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Mechanical Control SA3-ZHB10 3-Knob switch Horizontal-Knob switch

3-Knob Variable-Speed Mechanical Control

Reliable Control Over Basic Air Conditioner Functions

Electro-mechanical rotary-knob switch assemblies provide conventional control over basic air conditioning functions. Both 115V and 230V switches are available. The standard design is an aluminum plate covered with a modern black plastic overlay with text and graphical representations of the various functions. Many different configurations are available:

Standard three-knob assemblies provide function selection (OFF-FAN-RUN), fan speed control, and a room thermostat with 10 ft. (3 m) capillary tube. For chilled water systems, a special thermostat on the air handler allows automatic changeover between heating and cooling modes.

Switches are also available for use with auxiliary heat modules, but an HRX type heat relay may be needed in certain cases.

763100075 SA3-ZHB10, 3-Knob Switch, Horizontal, Black, 10′ Cap Tube,  115V
763100068 SA3-ZHCB10, 3-Knob Switch, Horizontal, Black, 10′ Cap Tube,  230V

Key benefits

  • 115V and 230V models
  • For use with variable or two-speed blowers
  • Auxiliary heat controls available
  • Two wiring connections available: Color-coded terminal strip and six-pin plug
  • Black plates with modern graphics
  • Vertical and horizontal configurations
  • Horizontal 
  • Black
  • 10′ Cap tube 

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Weight3 lbs
Dimensions8 × 8 × 8 in


Unit Model

R – Series Mechanical


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