User`s manual "NK...U" ( PDF 2,79Mb )
Contents
1. MOUNTING AND SETUP AFTER TRANSPORTATION OR STORAGE UNDER BELOW ZERO TEMPERATURES KEEP THE UNIT IN THE SPECIFIED OPERATION CONDITIONS FOR AT LEAST 4 HOURS BEFORE POWERING UP Prior to the heater installation check the heater for the integrity and reliability of the heating element fixation The working position of the heater must ensure unimpeded access to the junction box control unit and the RESET thermoswitch manual reset button mounted inside the control unit The heater must be securely fastened in place The mounting location must enable quick access to the heater and provide ample space for technical maintenance operations The heater must be installed into the ventilation system so that the arrow on the heater casing matches the air flow direction The minimum clearance between the heater and other ventilation system components should double the connection size No inflammable explosive or fire hazardous materials are allowed within 150 mm of the heater casing and within 500 mm of the heater air inlet and outlet Air ducts and fans must be equipped with a grille or similar protective device preventing free access to the tubulr heating elements Pre commissioning precautions e The unit must be safely earthed in compliance with the Electrical Installations Regulations i e the clamp must be connected to the protective ground wire e The minimum air flow through the heater must comply wi2. Control Unit Lid Heat Sink Indicator Panel Sealed Lead In Temperature Control Knob ON OFF Button Casing Tubular Heating Element The NKU heaters with integral control units for rectangular ducts consist of a casing with a rigidly mounted junction box The junction box has a removable front panel featuring the temperature control knob the ON OFF button and the indicator panel Heat Sink ON OFF Button Indicator Panel Temperature Control Knob Casing Tubular Heating Element Sealed Lead In eo VENTS Functional Switches and Indicators There are three lights on the indicator panel O e Power AC Mains Green Light Alarm Booster e Statuslights Operation Yellow AC Mains Operation Heating e Alarm Booster Heating Red Current State and Malfunction Indication Alarm Booster bred Mnt event Red Light OFF OFF OFF AC Mains Disconnected ON ON BLINKS IN 5 s INTERVALS Temperature Boosting T set gt T flow ON ON ON Switching to Mode T set flow ON OFF ON Overheating T set lt T flow ON ON BLINKS IN 1 s INTERVALS Duct Pressure Switch Signal Lost ON ON TK50 thermal contact actuation ON ALTERNATE BLINKING Heating Power Output Irrespective of Sensor ON SIMULTANEOUS BLINKING Alarm Controller Circ
3. 160 2 4 1U 159 154 267 370 290 2 8 NK 200 1 2 1U 199 174 302 306 228 2 6 NK 200 1 7 1U 199 174 302 306 228 2 6 200 2 0 1U 199 174 302 306 228 2 6 NK 200 2 4 1U 199 174 302 376 298 92 NK 250 1 2 1U 249 174 356 306 228 3 3 NK 250 2 0 1U 249 174 356 306 228 3 3 NK 250 2 4 1U 249 174 356 376 298 3 9 315 1 2 1U 313 174 425 306 228 4 1 315 2 0 1U 313 174 425 306 228 4 1 315 2 4 1U 315 174 425 376 298 5 eo VENTS NKU OVERALL DIMENSTIONS FOR ROUND DUCTS FROM 3 0 KW UP TO 9 0 KW L1 B IIl NKU with integrated control unit for round air ducts from 3 0 kW up D mm B mm H mm L mm L1 mm Weight kg to 9 0 kW NK 150 3 4 1U 149 187 340 370 298 4 3 150 3 6 3U 149 187 340 370 298 4 9 NK 150 5 1 3U 149 187 340 370 298 4 9 150 6 0 3U 149 187 340 370 298 4 9 NK 160 3 4 1U 159 187 350 370 298 4 6 160 3 6 3U 159 187 350 370 298 5 2 160 5 1 3U 159 187 350 370 298 5 2 160 6 0 3U 159 187 350 370 298 572 200 3 4 10 199 237 389 376 298 5 2 200 3 6 30 199 237 389 376 298 5 9 200 5 1 3U 199 237 389 376 298 5 9 200 6 0 3U 199 237 389 376 298 59 NK 250 3 0 1U 249 237 446 376 298 5 1 250 3 6 3U 249 237 446 376 298 6 6 NK 250 6 0 3U 249 237 446 376 298 6 6 250 9 0 3U 249 237 446 376 298 6 6 N
4. Current A 20 16 NK 160 2 0 1U NK 160 2 4 1U NK 200 1 2 1U NK 200 1 7 1U NK 200 2 0 1U NK 200 2 4 1U NK 250 1 2 1U NK 250 2 0 1U NK 250 2 4 1U NK 315 1 2 1U NK 315 2 0 1U NK 315 2 4 1U Automatic Circuit Breaker Trip Current Selection for NKU Heaters with a Control Unit for Round Ducts from 3 0 kW to 9 0 kW Number and Cross Section of Cores mm 3x2 5 3x2 5 3x2 5 3x2 5 5x2 5 5x25 5x2 5 5x2 5 5x2 5 5x2 5 5x2 5 5x2 5 5x2 5 5x2 5 5x2 5 5x2 5 Wiring Diagram for NKU Heaters with a Control Unit for Round Ducts from 3 0 kW to 9 0 kW and for the entire model range of Rectangular Ducts from 4 5 kW to 54 kW 400 V 50Hz 1 L2 L3 i N PE NK 150 3 6 3U NK 150 5 1 3U NK 150 6 0 3U NK 160 3 6 3U NK 160 5 1 3U NK 160 6 0 3U NK 200 3 6 3U NK 200 5 1 3U NK 200 6 0 3U NK 250 3 6 3U NK 250 6 0 3U NK 250 9 0 3U NK 315 3 6 3U NK 315 6 0 3U NK 315 9 0 3U Heaters with a Control Unit for Rectangular Ducts from 4 5 kW to 54 kW NK 400x200 4 5 3U NK 400x200 6 0 3U NK 400x200 7 5 3U NK 400x200 9 0 3U NK 400x200 10 5 3U NK 400x200 12 0 3U NK 400x200 15 0 3U 500x250 6 0 3U NK 500x250 7 5 3U 500x250 9 0 3U 500x250 10 5 3U 500x250 12 0 3U 500x250 15 0 3U 500x250 18 0 3U NK 500x250 21 0 3U 500x300 6 0 3U 500x300 7 5 3U 500x300 9 0 3U 500x300 10 5 3U 500x300 12 0 3U NK 500x300 15 0 3U 50
