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providing reliable fire damper protection for both vertical and horizontal mounting configurations
While it could be a faulty switch
ensuring a perfect physical fit and proper clearance for the fan blade assembly
This unit is the direct updated version for models 21-933
Johnson Controls A11D-4 Temperature Control Els PW 17895 providing reliable fire damper protectionThe Johnson Controls A11D 4 Temperature Control is a heavy duty low temperature cutout freezestat engineered specifically to protect hydronic coils, cooling coils, and liquid handling pipes from icing and over cooling. This mechanical temperature control utilizes a 20 foot sensing element to detect the coldest point along its entire length, ensuring that localized freezing triggers the safety response. With a SPDT switch and manual reset