Secoh JDK-150 User manual

INSTRUCTION MANUAL
FOR
ELECTROMAGNETIC AIR PUMP
MODEL ：JDK-150/200/250
300/400/500
SECOH SHANGHAI MEC LTD.
We thank you for your purchasing our air pump. Prior to use of it, it is kindly
requested that the instructions in the columns of WARNING in this manual
should be read carefully to understand the equipment well. Then, keep this
manual available in case of need.
JDK-150/200/250
JDK-300/400/500

Specifications
※The air capacity, power in the specifications shown are typical values in service at
operating pressure, and so these are not guaranteed values.
TO THE CUSTOMER:
Fill in the date purchased as well as the name of distributor or
service shop for convenience when ordering repair.
Date purchased
Name of distributor/
Service shop
Tel.
201409-03
Model
JDK-150
JDK-200
JDK-250
JDK-300
JDK-400
JDK-500
Rated Voltage
V
AC220-240
Frequency
Hz
50
Oper. Press.
kPa
20.0
Air Capacity
L/min
150
200
250
300
400
500
Power
W
110-120
170-190
230-250
220-240
350-370
470-490
Outlet Dia.
mm
O.D.26
（hard vinyl chloride pipe VP20）
O.D.27
（hard vinyl chloride pipe VP20）
Mass
kg
Approx. 10.0
Approx. 18.0
Standard Accessories
Hose with relief valve (with hose band)

WARNING&CAUTION
●Prior to operation, read "Instructions" to ensure that
the air pump is put in operation correctly.
●Be sure to follow the instructions herein described,
especially, the following safety instructions.
High potential risks resulting from
improper handling, as it can cause
death or serious injuries.
High potential risks resulting from
improper handling, as in some
cases it can cause serious injuries.
●Each time after reading this manual, keep it in a
designated place so that the user has access to it at
any time.
●In applications of using purification tank, make sure to
carry out the maintenance management contract.
●Short of daily maintenance may cause failure of the
pump or early breakage.
●This appliance mounting and electric installation is
only by professionals.Children and persons with
reduced physical, sensory or mental capabilities or
lack of experience and knowledge should not play
and use with the appliance.If the supply cord is
damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to
avoid a hazard.

CONTENTS
1.Name of Parts ･･･････････････････････････････････････････
1
2.Instructions
3
2-1 Prior to Operation ･･････････････････････････････････
3
2-2 Storage and Transfer ････････････････････････････････
3
2-3 Installations
4
1) Instructions to Location of theAir pump ･･･････････････
4
2) Instructions to Electric Installation ････････････････････
5
3) Instructions to Mounting ････････････････････････････
6
4) Instructions to Piping ･･･････････････････････････････
7
5) Instructions to Operation ････････････････････････････
9
3.Daily Maintenance ･･･････････････････････････････････････
10
4.After-Sale Servicing
11
4-1 Repair and Its Order ････････････････････････････････
11
4-2 Replacement Parts ･････････････････････････････････
12

- 1 -
1.Name Of Parts
JDK-150/200/250
Power supply cord
Earth Screw
Truss head screw
Filter cover
Filter cover packing
Filter
Inlet(4 holes)
Outlet
Relief valve
Hose Clamp 20A
Hose Clamp
Hose Clamp 13A

- 2 -
JDK-300/400/500
Filter cover
Filter cover packing
Truss head screw
Filter
Inlet(8 holes)
Outlet
Selectable outlet
Power supply cord
Earth screw

- 3 -
○When transferring the air pump. Carry the body by both hands.
●Do not carry the air pump by holding the filter cover, as
the body slipped of the filter cover may drop on your
foot.
●Do not carry the air pump by holding the power cord,
which will cut the wires in it. It may cause heat or
ignition. Wear gloves not to be burnt. The body is
heated during operation.
2.Instructions
2-1 Prior to Operation
○This air pump is not designed to be mounted on the vehicle.
So, do not install it on the vehicle.
○In applications where the stop of air supply can never
be allowed , such as fish raising, a spare air pump should
be provided.
●Make sure to operate the spare air pump every other month to confirm its proper
operation.
2-2 Storage and Transfer
○Do not store the air pump in a place where the
ambient temperature is below -10℃. The magnet
inside the pump is weakened, and as the result, the
equipment will not perform as intended.
○This air pump is designed only for air feeding.
●Since the fluid flowed in runs through the charged part,
inflow of any flammable gas or liquid could cause ignition,
electric shock or short-circuit.
○This air pump is designed only for the voltage of 220-240V ( 50Hz).
●Using undesignated power supply cord could cause electric shock or short
circuit.
○Do not transform the pump.
○Nonprofessionals do not disassemble or repair the
pump.

