1028 - CRWU171076 - Current Chiller Submittal.pdf

This is a technical submittal document for a Broan-MacQuarrie air-cooled chiller system (Model 30A0LM20-PT) proposed for federal contract BAFB, PR: 125822, dated December 19, 2016. The document is prepared by Technical Systems, Division RAE Corporation, with Account Manager Steve Corbin and Project Engineer Jarred Walker.

The chiller system is specified for one unit with design conditions of 95°F dry bulb ambient, 54°F entering fluid temperature, and 44°F leaving fluid temperature at 5,500 feet altitude. The unit delivers 10.1 tons of capacity at 25.52 GPM with an 8.6 energy efficiency ratio (EER). The system features two hermetic tandem scroll compressors optimized for R-410a refrigerant with R-410a solution at PG 30% propylene glycol, dual independent brazed-plate evaporators with motorized isolation valves, and an air-cooled condenser with four 1 hp fans rated at 28-inch diameter and 1,140 rpm for high-altitude operation. Electrical requirements include two independent 460/60/3 power feeds with 39 amp RLA and 5,000 amp SCCR rated panels per circuit. Standard features include microprocessor controls with BMS communication capability, constant flow operation, variable speed pump controller, 100-gallon triple duty tank, liquid line drier, flow switch, phase failure monitor with auto-reset, and extended five-year compressor warranty covering parts, labor, crane, and refrigerant costs. The system includes detailed engineering drawings, evaporator performance specifications from SWEP International, and operational sequencing documentation addressing local/remote mode operation, compressor staging, digital compressor unloading, condenser fan staging, constant flow VFD pump operation, and chiller redundancy protocols for duty/standby rotation.