Showa Denki CRN Series User manual

035A(E) − D
CRNSeries
Original instructions
CRNSeries
Operation Manual & Cautions

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Cautionary information indications used in this manual .................
Meanings of symbol marks used in this manual .............................
Using the Mistresa in a safe manner ..............................................
Items to check upon product delivery and storage .........................
Internal component names and layout ...........................................
Product labels .................................................................................
Ambient conditions in the area of installation .................................
Suction port cautions ......................................................................
Product installation .........................................................................
Piping ..............................................................................................
Operating cautions .........................................................................
Maintenance and inspections .........................................................
Warranty .........................................................................................
Contact information ........................................................................
Specifications .................................................................................
[Contents]
Thank you for purchasing the Mistresa from Showa Denki. This manual explains the
specifications for the [Mistresa units from CRN Series].
Please read the operating instructions and cautionary information carefully to ensure that the
Mistresa is used in a safe and efficient manner. Special attention should be given to
cautionary information which bears the [ ] mark.
Keep this manual in a secure location
where it can be easily accessed.

−１−
All warnings and instructions
must be strictly observed.
A prohibited action
(Target is unspecified)
Failing to heed the
instructions could
result in accidents
Follow instructions
carefully
Disassembly prohibited
Electrical shock hazardElectrical ground required
1. Cautionary information indications used in
this manual
2. Meanings of symbol marks used in this manual
"[ ] WARNING" mark indicates cautionary information that, if not
heeded, could result in serious injury or death, and could also
pose a fire hazard.
A "[ ] CAUTION" mark indicates cautionary information that, if not
heeded, could result in injury and/or equipment damage.

−２−
WARNING Do not install in hazardous locations
3. Using the Mistresa in a safe manner
The Mistresa does not have a pressure and explosion-proof construction.
Operating the Mistresa in areas where explosive gases, etc., are present
could result in an explosion in the event of an electric motor burnout.
CAUTION Cautionary notes on using the CRN Series Mistresa
WARNING Fire and electrical shock prevention
WARNING Maintenance and inspections prohibited
during impeller rotation
The Mistresa wiring work must be performed by a qualified electrician, and must
conform to the relevant electrical engineering standards and
internal wiring standards.
Always wait at least 2 minutes after a power OFF before performing
filter replacement work or inspections (to allow the impeller's inertial
rotation to come to a complete stop).
WARNING Fire and explosion prevention
Never allow explosive gases , organic solvents , or flames to be sucked
into the suction port.
Mistresa from CRN Series use high efficiency motors (IE3) that are designed to
have lower motor winding resistances than the standard motors (IE1 or equivalent)
so as to reduce losses. Since this design feature calls for a higher starting current,
replacing the motor of your existing Showa Denki’s Mistresa may
require to change the circuit breakers, thermal relays, and other relevant
devices.
This product collects oil mist generated by equipment such as machine tools
to ensure and maintain a comfortable working environment. Do not use the
product for any purpose other than the originally intended.

−３−
4. Items to check upon product delivery and storage
Although all our products are thoroughly tested and inspected prior to
shipment, the customer should nonetheless check the following items when
taking delivery of the Mistresa.
If necessary, store the Mistresa in ambient conditions below.
・Indoor avoiding direct sun beams
・Temperature between 0°C to 40°C
・Humidity between 10% to 90% (No condensation)
Follow the instructions below if it is necessary to stop the operation or store
the Mistresa for 3 months or longer.
(1) Storing Mistresa in the original packaging
Store the Mistresa in a dry area indoor where the temperature does not
change much.
• Verify that the delivered product (model, etc.) is the same as
that which was ordered.
• Verify that the product has not been damaged or deformed,
etc., during shipment.
• Verify that all the product accessories are present.
Operation & Cautions Manual
Primary filter
(for replacements)
Drain tube 2.5m
Hose band
(for drain tube)
Anti-vibration pads
Duct companion flange
Packing
(for duct companion flange)
Bolts + nuts
(for securing the duct companion flange)
Crimp terminals
(1 spare)
Standard Accessories
1 copy
1 piece
2 pieces
2 pieces
4 pieces
1 piece
1 sheet
4 sets
7 sets
* Two duct companion flanges come with the product – one for
installing the product and the other for connecting with the
next machine. The packings (for duct companion flanges) for
CRN Series are affixed to the duct companion flanges.
*

