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Modulating Temperature Reset Controller, 70F to 140F
Automatic outdoor reset controllers for air or liquid.
Wiring-Temperature Controller
Dimension-Outdoor Reset Dual Bulb Temperature Controller
Dimension-Dimesnion for T991B
Product Data and Specifications-Specification Data for T991B Proportional Temperature Control (English)
Installation Materials-Installation Instructions for T475A, T678B, T991B Application Recommendations for Strap-on Mounting (English)
Product Data and Specifications-Product Data for T991B Proportional Temperature Controller (English)