SCHWANK JS-0577-SS Blocked Flue Switch .58″ W.C.

Description

SCHWANK JS-0577-SS Blocked Flue Switch — Overview

The SCHWANK JS-0577-SS is a blocked flue safety switch engineered specifically for SCHWANK radiant heating systems. Designed to detect dangerous flue or vent obstructions, this switch monitors negative pressure in the flue path and trips at a calibrated set point of 0.58″ W.C. (inches water column). When a blockage is detected, the switch interrupts the burner control circuit, shutting down the heater before harmful combustion gases can back-draft into the occupied space — protecting both equipment and building occupants.

Key Features

• Factory-calibrated trip point at 0.58″ W.C. (inches water column)
• Designed as a direct OEM replacement for compatible SCHWANK radiant heater models
• Monitors flue/vent pressure to detect blocked or restricted exhaust conditions
• Interrupts burner control circuit upon activation for fail-safe shutdown
• Stainless steel construction (SS suffix) for enhanced durability and corrosion resistance
• Helps maintain compliance with safety and combustion venting requirements

Application

The JS-0577-SS blocked flue switch is intended for use as a safety interlock on SCHWANK infrared and radiant tube heaters. It is wired into the heater’s control circuit and continuously monitors flue back-pressure. If the exhaust path becomes obstructed — due to debris, bird nests, ice, or mechanical failure — the switch opens the control circuit and prevents unsafe heater operation until the blockage is cleared and the system is reset.

Why Use an OEM Blocked Flue Switch?

Using the correct OEM-specified blocked flue switch ensures accurate pressure calibration for your specific SCHWANK heater model. An improperly rated switch may fail to trip at the correct pressure, creating a potential safety hazard. The JS-0577-SS is factory-set to the precise 0.58″ W.C. threshold required by compatible SCHWANK equipment.

Product Specifications

• Brand: SCHWANK
• Part Number / SKU: JS-0577-SS
• Switch Type: Blocked Flue / Pressure Switch
• Trip Pressure: 0.58″ W.C.
• Material: Stainless Steel (SS)
• Application: SCHWANK Radiant / Infrared Heaters