Total resistance of field wiring should be limited to 2 ohms to maintain thermal accuracy

intrinsically safe liquid level control engineered for volatile environments where standard relays pose an ignition risk

the Johnson Controls P100AA-2 Pressure Control provides a compact and field-proven design

leak-proof fit with existing iron pipe or brass fittings

It maintains the precise GPM flow rate required to prevent stratified temperatures and localized overheating in the heat exchanger

Carrier 309433-211 Gauge 324846-701 Total resistance of field wiringThe Carrier 309433 211 is a commercial grade HVAC pressure and temperature gauge designed for precision monitoring in high demand hydronic and steam systems. Engineered with a 1 4" NPT connection, this dual scale instrument provides accurate readings for operating pressure up to 75 PSI and a temperature range of 60 320F. As a genuine OEM Carrier replacement part, it ensures direct compatibility with specific Carrier, Bryant, and Day & Night equipment,