INSTALLATION CONSIDERATIONS
Any heat pump will only operate as good as it is installed. A very good and effective heat pump will become poor and ineffective if it is installed poorly and or incorrectly. 90% of Manufactures and supplier’s complaints and service calls are as a result of poor installations. The following are basic considerations that need to consider when a heat pump is installed.heat_pumps_residential_copy

Positioning of Heat Pump

While different heat pump manufactures have certain requirements for locating and positioning their heat pumps, there are basic locating and positioning principles that must be followed. Incorrect locating and positioning may result in poor performance of the heat pump.

Ventilation

Because the air source heat pump uses the environmental energy in the air, it is important that the heat pump is located in a position that is well ventilated, so that the heat pump can continually draw from this heat energy.

Openings

Fans and compressors make noise. As result of this noise, the heat pump unit must be installed in such a way as to minimise the transmission of the noise from the heat pump unit into the environment, especially during the night. Take opening windows, doors, the sleeping areas of the household and any adjacent buildings into account when positioning the heat pump.

Distance

Heat loss is greatest in a plumbing system through long pipe runs or dead legs. As result of this, careful consideration should be taken when positioning the heat pump unit as optimal efficiencies will be achieved when placing a split type heat pump unit in a position that will result in shorter pipe work to and from the geyser.

Height

Bearing in mind that a heat pump unit circulates the water to and from the geyser by means of a water pump. All water pumps are limited to the head of pressure that they can pump to during start up. As a result of this, the vertical distance or head pressure must be considered when positioning the heat pump unit especially when installing on a multi-story dwelling,

Sizing a Heat Pump

The sizing of a domestic heat pump system is simply based on the volume of hot water required by the user. This will vary enormously from family to family, however a rule of thumb of 50 litres of hot water per person and hot water usage appliances per day should be allowed for.

However, in most cases a split type heat pump unit is retrofitted to the existing hot water storage cylinder and therefore sizing of a split type heat pump is based on the volumetric size of the hot water storage cylinder.

It is important that the heat pump is correctly sized to the hot water storage cylinder. Failure to do so could result in erratic temperature swings and poor efficiency of the heat pump, not to mention unhappy family members.Commercial_heat_pump_copy

An undersized heat pump would not only result in the heat pump overworking, thus increasing the wear and tear on the heat pump components, but also a poor energy efficiency ratio or COP.

To correctly size a heat pump to a hot water storage tank, one needs to refer to the relevant manufacturers specifications for their heat pumps performance and their recommendations.

Existing Geyser

In most cases a split type heat pump is retrofitted to the existing geyser in the home. The following should be consider when using the existing geyser.

Age

How old is the geyser to which the heat pump is being retrofitted. The older the geyser the greater possible complications may result from the retrofitting.

Position

Heat loss is greatest in a plumbing system through long pipe runs or dead legs. As result of this, careful consideration should be taken when positioning the heat pump unit as optimal efficiencies will be achieved when placing a split type heat pump unit in a position that will result in shorter pipe work to and from the geyser.swimming_pool_heat_pumps_copy

Guarantees / Warranty of the Geyser

When retrofitting a split type heat pump to an existing geyser the heat pump pipe work needs to be integrated into the existing geyser cylinder. Each heat pump manufacturers has a different methodology in achieving this this however it is important to confirm if integrated methodology does not compromise the warranty or guarantee of the geyser to which the heat pump is being retrofitted.