Traditional HVAC Systems:
As we know traditional standard 4-pipe fan coil systems require domestic cold water, domestic hot water supply, domestic hot water return, heating water supply, heating water return, chilled water supply and chilled water return for a total of seven pipes. 2-pipe fan coil systems require five pipes; domestic cold water, domestic hot water supply and return – space heating water supply and return. In the cooling season, the heating pipes “changeover” to chilled water. Radiant baseboard systems have five pipes. Water source heat pumps have five pipes. Variable refrigerant adds refrigerant piping and controls plus the cost of electrical.
The Integrated Piping System (IPS™) adds a single pipe for a total of four (4) pipes; a domestic hot water supply & return, along with a domestic cold water supply & return. IPSTM is TWO IN ONE domestic water based mechanical system which has ONE Piping Distribution System, ONE Central Heating & Cooling Plant and uses Williams IPS fan coil in the system as HVAC fixture.
4 pipe risers can be reduced to 3 pipes or 2 pipes subjected to system temperature requirements. Fan coil can be shipped with or without copper risers.
Domestic hot/cold water distribution to suite plumbing fixtures can be copper or PEX tubing that can embedded in concrete slab connected to main fan coil risers.
IPS Fan Coil:
With IPS"! from Williams, your building’s domestic water service is also used to supply heating and cooling water to fan coil units located in each room, suite or office. Each IPS fan coil unit contains essential features specifically designed to work with IPS and is equipped with an individual thermostat allowing each occupant to have complete control of his/her environment. Also IPS™ fan coil unit is equipped with a circuit board that opens the heating and cooling valve every 24 hours to eliminate stagnation.
IPS Central Plant:
By utilizing the domestic water system - which is already managed to the optimum water temperature for space heating by code - IPS takes full advantage of the “central system” saving thousands of dollars in dedicated space heating piping and equipment such as boilers, pumps and storage tanks. Plus, managing the cold water temperature for space cooling opens up the opportunity for energy efficiency, heat recovery and economizer cooling (Reduce, Recycle & Reuse)..
IPS central heating and cooling system could be efficient chiller, condensing boiler, biomass plant, geothermal system with central water to water heat pumps, air source outdoor heat pumps, solar etc……
IPS Temperature Ranges:
Heating Mode: IPS™ central plant delivers domestic hot water (DHW) at 120oF and return it at 105oF or in some cases supply 140oF water and return it at 120oF. For application where DHW supply temperature is at 140oF, thermostatic mixing valve (TMV) will be provided (by others) either at each fan coil location or discharge side of central DHW tank to prevent scalding at the plumbing fixtures.
Cooling Mode: IPS™ central plant delivers domestic cold water (DCW) at 45oF to 50 oF and return it at 55oF to 60 oF or in some cases supply 40oF water and return it at 55oF.
ASHRAE Summer Comfort-Zone
Consult our Experts to know which temperature bracket suits your projects.
It is important to note that with IPS™ controls are relatively simple, giving a peace of mind to building operator as they can operate the building proficiently without going into excessive system training.
IPS Code Compliance:
Potable water for domestic use & water for heating & cooling with IPS™ remain 100% isolated from non-potable devices as per local plumbing codes. Since IPS™ is a domestic water system, no water treatment is necessary. Fresh water is introduced to the system daily.
The IPS™ fan coil unit is equipped with a circuit board that opens the heating and cooling valve every 24 hours to eliminate stagnation. This means the safety & integrity of the building’s potable water system is never compromised & water is safe enough to drink without creating any health hazard issues.
Moreover, when properly designed, IPS satisfy national and local code requirements.*
* Local code requirements should be consulted and adhered to. ABS & Williams are not responsible for final design approval.