The Functional Devices TR50VA004 Transformer is a heavy-duty 50VA power transformer engineered for multi-tap versatility in commercial and industrial HVAC control circuits

typically supporting up to 230°F depending on the specific pump model

Advanced Diagnostics: Compatible with hand-held tools for quick troubleshooting of flame signal and lockout history

the unit features an Auto/Manual toggle switch

018 orifice for Natural Gas and a

Marvair 70050 Pressure Switch 320788-703 The Functional Devices TR50VA004 TransformerThe Marvair 70050 Pressure Switch is a critical safety component designed for precise refrigerant monitoring in Marvair ComPac wall mount air conditioners and heat pumps. This low pressure switch (LPS) is engineered to prevent compressor damage by breaking the electrical circuit when system pressure falls below safe operating thresholds. With a factory set open pressure of 35 PSI and a close pressure of 60 PSI, it ensures the system does not operate