Specifications include, but are not limited to: 2.1 Remove existing packaged unit.: I. Recover refrigerant accordance with EPA Clean Air Act Section 608 requirements for servicing prior to equipment disposal.; II. Provide a weatherproof seal for the existing curb or ductwork opening(s) until replacement unit is installed.; III. Dispose of removed equipment.; 2.2 Install high-efficiency packaged unit.: I. Efficiencies should be at minimum 14-SEER and 80% AFUE where possible. Meet or exceed the more stringent minimum efficiency requirements between the list below and those set for the corresponding equipment type and capacity as outlined in ASHRAE 90.1-2019.: 1. <65,000 Btu/h: 14 SEER / 80% AFUE.; 2. >65,000 Btu/h, <135,000 BTU/h: 11.2 EER & 12.9 IEER / 80% AFUE.; II. Include capability for control-system actuated outside air ventilation and associated dampers for demand control ventilation on new equipment.; III. Integration to existing air distribution.: 1. Roof curbs: For rooftop units, install sloped roof curb-adapters fitted to the new rooftop unit and existing roof curb to minimize supply and return airflow resistance.; 2. Ground Pads: For ground-mounted units, center new equipment on the existing curb or install new plastic or concrete curbs where none exist.; 3. Ductwork: Tie into existing ductwork, installing concentric transitions and radius elbows, angles, or offsets to minimize supply and return airflow resistance.; 4. A minimum of MERV-8 filters should be installed with new equipment.; IV. Tie-In to existing utilities.: 1. Tie equipment to existing control wiring.; 2. Tie equipment to existing electrical disconnect box.; 3. Tie equipment to existing gas piping at piping shut-off.; 4. Clean out and reconnect or install new connections to tie into existing condensate drain lines.; V. Installation shall include all mounting, sealing, sensors, dampers, actuators, electrical components, and any other required materials or labor to ensure proper functionality of the newly installed systems.; VI. Labeling of equipment.: 1. All labeling must be clearly visible and done in a manner to prevent degradation over time.; 2. Label all equipment with permanent equipment labels. Labels must be UV resistant (i.e. engraved or embossed plaques, mailbox numbers, etc.).; VII. Provide Test & Balance on new equipment to ensure proper outside air ventilation and total supply air rates for each supply air register in the zone.