- 4 -
○Do not store the air pump in any areas sunlit directly
or at high temperature, which will speed up the
natural deterioration of Rubber parts inside the air
pump.
2-3 Installations
1) Instruction to Location of the Air pump
○Installation of the air pump (including wiring and piping)
should be done by our distributor or a specialist.
●Improper installation done by yourself could cause air
leak, electric shock or fire.
○Do not install the air pump in a place where it can be
submerged by rain or snow.
●Electric leakage or shock will be caused by water leaked
in the charged part of the submerged air pump.
●
○Set the air pump above the water level.
●Setting of the air pump below the water level will cause
counterflow of water from siphon phenomenon, when
stopping the air pump. Such counterflow of water will
cause the charged part to be immersed in water, and
result in electric leakage, electric shock or short circuit.
○Do not install the air pump in a place where any flammable
gas can be leaked.
●Ignition could be caused by the accumulation of the
leaked gas around the air pump.
○Set the air pump away from places like bed room,
reception room, etc. Noise may bother in the quiet
nighttime.
●When the surrounding is quiet at night, the operating
sound may be a nuisance.

- 5 -
○Set the air pump in the shade and well ventilated place.
●The lives of the diaphragms and valves in the air pump may
be shortened under quite high temperature caused by the
heat of the sunlight.
○Do not set the air pump in a humid , air-blocked, dusty
or place full of rubbish.
●The lives of the diaphragms and valves of the air pump
may be shortened by the overheat of the air pump due to
the less suction of air through easily blocked filter in a dusty
place.
○Do not install the pump right under ventilators which may cause suction of oily air.
●Contacting with oil will speed up the deterioration of rubber parts like diaphragms,
valves, etc.
○Set the air pump in a place where working space for maintenance can be secured.
2) Instruction to Electric Installation
○A Breaker with Ground-Fault Protection should be set in
the wiring of power supply.
●No provision of Breaker with Ground-Fault Protection will
be cause of electric shock.
●If outdoor use, the appliance shall be supplied through a
residual current device (RCD) having a rated operating
current not exceeding 30 mA.
○When installing the air pump outdoors, be sure to use a
waterproof receptacle.
●Exposing of the changed part to rain water will be cause of
electric leakage or electric shock.
○This product should be grounded with an appropriate
grounding wire.
●Do not connect the grounding wire with gas pipe, downcomer,
lighting rod or telephone line.
●Improper grounding or no grounding can result in a risk of
electric shock.

- 6 -
3) Instruction to Mounting
○The exclusive mount for air pump installation made of concrete should be arranged.
The mount should be away from the foundation for at least 150mm and its height
should be min 100mm higher than the foundation.
●Noise may be caused by vibration of the air pump mounted on an unstable place
such as concrete blocks, shelf etc.
○Install the air pump on a horizontal mount taken a level after the concrete has
been completely dry.
●Setting the air pump before concrete has been completely dry can embed it
therein.
●The load caused by setting the air pump in a declining position may shorten the
life of the parts.
○A ventilation fan should be put in a fence for water, noise proofing to keep
temperature inside the fence below 40℃.
JDK-150/200/250
○When mounting the air pump at a place got wet heavily,
provide a roof or a fence to keep the air pump from
water.
●Water taken in the air pump may enter the charged
parts, which could cause electric leakage, electric
shock or short circuit.
●Ordinary rain will not enter the air pump.
Over 240mm
Over 180mm
Over 100mm
Hose Clamp 20A
Hose Clamp 13A
In application of VP13 pipe
In application of VP20 pipe

- 7 -
JDK-300/400/500
4) Instruction to Piping
○The pipe to discharge air should be hard vinyl chloride
pipe VP13(ID13mm×OD18mm) or VP20(ID20mm×
OD26mm).
○To confirm the dimension of the air pipe, please read
the instruction manual of purification tank first.
●If the air pipe is VP13, using the hose intactly.
●If the air pipe is VP20, cut off the part of VP13 along
the cut line.
○Air piping should be as short and straight as possible.
●The total length of air piping should be shorter than
10m(each bend is regard as1.5m). The longer air
piping, the larger air pipe diameter should be picked.
○Make sure that no particles of soil,sand,etc are left in
the in the piping under its construction.
In application of VP20 pipe
Cut line
Cut it off
VP13 VP20
Over 100mm
Over 335mm
Over 240mm
In application of VP13 pipe

