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Delta Star® Water Cooled Water Chiller: 1/3HP - 1 1/2HP

Delta Star Water Cooled Chiller DS-7-WC


Very popular in the public aquarium and aquaculture industry Aqua Logic's Delta Star inline water chillers feature water cooled condensers, making them ideal for installations with an existing freshwater supply. They use water to cool the condenser instead of air provided by a fan and motor. Their low heat emission, compact size, and quiet operation allow them to be used in tight spaces with minimal ventilation.

Sources of the cooling water include the facility's chilled water loop, municipal water supply, cooling tower, or well and spring water.

Each unit includes titanium heat exchanger, water control valve for the condenser, digital temperature controller and black ABS cover. Available in sizes from 1/3hp thru 1-1/2hp.


Model Number Horse Power BTUH Removal Capacity Volts/Phase Amps Flow (gpm) Min/Max In/Out FIPT(in) Length(in) Width(in) Height(in) Weight(lbs)
DS-3-WC 1/4 3,080 115 5.4 8/15 3/4" 19" 12" 11" 60
DS-4-WC 1/3 4,050 115 7.2 10/20 3/4" 22 1/2" 13" 11" 66
DS-5-WC 1/2 6,000 115 9.5 12/25 1-1/2" 24" 15 1/2" 13" 100
DS-6-WC 1/2 6,000 230 4.8 12/25 1-1/2" 24" 15 1/2" 13" 100
DS-7-WC 3/4 9,500 115 13.0 15/30 1-1/2" 25" 21" 15" 112
DS-8-WC 3/4 9,500 230 7.0 15/30 1-1/2" 25" 21" 15" 112
DS-9-WC 1 12,000 230 7.2 20/35 1-1/2" 27" 24" 15" 117
DS-10-WC* 1.5 21,000 230 10.5 25/40 1-1/2" 31" 26" 19" 147
*Uses R-22 refrigerant. Water must be pumped through the chiller. Pump is not included.


Dimensions & Air Flow

Many factors will have an influence when determining the size water chiller required for a particular application. While standard Btu calculations will give you a good starting point for sizing, many environmental and system design parameters must be considered. While sizing charts can be helpful, one chart DOES NOT work for all chiller installations.

Sizing charts for marine reef tanks (under 1500 gallons) are based on "typical" setups using the common life support equipment (LSS), such as pumps, filters, and lighting. However, some tanks have more pumps or higher wattage lighting then what might be considered "normal". This must be considered when looking at a sizing chart. The sizing chart we provide for reef aquariums is based on many years of experience and a typical tank setup.

The sizing charts for aquaculture system, large public aquarium tanks and other fish holding systems are different then that of the marine reef tank. These systems may contain just one large tank or multiple tanks, located indoors in a controlled environment or outdoors in direct sunlight, and every situation in-between. These systems may require less hp per gallon then reef aquariums. Adding insulation and thermal pane viewing windows will decrease the amount hp per gallon required.

For hydroponic applications nutrient solutions need to be cooled. Although the volumes may seen small it is spread out over a large area and there is a tremendous amount of heat input from either grow lights or natural sunlight. This heat input is greatest when plants are young but as they grow and start shading their growing trays the heat input decreases. Due to the numerous variety of set ups these systems can be difficult to size.

We provide a questionnaire that you can fill out and return to us for help in sizing a chiller for your particular application. The more information you provide the better.

As always we have a staff of technicians that are ready to help answer any technical questions you may have.

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