What are the wiring colors

and auxiliary heating circuits

140 is the opening temperature (140°F)

This part is a staple in kits used to replace obsolete 2B pilot models

How do I test the BASO K16BT-30 thermocouple range

Functional Devices TR40VA013 Transformer What are the wiring colorsThe Functional Devices TR40VA013 is a multi tap 40VA control transformer engineered for versatility in demanding HVACR and industrial automation environments. This step down transformer features primary voltage taps for 480 277 240 208Vac, converting line power to a stable 120Vac secondary output. Built for durability, it includes an integrated circuit breaker for reliable overcurrent protection, eliminating the need for external fusing in many