Duct companion flange
Box case
Cap
Clamp
Impeller
Motor
Outer cylinder
Suction drain tube
Main body
Discharge drain tube
Side cover
Elbow
De-mister box
Box de-mister
−４−
5. Internal component names and layout
(2) Not operating the Mistresa after installation
Keep the Mistresa free from "significant vibration" and "heat" from
other machines and equipment.
It is recommended that the Mistresa be covered with a plastic sheet or the
like to keep it free from water, oil and dust.
6. Product labels
(1) Product nameplate(motor nameplate)………At main body or base frame
The nameplate label contains the following information: product model,
rated voltage, rated frequency, rated current, insulation class, max. static
pressure, max. airflow rate, manufacture No., etc.
Note 1: The "ratings" are the operating limit values.
Note 2: The static pressure is the force which a gas flow applies to faces
which are parallel to that flow.

−５−
(2) Direction of air flow………Top face of main body
Suction side Discharge side
(3) Ground connection………Inside the terminal box
The " " mark indicates a ground connection.
Be sure that the mark-indicated part is securely grounded.
7. Ambient conditions in the area of installation
CAUTION
Ambient temperature
Intake temperature
Relative humidity
Altitude
Overvoltage category
Material group
Level of contamination
CRN Series
0°C to 50°C
50°C or lower
10% to 90%
1,000 meters or lower
III
III
3
・Install the Mistresa indoor.
・Make sure that the installation floor has a sufficient bearing
strength commensurate with the machine weight.
・Install the Mistresa where it stays away from strong vibration
or impact.
・Install the Mistresa on a level, flat surface.
Resulting in motor burnout and deterioration of the components.
Be sure to use within the range described following.

−６−
NEVER allow the following items to flow into the product - Explosive
gases, organic solvent, sparks, burning cigarettes and so forth. Otherwise, an
explosion, fire or product damage could result.
* Class 3 petroleum mist having the flash point higher than 150°C may flow
into the CRN Series Mistresa provided that the suction temperature of the
mist is 50°C or lower. Be absolutely sure to use the burnout prevention
terminals A and B (white leads) in the operation circuit so that the motor
would not experience an excessive temperature.
* Note that some mist substances may deteriorate the packings and filters.
WARNING
8. Suction port cautions
9. Product installation
(1) Installation environment
CAUTION
①This product must be installed indoors only.
②Do not install in an environment where explosive gases, etc., may be
present.
(2) Installation method
CAUTION
①Install in a horizontal(level) manner to evenly distribute the weight
of the drain pipe discharge and the anti-vibration pads.
②When installing the product
on top of another machine,
etc., secure it with bolts to
prevent shifting due to
vibration.
③Leave a gap at the securing
bolts to allow the anti-
vibration pads to function
properly (See Fig.1).
Fig.1
As viewed from "A"
2 to 3mm Double nut
Gap
Anti-vibration pad
Welded bolt

−７−
④The liquid seal surface should
be 300mm or farther below
the drain pipe in order to
allow drain pipe discharge.
An optional floor stand
with a height of 600mm is
available (see Fig.2) (For
drain piping details, see
page 8, item (3) "Drain
tube piping").
⑤ Leave a 500mm margin of
space at all sides of the
product to permit filter
replacements, maintenance,
and inspections.
Screw size
M3.5
Tightening torque
0.87N·m (max0.96N·m)
(3) Power supply connection
WARNING
①Be sure that the power supply conforms to the rated voltage and rated
frequency requirements.
• When using inverter controlled operation, protect the motor by
incorporating the motor burnout prevention terminals "A" and "B"
in the inverter's control circuit.
In addition, if it is inverter operation at different voltage (more
than 380V), you will need a motorinsulation strengthening.
• Permissible voltage fluctuation range:
Continuous…Rated voltage within ±5%
Momentary…Rated voltage within ±10%
②Please connect the ground wire sure.
③When using crimp terminals, either cover the crimp area with an
insulation tube, or use insulated type crimp terminals.
Showa
３００ｍ ｍ
Fig.2
A