5. HEATER MOUNTING SAFETY PRECAUTIONS Do not operate the heater beyond the temperature range stated in the user s manual or in aggressive or explosive environments The heater must be disconnected from the power supply prior to installation servicing or repair operations Do not position any heating devices or other Do not use damaged equipment or equipment in close proximity to the heater conductors to connect the heater to power power cord mains While installing the heater follow the safety Unpack the heater with care regulations specific to the use of electric tools 4 Do not change the power cord length at your own discretion Do not bend the power cord Avoid damaging the power cord Use the heater only as intended by the manufacturer eo VENTS HEATER OPERATING SAFETY PRECAUTIONS Do not touch the controls with wet hands Do not perform the heater maintenance with wet hands Do not wash the heater with water Protect the heater electric parts from water ingress Disconnect the heater from power supply Do not block the air duct when the heater is on prior to maintenance Do not damage the power cable while Do not let children operate the heater operating the heater Do not put any objects on the power cable In case of unusual sounds smoke disconnect the heater from power supply and contact the service centre Keep combustible and inflammable substances away of the heater Do n
6. 500 520 702 300 320 NK 500x300 18 0 3U 500 520 702 300 320 NK 500x300 21 0 3U 500 520 702 300 320 NK 600x300 9 0 3U 600 620 802 300 320 NK 600x300 12 0 3U 600 620 802 300 320 NK 600x300 15 0 3U 600 620 802 300 320 NK 600x300 18 0 3U 600 620 802 300 320 NK 600x300 21 0 3U 600 620 802 300 320 NK 600x300 24 0 3U 600 620 802 300 320 2 240 240 240 240 240 240 240 290 290 290 290 290 290 290 290 340 340 340 340 340 340 340 340 340 340 340 340 340 340 L mm 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 228 Weight kg 18 24 18 24 18 24 18 52 18 52 18 52 18 52 22 4 22 4 23 0 23 0 23 0 23 1 2371 23 1 220 22 9 23 5 23 5 23 5 24 0 24 0 24 0 27 0 27 0 27 0 27 5 27 5 27 5 eo VENTS NKU Heater with a Control Unit for Rectangular Ducts from 4 5 1 B3 mm Himm 1 2 L mm en kW to 54 kW NK 600x350 9 0 3U 600 620 802 350 370 390 228 28 2 NK 600x350 12 0 3U 600 620 802 350 370 390 228 28 2 NK 600x350 15 0 3U 600 620 802 350 370 390 228 28 5 NK 600x350 18 0 3U 600 620 802 350 370 390 228 28 5 NK 600x350 21 0 3U 600 620 802 350 370 390 228 28 5 NK 600x350 24 0 3U 600 620 802 350 370 390 228 28 5 NK 700x400 18 0 3U 700 720 924 400 420 440 410 16 8 700
7. NK 500x250 9 0 3U 660 13 0 400 9 0 3 item x3 0 NK 500x250 10 5 3U 770 15 2 400 10 5 3 item x3 5 NK 500x250 12 0 3U 880 17 4 400 12 0 3 item x4 0 NK 500x250 15 0 3U 1100 21 7 400 15 0 3 item x5 0 NK 500x250 18 0 3U 1320 26 0 400 18 0 3 item x6 0 500x250 21 0 3U 1540 30 0 400 21 0 3 item x7 0 NK 500x300 6 0 3U 440 8 7 400 6 0 3 item x2 5 500x300 7 5 3U 550 10 9 400 7 5 3 item x3 0 NK 500x300 9 0 3U 660 13 0 400 9 0 3 item x3 5 NK 500x300 10 5 3U 770 15 2 400 10 5 3 item x4 0 NK 500x300 12 0 3U 880 17 4 400 12 0 3 item x5 0 500x300 15 0 3U 1100 217 400 15 0 3 item x6 0 NK 500x300 18 0 3U 1320 26 0 400 18 0 3 item x7 0 500x300 21 0 3U 1540 30 0 400 21 0 3 item x2 5 NK 600x300 9 0 3U 660 13 0 400 9 0 3 item x3 0 600x300 12 0 3U 880 17 4 400 12 0 3 item x4 0 600x300 15 0 3U 1100 2177 400 15 0 3 item 5 0 600x300 18 0 3U 1320 26 0 400 18 0 3 item x6 0 600x300 21 0 3U 1540 30 0 400 21 0 3 item x7 0 600x300 24 0 3U 1760 34 7 400 24 0 3 item x8 0 600x350 9 0 3U 660 13 0 400 9 0 3 item x3 0 600x350 12 0 3U 880 17 4 400 12 0 3 item x4 0 600x350 15 0 3U 1100 2177 400 15 0 3 item 5 0 600x350 18 0 3U 1320 26 0 400 18 0 3 item x6 0 600x350 21 0 3U 1540 30 0 400 21 0 3 item x7 0 600x350 24 0 3U 1760 34 7 400 24 0 3 item x8 0 700x400 18 0 3U 1320 26 0 400 18 0 6 item x3 0 700x400 27 0 3U 1980 39 0 400 27 0 9 item x3 0 NK 700x400 36 0 3U 2640 52 0 400 36 0 12 item x3 0 NK 800x50
