Secoh EL Series - User Manual

Filter cover
Overall
cover
Filter
element
Truss head
screw
Bolt
Screw
(
B
)
Holder
cover
Shock
absorber
Nut
(
A
)
Periodic maintenance procedure
EL series
- Always disconnect the power before servicing. Failure to do
so could result in electrical shock, personal injury or death.
Fig. 1
Fig. 2
Fig.3
Fig. 4
Fig. 5
1 Filter element cleaning
- Undo the truss head screw and remove the filter cover
(
Ref. : Fig. 1
)
.
- Remove the filter element and shake out the dust by hand
(
Ref. : Fig. 2
)
. If it is heavily clogged, wash it with a neutral
detergent. Rinse with water and dry it in the shade.
- Reassemble the filter element back in place and press in the
filter cover.
- Fix the filter cover by the truss head screw.
2 Replacement of filter element, valve box,
diaphragm (note:holder cover is not present on some models.)
- Replace the filter element following the procedure in 1 Filter
element cleaning.
- Undo the four corner bolts and remove the overall cover. In
case the overall cover is hard to remove, insert a slotted
screwdriver in
(
A
) (
Ref. : Fig. 3
)
.
- Remove the shock absorber. Undo the screws
(
B
)
and
remove the holder cover
(
Ref. : Fig. 4
)
.
- Insert the magnet support jig in four corners between the
magnet and the core
(
Ref. : Fig. 5, 6
)
.
- Undo the screw
(
C
)
and remove the valve box of one side,
pinching the hose clamp
(
Ref. : Fig. 7
)
.
- Undo
(
D
)
and remove the diaphragm
(
Ref. : Fig. 8
)
.
Note :
(
D
)
of EL-60, EL-80-15, EL-120W : Nut
(
D
)
of EL-80-17, EL-100, EL-150, EL-200 : Bolt
- Set the new diaphragm to the magnet and fix them by
(
D
)
(
Ref. : Fig. 8
)
.
Note :
Use the new nut or bolt
(
D
)
in this repair kit.
Note the locating notch for reassembly
(
Ref. : Fig. 9
)
.
- Set the new valve box and fasten it with the four corner
screws
(
C
) (
Ref. : Fig. 7
)
.
- Replace the valve box, diaphragm holder and diaphragm of
the other side in the same way.
- Pull out the magnet support jig
(
Ref. : Fig. 5, 6
)
.
- Make sure that clearance between the magnet and the
solenoid of both sides is even.
WARNING
- Clean the filter element quarterly. A clogged filter element
can cause overheating or pump failure.
- 2 kits are required for EL-120W, 150, 200.
CAUTION
Parts name
Filter element
Diaphragm
Valve box
Bolt
Nut
Washer
Magnet support jig
Contents of EL series repair parts kit
Fig. 6
Magnet
support jig
Core
Magnet
qty
1
2
2
2
2
2
4

Summary

Periodic Maintenance Procedure

Filter Element Cleaning

Steps to clean the filter element by removing the cover and shaking out dust.

Replacement of Filter Element, Valve Box, Diaphragm

Detailed steps for replacing filter element, valve box, and diaphragm using repair parts.

Reset of Auto Stopper

Procedure to reset the auto-stopper, including safety warnings and slider adjustment.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

The SECOH EL series device is an air pump designed for various applications, likely including aeration in wastewater treatment, aquaculture, or other systems requiring a reliable air supply. The manual provides detailed instructions for its periodic maintenance and repair, emphasizing safety precautions throughout the process.

Function Description

The core function of the EL series device is to generate and deliver air. This is achieved through a diaphragm-based pumping mechanism. Air is drawn in through an inlet, compressed by the reciprocating motion of diaphragms driven by an electromagnetic system, and then expelled through an exhaust port. The device incorporates a filter element to ensure the cleanliness of the incoming air, a valve box to direct airflow, and an auto-stopper mechanism for safety and protection against diaphragm breakage.

Important Technical Specifications

The manual lists specific repair parts included in the EL series repair kit, indicating key components of the device:

• Filter element: 1 unit
• Diaphragm: 2 units
• Valve box: 2 units
• Bolt: 2 units
• Nut: 2 units
• Washer: 2 units
• Magnet support jig: 4 units

These quantities suggest a dual-diaphragm design, common in linear diaphragm air pumps for balanced operation and increased airflow. The mention of "2 kits required for EL-120W, 150, 200" indicates that larger models within the EL series have higher maintenance requirements or a more complex internal structure that necessitates additional parts. The specific models mentioned (EL-60, EL-80-15, EL-120W, EL-80-17, EL-100, EL-150, EL-200) also suggest a range of capacities, with the "W" likely denoting a "wide" or higher-capacity version. The distinction in fastener types (nut vs. bolt) for different models (e.g., EL-60, EL-80-15, EL-120W use a nut for diaphragm fixation, while EL-80-17, EL-100, EL-150, EL-200 use a bolt) highlights variations in design across the series.

