Coronado Springs Resort, Boiler Replacement

The first element of this project included an inventory and assessment of the air-cooled chillers at the resort. The project consisted of ten (10) chiller systems located throughout the resort serving the Guestroom Buildings and the Water Feature Building. Most of the chillers were of the rotary screw compressor design ranging in size from 60 tons to 270 tons. Site investigations were completed to determine the physical integrity of the equipment including compressors, condenser coils, electrical components, controls, and equipment run times as well as to review installation conditions.  Performance testing was carried out on all of the chillers to record water side, air side, and refrigeration operating conditions, and electrical power usage and chilled water pump operation.

Engineering analysis was performed to determine chiller percentage of original design capacity, compressor input and output, actual chiller capacity, and energy efficiency ratio (EER). A report with recommendations was provided to present the results of the field investigations and the equipment testing in a concise manner. An equipment matrix was included to provide the Owner with a mechanism to assess the need and timetable for chiller replacements.

The second element of the project included providing engineering services for boiler replacements at Casitas Buildings 3, 4, and 5.  Casitas Building 3 is a 600-room hotel with adjoining convention center. The boilers provide all the domestic hot water needs for the facility. In addition to the boiler replacement the project included replacement of four 300-gallon hot water storage tanks with premium ASME tanks having a warrantied 25-year service life.  

The Casitas Building 4 project comprised the replacement of the domestic water heaters and storage tanks and included complete design plans and specifications for removal of the existing equipment and installation of the new domestic water heating equipment.  The new design was based on high efficiency condensing type boilers.  The scope of services included removal and replacement of required ductwork and piping, providing new hot water recirculation pumps, mixing valve assemblies and required ancillaries; confirming water heater capacity based on metering data and existing data; confirming ventilation and combustion air requirement for new equipment and modifying the existing intake louvers and exhaust flues; providing domestic hot water flow diagram; and providing mechanical demolition plans to indicate equipment to be removed and the extent of project demolition.

AVCON was responsible for design plans for the replacement of water heater equipment in the Casitas Building 5 project.  The water heater system design included removal and replacement of required ductwork and piping, providing new hot water recirculation pumps, mixing valve assemblies, and required ancillaries.  AVCON confirmed the water heater capacity based on metering data and existing data; confirmed ventilation and combustion air requirement for new equipment and modified the existing intake louvers and exhaust flues; and provided a Domestic Hot Water Flow Diagram as well as mechanical demolition plans to indicate the equipment to be removed and the extent of project demolition.