8. actuate at 50 is connected to the A1 controller terminal at the factory Gnd and In2 see Page 14 TK90 the heater overheating protection thermoswitch set to actuate at 90 is connected to the A1 controller terminal at the factory CQ see Page 14 and to the circuit of the master switch see Page 14 Supply the power voltage to the unit and activate the heater by pressing the ON OFF button Then use the controller knob connected to the pot resistor to set the desired temperature in the range from 0 C to 40 C The NKU heaters equipped with a control unit have one or several power relays depending on the number of the controlled cascades in use The relays are connected to the controller circuit board via the TK 90 protective thermal contact at the factory EXTERNAL CONNECTIONS DIAGRAM External Temperature Signal Thermoresistor Source Air Flow Start Sensor Signal mm 0 10V Controller Gnd Out E KS El 2 eoo O GND PTin PT GND 0 10 Control PD1 Enable 036 010 MAINTENANCE THE HEATER TECHNICAL MAINTENANCE MUST BE PERFORMED BY ADEQUATELY QUALIFIED AND TRAINED PERSONNEL UPON HEATER DISCONNECTION FROM THE POWER MAINS Heater maintenance includes inspection of screw rivet and welded connec
9. those ones described in this manual rae Technical data NKU with integrated temperature Number of electric a Min air flow m h Supply Voltage V heating elements x power kW NK 100 0 6 1U 60 2 6 230 1 item x 0 6 100 0 8 1U 80 35 230 1 item x 0 8 NK 100 1 2 1U 90 5 2 230 2 item x 0 6 NK 100 1 6 1U 120 7 0 230 2item x 0 8 NK 100 1 8 1U 130 78 230 3 item x 0 6 NK 125 0 6 1U 60 2 6 230 1 item x 0 6 NK 125 0 8 1U 80 3 5 230 1 item x 0 8 NK 125 1 2 1U 90 5 2 230 2 item x 0 6 NK 125 1 6 1U 120 7 0 230 2item x 0 8 NK 125 2 4 1U 150 7 8 230 3 item x 0 8 150 1 2 1U 120 5 2 230 1 item x 1 2 150 1 7 1U 130 7 4 230 1 item x 1 7 150 2 0 1U 140 8 7 230 1 item x 2 0 150 2 4 1U 150 10 4 230 2 item x 1 2 NK 160 1 2 1U 150 5 2 230 1 item x 1 2 NK 160 1 7 1U 160 7 4 230 1 item x 1 7 160 2 0 1U 170 8 7 230 1 item x 2 0 NK 160 2 4 1U 180 10 4 230 2 item x 1 2 200 1 2 1U 150 5 2 230 1 item x 1 2 200 1 7 1U 160 7 4 230 1itemx 1 7 NK 200 2 0 1U 170 8 7 230 1 item x 2 0 200 2 4 1U 180 10 4 230 2 item x 1 2 250 1 2 1U 180 5 2 230 1 item x 1 2 250 2 0 1U 200 8 7 230 1 item x 2 0 250 2 4 1U 265 10 4 230 2 item x 1 2 NK 315 1 2 1U 180 572 230 1 item x 1 2 NK 315 2 0 1U 200 8 7 230 1 item x 2 0 315 2 4 1U 265 10 4 230 2 item x 1 2 VENTS Technical data in E l Min air flow m h current Et umption Supply Voltage V
10. 0 27 0 3U 1980 39 0 400 27 0 9 item x3 0 NK 800x500 36 0 3U 2640 52 0 400 36 0 12 item x3 0 NK 800x500 54 0 3U 3960 78 0 400 54 0 18 item x3 0 NK 900x500 45 0 3U 3300 65 0 400 45 0 15 item x3 0 NK 900x500 54 0 3U 3960 78 0 400 54 0 18 item x3 0 NK 1000x500 45 0 3U 3300 65 0 400 45 0 15 item x3 0 NK 1000x500 54 0 3U 3960 78 0 400 54 0 18 item x3 0 NKU OVERALL DIMENSTIONS FOR ROUND DUCTS FROM 0 6 KW UP TO 2 4 KW L1 NKU with integrated temperature control unit for round air ducts D mm B mm H mm L mm L1 mm Weight kg from 0 6 kW up to 2 4 kW NK 100 0 6 1U 99 94 204 306 227 1 5 100 0 8 10 99 94 204 306 227 175 100 1 2 1U 99 120 204 370 290 1 6 100 1 6 1U 99 120 204 370 290 1 6 100 1 8 1U 99 120 204 454 374 1 8 125 0 6 1U 124 103 230 306 227 1 6 125 0 8 1U 124 103 230 306 227 1 6 125 1 2 1U 124 126 230 370 290 1 8 125 1 6 1U 124 126 230 370 290 1 8 125 2 4 1U 124 126 230 454 374 2 150 1 2 1U 149 144 255 306 226 2 1 150 1 7 1U 149 144 255 306 226 25 150 2 0 1U 149 144 255 306 226 2 1 150 2 4 10 149 144 255 370 290 2 6 160 1 2 10 159 154 267 306 226 2 2 160 1 7 10 159 154 267 306 226 22 160 2 0 1U 159 154 267 306 226 2 2
11. 0x300 18 0 3U NK 500x300 21 0 3U 600x300 9 0 3U 600x300 12 0 3U 600x300 15 0 3U 600x300 18 0 3U NK 600x300 21 0 3U NK 600x300 24 0 3U NK 600x350 9 0 3U 600x350 12 0 3U NK 600x350 15 0 3U 600x350 18 0 3U NK 600x350 21 0 3U 600x350 24 0 3U 700x400 18 0 3U 700x400 27 0 3U 700x400 36 0 3U NK 800x500 27 0 3U NK 800x500 36 0 3U NK 800x500 54 0 3U NK 900x500 45 0 3U NK 900x500 54 0 3U 1000x500 45 0 3U NK 1000x500 54 0 3U 54 kW Supply Voltage V 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 Circuit Breaker Trip Current A 10 50 16 16 20 20 25 10 16 16 20 20 25 215 40 0 10 16 16 20 20 25 SS 40 16 20 25 31 5 40 40 16 20 25 30 40 40 315 50 63 50 63 100 80 100 80 100 Automatic Circuit Breaker Trip Current Selection for NKU Heaters with a Control Unit for Rectangular Ducts from 4 5 kW to Number and Cross Sec tion of Cores mm2 5 2 5 5x2 5 5 2 5 5 2 5 5 2 5 5 2 5 5 2 5 5x2 5 5 2 5 5 2 5 5x2 5 5x2 5 5 2 5 5 4 5 4 5x2 5 5 2 5 5 2 5 5x2 5 5x2 5 5x2 5 5x4 5x4 5x2 5 5X2 5 5x2 5 5x4 5x4 5x4 5x2 5 5x2 5 5x2 5 5x4 5x4 5x4 5x4 5x6 5x10 5x6 5x10 5x16 5x10 5x16 5x10 5x16 HEATER CONTROL NKU HEATER WITH A B
