38 FEATURE the plant and the flats means there is little chance of their being any noise pollution from the fan coil unit . The water that is heated by the fan coil is stored in 2 x 5 000l plastic tanks located in the basement plant room .
This further assists with heat pump efficiency , especially in the winter when water can be heated during the warmer daylight hours and used at night when ambient temperatures drop .
Heat Pump plant room EESCO .
However , in this case with the plant located in the basement , re-cycling cold air would occur if this technology were used . As a solution the company have developed a heat pump that uses a water to refrigerant heat exchanger ( Shell & Tube ) to evaporate the liquid refrigerant .
The water used in this cycle is heated by a standard air – water fan coil heat exchanger which is located 50m away on top of the guard house roof . The fact that this unit can be located a distance from
EESCO
This is a hot water storage vessel – condenser water tanks , pipework , and pumps . An outside air fan unit on top of the gate house , some 50m away , assists in noise reduction . The noise and space requirements of traditional ‘ all-in-one ’ air-towater heat pumps were completely re-thought at Washington Mews and the previous heat pump and storage vessel plant room was made available for commercial space .
The hot water reticulation rises in the extended ducts to the apartments . Each apartment has a hot water meter . The copper insulated circulation system is provided with thermostatic balancing valves connecting to the basement hot water plant room where the circulation pumps are positioned .
A borehole pumps water to a roof tank where irrigation water serves the garden area through gravity tanks . The future treated wastewater could provide irrigation water .
The separate water reticulation serving WCs is initially supplied with municipal water via WC gravity tanks . This reticulation will be served by treated and sterilised wastewater in the future . After testing and treatment the WC system could also be supplied with borehole water .
Other aspects of this complex plumbing installation include the fire installation serving hose reels and hydrants with a basement tank and a hose reel booster pump and basement booster pumps . PA
Owner / Developer Main Contractor and QS Architect
Wet Services Consulting Engineers Plumbing Contractor Hot Water plant and pumps Electronic water meters Taps and mixers Pipes , fittings , sanware
Netwater Properties ( Pty ) Ltd Netwater Properties ( Pty ) Ltd Agora Consulting ( Pty ) Ltd Wills Franklin Pretorius ( Pty ) Ltd
Rehoboth Projects ( Pty ) Ltd Elemental Energy Supply Company Kamstrup Viking Plumbgo
“ The result is a completely transformed building in the most modern architectural design .”
www . plumbingafrica . co . za @ plumbingonline @ plumbingonline @ PlumbingAfricaOnline September 2021 Volume 27 I Number 7