EVAPCO LPT 8812 - User Manual

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Bulletin 113-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

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

EUROPEAN

OPERATION AND MAINTENANCE INSTRUCTIONS

For EVAPCO Induced Draft and Forced Draft Cooling Towers

For EVAPCO Authorized Parts and Service,

Contact Your Local Mr. GoodTower

®

Service Provider

or the EVAPCO Plant Nearest You

www.evapco.eu

AT UAT LSTE LPT PMTQ

Table of Contents

Questions and Answers

C
Crystal MedinaAug 19, 2025
What to do if the makeup valve will not shut off in EVAPCO LPT 8812 Accessories?
- M
  merrittdonaldSep 12, 2025
  If the makeup valve won't shut off in your EVAPCO Accessories, it might be due to several reasons: First, high water pressure could be the culprit. Mechanical makeup valves need water pressure between 140 and 340 kPa to function correctly. If it's too high, install a pressure reducing valve. Second, the solenoid might be clogged with debris, so clean it out. Third, inspect the float or valve for damage and replace if necessary. Fourth, check the ball for leaks and replace it if needed.
J
Justin MccarthyAug 22, 2025
Why is stainless steel rusting on my EVAPCO LPT 8812 Accessories?
- N
  Nathaniel PattonAug 22, 2025
  If you notice rust on your stainless steel EVAPCO Accessories, it's usually not the stainless steel itself corroding. Often, it's foreign material like welding slag on the surface, especially around coil connections, the cold water basin near support steel, and field-erected platforms. Remove these rust spots by cleaning the surface regularly with a stainless steel cleaner and a Scotch-Brite pad.
A
Amber GonzalezAug 27, 2025
Why is water constantly blowing out of the overflow connection in EVAPCO LPT 8812 Accessories?
- R
  Ralph WaltonAug 27, 2025
  If water is constantly blowing out of the overflow connection in your EVAPCO Accessories, especially on forced draft units, it's likely due to positive pressure in the casing section. To resolve this, pipe the overflow with a P-trap to an appropriate drain. Also, verify the actual operating level against the recommended levels in the O&M manual.
V
velezloganAug 30, 2025
How to fix unusual motor noise in EVAPCO Accessories?
- P
  Phyllis StephensAug 30, 2025
  If you're hearing unusual motor noise in your EVAPCO Accessories, here's what you can do: * First, stop the motor and try to restart it. If it doesn't restart and seems to be single phasing, check the wiring, controls, and motor. * Second, check the motor connections against the wiring diagram. * Third, check the lubrication and replace any bad bearings. * Fourth, check the voltage and current of all three lines, correcting if necessary. * Fifth, check and correct bracket fits or the bearing. * Sixth, rebalance, reinstall, or replace the fan.
C
christinescottSep 2, 2025
Why is the cooling tower cold water basin overflowing in my EVAPCO LPT 8812?
- J
  Jamie KnightSep 2, 2025
  If the cooling tower cold water basin is overflowing in your EVAPCO Accessories, it could be due to a problem with the make-up line. Refer to the Makeup Valve or Electronic Water Level section for guidance. Alternatively, if it's a multi-cell unit, there might be an elevation issue. Ensure that multi-cell units are installed level to one another, as uneven installation can cause overflowing in one cell.
J
John RogersSep 4, 2025
How to clean scaled inlet louvers on AT units of EVAPCO LPT 8812?
- D
  Dawn JohnsonSep 4, 2025
  If you observe scaled inlet louvers on your AT units of EVAPCO Accessories, note that this isn't necessarily a sign of a problem with the unit or water treatment. Avoid using a power washer or wire brush to remove the scale, as this could damage the louvers. Instead, remove the louver assemblies and soak them in the cold water basin of the unit. The water treatment chemicals will neutralize and dissolve the scale buildup. The soaking time depends on the severity of the scale.
C
Crystal SmithSep 7, 2025
What to do if there is an incomplete spray pattern in EVAPCO Accessories?
- A
  Aaron RhodesSep 7, 2025
  If you notice an incomplete spray pattern in your EVAPCO Accessories, try these steps: * First, remove and clean the nozzles, and flush the water distribution system. * Second, visually verify the pump rotor rotation by turning the pump off and then on, and verify the amp draw. * Third, confirm that the inlet pressure at the header meets the recommended values. * Fourth, remove the strainer and clean it.
J
Jim MurraySep 10, 2025
How to fix low pan water level in EVAPCO Accessories?
- M
  Matthew HammondSep 10, 2025
  If the pan water level is low in your EVAPCO Accessories, it could be due to the electronic water level control float bulb not being set correctly. Refer to the EWLC Section for instructions. Alternatively, adjust the float ball up or down to achieve the proper water level. Note that the float ball is set to the operating level at the factory.
J
Jason BakerSep 13, 2025
How to reduce fan noise in EVAPCO LPT 8812 Accessories?
- M
  Michael SuarezSep 13, 2025
  To address fan noise in EVAPCO Accessories, especially in induced draft models, check if the blade is rubbing inside the fan cylinder. If it is, adjust the cylinder to provide blade tip clearance.
D
David WrightNov 15, 2025
How to troubleshoot overamping fan motors in EVAPCO Accessories?
- J
  Jason GrayNov 16, 2025
  To address overamping fan motors in EVAPCO Accessories: * First, for a forced draft unit, ensure the pump is running and water flows over the coil. The motor may over-amp if the pump is off and the unit wasn't designed for dry operation. * Second, for ducted forced draft units, ensure the design ESP matches the actual ESP. * Third, check that the pump rotation is correct. Incorrect rotation reduces water flow and static pressure. * Fourth, check the basin water level against the recommended level, keeping in mind that air density affects AMP readings. * Fifth, check the voltage across all three legs of the motor. * Sixth, ensure the motor is wired per the diagram and connections are tight. * Seventh, confirm the fan rotates correctly, switching leads if necessary. * Eighth...

