Cleveland Controls DNS2-1590-00A High Pressure Switch

The Cleveland Controls DNS2-1590-00A High Pressure Switch is a factory-calibrated DNS2 Series air pressure switch built to sense positive, negative, or differential air pressure and open or close its contacts at a fixed set point. It is the high pressure switch of the DNS2-1590 pair; its companion is the Cleveland Controls DNS2-1590-00B Low Pressure Switch, and the two are separate, individually calibrated parts.

Inside, the DNS2 uses a dual-diaphragm sensing element with an integral snap-acting switch in a glass-filled polycarbonate housing, which gives it a narrow switching differential and stable set point across a wide temperature range. The series is calibrated at the factory from 0.05 to 10.0 in. wc with a tolerance of ±0.05 in. wc, and it is commonly applied to two-stage furnaces where separate high-fire and low-fire set points are needed. The pressure ports are color-coded: P1 (positive) is black and P2 (negative) is gray, and the electrical connections are quick-connect terminals. The platform carries UL, cUL, CSA, and CE approvals.

In service, a pressure switch like this proves airflow or draft before the control is allowed to continue its sequence. If the switch fails to make, the furnace or appliance locks out or short-cycles; if it sticks closed, the safety proving function is lost, which is why a failed or drifted switch should be replaced rather than bypassed.

Key Benefits

• Factory-Calibrated Set Point: Each DNS2 is set and sealed at the factory, so there is nothing to adjust in the field and the set point stays put.
• Narrow Differential: The dual-diaphragm, snap-acting design switches crisply, which helps prevent chatter and nuisance lockouts near the trip point.
• Simple Installation: Color-coded P1/P2 ports and quick-connect terminals make it a straightforward swap when you transfer the sample tubing and wiring from the old switch.
• Agency Approved: The DNS2 Series is listed to UL, cUL, CSA, and CE requirements for use in HVAC and appliance safety circuits.

Common Questions

• What is the difference between DNS2-1590-00A and DNS2-1590-00B? DNS2-1590-00A is the high pressure switch and DNS2-1590-00B is the low pressure switch. They are separate parts, so order the one that matches the letter suffix on the switch you are replacing.
• Which set point does it use? Every DNS2 is calibrated to a specific set point within the series range of 0.05 to 10.0 in. wc, so always replace with the exact DNS2 part number printed on the original switch label.
• Where does it connect? The P1 (black) positive port and P2 (gray) negative port take the sample line tubing, and the contacts land on quick-connect terminals. Move the tubing and wires over one at a time so nothing gets crossed.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.