Only the manufacturer's

Only the manufacturer's recommended outdoor grilles, wall/window cases, support systems, wiring kits, and other accessories shall be used in the unit's installation. 6. The joint around the unit's case and the wall or window shall be sealed weathertight with caulk, seals, or gaskets as provided by the manufacturer. 7. No holes shall be permitted in the bottom of the heat pump's case except to accommodate, when applicable, the manufacturer's approved internal condensate drain system. If utilized, condensate drain pipes shall be sized in accordance with manufacturer's recommendations; in all instances, individual runouts shall be at least as large as the heat pump drain connection. 8. All cabinets, cases, and components shall be properly aligned to avoid extraneous noise during operation.
Water Source Heat Pumps: Ground Water Source Heat Pumps (GWSHP) and Earth Coupled Heat Pumps (ECHP). All other sections of these standards are applicable unless otherwise noted.
If the refrigeration system heating capacity is less than 100 percent of the structure’s heat load at design, auxiliary electric heaters shall be used and sized in accordance with the Auxiliary Electric Heaters section. Emergency heat shall be installed and sized in accordance with the maximum sizing requirements for auxiliary heaters in the Auxiliary Electric Heaters section. 1. Ground Water Source Heat Pumps (GWSHP) − All ground water source heat pump water-to-refrigerant heat exchangers shall be made of cupro-nickel metal. − To ensure constant water temperature and quality, ground water shall be the only water source allowed for ground water source heat pumps (except when other sources of water can be proven to have a temperature and quality that can remain as constant as ground water). The installing QCN member shall be responsible for meeting all state and local drilling code requirements. Also, the QCN member is responsible for ensuring the well provides an adequate water flow for the ground water source heat pump based on the installation requirements.