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The DIAL 7487 is a 2-speed long shaft knob kit designed for evaporative coolers. It provides a complete control solution for switching between motor speeds and managing pump operation. The kit includes a control knob, a 6-position switch, labeled inserts showing motor and pump operation modes, a plain insert with a pointer line, and installation instructions. This hardware is used by HVAC technicians and service pros to restore or replace damaged or missing control assemblies on residential and light-commercial evaporative coolers.
This knob kit fits evaporative cooler installations where a long-shaft control is required for 2-speed operation. It is well-suited for wall-mounted or unit-mounted control configurations. The labeled inserts simplify setup by providing clear visual references for motor speed and pump status, making it appropriate for both initial installs and replacement service calls.
Designed as an OEM-style replacement control knob kit for 2-speed residential and light-commercial evaporative coolers requiring a long shaft configuration.
Installation is typically performed by an HVAC technician or qualified service professional. Disconnect power to the evaporative cooler at the disconnect switch or breaker before beginning any control replacement work. Verify shaft length and switch orientation match the existing housing before mounting. Follow the included instructions and consult local mechanical codes as applicable.
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