Freezestat alarm - Johnson Controls - LIT-12011950 - Building automation software - Smart Equipment Controller - 5.0

Smart Equipment Controls Sequence of Operation Technical Bulletin

Product name
Smart Equipment Controller
Document type
Technical Bulletin
Document number
LIT-12011950
Version
5.0
Revision date
2024-06-06
Product status
Active

A freezestat must be field-supplied and field-installed.

When 24 VAC is not present on terminal FSHW and the outdoor air temperature is greater than 40°F, no action is taken and the unit operates normally.

When 24 VAC is not present on terminal FSHW and the outdoor air temperature is 40°F or less, the hot water valve opens 100%, the indoor fan de-energizes, the economizer outside air damper is fully closed, and all other fans de-energize.

The control returns to normal if either 24 VAC is present on terminal FSHW or the outdoor air temperature rises above 40°F.