HVAC Controls Repair/Replacement

THE UNIT OPERATING SYSTEM IS CARRIER FINDINGS: Over the years, different center staff and contractors have revised the HVAC controls in various ways as to render the controls totally incapable of automatic operation. This includes the chiller, boiler, pump, air handler and makeup air controls. The heating and cooling is now manually controlled by center staff. When turned on the system operates continuously and overheats/overcools the building. This is inefficient, wastes energy and creates an uncomfortable environment. RECOMMENDATIONS: A HVAC Controls contractor is needed to repair/replace all control components required to bring the system back to the originally designed condition and sequence of operation including the fully functioning automatic control. Commission the refurbished system and include center staff in the process. Replacement is needed for all existing fan control switches with fan/light delayed off switches to allow continuous operation of the fans up to one hour after light switches are turned off. Contractor should provide Fantech FLD 60 (or equal) delayed off switches with adjustable time delay and face plate for each common toilet/shower room. Adjust the time delay for 15 minutes initially and provide technical assistance training to center staff as to how to increase time if the center deems necessary.