12. 3 2 5 200 1 2 1U 230 6 3 3 2 5 200 1 7 1U 230 8 0 3 2 5 200 2 0 1U 230 10 0 3 2 5 200 2 4 1U 230 125 3 2 5 250 1 2 1U 230 6 3 3 2 5 250 2 0 1U 230 10 0 3 2 5 250 2 4 1U 230 12 5 3 2 5 315 1 2 1U 230 6 3 3 2 5 315 2 0 1U 230 10 0 3 2 5 315 2 4 1U 230 12 5 3 2 5 230 50 2 Wiring Diagrams for NKU Heaters from 0 6 kW to 2 4 kW NK 100 0 6 1U NK 100 0 8 1U NK 125 0 6 1U NK 125 0 8 1U q O x15 25 100 1 2 1U 100 1 6 10 100 1 8 10 NK 125 1 2 1U 125 1 6 1U 125 2 4 1U 150 1 2 1U 150 1 7 10 150 2 0 1U 150 2 4 10 160 1 2 1U 160 1 7 10 CONNECTION OF NKU WITH CONTROL UNIT FOR ROUND AND RECTANGULAR DUCTS NKU Heaters with a Control Unit for Round Ducts NK 150 3 4 1U 160 3 4 1U NK 200 3 4 1U 250 3 0 1U NK 150 3 6 3U 160 3 6 3U NK 200 3 6 3U NK 250 3 6 3U NK 315 3 6 3U 150 5 1 3U NK 160 5 1 3U 200 5 1 3U NK 250 6 0 3U 315 6 0 3U NK 250 9 0 3U 315 9 0 3U 230 V 50Hz from 3 0 kW to 9 0 kW NK 150 3 4 1U NK 160 3 4 1U NK 200 3 4 1U NK 250 3 0 1U Supply Voltage V 230 230 230 230 400 400 400 400 400 400 400 400 400 400 400 400 Wiring Diagram for NKU Heaters with a Control Unit for Round Ducts from 3 0 kW to 9 0 kW Circuit Breaker Trip
13. APPROPRIATE QUALIFICATION ANY OPERATIONS WITH THE HEATER MUST BE PERFORMED ONLY BY PROPERLY QUALIFIED PERSONNEL AFTER THE APPROPRIATE SAFETY BRIEFING THE HEATER INSTALLATION SITES MUST PREVENT ACCESS BY UNATTENDED CHILDREN DELIVERY SET Heater 1 item User s manual 1 item Packing box 1 item DESIGNATION KEY NKU FOR ROUND DUCTS Product type NK duct heater Connected air duct diameter mm Heater power kW Phase 1 single phase 3 three phase Integrated temperature control unit NKU FOR RECTANGULAR DUCTS Product type NK duct heater Connected air duct width mm 400 500 600 700 800 900 1000 Connected air duct height mm 200 250 300 350 400 500 Heater power kW Phase 3 three phase Integrated temperature control unit eo VENTS MAIN TECHNICAL PARAMETERS The heater is intended for operation in closed spaces under ambient air temperatures from 40 C to 80 C and relative humidity up 80 The unit is capable of maintaining the duct temperature in the following range From 10 C to 40 units rated from 0 6 kW to 2 4 kW From 0 C to 40 C NKU units rated from 3 0 kW to 54 kW The heater must be grounded Hazardous parts access and water ingress protection standard is IP 40 Allowable deviation from the rated voltage is 10 The heater design is regularly improved so some models may slightly differ from
14. Duct sensor with a mounting flange encased in a rolled tube KDT2 M 100 400 mm Duct sensor with a mounting flange encased in a rolled tube equipped with a terminal box KDT2 M 100 400 mm The temperature is controlled by means of connecting and disconnecting the full load The TRIAC power controller of the NKU heaters effects proportional time control by changing the relation between the load on time and off time depending on the pre programmed heating requirements For example if the full load is intermittently on and off 5 second periods the heater runs at 50 of its maximum power output The cycle time i e the total of the load on time and off time is programmed at the factory in the range from 1 to 6 seconds by using the appropriately rated resistance 3 see Fig 14 The load is commutated by means of a TRIAC controller The NKU has two built in thermal contacts for overheating protection the automatic reset TK50 with intervention temperature of 50 C and the manual reset TK90 with intervention temperature of 90 The thermal contacts are connected to the control unit terminals The air temperature is set by means of the integral pot resistor or an external control device generating a 0 10 V control input signal to increase the duct temperature proportionally in the range from 0 to 40 The NKU heaters with integral control units for round ducts consist of a casing with a rigidly mounted junction box which has a removable top lid
15. K 315 3 6 3U 313 237 514 376 298 5 6 315 6 0 3U 313 257 514 376 298 7 4 315 9 0 30 313 237 514 376 298 7 4 OVERALL DIMENSIONS HEATERS FOR RECTANGULAR DUCTS FROM 4 5 KW TO 54 KW 09 z i 1 Ha eh m o j 2 o 4 I fS E gt E a lt NKU Heater with a Control Unit for Rectangular Ducts from 4 5 Bi mm B3 mm Himm mm kW to 54 kW NK 400x200 4 5 3U 400 420 611 200 220 NK 400x200 6 0 3U 400 420 611 200 220 NK 400x200 7 5 3U 400 420 611 200 220 NK 400x200 9 0 3U 400 420 665 200 220 NK 400x200 10 5 3U 400 420 665 200 220 NK 400x200 12 0 3U 400 420 665 200 220 NK 400x200 15 0 3U 400 420 665 200 220 NK 500x250 6 0 3U 500 520 702 250 270 NK 500x250 7 5 3U 500 520 702 250 270 NK 500x250 9 0 3U 500 520 702 250 270 NK 500x250 10 5 3U 500 520 702 250 270 NK 500x250 12 0 3U 500 520 702 250 270 NK 500x250 15 0 3U 500 520 702 250 270 NK 500x250 18 0 3U 500 520 702 250 270 NK 500x250 21 0 3U 500 520 702 250 270 NK 500x300 6 0 3U 500 520 702 300 320 NK 500x300 7 5 3U 500 520 702 300 320 NK 500x300 9 0 3U 500 520 702 300 320 NK 500x300 10 5 3U 500 520 702 300 320 NK 500x300 12 0 3U 500 520 702 300 320 NK 500x300 15 0 3U
