Know when to change your air filter! Qty Per Unit: – 1
G99-14 Air Gage Remote Mount extends the installation location by 10 feet. No more guessing! An easy-to-use, easy-to-read gage to monitor filter media loading so that filter media may be changed when needed. The gage is installed between the blower and the filter, where a slight vacuum exists due to the air-flow resistance of the air filter. Air flowing into the gage, around the calibration screw, lifts a vane in proportion to the negative pressure in the blower compartment. As the air filter loads, the vacuum increases, raising the vane to indicate a filter change is necessary.
APPLICATION: The G-99 Air Filter Gage provides a visual indication of the need to replace air filters in forced air heating and cooling systems. The gauge is installed between the blower and the filter where a slight vacuum exists due to the airflow resistance of the air filter. Air flowing into the gage, around the calibration screw, lifts a vane in proportion to the negative pressure in the blower compartment. As the air filter loads, the vacuum increases, raising the vane to indicate a filter change is necessary. The gage may be calibrated in a negative pressure range from 0.1 to 0.4-inch w.c. When properly calibrated in this range a vacuum increase of 0.10 to 0.15-inch w.c. will indicate a filter change is necessary.
PRECAUTIONS: The installer should be an experienced service technician. When drilling the hole in the blower compartment extreme care should be taken not to damage components within the heating or cooling system.
INSTALLATIONS: The gage must be located where it can sense pressure conditions in the blower compartment between the filter and the blower. Select a location on a vertical surface enclosing the blower compartment and drill a 3/8″ hole. Remove the protective paper from the foam adhesive strip on the back of the gage. Mount the gage in a level position with the pressure sensing tube projecting into the blower compartment.
CALIBRATION: Install a clean filter and run the blower at the highest speed. With a small screwdriver adjust the calibration screw, on the face of the gage, to put the pointer in the clear area in the center of the green “FILTER IS CLEAN” range.
SERVICE: The gage may be disassembled for service although this should rarely be required since it contains a small filter screen to stop dust from entering the area of the vane. Remove gage and, from the back, push white plastic clips out with a blunt tool. Remove the calibration screw, lift off the clear cover, and dust all parts with a clean brush. Reassemble and test that the vane moves freely in the gage. A fresh adhesive strip may be required to reinstall.