Water Source Heat Pump System Replacement

2026-11-03

Specifications include , but are not limited to : I . Rooftop Unit The Contractor shall furnish and install one ( 1 ) new packaged rooftop water source heat pump meeting or exceeding the following specifications : • Manufacturer : AAON • Model : RNA - 030 - WSHP • Series : RN • Type : Water Source Heat Pump Packaged Rooftop Unit • Electrical : 460V / 3 Phase / 60Hz • Installation shall include all required rigging , curb adapters if required , reconnection to existing ductwork , piping connections , and condensate drainage . • Approved equals will be considered provided the equipment meets or exceeds the specified performance and electrical requirements . II . Cooling Tower The Contractor shall furnish and install one ( 1 ) cooling tower meeting or exceeding the following specifications : • Manufacturer : SPX Cooling Technologies ( Marley Brand ) • Model : MD5006NAF1L • Type : Marley MD Steel Counterflow Induced Draft Open Cooling Tower • Installation shall include crane services , electrical reconnection , makeup water connection , overflow piping reconnection , and startup assistance . III . System Design Performance Requirements The installed system shall operate in accordance with the following design conditions : • Condenser Water Flow : o Required Flow : 90 GPM • Entering and Leaving Water Temperatures o Entering Water Temperature : 85 ° F o Leaving Water Temperature : 95 ° F • Cooling Tower Design Conditions o Wet Bulb Temperature : 75 ° F o Dry Bulb Temperature : 95 ° F • The cooling tower and associated equipment shall be installed to support the full rated capacity of the specified rooftop unit under the above conditions . IV . Condenser Water Pumps A . Required Pump Configuration o Manufacturer : Taco o Model : F13007 or approved equal meeting the specified capacity of 300 GPM at 40 feet of head o Pump Size : 4 x 3 o Quantity : Two ( 2 ) pumps , identical B . Contractor Responsibilities The Contractor Shall : o Furnish and install two ( 2 ) new Taco F13007 pumps , or approved equal . o Provide pumps complete with manufacturer - recommended motors rated for 460V / 3 Phase / 60Hz . o Provide proper alignment and base mounting . o Replace pump insulation and protective pump covers . o Provide new isolation valves , strainers , and flexible connectors . o Pressure test and balance the system to achieve the required 90 GPM system flow . o Configure pumps in a lead / lag arrangement , with one pump operating under normal conditions and the second pump serving as a standby unit . V . Demolition The Contractor shall remove and properly dispose of the following existing equipment : • Existing rooftop water source heat pump • Existing cooling tower • Existing condenser water pumps • Associated piping as required to facilitate installation of new equipment • All demolition materials shall be removed from the site and disposed of in accordance with applicable regulations .

North Carolina

2026-05-08