- 8 -
●Extra pressure caused by foreign objects in the piping
will be applied on the air pump, which will result in
overheat of the air pump. It may shorten the life of
diaphragms and valves.
○Connect the air pump to the air piping with an
accessory hose, and secure the connection with a
hose band.
●Adjust the locations of the air pump outlet and air
piping so that no forcible loads are applied to the
hose.
○The function of the relief valve is to prevent the
breakage of air pump and piping when pressure
exceed the limit. To prevent the mishandling to it, pay
attention to the following instructions when installing.
●Set the valve vertical to the ground.
●The relief valve is set to open when exceed the range
of working pressure and locked with screw. Loosening
the screw will change the setting pressure. So do not
adjust the screw.
●Once the relief valve is open, the discharged air
volume will decrease and noise will rise. Shut down
the air pump right away and clean up the blocked
area.
●Do not let it fall or being striken.Great impact could
cause breakage or mishandling of the relief valve.
●The accessory relief valve is designed only for the
electromagnetic air pump of our company. Do not use
it out of our pump.
Fix screw

- 9 -
5) Instruction to Operation
○Do not break or transform the power cord.
●Breaking or working of the cord will be cause of
electric shock or fire.
●Heavy loading, heating or pulling will be cause of
breakage.
○Clean the dust on electric source plug at least once a year.
Plug in completely.
●Dust on the power plug or incomplete plugging in will be
cause of electric shock.
○Do not touch the cords with wet hand.
●Touching with wet hand will be cause of electric shock.
○Pull off the power cord by holding the power plug.
●Pulling the power cord by itself will cause a part of the
core wire to be broken, and lead to heating or
ignition.
○Do not wash the air pump with water directly.
●Washing can cause leakage, electric shock or short
circuit.
○Do not clean the pump with naphtha, paint thinner
etc.
●It may damage the powder-coated surface or plastics.

- 10 -
3. Daily Maintenance
●CLEAN THE FILTER
EVERY FOUR MONTHS.
１）Undo the truss head screw. Remove the filter cover.
２）Take out the filter and slap down the dust and dirt by hand.
If it is heavily contaminated, wash it by rubbing using
neutral detergent. Then, wash with water and dry it in the
shade.
３）Please confirm whether there is any dust or dirt blocking the
inlets. If yes, please clear it up.
４）Reassemble the filter back in place, and press in the filter
cover.Secure the filter cover with truss head screw.
○Make sure that the filter cover packings are not dislocated
or broken before installation.
●If the filter cover packings are broken, replace them in time,
or it could be the cause of leaking rain water in or
abnormal noise.
●DAILY CHECKS
○Is air blowing out properly?
○Isn't the air pump making abnormal noise or vibrations?
○Is the temperature of the air pump not abnormally high?
○Is the power cord or plug not damaged, swelled or discolored?
※If any irregularity is found, read “REPAIR AND ITS ORDER”.
○Prior to maintenance servicing, pull off the power cord to
stop operation of the air pump.
○Since dust could enter the air pump and cause accidents
such as leakage or short circuit, be sure to do cleaning
regularly.
○Keeping running over four months without cleaning-up could cause block of the
filter or inlet, which will lead to air circulation problem. Low discharged air
volume could decrease the life of diaphragms of valves, and worsen the water
quality in purification tank.

- 11 -
4. After-sale Servicing
4-1 Repair and its Order
○When "fail" is doubted, read the following and check it again.
State
Checks
●The air pump does not
work.
●Is the plug inserted in the socket correctly?
●Doesn't the power supply give out?
●Does the breaker disconnect?
●The discharged air volume
decrease.
●Abnormal temperature rise.
●The air pump sometimes
operate and sometimes
doesn't.
●Is the piping or diffuser pipe not blocked?
●Doesn't the valve in the piping shut?
●Is the filter not blocked?
●Noise is abnormal.
●Is the air pump not in touch with the surrounding
articles?
○If the failure is found even after checking the above points, remove the plug to
stop operation. Then, call the distributor or service shop with the following
information.
Air pump name: Electromagnetic air pump
Model: JDK-○○○(Refer to name plate attached)
Manufacture code: ○○○○○○
Failure state: As detailed as possible.
○Do not continue the operation as it runs abnormally.
●Continue running will cause electric leakage, electric shock or short circuit.
○Do not proceed with repairing by yourself.
●Improper repairing will be the cause of electric leakage, electric shock or short
circuit.

- 12 -
4-2 Replacement Parts
○Do not use any parts for replacement other than genuine parts.
●Parts other than genuine parts may have different sizes, so the air pump will not
only work with bad performance but also cause to be broken.
○In order to ensure long time service of the air pump, it is recommended that
diaphragm and valve should be replaced at least once a year.
●Diaphragms and valves are consumption parts. So the deterioration
characteristic of rubber could cause the bad performance or breakage of the air
pump.
○The replacement parts will be available for seven(7) years after production stop of
the pump.
- Customer Service Office -
SECOH SHANGHAI MEC LTD.
Head Office : No.160 Xuanchun Road, Xuanqiao Town, Pudong New Area,
Shanghai,China
Tel: [phone]
Fax: [phone]