Pentair AURORA Edwards 80 Bedienungsanleitung

Edwards Model 20 / Model 80

Pump Ma

1-1

General 1

Introduction

The Edwards Model 20and Model 80 pumps(Figure 1-1) are standard-duty high-speed gear-driven

positive-displacement rotary pumpswith gear-type rotors. The pumpsare self-priming.

Edwards rotary pumps are available in many configurations. While they may look alike,

there may be significant differences from one pump to another. Differences include

construction material, sealing method, rotor type, etc.

Figure 1-1. Edwards Model 20 & Model 80 Pumps

2-1

Maintenance 2

Edwards rotary pumps are available in many configurations. While they may look alike,

there may be significant differences from one pump to another. Differences include con-

struction material, sealing method, rotor type, etc. This manual covers only one config-

uration, which is defined by a model number and a serial number. Check the name plate

on the pump to make certain the model number is 20-420 and the serial number is

________________. If the numbers do not match, contact Edwards - Pentair Water.

Most pump repairs can be performed by maintenance personnel using normally avail-

able tools.

Consumable Materials

Cleaning materials, lubricants, and other products needed during pump maintenance

are listed in Table 2-1.

Do not perform maintenance using this manual if the model number on the

pump is not 20-420 or the serial number is not ________________. Performing

maintenance using the wrong manual could result in pump failure or personal

injury.

Table 2-1. Consumable Materials

Item Nomenclature Specification Common Name

1 Lint-Free Cloth MIL-C-85043

2 “Dry” Cleaning Solvent Acetone, Brake

Cleaner

3 Emery Cloth 220 Grit 3M, Anderson,

Sandvik, Mirka

4 Anti-Seize Compound “Nev’r Seize”

5 Red Loctite PermaLoc HH-120

6 High-Tack Gasket Spray Loctite, Permatex

2-2

Model 20 / Model 80 Pumps

Lubrication

To ensure a long service life, the pump should be lubricated routinely with approved

grease (7, Table 2-1). If the pump is operating under normal loads and temperatures,

use the intervals defined in Table 2-2. If the pump is operating at over 180°F, contact

Edwards - Pentair Water for recommended lubrication interval for your application.

Troubleshooting

Table 2-3 provides assistance in diagnosing and correcting malfunctions that may occur

during normal operation.

7 General Purpose Grease MIL-G-18709

NLGI #2

Chevron Ulti-Plex,

Shell Retina LC

8 Lapping Compound D51804, 180 Grit

Silicon Carbide

Felpro “Clover”

Brand

Ta b l e 2 - 2 . Lubrication Schedule

Item Interval Amount of Grease

Bearings 6,000 Hours 0.25 Ounce

Timing Gears 6,000 Hours 1.00 Ounce

Table 2-3. Troubleshooting

Trouble Probable Cause Remedial Action

1. Pump does

not turn

1a. Seized pump. 1a. Repair or replace pump.

1b. Faulty or misaligned

coupling.

1b. Replace or realign

coupling.

1c. Damaged or missing

shaft key.

1c. Replace key.

2. Excessive

Noise

2a. Loose or misaligned

coupling.

2a. Tighten, align, or replace

coupling.

2b. Cavitation. 2b. Check suction piping with

a vacuum gauge. Gauge

should read less than 10-

in. Hg in most cases.

Contact Edwar ds for the

exact reading for your

application.

Table 2-1. Consumable Materials (Continued)

Item Nomenclature Specification Common Name

Zerk fittings do not

have check balls.

This prevents bear-

ings from being

over-greased.

Excess grease will

run out of the fit-

ting when pump is

in operation.

The pump has

heat-treated steel

timing gears,

which can be very

noisy when oper-

ated above 900

rpm. This is a nor-

mal condition, and

does not require

maintenance

action.

2-3

Maintenance

Removal

1. Before removing pump, refer to troubleshooting chart (Table 2-3) to determine if

the problem is actually the pump.

2. Ensure adequate clearance exists for removal of pump. Disassemble adjacent com-

ponents as required for adequate working clearance.

3. Before removal, clean exterior parts to remove accumulated dirt, grease, or foreign

material.

4. Apply tags to identify parts of similar configuration to ensure correct installation.

2c. Worn or damaged

bearing(s).

2c. Repair or replace pump.

3. Excessive

vibration

3a. Loose or misaligned

coupling.

3a. Tighten, align, or replace

coupling.

3b. Cavitation. 3b. Check suction piping with

a vacuum gauge. Gauge

should read less than 10-

in. Hg in most cases.

Contact Edwards for the

exact reading for your

application.

3c. Worn or damaged

bearing(s).

3c. Repair or replace pump.

4. Reduced flow 4a. Clogged suction screen. 4a. Clean or replace screen.

4b. Cavitation. 4b. Check suction piping with

a vacuum gauge. Gauge

should read less than 10-

in. Hg in most cases.

Contact Edwards for the

exact reading for your

application.

4c. Pump liners and/or

rotors worn or damaged.

4c. Repair or replace pump.

4d. Low pump speed 4d. Increase pump speed.

To avoid injury, always de-energize the input driver and lock-out or red-tag the

controller. Let the pump cool before removing.

Table 2-3. Troubleshooting (Continued)

Trouble Probable Cause Remedial Action

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