16. UILT IN TEMPERATURE CONTROL UNIT FOR ROUND DUCTS Use the temperature control knob to set the desired temperature in the air duct thermostat operation threshold The temperature can be set in the range from 10 to 40 The heater switches on automatically upon the air temperature dropping below the pre set thermostat operation threshold When the air warms up to the pre set level the heater switches off automatically NKU HEATERS WITH CONTROL UNIT FOR ROUND AND RECTANGULAR DUCTS Complete the electrical connections according to the respective diagram see Page 18 To use the temperature sensor feedback connect the sensor to the X2 terminal block TE1 PTin PT PT Sensor Power Brown Gnd Analogue Ground Contact Shield PTin Sensor Signal Input White Jumper 1 see Page 14 toggles the heater control method the 0 10 V control signal or the feedback from the built in temperature controller pot resistor To use the feedback from an external control device connect it to the X2 terminal block Control GND 0 10 V Gnd Analogue Ground Contact 0 10V External Signal Input Protective Contact Circuit Connection The Start signal the activation signal source device must be connected to the X2 terminal Enable nc and The flow sensing element the supply filter pressure switch must be connected to the X2 terminal PD1 nc and TK50 the heater overheating protection thermoswitch set to
17. USER S MANUAL AIR DUCT HEATER WITH INTEGRATED TEMPERATURE CONTROL UNIT OR A CONTROL UNIT O VENTI E Safety requirements Introduction Use Delivery set Designation key Main technical parameters Design and operating logic Mounting and set up Connection to power mains Heater control Manufacturer s warranty Maintenance Storage and transportation rules Acceptance certificate Seller s information Mounting certificate Warranty Card ua 15 18 20 20 21 21 22 22 22 23 SAFETY REQUIREMENTS Read the user s manual carefully prior to the operation and installation of the air duct heater with an integrated temperature control unit hereinafter the heater Installation and operation of the heater shall be performed in accordance with the present user s manual as well as the provisions of all the applicable local and national construction electrical and technical codes and standards The warnings contained in the present user s manual must be considered most seriously since they contain vital personal safety information A Failure to follow the safety regulations and rules may result in an injury or heater damage Read the manual carefully and keep it as long as you use the heater e While transferring the heater control the user s manual must be turned over to the receiving operator Symbol legend used the manual DO NOT
18. c thermostat controller circuit board In the NK100 125 0 6 0 8 1U models the TRIAC is installed on a heat sink inside the junction box All other models feature external heat sinks to dissipate extra heat The heater is also equipped with a manual reset thermoswitch rated to trip at 60 The thermoswitch actuation may be caused by an abnormal temperature increase in the event of the thermostat electronic unit failure The electrical connections diagram is given on the inside of the junction box lid Junction Box Lid Heat Sink Sealed Lead In Temperature Selection Knob Temperature Sensor Casing Tubular Heating Element eo VENTS NKU HEATER WITH A CONTROL UNIT FOR ROUND AND RECTANGULAR DUCTS The duct heater is equipped with a three phase TRIAC power controller to regulate the output of the tubular electric heating elements The units benefit from proportional integral control used for adjusting the supply air temperature with automatic control function adaptation The control unit can use the temperature sensor feedback to maintain the pre set duct temperature or the heating output proportionally to the 0 10 V external control signal value in the range from 0 to 100 While switching the duct temperature sensor mode select one of the temperature sensors below Duct temperature sensor with a sealed end KDT2 M1 100 400 mm
19. he heater operates normally as intended by the manufacturer VENTS WARRANTY CARD Product type Air duct heater with integrated temperature control unit As 23