EVAPCO LPT 8812 Specifications

General

Brand	EVAPCO
Model	LPT 8812
Category	Accessories
Language	English

Summary

Safety Precautions; Remaining Risks

Installation Precautions

Initial and Seasonal Start-Up

Maintenance Checklist

Seasonal Shut-Down Checklist

Basic Cooling Tower Sequence of Operation

Fan System

Fan Motor Bearings

Maintenance and lubrication of fan motor bearings.

Fan Shaft Ball Bearings

Lubrication of fan shaft ball bearings for different unit types.

Fan Belt Adjustment

Fan System Capacity Control

Variable Frequency Drives

Utilizing VFDs for precise fan speed and capacity control.

Resonant Frequency Identification

Recirculated Water System Maintenance

Cold Water Basin

Water Make Up Valve

Drift Eliminator Maintenance

Water Distribution Systems

Bleed-Off Valve Checks

Water Treatment and Chemistry

Galvanized Steel Passivation

Process for passivating galvanized steel and water chemistry requirements.

Water Chemistry Parameters

Biological Contamination Control

Cold Weather Operation

Cold Weather Capacity Control Methods

Overview of capacity control methods for cold weather operation.

Induced Draft Unit Capacity Control

Specific capacity control strategies for induced draft units in cold weather.

Forced Draft Unit Capacity Control

Specific capacity control strategies for forced draft units in cold weather.

Ice Management Strategies

Strategies for managing ice formation in extreme ambient conditions.

Induced Draft Unit Ice Management

Managing ice buildup in induced draft units.

Forced Draft Unit Ice Management

Why defrost cycles are not recommended for forced draft units.

Troubleshooting

Overamping Fan Motors

Identifying causes and remedies for fan motors over-amping.

Electric Water Level Control Faults

Replacement Parts

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