Tips for installation of air-to-water heat pumps.

Field experiences show that air-to-water heat pumps require special attention to the entire system when installed in cold climates. Generally, equipment manufacturers provide installation and start-up instruction manuals on their factory-assembled heat pumps. Most manuals describe installation methods, precautions and warnings as to unit handling for example, but they normally cover only limited information about special applications of the units. Neglect of manufacturer's instructions will often lead to such serious troubles as repeated compressor failures and insufficient heating. This article discusses a few examples of important design considerations and recommendations gained by Toyo Carrier's field experience, which would be of practical use in designing a trouble-free system with air-to-water heat pumps.