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4.7.1.1 Avoid noise disturbance Locate outdoor units where noise from the unit cannot transmit to and disturb the home occupant or adjacent properties. Do not install the outdoor unit under or close to bedroom windows. Council bylaws regarding permitted noise levels at the property boundary must be complied with. Figure 4.9 Locate the outdoor unit where a solid barrier can block the sound There are several ways to reduce sound transmission: • Locate the unit where a fence or solid barrier can block sound so that the line of sight between source and receiver is blocked (Figure 4.9) but avoiding reflected sound transmission – consider the reverberation effects of lightweight materials such as corrugated iron fencing. • Mount the unit on neoprene isolation mounting blocks or pads to absorb vibration. • Ensure the owner is aware of the need to carry out regular maintenance to have worn bearings or other noisy parts replaced. solid fence/barrier to block sound 40-150 mm Figure 4.10 Wall-mounted indoor unit clearances 150 mm 2.0 m (high wall) to underside • in accordance with the manufacturer’s recommendations for minimum clearances – otherwise allow: – 40-150 mm minimum above and 150 mm minimum on either side of a wall-mounted unit – 2.0 m minimum (measured to the bottom of the unit) above floor for a high wall or ceiling-mounted unit – 50 mm minimum to each side for a floor console (Figure 4.10) • so that a clear airflow path is maintained • to minimise refrigerant pipe run lengths and bends (for each 90° bend, deduct 1% from the heat pump performance data) • so that the condensate drainage pipe can drain to outside without the need for a condensate pump. outdoor unit direction of sound 4.7.2 Indoor units Locate indoor units: • according to the type of unit, i.e. high wall, under-ceiling, floor-mounted • on an external wall if possible • toavoiddirectingairflowontoseatinglocationsorelectronicequipment • to direct airflow to the coldest point in the room • appropriately for room layout and airflow patterns 24 150 mm Do not locate the indoor unit: • in a tight corner • behind a grille • so it directs air to a primary source of heat gain or loss such as windows • where there may be any steam • within a kitchen or near an automatic insect repellent dispenser.PDF Image | Heat pump installation Good Practice Guide
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