−８−
④For the electrical installation and wiring, be sure to use the cord lock
installed on the terminal box.
Procedure
:
1. Select the bush commensurate with the cord from the attached
bushes.
2. Put the cord through the cord lock.
3. Tighten the fastener band to secure the cord in place. Check that
the cord is securely tightened.
(4) Using the burnout prevention terminals
The CRN Series Mistresa have a heat-sensitive thermal protector at the
motor winding. This auto reset thermal protector operates as follows.
When the motor winding temperature rises excessively high, the relay
contacts open. When the temperature comes back down to a certain
temperature, the contacts automatically close again. Connect the thermal
protector with the terminals A and B for burnout prevention.
By connecting this terminal in series with the operating circuit of the
electromagnetic switch (with thermal relay), to prevent motor burnout.
CAUTION
①Be sure to connect the "A" and "B" terminals to the operation circuit
in order to protect the motor.
② Use the prescribed or lower contact rating (115V AC, 18A / 230V
AC, 13A / 24V DC, 18A).
Installation nut Main body
Bush S Bush M
Fastener band
Bush symbol
S
M
None
Applicable cord diameter (mm)
6.0 to 8.0
8.0 to 10.0
10.0 to 12.0

−９−
THRMC
THRMC
③ When the thermal relay is tripped, correct the cause, then press the
[RESET] button.
④The thermal relay may be erroneously tripped if the Mistresa is operated
in an intermittent manner. In this case, change the thermal relay.
a) Connection example for burnout prevention terminals "A" and "B"
Use either an electromagnetic switch or an electromagnetic switch
with over-current protection (thermal relay).
b) Connection example when using the optional switch with built-in
3SW thermal and a 3m cable)
Power supply Power supply
When using
an electromagnetic
switch
Terminal box
Terminal box
Thermal protector
Thermal protector
Switch
ON OFF
MC
(cable 3m)
}

−10−
10. Piping
(1) Duct hose material
Because the life of the duct hose will vary according to the type of mist
being sucked in, the use of an oil-resistant duct hose is recommended.
(2) Intake duct piping
①A flexible duct (optional item) should be used to facilitate easy duct
maintenance and vibration resistance.
②The duct should be somewhat longer than strictly necessary (slight
length surplus), but it must not sag when connected.
③Use the duct companion flange (accessory item) to facilitate easy
connection.
④ Positioning the intake port too close
to the mist generation source could
result in large amounts of mist,
cutting chips, and dust to be sucked
in, causing blow leakage and
accelerated clogging of the filters and
demister. Either provide an adequate
distance (approx. 500mm) between
the mist generation source and the
intake port, or install an impact plate
to prevent clogging from sucked-in
mist, cutting chips, and dust.
OK example OK OK
Mist generation source
Mist generation source
NG example NG
Mist generation source
Sagging (drain will accumulate here)
Approx. 500mm
Workpiece
Impact plate
Cutting tool

−11−
(3) Drain tube piping
① Be sure to [liquid seal] the suction drain tube. Otherwise, the
suction drain tube sucks air through its end, causing the drain to flow
back but not drain. This in turn could lead to premature clogging of
the next step filter.
②Do not connect the suction drain tube with the discharge drain tube.
③ Make sure that the
discharge drain tube is
[open to atmosphere].
Otherwise, it does not
drain well, possibly
causing the drain to
remain inside the main
body.
④Use a plug or a similar
element to close the drain
tube that is not connected
to the drain system.
11. Operating cautions
(1) In order to prevent fires, never allow explosive gases, organic solvents,
sparks, or burning cigarettes to be sucked into the suction port.
(2) The optional chip separator should be used when operating the Mistresa
in environments where large amounts of chips, dust, and high-concentration
mist are present.
(3) In environments where large amounts of oily mist (non-water-soluble)
are being sucked in, or where the sucked in mist particulate is small, etc.,
either the optional general-purpose after-filter or the
high-performance after-filter should be used to compensate for
changes in the collection efficiency due to these operating conditions,
and to prevent blow leakage and re-dispersion. Additional optional parts
are required to install the after-filter.
Inlet Side
300mm
300mm
Connection
Atmosphere
open
Outlet Side
Liquid-Seal

−12−
(4) The optional high-performance after-filter should be used when
operating the Mistresa in environments with small particulate matter
such as oily smoke, etc., and where the mist particulate is small and
present in high concentrations. Moreover, the optional inner-filter should
also be used to increase the after-filter life.
(5) For the CRN Series Mistresa, use care so as not to let the filter
(de-mister) clogged to choke itself up (a state where no air flows).
Otherwise, since the air flow cools the integrated air-cooled motor,
choking up causes the motor not to cool down sufficiently, possibly
leading to burnout.
Box de-mister Aluminum 12 to 24 months YES Absent1
Part Name
Material
Inspection/Replacement
Schedule
Washable
YES/NO Status
Quantity Spare Part
12. Maintenance and inspections
(1) Periodic inspections
An inspection should be performed every 3 months to check for
abnormal vibration and sounds. The insulation condition should be
checked once per year.
(2) Demister inspection/replacement schedule
CAUTION
To prevent injuries, always wear rubber gloves, etc., when inspecting
the demisters.

