a factory-approved overpressure protection device (OPD) is mandatory to meet ANSI Z21

this hydraulic unit is the standard for long-term consistency in fluid and airflow management

especially in systems where accurate refrigerant direction is essential

allowing for direct mounting to the supply plenum

Constructed with heavy-duty copper

Johnson Controls CD-WA0-00-2 Transmitter 318518-761 a factory-approved overpressure protection deviceThe Johnson Controls CD WA0 00 2 Transmitter is a high precision, wall mount solution designed for critical Demand Control Ventilation (DCV) and Indoor Air Quality (IAQ) monitoring. This professional grade unit features an integrated CO2 sensor and a dedicated analog temperature output, facilitating efficient climate control in commercial buildings. Utilizing patented CARBOCAP dual wavelength technology, the transmitter achieves superior long term