20. heater control regulations heater connection to the power pains with a voltage different from the one stated in the user s manual heater breakdown due to voltage surges in the power mains e User s discretionary repair of the heater heater repair performed by any non authorised by the manufacturer persons Expiry of the heater warranty period User s violation of the established regulations specific to the heater transportation User s violation of the heater storage regulations Wrongful acts against the heater committed by third persons heater breakdown due to circumstances of insuperable force fire flood earthquake war hostilities of any kind or blockade Missing seals if provided by the user s manual Failure to provide the user s manual with the sale date stamp Missing payment document certifying the heater purchase FOLLOWING THE REGULATIONS STIPULATED HEREIN WILL ENSURE A LONG AND TROUBLE FREE OPERATION OF THE HEATER USERS CLAIMS SHALL SUBJECT REVIEW ONLY UPON PRESENTATION OF THE HEATER THE PAYMENT DOCUMENT AND THE USER S MANUAL WITH THE SALE eo VENTS ACCEPTANCE CERTIFICATE Product Type The air duct heater with integrated temperature control unit or control unit Model NK O emm OOS 15 recognized as serviceable The product complies with the requirements according to the EU norms and directives to the relevant EU Low Voltage Equipmen
21. heating elements x power kW 150 3 4 1U 220 14 7 230 2 item x 1 7 NK 150 3 6 3U 265 52 400 3 item x 1 2 150 5 1 3U 320 7 4 400 3 item x 1 7 150 6 0 3U 360 8 7 400 3 item x 2 0 NK 160 3 4 1U 250 14 8 230 2 item x 1 7 NK 160 3 6 3U 265 52 400 3itemx 1 2 NK 160 5 1 3U 375 7 4 400 3 item x 1 7 160 6 0 3U 440 8 7 400 3 item x 2 0 NK 200 3 4 1U 250 14 8 230 2 item x 1 7 NK 200 3 6 3U 265 52 400 3itemx 1 2 NK 200 5 1 3U 375 7 4 400 3 item x 1 7 200 6 0 3U 440 8 7 400 3 item x 2 0 250 3 0 1U 375 13 0 230 1 item x 3 0 250 3 6 3U 375 52 400 3 item x 1 2 NK 250 6 0 3U 440 8 7 400 3 item x 2 0 NK 250 9 0 3U 660 13 0 400 3 item x 3 0 NK 315 3 6 3U 375 5 2 400 3 item x 1 2 NK 315 6 0 3U 440 8 7 400 3 item x 2 0 315 9 0 3U 660 13 0 400 3 item x 3 0 7 5 Technical data NKU with integrated control unit Number of for rectangular air ducts from Min air flow Currentcon Supply Voltage electric heating 4 5 kW up to 54 kW m h sumption A V elements x power kW NK 400x200 4 5 3U 330 6 5 400 4 5 3 item x1 5 NK 400x200 6 0 3U 440 8 7 400 6 0 3 item x2 0 400x200 7 5 3U 550 10 9 400 7 5 3 item x2 5 NK 400x200 9 0 3U 660 13 0 400 9 0 3 item x3 0 NK 400x200 10 5 3U 770 15 2 400 10 5 3 item x3 5 NK 400x200 12 0 3U 880 17 4 400 12 0 3 item x4 0 NK 400x200 15 0 3U 1100 21 7 400 15 0 3 item x5 0 NK 500x250 6 0 3U 440 8 7 400 6 0 3 item x2 0 NK 500x250 7 5 3U 550 10 9 400 7 5 3 item x2 5
22. ition Horizontal Position Installation In a horizontal position the junction box must face upwards The horizontal deviation may be up to 90 The heater junction box may not face downwards 6606 X Connecting Rectangular Air Ducts to the Heater CONNECTION TO POWER MAINS DISCONNECT THE HEATER FROM THE POWER SUPPLY PRIOR TO ANY WORK ON THE UNIT THE POWER MAINS CONNECTION SHALL ONLY BE PERFORMED BY A PROFESSIONAL ELECTRICIAN THE NOMINAL ELECTRICAL PARAMETERS OF THE HEATER ARE GIVEN ON THE MANUFACTURER S LABEL ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED AND WILL VOID THE WARRANTY The heater is powered with 230 V 50 Hz single phase alternating current or 400 V 50 Hz three phase current depending on the particular NKU model The heater connection must be made on the terminal block mounted on a plank inside the junction box or the control unit in accordance with the electrical connections diagram and terminal designations as shown on the respective schematic Route the cables into the unit through sealed lead ins in the casing sidewall as per the electric hazard class specifications The external lead in 230 V 50 Hz or 400 V 50Hz must be equipped with an automatic circuit breaker built into the stationary wiring to interrupt the network phases The location of the QF external switch must ensure free access for quick shutdown of the heater The protection trip current must be consistent with the cu
23. ot cover the electric heater with any materials Do not place any appliances on top of the heater Do not put any water containers e g vases etc on top of the heater o MENTS INTRODUCTION The present operation manual consisting of technical details operating instructions and technical specification contains the information specific to the installation and mounting of the following duct heater models NKU heater with a built in temperature control unit for round ducts from 0 6 kW to 2 4 kW NKU heater with a control unit for round ducts from 3 0 kW to 9 0 kW NKU heater with a control unit for rectangular ducts from 4 5 kW to 54 kW PURPOSE The heater is intended to heat up the supply air entering the ventilation system The built in temperature control module or the integral control unit ensure that air duct temperature is automatically maintained at the pre set level The heater is designed for extended periods of continuous operation without disconnection from the power mains Being a component unit the heater may not be commissioned for standalone operation Transported air must not contain any flammable or explosive mixtures evaporation of chemicals coarse dust soot and oil particles sticky substances fibrous materials pathogens or any other harmful substances THE HEATER IS NOT INTENDED TO BE USED BY CHILDREN PHYSICALLY OR MENTALLY DISABLED PERSONS PERSONS WITH SENSORY DISORDER PERSONS WITH NO
