EVAPCO ESWA User Manual

Operation and
Maintenance Instructions
For EVAPCO Closed Circuit Coolers and
Evaporative condensers
for LIFE
Internat iona l In stitute of
Ammo nia Refrigeration
www.iiar.org
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EVAPCO ESWA Specifications

General

Application	Industrial
Heat Rejection Capacity	Varies by model
Construction Material	Galvanized steel
Cooling Capacity	Varies by model
Sound Level	Varies by model
Dimensions	Varies by model
Weight	Varies by model

Summary

Introduction and Safety

Safety Precautions

General safety guidelines for operating, maintaining, or repairing equipment.

Initial Storage and Idle Period Recommendations

Unit Start-Up Checklist

Recommended Maintenance Schedule

Seasonal Shut-Down Checklist

Basic Cooler/Condenser Sequence of Operation

Fan System Maintenance

Fan Motor Bearings Maintenance

Fan Shaft Ball Bearings Lubrication

Fan Belt Adjustment Procedures

Procedures for checking and adjusting fan belt tension for proper operation.

Induced Draft Belt Driven Unit Adjustment

Specific belt adjustment methods for induced draft units.

Forced Draft Belt Adjustment

Belt adjustment guidelines for forced draft units.

Fan System Capacity Control

Fan Motor Cycling for Capacity Control

Variable Frequency Drives (VFDs)

Multi-fan VFD Operation Guidelines

Two Speed Motors for Capacity Control

Two-Speed Motor Sequence of Operation

Recirculated Water System Maintenance

Suction Strainer Cleaning

Water Make Up Valve Adjustment

Pressurized Water Distribution System Check

Water Treatment and Chemistry

Bleed or Blowdown Procedures

Galvanized Steel Passivation

Water Chemistry Parameters

Recommended chemical parameters for water treatment.

Control of Biological Contamination

Measures to minimize risks from waterborne pathogens like Legionella.

Cold Weather Operation

Recirculating Water Freeze Protection

Methods to prevent freezing of recirculating water.

Closed Circuit Cooler Coil Freeze Protection

Protecting heat exchanger coils from freezing.

Cold Weather Capacity Control Methods

Strategies for managing unit capacity in cold weather.

Ice Management Strategies

Strategies to manage ice formation in extreme ambient conditions.

Troubleshooting Common Issues

Overamping Fan Motors

Causes and remedies for fan motors drawing excessive current.

Unusual Motor Noise Issues

Diagnosing and resolving abnormal motor noises.

Incomplete Spray Pattern Issues

Addressing issues with the water spray pattern.

Fan Noise Diagnosis

Scaled Inlet Louvers on AT Units

Overamping Pump Motors

Causes and remedies for pump motors drawing excessive current.

Makeup Valve Not Shutting Off

Troubleshooting makeup valve issues.

Electric Water Level Control Malfunctions

Troubleshooting electric water level control systems.

Replacement Parts Information