GeoAir InstallationMuch of the system installation is no different to what is traditionally setup except, the condenser loop is below ground and a heat pump replaces the conventional condenser.
1. Geothermal Loop
The geothermal loop is installed to depths of 80m and encased in a purpose-designed grout. Once the loop is installed it is connected to the heat pump and does not require any service and maintenance.
2. Heat Pump
Approximately the same size as a domestic dishwasher, the heat pump circulates the refrigerant through the geothermal loop and the internal fan coil unit. Location of the heat pump is typically where a conventional condenser would be placed. The heat pump is connected to the internal fan coil, electrical and controls in the same way a conventional air conditioning unit is.
3. Fan Coil Unit
All internal installation is no different to a conventional ducted system. QPS can either train your air conditioning contractor or provide you with a suitably qualified installer.
4. In Ceiling Ducting
There are no changes to the installation of the system over a conventional ducted system. All ductwork remains the same as with a conventional system.
How is GeoAir™ Installed?
There are two stages of installation that are easily identified as ‘in ground’ and ‘above ground’. The difference with a geothermal system is that a large part of the installation occurs below ground. The GeoAir heating system is known as a “Direct Exchange”, or a “DX” geothermal system because it exchanges geothermal heat directly with the ground.
In Ground Installation
As the geothermal system has a condenser loop installed into the ground to depths of up to 80m; a specialist-drilling rig is required on site to perform these works. The size of a large excavator, the drilling rig requires access to and on the site to perform works. The installation of one geothermal loop typically takes one day, it is important that this be co-ordinated with other building works. Where the system requires more than one loop, an 8m separation is required and a trench is needed to be excavated to connect the loop to the heat pump (typically at 800mm depth). As with the geothermal loop, once installed, we do not need to access again.
The installation process involves drilling a well to depth. Once drilled, the geothermal loop is lowered into the ground and a geothermal grout is injected from the bottom of the well to the surface. This grout sets hard and acts as both a protector of the loop and a source of heat transfer into the surrounding ground. The loop never requires maintenance and is completely invisible.
Above Ground Installation
All of the above ground and internal works do not differ from a conventional system and can be performed by any air conditioning contractor. The geothermal heat pump would typically be installed at the same location as the conventional condensing unit with all electrical, refrigerant and control connections being the same.
The GeoAir Heat Pump is the heart of the system. This proprietary designed unit controls circulates refrigerant between the outdoor, GeoAir loop, and the indoor, fan coil unit. Small, compact and quiet, the GeoAir heat pumps provides design and acoustic benefits in addition to high levels of efficiency.
GeoAir heat pumps are Australian designed and manufactured, offering highest level of quality and ongoing support whilst support employment in the local manufacturing industry.
Fan Coil Unit
A fan coil supplies the heated or cooled air into your home with air circulated through in ceiling ductwork. GeoAir uses high quality Australian manufactured units. All internal installation is the same as a conventional ducted system.
A wall mounted thermostat controls the system and changes mode from heating to cooling.
Where more complex controls are required, the GeoAir system has the ability to integrate into any building management system.
Geothermal Ground Loop
The GeoAir geothermal sub-surface heat exchanger (“GSHE”) is installed to depths of up to 80m. This heat exchanger consists of supply and return cooper lines that reject heat when operating in cooling mode and collect heat when operating on heating mode.
The number of geothermal loops is dependent upon the size of the project. A typical suburban home may only require one loop where larger properties will require multiple.