ON
OFF
UNITS
ZERO
ON
OFF
UNITS
ZERO
NEGATIVE
(Low Pressure Port)
_
POSITIVE
(High Pressure Port)
+
DIGITAL
DIFFERENTIAL
MANOMETER
FAN INLET PORT
“T” JOINER
GAS VALVE VENT PORT
GAS VALVE MANIFOLD PORT
Target Offset Pressure
-0.2 inch wc
DIGITAL MANOMETER
CONNECTION
15
For detailed information, refer to the complete installation and owner’s manual.