Vents OKW User manual

OKW
OKW1
OKF
OKF1
Duct coolers
USER'S MANUAL

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www.ventilation-system.com
CONTENTS
Safety requirements..................................................................................................................................................................... 3
Purpose................................................................................................................................................................................................ 4
Delivery set........................................................................................................................................................................................ 4
Designation key.............................................................................................................................................................................. 4
Technical data.................................................................................................................................................................................. 4
Design and operating principle ........................................................................................................................................... 9
Mounting and set-up.................................................................................................................................................................. 10
Technical maintenance.............................................................................................................................................................. 11
Troubleshooting............................................................................................................................................................................. 12
Storage and transportation regulations.......................................................................................................................... 12
Manufacturer’s warranty........................................................................................................................................................... 13
Certificate of acceptance.......................................................................................................................................................... 15
Seller information.......................................................................................................................................................................... 15
Installation certificate.................................................................................................................................................................. 15
Warranty card................................................................................................................................................................................... 15
This user’s manual is a main operating document intended for technical, maintenance, and operating staff.
The manual contains information about purpose, technical details, operating principle, design, and installation of the OKW(1)/OKF(1) unit
and all its modifications.
Technical and maintenance staff must have theoretical and practical training in the field of ventilation systems and should be able to
work in accordance with workplace safety rules as well as construction norms and standards applicable in the territory of the country.

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THE PRODUCT MUST BE DISPOSED SEPARATELY AT THE END OF ITS SERVICE LIFE.
DO NOT DISPOSE THE UNIT AS UNSORTED DOMESTIC WASTE.
SAFETY REQUIREMENTS
All user's manual requirements as well as the provisions of all the applicable local and national
construction, electrical, and technical norms and standards must be observed when installing
and operating the unit.
Check the unit for any visible damages of the casing before starting installation. The casing
internals must be free of any foreign objects.
While mounting the unit, avoid compression of the casing!
Misuse of the unit and any unauthorized modifications are not allowed.
Do not expose the unit to adverse atmospheric agents (rain, sun, etc.).
Transported air must not contain any dust or other solid impurities, sticky substances, or fibrous
materials.
Do not use the unit in a hazardous or explosive environment containing spirits, gasoline,
insecticides, etc.
Do not sit on the unit and do not put objects on it.
The information in this user’s manual was correct at the time of the document’s preparation. The
Company reserves the right to modify the technical characteristics, design, or configuration of its
products at any time in order to incorporate the latest technological developments.

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DELIVERY SET
DESIGNATION KEY
PURPOSE
Name Number
Duct cooler 1 item
User’s manual 1 item
Packing box 1 item
    3
Number of cooling coil rows
Flange dimensions [width x height], mm
Modication
_ - standard;
1 - simplied
Cooler type
W - water cooler
F - direct expansion cooler
Designation key of the cooler
OK - duct cooler
TECHNICAL DATA
Each cooler is subjected to a pressure and a tightness test.
The cooler design is constantly being improved, so some models can slightly differ from those ones described in this manual.
The duct coolers are designed for supply air cooling in supply or air handling units integrated into rectangular ventilation systems.
The cooler is a component part and is not designed for independent operation.
Transported air must not contain any flammable or explosive mixtures, evaporation of chemicals, sticky substances, fibrous materials,
coarse dust, soot and oil particles or environments favourable for the formation of hazardous substances (toxic substances, dust,
pathogenic germs).
Duct water cooler OKW (OKW1):
Maximum operating pressure: 1.5 MPa (15 bar).
Direct expansion cooler OKF (OKF1):
Maximum operating pressure: 2.8 MPa (28 bar).

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W
B3
H
H1
H2
H3
B
B1
B2
ø9
80 113
L
129
425
385
H4
K
K
8 holes
Model Dimensions, mm
B B1 В2 B3 H H1 H2 H3 H4 L K Weight [kg]
OKW 400х200-3 400 420 440 470 200 220 240 295 124 56 G 3/4’’ 10,4
OKW 500х250-3 500 520 540 570 250 270 290 345 188 45 G 3/4’’ 12,8
OKW 500х300-3 500 520 540 570 300 320 340 395 252 56 G 3/4’’ 14,3
OKW 600х300-3 600 620 640 670 300 320 340 395 252 56 G 3/4’’ 16
OKW 600х350-3 600 620 640 670 350 370 390 445 268 56 G 3/4’’ 17,7
OKW 700х400-3 700 720 740 770 400 420 440 495 314 56 G 3/4’’ 21,9
OKW 800х500-3 800 820 840 870 500 520 540 595 442 56 G 3/4’’ 26,9
OKW 900х500-3 900 920 940 970 500 520 540 595 442 56 G 3/4’’ 31,5
OKW 1000х500-3 1000 1020 1040 1070 500 520 540 595 442 56 G 1’’ 32

