EVAPCO ATW User Manual

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Bulletin 116-E Metric

EVAPCO Products are Manufactured Worldwide

EVAPCO, Inc. (World Headquarters) P.O. Box 1300, Westminster, Maryland 21158 USA

Phone (410) 756-2600 - Fax (410) 756-6450

For EVAPCO Authorized Parts and Service,

Contact Your Local Mr. GoodTower

®

Service Provider

or the EVAPCO Plant Nearest You

www.evapco.eu

ATC-E / eco-ATC eco-ATWE LSWA(-H) / LSCE LRW(-H) / LRC ESWA PMCQ

ATW / eco-ATW

EUROPEAN

OPERATION AND MAINTENANCE INSTRUCTIONS

For EVAPCO Induced Draft and Forced Draft

Closed Circuit Coolers and Evaporative Condensers

EVAPCO Europe

bvba

Heersterveldweg 19

Industrieterrein Oost

3700 Tongeren, Belgium

Phone: (32) 12 395029

Fax: (32) 12 238527

E-mail: evapco.europe@ evapco.be

EVAPCO Europe S.r.l.

Via Ciro Menotti 10

I-20017 Passirana di Rho

Milan, Italy

Phone: (39) 02 9399041

Fax: (39) 02 93500840

Email: evapcoeurope@evapco.it

EVAPCO Europe GmbH

Insterburger Straße, 18

D-40670 Meerbusch, Germany

Phone: (49) 2159-6956-0

Fax: (49) 2159-6956-11

Email: info@evapco.de

Table of Contents

Other manuals for EVAPCO ATW

Maintenance Instruction20 pages

Questions and Answers:

B
Brittney SmithAug 9, 2025
What to do if EVAPCO Accessories fan motors are overamping?
- D
  Debra FletcherAug 9, 2025
  If EVAPCO Accessories fan motors are overamping, several factors could be responsible. It could be due to a reduction in air static pressure. For a forced draft unit, make sure the pump is on and water is flowing over the coil. If the pump is off, and the unit wasn't designed for dry operation, the motor might over-amp. Also, check the voltage across all three legs of the motor for any electrical issues. Verify the fan rotates correctly, and if not, switch the leads. Ensure the fan and motor turn freely by hand, checking for internal damage or bearing issues. Finally, check for proper belt tension, as extreme tension can cause overamping.
S
Scott WestAug 19, 2025
Why is my EVAPCO Accessories motor making unusual noise?
- B
  Barbara SchmidtAug 19, 2025
  Unusual motor noise in EVAPCO Accessories can stem from various issues. The motor might be running single-phase; if you stop and try to restart it, it won't start again. Check the wiring, controls, and the motor itself. Incorrectly connected motor leads could also be the culprit, so verify the connections against the wiring diagram on the motor. Bad bearings are another potential cause; check the lubrication and replace the bearings if necessary. An electrical unbalance, where voltage and current are uneven across the three lines, can also lead to unusual noise, so check and correct if needed. Also, inspect for a non-uniform air gap and rotor unbalance and correct bracket fits or bearing, rebalance, reinstall or replace the fan if required.
C
Charles MooreAug 28, 2025
How to fix an incomplete spray pattern in EVAPCO Accessories?
- I
  ihollandAug 28, 2025
  An incomplete spray pattern in EVAPCO Accessories could be due to several reasons. The nozzles might be clogged, in which case you should remove and clean them, and flush the water distribution system. Another possibility is that the pump is running backwards; visually verify the pump rotor rotation by turning the pump off and then on, and verify the amp draw. Inadequate pump flow for a remote sump could also be the issue; confirm the inlet pressure at the header meets recommended valves and adjust the cylinder to provide blade tip clearance. Finally, check for a clogged strainer by removing and cleaning it.

EVAPCO ATW Specifications

General

Brand	EVAPCO
Model	ATW
Category	Accessories
Language	English

Summary

Introduction and Safety

Safety Precautions and Risks

Outlines critical warnings and risks for safe operation and maintenance procedures.

Installation and Storage

Installation Precautions

Details essential steps for safe and correct unit installation.

Start-Up and Building Codes

Initial and Seasonal Start-Up Checklist

Step-by-step guide for unit start-up and seasonal checks.

Maintenance Checklist and Procedures

Routine Maintenance Procedures

Lists scheduled maintenance tasks and their frequencies for regular upkeep.

Maintenance Schedule

A yearly calendar view of recommended maintenance tasks.

Shutdown and Basic Operation

Seasonal Shut-Down Checklist

Procedures for preparing the unit for seasonal shutdown or extended inactivity.

Cooler/Condenser Operation Sequence

Fan System Capacity Control Methods

Fan Motor Cycling

Two-Speed Motors

Variable Frequency Drives (VFDs)

Using VFDs for precise fan speed control and capacity adjustment.

Resonant Frequency Management

Identifying and mitigating harmful resonant frequencies with VFDs.

Water Treatment and Chemistry

Bleed-Off and Blowdown Control

Galvanized Steel Passivation

Initial treatment for galvanized components to prevent white rust.

Water Chemistry Parameters

Recommended chemical ranges for optimal performance and longevity.

Control of Biological Contamination

Strategies to prevent microbial growth and biofouling.

Cold Weather Operation and Protection

Freeze Protection for Recirculating Water

Methods to prevent freezing of water in the recirculating system.

Closed Circuit Cooler Coil Protection

Methods to prevent freezing of heat exchanger coils in closed circuit coolers.

Unit Accessories and Cold Weather Capacity Control

Cold Weather Capacity Control Methods

Strategies for capacity control in freezing temperatures to prevent ice.

Ice Management

Strategies to manage and minimize ice formation during operation.

Troubleshooting Fan and Motor Issues

Overamping Fan Motors

Diagnosing and resolving fan motor overcurrent issues.

Unusual Motor Noise

Identifying sources of and solutions for motor noise.

Incomplete Spray Pattern

Troubleshooting Pump, Valve, and Water Issues

Fan Noise, Louver Scaling, and Pump Issues

Makeup Valve and Overflow Conditions

Troubleshooting Level and Control Issues

Low Pan Water, Rusting, and Insulation

Electric Water Level Control Malfunction

Addressing problems with the electric level control system.

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