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remote sensors
If the board is functional
Featuring two internal auxiliary switches and a 2-10Vdc position feedback signal
A cracked insulator can cause the flame signal to ground out to the burner chassis before reaching the controller
Common Questions Is the 14004407-111 compatible with older TP910 series thermostats
Siemens Building Technology GMA221.1U Actuator Els PW 29614 remote sensorsThe Siemens GMA221. 1U is a high performance OpenAir damper actuator engineered for reliable 2 position (on off) control in critical HVAC environments. Operating on a 120 VAC power supply, this direct coupled unit delivers a robust 62 lb in torque (7 Nm), making it the primary choice for managing return air, mixed air, and exhaust dampers in both constant and variable air volume (VAV) systems. The integrated spring return fail safe mechanism ensures
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