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OKW(1)/OKF(1)
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F
B3
H
H1
H2
H3
B
B1
B2
ø9
80 115
L
135
425
385
H4
øD1
øD2
8 holes
Model Dimensions, mm
B B1 В2 B3 H H1 H2 H3 H4 L D1 D2 Weight [kg]
OKF 400х200-3 400 420 440 470 200 220 240 295 103 44 12 22 10,4
OKF 500х250-3 500 520 540 570 250 270 290 345 155 44 12 22 12,8
OKF 500х300-3 500 520 540 570 300 320 340 395 210 33 12 22 14,3
OKF 600х300-3 600 620 640 670 300 320 340 395 199 44 18 28 16
OKF 600х350-3 600 620 640 670 350 370 390 445 199 44 18 28 17,7
OKF 700х400-3 700 720 740 770 400 420 440 495 224 44 22 28 21,9
OKF 800х500-3 800 820 840 870 500 520 540 595 340 44 22 28 26,9
OKF 900х500-3 900 920 940 970 500 520 540 595 340 44 22 28 31,5
OKF 1000х500-3 1000 1020 1040 1070 500 520 540 595 325 44 22 28 32

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W1
H
H1
H2
B
B1
B2 100
350
H4
L
H3
73
K
K
Bolt М8
8 item.
Model Dimensions, mm
B B1 B2 H H1 H2 H3 H4 L K Weight [kg]
OKW1 400х200-3 400 420 580 200 220 270 124 70 56 G 3/4” 13,5
OKW1 500х250-3 500 520 680 250 270 320 188 102 45 G 3/4” 14
OKW1 500х300-3 500 520 680 300 320 370 252 70 56 G 3/4” 15
OKW1 600х300-3 600 620 780 300 320 370 252 134 56 G 3/4” 16
OKW1 600х350-3 600 620 780 350 370 420 268 229 56 G 3/4” 17
OKW1 700х400-3 700 720 880 400 420 470 314 196 56 G 3/4” 19
OKW1 800х500-3 800 820 980 500 520 570 442 324 56 G 3/4” 22
OKW1 900х500-3 900 920 1080 500 520 570 442 324 56 G 3/4” 23
OKW1 1000х500-3 1000 1020 1180 500 520 570 442 324 56 G 1” 24

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OKW(1)/OKF(1)
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F1
H
H1
H2
B
B1
B2 102
350
L
H3
79
Bolt М8
8 item
Model Dimensions, mm
B B1 B2 H H1 H2 H3 L D1 D2 Weight [kg]
OKF1 400х200-3 400 420 580 200 220 270 103 44 12 22 13,5
OKF1 500х250-3 500 520 680 250 270 320 155 44 12 22 14
OKF1 500х300-3 500 520 680 300 320 370 210 33 12 22 15
OKF1 600х300-3 600 620 780 300 320 370 199 44 18 28 16
OKF1 600х350-3 600 620 780 350 370 420 199 44 18 28 17
OKF1 700х400-3 700 720 880 400 420 470 224 44 22 28 19
OKF1 800х500-3 800 820 980 500 520 570 340 44 22 28 22
OKF1 900х500-3 900 920 1080 500 520 570 340 44 22 28 23
OKF1 1000х500-3 1000 1020 1180 500 520 570 325 44 22 28 24

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DESIGN AND OPERATING PRINCIPLE
The cooler casing is made of polymer coated steel, the tube collectors are made of copper and the heat exchanger surface is made
of aluminium plates. The cooler casing has a dismountable design that provides easy access to the heat exchanger and the droplet
separator. The cooling coils are available in 3 rows modification.
The internal operating medium of the OKF (OKF1) duct cooler is an evaporating refrigerant, i.e. R123, R134a, R152a, R404a, R407c, R410a,
R507, R12, R22.
The internal operating medium of the OKW (OKW1) duct cooler is water or antifreeze.
If necessary change the service side by turning the cooling coil through 180°. The OKF1 and OKW1 do not have this option. By default
the service side is on the right in the direction of the air flow.
Service side change
To attain the maximum cooling capacity the cooler must be connected on counter-flow basis
Inlet Outlet
Counterow connection Direct ow connection
Inlet
Outlet

