The Johnson Controls P352PQ-2 is a high-performance Electronic Proportional Plus Integral (PI) Static Pressure Controller engineered for precise duct static pressure regulation in commercial HVAC systems. Combining proportional and integral control logic, it continuously corrects for offset errors and delivers stable, accurate pressure management across variable air volume (VAV) and air handling applications.
Pressure Control Range
- Sensing range: 0.025″ WC to 0.25″ WC
- Throttling range: 0.025″ WC to 0.25″ WC
Output Signal
- Proportional voltage output: 0 to 10 Vdc
- Proportional current output: 0 to 20 mA
- Compatible with a wide range of VFDs, actuators, and downstream control devices
Power Supply
- Supply voltage: 24 Vac (from transformer)
- Standard low-voltage supply simplifies integration with existing HVAC control panels
Indication & Diagnostics
- LED indication for at-a-glance status monitoring
- Simplifies commissioning and field troubleshooting
Key Features & Benefits
- Proportional Plus Integral (PI) control eliminates steady-state offset for tighter pressure regulation
- Dual analog output (voltage and current) provides flexible integration options
- Low-range sensing (0.025″–0.25″ WC) ideal for sensitive duct static pressure applications
- 24 Vac powered — compatible with standard HVAC transformer circuits
- LED status indication supports fast, efficient commissioning and diagnostics
- Compact design suitable for panel or field mounting in commercial HVAC environments
Typical Applications
- Variable Air Volume (VAV) system duct static pressure control
- Air handling unit (AHU) fan speed regulation via VFD
- Building automation system (BAS) integration
- Commercial and light industrial HVAC pressure management
