Vents NKP Series User manual

USER’S MANUAL
DUCT HEATER FOR SUPPLY AIR PREHEATING
WITH EXTERNAL CONTROL
SERIES NKP
NKP-125
NKP-160
NKP-200

2
CONTENTS
Safety requirements 3
Purpose 5
Delivery set 5
Designation key 5
Technical data 6
Design and operating logic 6
Mounting and set-up 7
Connection to power mains 8
Maintenance 8
Storage and transportation regulations 9
Manufacturer's warranty 9
Acceptance certicate 10
Seller information 10
Installation certificate 10
Warranty card 10

3
This user’s manual consisting of the technical details, operating instructions and technical specication covers the installation
and mounting of the duct heater for supply air pre-heating (hereinafter the unit, as mentioned in the «Safety Requirements»
and «Manufacturer’s Warranty» sections as well as in warnings and information blocks).
SAFETY REQUIREMENTS
• Read the user’s manual carefully prior to installing and operating the unit.
• Fulfil the user’s manual requirements as well as the provisions of all the applicable local and national construction,
electrical and technical norms and standards.
• The warnings contained in the user’s manual must be considered most seriously since they contain vital personal safety
information.
• Failure to follow the rules and safety precautions noted in this user’s manual may result in an injury or unit damage.
• After a careful reading of the manual, keep it for the entire service life of the unit.
• While transferring the unit control the user’s manual must be turned over to the receiving operator.
Symbol legend:
WARNING!
DO NOT!
UNIT MOUNTING AND OPERATION SAFETY PRECAUTIONS
• Disconnect the unit from power mains
prior to any installation operations. • The unit must be grounded!
• Do not lay the power cable of the
unit in close proximity to heating
equipment.
• While installing the unit follow the
safety regulations specific to the use
of electric tools.
• Do not change the power cable length
at your own discretion.
• Do not bend the power cable.
• Avoid damaging the power cable.
• Do not put any foreign objects on the
power cable.
• Do not operate the unit outside the
temperature range stated in the user’s
manual.
• Do not operate the unit in aggressive
or explosive environments.
• Do not use damaged equipment or
cables when connecting the unit to
power mains.
• Unpack the unit with care.
• Do not touch the unit controls with
wet hands.
• Do not carry out the installation and
maintenance operations with wet
hands.
• Do not wash the unit with water.
• Protect the electric parts of the unit
against ingress of water.

4
• Do not allow children to operate the
unit.
• Disconnect the unit from power mains
prior to any technical maintenance.
• Do not store any explosive or highly
flammable substances in close proximity
to the unit.
• When the unit generates unusual
sounds, odour or emits smoke
disconnect it from power supply and
contact the Seller.
• Do not open the unit during operation.
• Do not direct the air flow produced by
the unit towards open flame or ignition
sources.
• Do not block the air duct when the unit
is switched on.
• In case of continuous operation of the
unit periodically check the security of
mounting.
• Do not sit on the unit and avoid placing
foreign objects on it.
• Use the unit only for its intended
purpose.

5
PURPOSE
The heater is designed for integration into a ventilation system and joint operation with an air handling unit equipped with
a control system regulating the heater operation.
The heater maintains the duct air temperature at a point that prevents the heat exchanger freezing.
THE UNIT MAY NOT BE OPERATED BY CHILDREN OR PERSONS WITH REDUCED
PHYSICAL, MENTAL OR SENSORY CAPACITIES, OR LACKING THE APPROPRIATE
TRAINING.
THE UNIT MUST BE INSTALLED AND CONNECTED ONLY BY PROPERLY QUALIFIED
PERSONNEL AFTER THE APPROPRIATE BRIEFING.
THE CHOICE OF UNIT INSTALLATION LOCATION MUST PREVENT UNAUTHORIZED
ACCESS BY UNATTENDED CHILDREN.
DELIVERY SET
Heater 1 item
Connecting cable with 1 item
User's manual 1 item
Packing box 1 item
DESIGNATION KEY
NKP X-X-X
Connecting air duct diameter [mm]
125
160
200
Unit type
NKP duct heater for supply air pre-heating
Heater power consumption [kW]
0,6
0,8
1,2
1,7
2,0
Phase
1 - single-phase

