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The Over-Pressure Protection Device (OPD) is a safety mechanism required for regulators used on piping systems with inlet pressures exceeding 2 PSI (up to 5 PSI) to protect downstream equipment in the event of a regulator failure
For technicians performing a Fenwal ignitor replacement
making it a direct and enhanced replacement for the DC24-44-T
and check for a dirty evaporator coil or blocked ductwork that could be causing heat buildup
It allows heating elements to reach operational temperature before the blower starts
Emerson Alco 062437 TXV Power Head 30067439-890 The Over-Pressure Protection Device (OPD)The Emerson Alco 062437 TXV Power Head, model XB 1019HW100 1B, is a high performance replacement power assembly designed for T series thermostatic expansion valves. This component is engineered for precise refrigerant metering in air conditioning and heat pump applications, specifically utilizing R 22, R 407C, and R 407A. Featuring a 5 foot capillary tube and a 1 4" SAE pressure connection, it provides the mechanical force necessary to modulate the