To put the cap back, put the cap
guide into the guide slot.
Otherwise, improper installation
of the cap could lead to oil leak.
Drain line inspection
Unclamp the box de-mister.
Remove the cap.
Lift the box de-mister upwards to
take it out.
To inspect the drain line, unclamp
the box de-mister. Lift the box
de-mister upwards to take it out.
−13−
(3) Demister inspection procedure
Be sure to verify that the power switch is OFF before beginning the
filter replacement procedure. During the replacement procedure, place a
placard on the power switch which says "Maintenance In Progress.
Do not turn the power switch ON".
CRN Series
Box de-mister inspection
(Reusable after washing)
【CAUTION】
1 2
3 4

−14−
CAUTION
(4) Demister washing
①Washing method
Demisters which have a "washable"
status can be cleaned by air-blowing
them, or by soaking them with a
neutral detergent until clean.
Demister
13. Warranty
(1) Scope of warranty
In the event of a product failure which occurs within the warranty
period, repairs shall be made free of charge, provided that the product
was used in accordance with the instructions given in the operation
manual, and on the product labels.
In the event that the customer has installed this product in other existing
equipment, this warranty does not cover the cost of removing and
re-installing this product from and to that equipment. Nor does this
warranty cover costs for work and transport, etc., which are associated
with those procedures. Moreover, customer losses related to equipment
and operation, and any other indirect losses are also outside the scope of
this warranty.
(2) Warranty period
This warranty shall extend for a period of 12 months from the date of
delivery.
(3) As a general rule, a repair fee shall be charged under the following
circumstances, even if still under warranty.
① When a product failure or damage was caused by incorrect product
handling (failure to observe the operation manual instructions and affixed
label information), or by unauthorized repairs or modifications.
②When a product failure or damage was caused by transport or
dropping, etc., after the product has been purchased.

−15−
③ When a product failure or damage was caused by a natural disaster
such as a fire, earthquake, storm/flood, lightning, etc., or by
abnormal voltage, or usage with an incorrect power supply (voltage,
frequency), etc.
④When a product failure or damage was caused by repairs or
modifications (new holes drilled in the product, etc.) by any party
other than Showa Denki.
⑤ When a product failure or damage was caused by using parts other
than those specified by Showa Denki.⑥ When a product failure or
damage was caused by the introduction of foreign matter into the
product.
⑦ Product aging related discoloration, scratches, and natural wear of
consumable parts.
(4) Showa Denki shall not be liable for any customer damages incurred due
to a malfunction of this product.
14. Contact information
(1) Technical inquiries regarding this product should be directed to the
following office.
(2) Inquiries regarding product faults and requests for repairs, etc., should be
directed to the Oversea Sales Department. The contact information for
this Group is given on the back cover of this manual. When contacting the
Oversea Sales Department, please have the following product information
in hand: The product "TYPE" (indicated on the affixed nameplate label),
and the manufacture No.
●
Showa Denki Co., Ltd.,
Daito Factory.
TEL [phone]
FAX [phone]

−16−
15. Specifications
Max
Average
*1 Refer to the delivery specifications to verify voltages other than those shown above.
*2 Operating Condition：Full
Load Measuring Method：According to clause1.7.4.2 of Machinery Directive 2006/42/EC
Type
Power supply
Output kW
Frequency Hz
Current A
Noise
1 meter from machine
dB(A)
Weight kg
CRN
− H04B − CE
0.4
50/60
2.0/2.0/2.0
62/66
61/65
31
CRN
− H07B − CE
0.75
50/60
3.0/2.8/2.8
68/72
67/70
41
CRN
− H15B − CE
1.5
50/60
5.1/6.8/6.8
73/78
72/75
74
3-phase, 50Hz, 200V / 60Hz, 200V / 60Hz, 220V
*1
*2

memo

http://www.showadenki.co.jp
CAD data is available on this website
Showa Denki Co., Ltd.
1-25 Shinden Kitamachi, Daito City, Osaka 574-0052
TEL [phone] FAX [phone]
TEL [phone] FAX [phone]
Oversea Sales Department
SHOWA DENKI (Thailand) Co., Ltd.
1-25 Shinden Kitamachi, Daito City, Osaka 574-0052
No1/46 Soi2 Grand De Ville, Soi Supapong 1 (Soi Srinakarin 42), SriNakarin Road Nongbon, Pravet Bangkok, Thailand 10250