6
TECHNICAL DATA
The heater is rated for indoor application with the ambient temperature ranging from -30°C up to +40°C and relative
humidity up to 80%.
The heater is rated for connection to single-phase ac 230 V/50 (60) Hz.
The recommended minimum air flow speed in the air duct is 1.5 m/s.
The heater is rated as a class I electric appliance.
Ingress Protection (IP) rating from solid objects and liquids IP 40.
The heater design is regularly improved, so some models may slightly differ from those ones described in this manual.
L1
H
L
B
ØD
Model
Technical data Dimensions [mm ]
Weight
[kg]
Power
consumption of
electric heating
elements [kW]
Current
consumption
[A]
Ø D В H L L1
NKP 125-0.6-1 0,6 2,6
NKP 125-0.8-1 0,8 3,5 124 155 251 306 190 2,1
NKP 125-1.2-1 1,2 5,2
NKP 160-0,8-1 0.8 3.5
NKP 160-1.2-1 1,2 5,2
NKP 160-1.7-1 1,7 7,4 159 175 293 306 190 2,5
NKP 160-2.0-1 2,0 8,7
NKP 200-1.2-1 1,2 5,2
NKP 200-1.7-1 1,7 7,4 199 195 337 306 190 2,8
NKP 200-2.0-1 2,0 8,7
DESIGN AND OPERATING LOGIC
Control box
Air ow direction
DB-9F connector
Electric cable gland
Electric heating element
Heat insulation
Casing
The control box is rigidly fixed to the heater casing and covered
with a detachable cover.
The control box incorporates:
• fasteners for the electric heating element;
• electric components for connection to power supply;
• ground screw clamp;
• manual reset thermal switch TK-90;
• automatic reset thermal switch TK-50;
The electric cable gland for power cable as well as the connector
for connection to the air handling unit are located on the front
panel of the control box.
The tubular electric heating element is incorporated inside of
the heater casing.
The casing, the connecting box and the heater cover are made
of galvanized steel.
The heater casing is heat-insulated with 20 mm mineral wool
layer.

7
MOUNTING AND SETUP
INSTALLATION SHALL ONLY BE PERFORMED BY A PROFESSIONAL ELECTRICIAN
QUALIFIED FOR UNASSISTED OPERATIONS WITH ELECTRICAL INSTALLATIONS AND
POSSESSING THE REQUIRED TOOLS AND MATERIALS.
FULFIL THE USER’S MANUAL REQUIREMENTS AS WELL AS THE PROVISIONS OF ALL
THE APPLICABLE LOCAL AND NATIONAL CONSTRUCTION, ELECTRICAL AND TECHNICAL
NORMS AND STANDARDS.
THE HEATER MUST BE GROUNDED!
THE INSTALLATION PLACE MUST PROVIDE SUFFICIENT SERVICE ACCESS.
Air duct connection to the heater
The heater is designed for inline mounting in the air duct both
horizontally and vertically.
Heater connection to the air handling unit
Connect the heater and the air handling unit using the cable
with DB-9M connectors through DB-9F external connectors.
The external connector of the heater must be connected
to the external connector of the air handling unit prior to
connection of the heater and the unit to power mains!
ВIn case of horizontal mounting position the control box cover
must be directed upwards only.
The maximum deviation angle is 90°.
The control box cover may not be positioned downwards!

