STATIC PRESSURE DIAGNOSTIC
Penguin Air & Plumbing - Interactive Field Tool
Version 4.4
Job Information
From the equipment data plate. Usually 0.50.
Both Zones Calling
Enter as positive (gauge reading)
Enter as positive (gauge reading)
Zone 1 Only (Zone 2 Closed)
Zone 2 Only (Zone 1 Closed)
Pressure Budget Analysis
Zoning Problem Check
Bypass Damper Sizing
If zoning problem exists (TESP jumps >0.2"), bypass damper is needed
Read from furnace blower curve at the high TESP value
DAT Sensor (Freeze Protection)
DAT = supply air TEMPERATURE sensor (not pressure). When supply air gets too cold (coil freezing risk), it triggers a purge cycle: compressor/furnace OFF, fan ON only, until coil warms. Then restarts.
When to Recommend DAT Sensor
Always recommend DAT sensor on zoned Honeywell systems
Especially important if: TESP jumps above 0.7" when a zone closes (creates high supply velocity and coil freezing risk)