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MOUNTING AND SETUP
The cooler is connected to the air duct with a flange connection
Connection of the cooler to the air duct
Outdoor installation of the cooler is allowed only if the refrigerant is an antifreeze (ethylene glycol solution). During mounting consider
the operating characteristics of the mixing unit actuator.
While mounting the cooler provide quick and easy dismantling of the heat exchanger, the drain pan and the drain pipe.
• The cooler can be installed only horizontally to enable condensate drainage.
• While mounting the cooler provide enough access for servicing and repair operations.
• The duct cooler may be installed upstream and downstream of the ventilation unit. If the cooler is installed downstream of the fan,
provide at least 1-1.5 m air duct between the cooler and the fan for air flow stabilization.
Prior to starting mounting check the tube, plates and the tube collector condition. Flanges of the system components are mounted with
galvanized bolts and M8 nuts.
For OKW1 and OKF1 the flanges of the system components are mounted with galvanized bolts and M8 nuts, pre-installed in the cooler.
Prior to mounting remove the bolts and after the mounting screw them back.
Prior to starting operation and after a long downtime fill the U-trap with water. Negative pressure coolers can be equipped with a U-trap
and a ball valve. Such U-trap must not be filled with water.

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CONDENSATE DRAINAGE
A drain pan with a drain pipe connected to a sewage system is designed for condensate drainage. While selecting the U-trap dimension
type consider the total fan pressure. The U-trap must ensure correct operation of the ventilation system.
Connect the drain pipe, the U-trap (not included in the standard delivery set) and the sewage system with metal, plastic or rubber
pipes. The pipe slope downwards must be at least 3°. Before starting the cooler fill the system with water and check that the U-trap is
always filled with water. Make sure that the water drainage is correct. Wrong connection to sewage system may result in condensate
accumulation inside the cooler.
The condensate drainage system is designed for operation at the ambient temperature above 0 °!
If the ambient temperature is below 0 °C, the condensate drainage system must be heat insulated and pre-heated.
H - U-trap height
K - drain height
P - total pressure in the fan
H, mm
100
200
260
55
105
140
600
1100
1400
K, mm P, P a
TECHNICAL MAINTENANCE
Maintenance means regular preventive measures during operation. The aluminium ribs and the droplet separator must be cleaned
at least once per year by vacuum cleaner or pressure water flushing. The cleaning periodicity depends on air pollution degree and
maintenance quality of the filters and equipment.
If the internal environment is clean enough, the cleaning may be performed more seldom, as required.
The U-trap maintenance includes regular control of water level and sufficient U-trap and drain pipes clearance.
WARNING! WHILE CLEANING THE RIBBED BATTERY BE CAREFUL
NOT TO DAMAGE THE RIBBED SURFACE.

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STORAGE AND TRANSPORTATION REGULATIONS
• Store the unit in the manufacturer’s original packaging box in a dry closed ventilated premise with temperature range
from +5 ˚С to +40 ˚С and relative humidity up to 70 %.
• Storage environment must not contain aggressive vapors and chemical mixtures provoking corrosion, insulation, and sealing
deformation.
• Use suitable hoist machinery for handling and storage operations to prevent possible damage to the unit.
• Follow the handling requirements applicable for the particular type of cargo.
• The unit can be carried in the original packaging by any mode of transport provided proper protection against precipitation and
mechanical damage. The unit must be transported only in the working position.
• Avoid sharp blows, scratches, or rough handling during loading and unloading.
• Prior to the initial power-up after transportation at low temperatures, allow the unit to warm up at operating temperature for at least
3-4 hours.
TROUBLESHOOTING
FAULTS AND FAULT HANDLING
Problem Possible reasons Fault handling
Refrigerant leakage The tube collectors are damaged.
Pipe connection is loose. Contact the Seller.
Low air flow The heat exchanger and/or the droplet separator are
soiled.
Clean the heat exchanger and the
droplet separator.
Water leakage The drainage system is soiled, damaged or
arranged not correctly.
Clean the drain line. Check the drain line
slope angle. Make sure that the U-trap is
filled with water and the drain pipes are
frost protected.
If troubleshooting steps have failed, contact the Seller of the product.
In case of faults not described in the table, contact the Seller for further information.