8
CONNECTION TO POWER MAINS
DISCONNECT THE UNIT FROM POWER SUPPLY PRIOR TO ANY ELECTRIC INSTALLATION
OPERATIONS.
INSTALLATION SHALL ONLY BE PERFORMED BY A PROFESSIONAL ELECTRICIAN AFTER
CAREFUL STUDY OF THE PRESENT USER’S MANUAL.
THE RATED ELECTRICAL PARAMETERS ARE STATED ON THE RATING PLATE.
ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED AND WILL VOID
THE WARRANTY.
Heater connection to the air handling unit
The connection must be completed prior to connection of
the heater and the air handling unit to power mains!
The electric heater an the air handling unit must be connected
via the cable with the prewired connectors DB-9F.
Heater connection to power mains
Connect the heater to ac single-phase 230 V / 50 (60) Hz
power mains using a pre-wired power cable with a Euro Plug
XP.
8 9
External connector DB-9F
Heating
signal Deactivated
1 2 3456
TK-50 TK-90
7
to the unit
Design. Name Type
TK-50 Contacts of manual reset thermal switch with
response temperature +50 °C N0
TK-90 Contacts of manual reset thermal switch with
response temperature +90 °C N0
Heating
signal Heater control triac input signal VAC
230 VAC
ELECTRIC SHOCK HAZARD
1 2 3
PE NL
Power input 230 VAC
MAINTENANCE
DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE ANY MAINTENANCE OPERATION
WITH THE UNIT.
AVOID WATER SPLASHES ON THE UNIT! DO NOT USE AGGRESSIVE SOLVENTS AND
SHARP OBJECT FOR CLEANING.
The heater maintenance includes:
• Inspection of screw connections as well as rivet and welded
joints.
• Inspection of tightening of ground screw clamps and electric
connections.
• Inspection of the wire terminal connections.
• Cleaning of the electric heating elements of dust and dirt.

9
STORAGE AND TRANSPORTATION REGULATIONS
Store the unit in the manufacturer’s original packing box in a dry ventilated premise at ambient temperatures from +5°C up to + 40°C.
Storage environment must not contain aggressive vapours 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 packing by any mode of transport provided proper protection against precipitation and
mechanical damage.
Avoid sharp blows, scratches or roughhandling during loading and unloading.
MANUFACTURER’S WARRANTY
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, mounting 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 elimination of faults by the manufacturer by means of warranty repair at the factory free of charge.
The warranty repair shall include 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
document 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 packing 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.
• User’s violation of the unit installation regulations.
• User’s violation of the unit control regulations.
• Unit connection to the power mains with a voltage different from the one stated in the user’s manual.
• Unit breakdown due to voltage surges in the 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.
• User’s violation of the unit transportation regulations.
• User’s violation of the unit storage regulations.
• 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 document certifying the unit purchase.
FOLLOWING THE REGULATIONS STIPULATED HEREIN WILL ENSURE A LONG AND
TROUBLEFREE OPERATION OF THE UNIT.
USERS’ WARRANTY CLAIMS SHALL BE SUBJECT TO REVIEW ONLY UPON
PRESENTATION OFTHE UNIT,THE PAYMENT DOCUMENTANDTHE USER’S MANUAL
WITH THE PURCHASE DATE STAMP.

10
ACCEPTANCE CERTIFICATE
Unit Type Duct heater for supply air pre-heating
Model NKP-
Serial Number
Manufacture Date
Is compliant with the technical specifications and is recognized as serviceable.
"We hereby declare that the product complies with the essential protection requirements of Electromagnetic Council
Directive 2004/108/EC, 89/336/EEC and Low Voltage Directive 2006/95/EC, 73/23/EEC and CE-marking Directive
93/68/EEC on the approximation of the laws of the Member States relating to electromagnetic compatibility.
This certicate is issued following test carried out on samples of the product referred to above."
Quality Inspector's
Stamp
SELLER INFORMATION
Seller
Address
Phone Number
E-mail
Purchase Date
This is to certify acceptance of the complete heater delivery with the user’s manual. The warranty
terms are acknowledged and accepted.
Customer’s Signature Seller’s Stamp
INSTALLATION CERTIFICATE
The heater has been connected to power mains pursuant to the requirements stated in the
present user’s manual.
Company Name
Address
Phone Number
Installation
Technician's Full Name
Installation Date: Signature:
The heater has been installed in accordance with the provisions of all the applicable local and
national construction, electrical and technical codes and standards. The heater operates normally
as intended by the manufacturer.
Signature:
Installation Company
Stamp

11
WARRANTY CARD
Unit Type Duct heater for supply air pre-heating
Model NKP-
Serial Number
Manufacture Date
Purchase Date
Warranty Period
Seller
Seller’s Stamp

F115EN-02