Johnson Controls A11D-4 Temperature Control Els PW 17895 ensuring a secure pin connection

ensuring a secure pin connection and housing fit

Superior Media Coating: The clay-like surface enhances water retention and effectively traps mineral deposits from hard water

While it could be a faulty switch

supporting both DIN rail mounting and surface mount installations

This unit is the direct updated version for models 21-933

Johnson Controls A11D-4 Temperature Control Els PW 17895 ensuring a secure pin connectionThe 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