Login

Privacy Policy (GDPR)
Authorization
Not registered yet? Take advantages of registration:
Products saving in a binding to the projects
Product consultation from our experts - Online
Registration
Signup
By using this form, you confirm that you have read the site terms of use Terms of use and completely accept the terms of use

VENTS NKP 125-1,2-1 A21 V.2


Heater for heat exchanger freeze protection.
Connected air duct diameter – 125 mm.
Heater power – 1.2 kW.

  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Designation key
  • Compatibility table
  • Electric heater power selection diagram
Description
Description
APPLICATION  
  • Duct electric heater for heat exchanger freeze protection by means of supply air preheating and supply air duct temperature maintaining at a point that ensures heat exchanger freezing protection.
  • Compatible with round Ø125, 150, 160, 200, 250 and 315 mm air ducts.
DESIGN  
  • The casing and the control box are made of galvanized steel and the heating elements are made of stainless steel.
  • The heater casing is extra heat insulated with 20 mm non-flammable mineral wool layer.
  • The heater spigots are rubber sealed for airtight connection to the air ducts.
  • The NKP A21 V.2 duct heaters are equipped with a power cable and a control cable for connection to a controller of an air handling unit.
  • Air temperature is controlled with a triac power controller that switches the maximum load on/off.
  • Load is commutated with a semiconductor (triac).
  • The heaters are equipped with overheat protection thermostats:
    ⏵self-resetting overheat protection thermostat actuated at +60 °C.
    ⏵emergency overheat protection thermostat actuated at +90 °C.
MOUNTING  
  • The heater design ensures its connection to round air ducts by means of the clamps from the delivery set.
  • The arrow on the heater casing must match the air flow direction in the system.
  • The heater is controlled by the ventilation unit through the cable supplied and already connected to the heater at the factory.
  • The control box cover must be directed upwards with the maximum deviation angle 90°.
  • The control box cover must not be directed downwards.
Characteristics
Characteristics
Parameter NKP 125-1,2-1 A21 V.2
Measurement unit
Minimum air capacity 90 m³/h
Current 5.2 A
Power 1200 W
Heating electric preheating -
Duct for round air ducts -
Connection diameter 125 mm
Capacity diagram
Capacity diagram
  • Selection method:
  • Air flow:
  • Pressure:
Operating point
  • Air flow: --
  • Pressure: ---
Files archieve
Downloads
Select document type
  • Advertising and printing products
  • Certificates
  • Technical documentation
Name
"NKP A21 V.2" product description 10-2021 (pdf 473.53Kb)
"NKP A21 V.2" user's manual 09-2021 (V249EN-01) (pdf 1.37Mb)
Download high quality image "NKP A21 V.2" (psd 2.26Mb)
Download image "NKP A21 V.2" for your website (png 477.82Kb)
Dimensions
Characteristics
VENTS NKP 125-1,2-1 A21 V.2
Parameter Value Measurement unit
∅D 125 mm
B 164 mm
H 249 mm
L 306 mm
L1 192 mm
Designation key
Designation key
Series Connected air duct diameter [mm] - Heater power, kW - Phase Options
NKP 125; 150; 160; 200; 250; 315 0.6; 0.8; 1.2; 1.7; 2.0; 3.0 1: single-phase А21 V.2: compatible with А21 automation, without a DB-9M connector
Compatibility table
Compatibility table
Heater model (connected air duct diameter)  
NKP 125 А21 V.2 VUT/VUE VB EC A21
NKP 150 А21 V.2 VUT/VUE VB EC A21
NKP 160 А21 V.2 VUT/VUE VB EC A21
NKP 200 А21 V.2 VUT/VUE VB EC A21
NKP 250 А21 V.2 VUT/VUE VB EC A21
NKP 315 А21 V.2 AirVents with a 315 mm spigot and an A21 automation
Electric heater power selection diagram
Electric heater power selection diagram

How to use electric heater diagrams

  • Selection of the NKP A21 V.2 heater model compatible with VUT 350 VB EC A21 air handling unit. The rated winter outside air temperature is -15 °С. The rated air flow is 220 m³/h. Starting from the rated winter outside air temperature (1) draw a horizontal line till the air flow axis (2). The NKP A21 V.2 heater with heating capacity 1200 W is able to provide efficient heat exchanger freeze protection.
  • The NKP 160-1,2-1 A21 V.2 with the diameter matching the spigot diameter of the VUT 350 VB EC A21 air handling unit is a suitable model.
Share your opinion

Questionnaire
Basic parameter for domestic fan selection