.

Warranty & Support

- Warranty Terms Require Confirmation: Verify duration, coverage, registration, exclusions, and authorized service requirements with Armstrong or the seller.
- Request written confirmation of the horsepower, phase, voltage, and H-66-3 model before ordering.

Do not energize the pump until the motor nameplate, phase, voltage, and horsepower are confirmed. Fill and purge the loop, inspect the flange and seal areas, then monitor vibration, temperature, and operating conditions during commissioning. Purchase the Armstrong 116503-136A H-66-3 Series 1060 cast-iron HVAC pump through Mulmotor.com for authentic equipment, applicable warranty support, and model-verification assistance.