24. rrent consumption of the unit The recommended nominal trip current of the circuit breaker the cross section and the number of cores are given in the respective tables The heater connections cables and wires must be durable insulated and heat resistant The given wire sections are for reference only The conductor section selection must account for the maximum permissible wire heating which depends on the wire type its insulation length and installation method i e overhead in pipes or inside walls CONNECTION OF NKU WITH INTEGRATED TEMPERATURE CONTROL UNIT FOR ROUND AIR DUCTS Automatic Circuit Breaker Trip Current Selection for NKU Heaters with an Integrated Temperature Control Unit for Round Ducts from 0 6 kW to 2 4 kW NKU heater with a built in temperature control Supply Voltage V Circuit Breaker Trip Number and unit for round ducts from 0 6 Kw to 2 4 Kw Current A Section of Cores mm NK 100 0 6 1U 230 3 15 3x0 75 100 0 8 1U 230 4 0 3x0 75 NK 100 1 2 1U 230 6 3 3 2 5 100 1 6 1U 230 8 0 3 2 5 100 1 8 1U 230 10 0 3 2 5 125 0 6 1U 230 85 3 0 75 125 0 8 14 230 4 0 3 0 75 125 1 2 1U 230 6 3 3x2 5 NK 125 1 6 1U 230 8 0 3x2 5 NK 125 2 4 1U 230 10 0 3x2 5 NK 150 1 2 1U 230 6 3 3 2 5 150 1 7 1U 230 8 0 3 2 5 150 2 0 1U 230 10 0 3 2 5 150 2 4 1U 230 12 3 2 5 160 1 2 1U 230 6 3 3 2 5 160 1 7 1U 230 8 0 3 2 5 160 2 0 1U 230 10 0 3 2 5 160 2 4 1U 230 12 5
25. t Directives EU Directives on Electromagnetic Compatibility We hereby declare that the following 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 certificate is issued following test carried out on samples of the product referred to above Assessment of compliance of the product with the requirements relating to electromagnetic compatibility was based on the following standards Quality Inspector s Stamp SELLER S INFORMATION Shop name Address Telephone Sales date This is to certify delivery of the complete heater with the user s manual The warranty terms are T acknowledged and accepted Sellers zal MOUNTING CERTIFICATE The air duct heater with integrated temperature control unit or control unit NK U has been connected to power mains pursuant to the requirements stated in the present user s manual Company name amm Installation technician s full name installation date Signature instlhtion technicians company seal This is to certify that the works specific to the heater installation have been performed in accordance with all the applicable provisions of local and national construction electrical and technical codes and standards T
26. th the value stated in the technical specification see pages 6 7 8 The fan must be installed in the air duct upstream of the heater along the air flow direction to eliminate the possibility of extra heat load on the electric motor Wherever possible a supply filter should be installed upstream of the heater to reduce contamination To ensure proper and safe operation the heater should be equipped with an automatic control system capable of comprehensive control and protection in particular e Monitoring the filter condition using the pressure differential sensor feedback e Powering off the heater in the event of the supply fan shutdown or air flow velocity drop as well as upon actuation of the built in overheating protection thermostat e Ventilation system shutdown after a 30 second blowing cycle required to cool down the electric heating elements The supply voltage must be fed via an automatic circuit breaker with a minimum gap of 3 mm between the open contacts on all poles The circuit breaker must be integrated into the stationary wiring in accordance with the applicable electrical wiring regulations To access the terminal block remove the junction box control unit lid NKU TERMINAL BLOCK ACCESS E VENT Connecting Round Air Ducts to the Heater The heater is designed for internal installation into air ducts in the horizontal or vertical pos
