Section 7. Professional Maintenance; And Service; Heat Pump Design; Heat Pump Components And Operation - Jandy JRT Serie Manuel D'installation

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ENGLISH

Section 7. Professional Maintenance

and Service

7.1

Heat Pump Design

The Jandy heat pump is one of the most efficient ways
to heat a pool or spa. The heat pump transfers heat from
the outside air to the pool or spa water by means of an
internal heat exchanger.
When the fan is turned on, warm air is drawn through
the refrigerant charged evaporator, turning the cold
liquid refrigerant to a warm gas. The gas then flows
through the compressor where it is compressed resulting
in a much higher temperature.
The hot gas enters the heat exchanger where the water
extracts the heat. The pump pulls in cool pool water,
which in turn converts the hot gas back into a liquid
refrigerant and starts the cycle over again.
The JRT heat pump uses a refrigerant called R-410A. It
is a non-ozone depleting refrigerant that is accepted by
the EPA.
The EPA requires certification to purchase or use
R-410A. It is recommended that service personnel be
trained in installation, service, brazing, and maintenance
procedures.
NOTE The maximum heat output and efficiency of
a heat pump is dependent upon the quality
and performance of the major components
used. Equally important are the environmental
conditions (for example, air temperature,
humidity, water temperature, and wind).
7.2 Heat Pump Components and
Operation
Evaporator - As air passes through the evaporator, the
refrigerant in the evaporator absorbs heat from the
ambient air. The warmer the ambient air and the
larger the surface area of the evaporator the more
heat it can collect.
Fan - The heat pump fan produces high volume airflow.
Adequate airflow is required to move warm air
through the large evaporator.
Compressor - The compressor compresses the
refrigerant gas to a higher pressure, increasing the
temperature.
Heat Exchanger - As the final step to the heating
process, the heat exchanger transfers the heat
from the hot gas to the water. (Also known as a
condenser.)
Reversing Valve - (For Hybrid Units with Optional
Chiller and Hot Gas Defrost) The reversing valve
reverses the flow of the refrigerant, which results
in transferring cold gas to the water, thus lowering
the temperature.
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Jandy ® JRT Series Heat Pumps Installation and Operation Manual