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Key Benefits Precise Compatibility: Engineered as a drop-in replacement for Barber Colman AT-11-399 and AT-24-399
The T-3300-1 is designed to control standard pneumatic actuators for valves and dampers
Setting it too close to the freezing mark (32°F) may not provide enough lead time to stop the fan before ice forms in the copper headers
Techs should verify the actuator assembly alignment and ensure all electrical connections are wired in series with existing operating limits
MARS 50319 Transformer 320735-701 Key Benefits Precise Compatibility: EngineeredThe MARS 50319 Transformer is a heavy duty, multi tap HVAC control transformer engineered for versatile voltage step down in commercial and residential climate systems. As a 50VA NEMA Class II power source, this unit provides the necessary 24VAC output to drive thermostats, contactors, and integrated circuit boards. The primary side supports 120 208 240 480V inputs, making it a "truck stock" essential that can replace a wide range of OEM or Honeywell
