Cairox CK AC User manual

1/7 User Instructions CAIROX rev1 - 18/03/2021
www.cairox.com
USER INTRUCTIONS
CK AC/EC
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Before performing any installation, maintenance or removal work, please read these instructions carefully. The
manufacturer cannot be held responsible for any damage to persons and/or property if the instructions in this
manual are not followed.

2/7 User Instructions CAIROX CK AC / EC rev1 - 21/07/2022
SUMMARY
1BEFORE YOU START .......................................................................................................................................................3
2DESCRIPTION.................................................................................................................................................................3
2.1 APPLICATION.................................................................................................................................................................3
2.2 HANDLING INSTRUCTIONS............................................................................................................................................3
3INSTALLATION ...............................................................................................................................................................4
3.1 AC-MOTOR....................................................................................................................................................................4
3.2 EC-MOTOR ....................................................................................................................................................................4
3.3 ASSEMBLY INSTRUCTION ..............................................................................................................................................5
3.4 INSTALLATION INSTRUCTIONS......................................................................................................................................6
4OPERATION ................................................................................................................................................................... 7
5MAINTENANCE .............................................................................................................................................................. 7
6FAULT DETECTION .........................................................................................................................................................7
7WARRANTY ................................................................................................................................................................... 7

3/7 User Instructions CAIROX CK AC / EC rev1 - 21/07/2022
1BEFORE YOU START
This directions for use contain following products: CK AC and EC. Visit www.cairox.com for further information
about the product. This note must be supplied to the final customer.
2DESCRIPTION
CK is a circular in-line duct fan with backward curved impeller. The fan is equipped with external rotor induction
AC or EC motor with maintenance-free sealed Ball-bearings. The fanhousing are manufactured from galvanized
steel sheet.
2.1 APPLICATION
CK is accessible for the user, according to IEC 60335-2-40, to by themselves do the service and maintenance,
according to this Directions for use. But before this work the unit must be currentless. With reservation according
to IEC 60335-2-7.12. ” This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their safety.” ”Children should be supervised
to ensure that they do not play with the appliance.”
•The fan is used for transportation of ”clean” air, meaning not intended for fire-dangerous substances,
explosives, grinding dust, soot, etc.
•To achieve maximum lifetime for installations in damp or cold environments, the fan should be operating
continuously.
•The fan can be installed outside or in damp environments. Make sure that the fan house is equipped with
drainage.
•The fan is intended to be used at the highest voltage and frequency that’s stated on the label on the fan.
•The fan can be installed in any position.
2.2 HANDLING INSTRUCTIONS
•The fan must be transported in its packing until installation. This prevents transport damages, scratches
and the fan from getting dirty.
•Attention, look out for sharp edges.
•Avoid extreme heat or cold (temperature range for storage and transport.)

4/7 User Instructions CAIROX CK AC / EC rev1 - 21/07/2022
3INSTALLATION
•The fan must be installed according to the air direction label on the fan.
•The fan must be connected to duct or equipped with a safety grille.
•The fan should be installed in a safe way and make sure that no foreign objects are left behind.
•The fan should be installed in a way that makes service and maintenance easy. N.B.! Consider the weight
and size of the fan.
•The fan should be installed in a way that vibrations cannot be transferred to duct or building. To provide
this, use for example a flange.
•Electrical installations must be made by an authorized electrician.
•See Wiring diagram at the lid of the junction box.
•Electrical installation must be connected to a locally situated isolator switch or by a lockable main switch.
•Control that the fan is installed and connected electrically in the right way, grounded and with motor
protection.
•For single phase fans a residual current device i used (type A).
3.1 AC-MOTOR
•For speed regulation of AC motor a transformer or thyristor can be connected.
•The AC motor has a built-in thermal contact.
•The capacitor (only for AC motor) has finite lifetime and should be exchanged after 45.000 operation
hours (about 5 years of operation) to secure maximum function. Defective capacitor can cause damage.
3.2 EC-MOTOR
•Speed regulating of EC motor can be done with the built-in potentiometer, 0-10 V.
An external potentiometer can be connected to the terminal if necessary. The
internal potentiometer should then be disconnected.
•Some EC motors has tachometer output one pulse per revolution.
•EMC-COMPATIBLE INSTALLATION OF EXTERNAL CONTROL LINES: The control cable
must not be longer than 30 m. Screened control cables must be used when the cable
length is longer than 20 m. When using a shielded cable connect the shielding to one
side only, i.e. only to the device with the protective ground (keep cable short and
with as little inductance as possible!). Pay attention to sufficient distance from
power lines and motor wires to prevent interferences.
Attention! Ensure correct polarity! Never apply line voltage to analog inputs!
•The EC motor has electronically thermal-/overvoltage protection.

