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Install the barometric damper in a bypass duct between the supply plenum (before any zone dampers) and the return air duct
preventing localized stress and maximizing the operational lifespan of the boiler block
No Minimum Pressure: Direct-acting design allows the valve to operate effectively at 0 PSI differential
Durable 20VA Capacity: Sufficient power to handle modern digital thermostats and complex relay configurations
Carrier 32LT660004 Drive 321894-708 Install the barometric damper inThe Carrier 32LT660004 Motor Master Drive is a precision engineered solid state head pressure control designed to maintain optimal condenser performance across a wide range of ambient temperatures. Operating at 208 230V 1Ph, this Variable Frequency Drive (VFD) manages fan speed by sensing liquid line temperature, ensuring stable head pressure during low ambient cooling cycles. This specific Motor Master fan speed control serves as the authorized
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