Usage Features

The EL series is designed for continuous operation, but its performance relies heavily on proper maintenance. The auto-stopper mechanism is a critical safety and operational feature. If a diaphragm breaks, the magnet's abnormal amplitude causes a projection to hit a slider, interrupting the contact point and cutting off power. This prevents further damage to the device and ensures safety. The device's design, with an overall cover and internal components, suggests it is intended for installation in a protected environment, though the filter element is easily accessible for routine cleaning. The use of a magnet support jig during maintenance indicates a design that requires careful handling of magnetic components to ensure proper reassembly and alignment.

Maintenance Features

The manual provides comprehensive instructions for periodic maintenance, emphasizing ease of access for common tasks:

1. Filter Element Cleaning:

• Frequency: Quarterly.
• Procedure: Undo a truss head screw, remove the filter cover, and then remove the filter element. Dust can be shaken out, or for heavy clogging, the element can be washed with a neutral detergent, rinsed, and dried in the shade. Reassembly is the reverse process.
• Importance: A clogged filter element can lead to overheating and pump failure, highlighting its critical role in the device's longevity and performance.

2. Replacement of Filter Element, Valve Box, Diaphragm:

• Filter Element: Replaced as per the cleaning procedure.
• Overall Cover Removal: Undo four corner bolts. A slotted screwdriver can be used if the cover is difficult to remove.
• Internal Component Access: Remove the shock absorber, undo screws (B), and remove the holder cover.
• Magnet Support Jig: This specialized tool is inserted in four corners between the magnet and the core. This step is crucial for maintaining proper clearance and preventing damage during disassembly and reassembly of the diaphragm and valve box.
• Valve Box and Diaphragm Removal: Undo screw (C) and remove the valve box, pinching the hose clamp. Undo fastener (D) (nut or bolt depending on the model) and remove the diaphragm.
• Reassembly: Set the new diaphragm to the magnet and fix with fastener (D). Use new nuts or bolts from the repair kit. Note the locating notch for proper reassembly. Set the new valve box and fasten with four corner screws (C). Replace the valve box, diaphragm holder, and diaphragm on the other side similarly.
• Post-Assembly Check: Pull out the magnet support jig. Ensure that the clearance between the magnet and the solenoid on both sides is even. This step is vital for optimal performance and to prevent damage from magnet-solenoid contact.
• Connecting Exhaust Port: Connect the exhaust port of the valve box to the connecting pipe and tighten with the hose clamp.
• Holder Cover and Shock Absorber: Fasten the holder cover with four corner screws (B) and replace the shock absorber.
• Overall Cover Reinstallation: Insert the power cord rubber bushing into the location notch of the overall cover and fasten securely with nuts and bolts.
• Operation Confirmation: Connect power and confirm operation.

3. Reset of Auto Stopper:

• Safety Precaution: Disconnect power before servicing to prevent electric shock and personal injury.
• Procedure: If the diaphragm is broken, the magnet reciprocates with abnormal amplitude, causing the projection to hit the slider and interrupt power. To reset, insert a slotted screwdriver and push the slider. Set the slider at the position L1=L2.
• Importance: This mechanism protects the device from continuous operation with a broken diaphragm, preventing further damage.

Safety Warnings and Cautions:

• WARNING: Always disconnect power before servicing to prevent electric shock, personal injury, or death.
• CAUTION: Clean the filter element quarterly to prevent overheating and pump failure.
• WARNING: If the magnet contacts the solenoids during operation, it will cause damage, abnormal heat, and short-circuiting.
• DANGER: Do not touch live parts to avoid electric shock.
• CAUTION: Improper setting of the rubber bushing can result in electric shock and air leakage.
• DANGER: Disconnect power before resetting the auto-stopper to prevent electric shock and personal injury.

These detailed maintenance instructions and safety warnings underscore the importance of regular upkeep for the EL series device to ensure its safe, efficient, and long-lasting operation. The design facilitates component replacement and adjustment, making it a serviceable unit rather than a disposable one.

Secoh EL Series Specifications