5/7 User Instructions CAIROX CK AC / EC rev1 - 21/07/2022
3.3 ASSEMBLY INSTRUCTION
Mounting bracket kit for easy suspension of CK contents:
1. 2 pcs mounting bracket
2. 4 pcs screws
The brackets can be mounted horizontal everywhere around the joint of the fan. For right distance between the
brackets, see the dimension table (B) and the distance from the joint to screw-hole (C).
Fan Size
A +- 2
B +- 2
C +- 2
100
277
185
18
125
277
185
15
150 B
299
210
18
150 C
323
248
17
160 B
299
210
18
160 C
323
248
17
200
323
248
18
250
323
248
18
315
350
275
17
1. Mark the measure of B on the fan for the placement of the mounting brackets.
2. Mark the measure of B on the fan for the placement of the mounting brackets.
3. Fasten the mounting brackets with the self-drilling screws.

6/7 User Instructions CAIROX CK AC / EC rev1 - 21/07/2022
3.4 INSTALLATION INSTRUCTIONS
Installation instructions for exhaust systems for duct fan, type CK.
Installation with duct clamps for duct fan CK.
Duct clamp, type MK is made of pre-galvanized steel and is rubber-lined to seal connection and absorb vibrations.
The clamp allows the fan to be easily removed for inspection and cleaning.
Available in sizes: Ø 80, 100, 125, 150, 160, 200, 250, 315, 355, 400, 500 and 630 mm.
1. Mark the measure of A on the wall or roof and then fasten the fan.
2. Put together the ducts and the fan.
3. Strap the duct clamps on each side of the fan with the screws.

7/7 User Instructions CAIROX CK AC / EC rev1 - 21/07/2022
4OPERATION
For technical data please see the product label. Before starting, make sure that:
•the current does not exceed more than +5% of what is stated on the label.
•the supplied voltage is within +6% to –10% of the rated voltage.
•no noise appears when starting the fan.
5MAINTENANCE
•Before service, maintenance, or repair, disconnect power and wait until the impeller has stopped.
•Attention, look out for sharp edges and corners.
•Consider the weight of the fan when removing or opening larger fans to avoid injury and damage.
•Attention! Temperatures up to 85°C can be present on the controller housing (only for EC motor).
•Waiting period of at least 3 minutes! (Only for EC motor) Because of internal capacitors, danger of death
exists even after switching off the device through directly touching the energized parts or due to parts
that have become energized due to faults. The controller housing may only be removed or opened when
the power line has been switched off and a period of three minutes has elapsed since switching it off.
•When cleaning and maintaining, the fan always must be secured when open, so it can’t fall down and
cause injury.
•The fan must be cleaned regularly, at least once a year to maintain the capacity and to avoid unbalance
which may cause unnecessary damage of the bearings.
•When cleaning the fan, high-pressure cleaning or strong dissolvent must not be used. Cleaning should be
done without displacing or damaging the impeller.
•The fan bearings are maintenance-free and should be replaced only when necessary.
•Notice the weight of the fan when closing after inspection/cleaning.
•Mount back all details in reverse order. Check that the fan is closed and locked before starting.
•Make sure that there is no noise from the fan.
6FAULT DETECTION
1. Make sure that the power is connected to the fan.
2. Disconnect the power and verify that the impeller is not blocked.
3. Check the thermal contact (for AC). If it is triggered the cause of overheating must be investigated and
taken care of. To restore the manual thermoprotector the power must be disconnected for a couple of
minutes. In case of automatic thermoprotector the resetting will be done automatically when the motor
has cooled down.
4. Make sure that the capacitor is connected according to the wiring diagram (for AC).
5. If the fan still does not work, the first thing to do is to replace the capacitor (for AC).
6. If the previous steps don’t solve the problem, contact your fan supplier.
7. If the fan is returned to the supplier, it must be cleaned, the motor cable must be undamaged, and a
detailed fault description must be enclosed.
7WARRANTY
The warranty is only valid under condition that the fan is used according to this “Directions for use” and a regular
maintenance has been made and record. The warrantor is responsible only for the operation if approved
accessories are used. The warranty does not cover product failures caused by accessories/equipment from other
manufacturers