ABSTRACT
The most common type of HVAC system used in the United States is the low pressure constant volume supply system. There are three categories of low pressure constant volume systems, single zone, reheat and multi-zone. The most predominant of these is the single zone. The first stage in the testing and balancing procedure is the preparation of test reports. Equipment test report sheets must be completed for each system. The necessity of working with test report forms in hydronic balancing is just as great as it is in air balancing. Test reports are an absolute necessity in balancing. Start the actual testing and balancing process at the heart of HVAC systems, at the fan. The motor on the fan is the organ that drives the fan and its electrical characteristics must be checked out and it must be protected.
