To adjust switch set point anytime, tun top screw until red bar reaches desired set point. Complete instructions included. Reliable and convenient , the 1996-20 Gas Pressure Switch serves as a compact, low cost switch for gas fired furnaces and equipment. Visible set point and on-off indicators add convenience in servicing. Use either NO or NC contacts on SPDT switch.
Top connection vents diaphragm chamber to outside or to furnace combustion chamber.
Motion of the diaphragm shall be restrained by a calibrated spring that can be adjusted to set the exact pressure differential at which the electrical switch will be actuated. Visible set point and on-off indicators shall be incorporated in the switches. Motion of the diaphragm shall be transmitted to the switch button by means of a direct mechanical linkage. Inc. Catalog No. 1996-20. G. The H2 is designed for sequencing two different actions as pressure of a liquid or gas increases or decreases.