EAW-DS Double Stack Spray Cooler

• Up to 95% reduced water usage compared to evaporative products
• 304L stainless steel tubing as standard
• Epoxy coated aluminum fins as standard
• All 304L stainless steel casing & structure as standard
• Simplified maintenance

Hot process fluid enters the inlet header connection, shown in red. Heat from the process fluid dissipates through the coil tubes surface and out to the fins. The unit operates completely dry and modulates fan speed as necessary based on process temperature requirements and ambient conditions.  When the unit can no longer maintain leaving fluid temperature set point in dry mode, the spray assist system is actuated.  The spray system nozzles spray water away from the coil, cooling the entering air and increasing the heat rejection capability of the unit.  The heat from the process fluid transfers to the cooled air and is discharged to the atmosphere. Cool process fluid exits the unit through the connections shown in blue.

Spray Assist System

• Ideal for high ambient dry bulb climates or high-temperature applications
• Copper tubing
• Tangential flow nozzles
• Once-through design
• No cold-water basin or pump – eliminates winter operation concerns associated with evaporative equipment
• Consult EVAPCO’s IOM for water quality recommendations.  

Reduced or Eliminated Water Consumption

Compared to traditional evaporative systems, the eco-Air series will either eliminate or dramatically reduce water consumption. Spray models only use water when the ambient conditions and load require it. Reducing water consumption also reduces the ongoing expenses related with the cooling equipment such as purchasing, treating, and disposing of water. When the eco-Air spray models are used in conjunction with the EVAPCO controls package, water conservation is maximized based on proprietary PLC logic.

Simplified Maintenance

The eco-Air Series significantly reduces the maintenance traditionally associated with fully evaporative systems. The eco-Air Spray Cooler is designed as a once through system, meaning it has no pump and no basin to hold water, which further reduces the time required for maintenance. 

Casing/Structure

• Casing and unit structure including vertical support members and anchoring channels constructed with Type 304 stainless steel as standard
• Type 316 stainless steel construction optional

Coils

• Constructed with Type 304L stainless steel tubing as standard for superior corrosion resistance and longevity
• Meets ASME B31.5 piping code
• Type 316 stainless steel coil construction optional
• Epoxy coating on fins as standard

Epoxy Coated Fins

• Increased corrosion resistance
• No impact on unit capacity
• Standard option on Spray Coolers

The eco-Air Double Stack Spray Coolers are provided in Belt Drive configuration with NEMA fan motors.  The motors on the eco-Air Series are pre-wired at the factory to UL standards, reducing costs associated with field wiring. 

NEMA Motors

• Belt drive – simple, reliable, easy to replace
• Zero maintenance sealed bearings
• VFD ready
• Severe duty

As standard, all motors on the eco-Air Double Stack V Series Coolers are wired to Individual Fused Disconnects in UL Type 4 enclosures.  Vibration switches, when selected, will be wired to a Low Voltage Terminal Box.  Solenoid valves for the spray pre-cooling system will be wired to the Low Voltage Terminal Box.

Electrical

• DPDT vibration switches
• Individual fused disconnects (UL Type 4)
• Low voltage terminal box

Maintenance Access

• Optional external service platform
• Large-hinged door for drive system access
• Full length internal drive access platform