Repair and Reconditioning of Extract Pressurization Fan Motor and Control Panel

Break Down Posted On: June 22, 2026 Closing On: June 26, 2026

JOB REFERENCE: JB

Background

• The Extract Pressurization Fan is a critical part of the building's life safety and ventilation system, designed to extract smoke and maintain positive pressure in designated areas during emergencies.
• The fan operates through an electric motor connected to a control panel equipped with protective devices including relays, contactors, and fuses.
• During a routine preventive maintenance inspection, the fan was found to be non‑operational, prompting a detailed investigation into the cause of the failure.
• Testing confirmed that the motor (CMENS 3 Phase 15HP 11KW Extract Fan Motor #1 13.3Amp, Model E ) had developed an internal winding failure.
• The resulting winding burnout caused excessive current draw, which damaged the control relay ...