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MANUFACTURER’S WARRANTY
The product is in compliance with EU norms and standards on low voltage guidelines and electromagnetic compatibility. We hereby
declare that the product complies with the provisions of Electromagnetic Compatibility (EMC) Directive 2014/30/EU of the European
Parliament and of the Council, Low Voltage Directive (LVD) 2014/35/EU of the European Parliament and of the Council and CE-marking
Council Directive 93/68/EEC. This certificate is issued following test carried out on samples of the product referred to above.
The manufacturer hereby warrants normal operation of the unit for 24 months after the retail sale date provided the user's observance
of the transportation, storage, installation, and operation regulations. Should any malfunctions occur in the course of the unit operation
through the Manufacturer's fault during the guaranteed period of operation, the user is entitled to get all the faults eliminated by the
manufacturer by means of warranty repair at the factory free of charge. The warranty repair includes work specific to elimination of faults
in the unit operation to ensure its intended use by the user within the guaranteed period of operation. The faults are eliminated by means
of replacement or repair of the unit components or a specific part of such unit component.
The warranty repair does not include:
• routine technical maintenance
• unit installation/dismantling
• unit setup
To benefit from warranty repair, the user must provide the unit, the user's manual with the purchase date stamp, and the payment
paperwork certifying the purchase. The unit model must comply with the one stated in the user’s manual. Contact the Seller for warranty
service.
The manufacturer’s warranty does not apply to the following cases:
• User’s failure to submit the unit with the entire delivery package as stated in the user’s manual including submission with missing
component parts previously dismounted by the user.
• Mismatch of the unit model and the brand name with the information stated on the unit packaging and in the user's manual.
• User’s failure to ensure timely technical maintenance of the unit.
• External damage to the unit casing (excluding external modifications as required for installation) and internal components caused
by the user.
• Redesign or engineering changes to the unit.
• Replacement and use of any assemblies, parts and components not approved by the manufacturer.
• Unit misuse.
• Violation of the unit installation regulations by the user.
• Violation of the unit control regulations by the user.
• Unit connection to power mains with a voltage different from the one stated in the user's manual.
• Unit breakdown due to voltage surges in power mains.
• Discretionary repair of the unit by the user.
• Unit repair by any persons without the manufacturer’s authorization.
• Expiration of the unit warranty period.
• Violation of the unit transportation regulations by the user.
• Violation of the unit storage regulations by the user.
• Wrongful actions against the unit committed by third parties.
• Unit breakdown due to circumstances of insuperable force (fire, flood, earthquake, war, hostilities of any kind, blockades).
• Missing seals if provided by the user’s manual.
• Failure to submit the user’s manual with the unit purchase date stamp.
• Missing payment paperwork certifying the unit purchase.
FOLLOWING THE REGULATIONS STIPULATED HEREIN WILL ENSURE A LONG AND
TROUBLEFREE OPERATION OF THE UNIT
USER’S WARRANTY CLAIMS SHALL BE SUBJECT TO REVIEW ONLY UPON
PRESENTATION OF THE UNIT, THE PAYMENT DOCUMENT AND THE USER’S MANUAL
WITH THE PURCHASE DATE STAMP

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CERTIFICATE OF ACCEPTANCE
Unit Type Duct coolers
Model
Serial Number
Manufacture Date
Quality Inspector’s
Stamp
SELLER INFORMATION
Seller
Seller’s Stamp
Address
Phone Number
E-mail
Purchase Date
This is to certify acceptance of the complete unit delivery with the user’s manual. The warranty terms are
acknowledged and accepted.
Customer’s Signature
INSTALLATION CERTIFICATE
The _____________________________________ unit is installed pursuant to the requirements stated
in the present user's manual.
Installation Stamp
Company name
Address
Phone Number
Installation
Technician’s Full Name
Installation Date: Signature:
The unit has been installed in accordance with the provisions of all the applicable local and national construction,
electrical and technical codes and standards. The unit operates normally as intended by the manufacturer.
Signature:
WARRANTY CARD
Unit Type Duct coolers
Seller’s Stamp
Model
Serial Number
Manufacture Date
Purchase Date
Warranty Period
Seller

V63EN-05