Enthalpy Wheel (MASD) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Controller Tool Help

Brand
Johnson Controls
Metasys
Product name
Controller Configuration Tool
Document type
User Guide
Document number
LIT-12011147
Version
16.0
Revision date
2023-10-02
Language
English

This type of heat recovery coil uses a perforated wheel made of special material that can transmit temperature and humidity between the two airstreams. These devices are most beneficial during extreme temperature conditions, since this is when there is the maximum temperature difference between the exhaust and fresh air streams. During very cold conditions, it is possible to cool the heat wheel to the point that ice can form when exposed to the warm moist exhaust air. To prevent this, the heat wheel changes to LL-T Control mode if there is a chance of forming ice. During LL-T Control mode, the heat transfer is limited to allow a minimum Heat Recovery Exhaust Air Temperature of 39 °F.