27. tions inspection of screw ground clamp tightening and electric connections inspection of wire terminal connections e e e cleaning of the heating elements of dust and dirt Cleaning with solvents or flammable substances is not allowed o WENT S STORAGE AND TRANSPORTATION RULES Store the heater in the manufacturer s original packing box in a dry ventilated premise at the temperatures from 5 C up to 40 Storage environment must not contain aggressive vapours and chemical mixtures provoking corrosion insulation and sealing deformation Use hoist machinery for handling and storage operations to prevent the heater damage Fulfil the handling requirements applicable for the applicable freight type Transportation with any vehicle type is allowed provided that the heater is protected against mechanical and weather damage Avoid any mechanical shocks and strokes during handling operations MANUFACTURER S WARRANTY The manufacturer hereby warrants normal operation of the heater over the period of 24 months from the retail sale date provided the user s observance of the transportation storage installation and operation regulations Should any malfunctions occur during the heater operation through the manufacturer s fault during the warranty period the user is entitled to elimination of faults by means of warranty repair performed by the manufacturer The warranty repair includes work specific to elimination of faul
28. ts in the heater operation to ensure its intended use by the user within the warranty period The faults are eliminated by means of replacement or repair of the complete heater or the faulty part thereof The warranty repair does not include Routine maintenance Heater installation dismantling Heater setup To benefit from warranty repair the user must provide the heater the user s manual with stamped sale date and the payment document certifying the purchase The heater model must comply with the one stated in the user s manual Contact your Seller for warranty service The manufacturer s warranty does not apply to the following cases User s failure to provide the heater with the entire delivery package as stated in the user s manual or with missing component parts previously dismounted by the user Mismatch of the heater model and make with the respective details stated on the heater packing and in the user s manual User s failure to ensure timely technical maintenance of the heater External damage to the casing excluding external modifications of the heater as required for its installation and the internal components of the heater A Alteration of the heater design or engineering changes of the heater Replacement and use of the heater assemblies parts and components not approved by the manufacturer heater misuse User s violation of the heater installation regulations User s violation of the
29. uit Board Functional Outputs 1 Internal or External 0 10 V Control Input Selection 2 Control Mode Selection 3 Cycle Length Adjustment Resistor factory set 4 Indication of TRIAC Operation and Heating Cascade Activation 5 Heating Cascade 1 Indicator 6 Second Heating Cascade Indicator 7 Heating Cascade 3 Indicator 8 Terminal Block for Temperature Sensor Connection 9 Terminal Block for External 0 10 V Control Input 10 Terminal Block for Protection and Enabling Contacts 11 Control Circuit Board Fuse To facilitate connection by the user Outputs 8 9 and 10 are factory commutated on the X2 terminal block see Page 20 Heater Control Jumper 1 External Signal Source 0 10 V Internal Pot Resistor 0 10 V Cee 960 lo oS mm g lo 5 K Jumper 2 Temperature Sensor Feedback Mode Using Three Cascades SCR o o o 000 R85N 3 76 A AS A 16 4 1 e 7 e 7 o o o o Temperature Sensor Feedback Mode Using Cascade 1 gO QUO o o o jo jo 0 o E gt 015541 DO2 ols Lo o o 01810 Heating Power Output Maintenance Mode Using Cascade 1 O T C R 0 X sie Heating Power Output Fi ofo Maintenance Mode Using Three eo Saus Q 100mA CXS Cascades 4 lt gt 7 6 5 olle Q
30. x400 27 0 3U 700 720 924 400 420 440 530 21 0 700x400 36 0 3U 700 720 924 400 420 440 750 28 0 800x500 27 0 3U 800 820 1024 500 520 540 410 20 6 800x500 36 0 3U 800 820 1024 500 520 540 530 25 9 800x500 54 0 3U 800 820 1024 500 520 540 750 36 1 900x500 45 0 3U 900 920 1130 500 520 540 750 334 900x500 54 0 3U 900 920 1130 500 520 540 750 35 0 1000x500 45 0 3U 1000 1020 1230 500 520 540 750 35 5 NK 1000x500 54 0 3U 1000 1020 1230 500 520 540 750 41 2 DESIGN AND OPERATING LOGIC NKU HEATER WITH A BUILT IN TEMPERATURE CONTROL UNIT FOR ROUND DUCTS The heater casing has a rigidly mounted junction box protected with a removable lid The front panel of the junction box has the electronic thermostat control knob with a temperature scale The heater is equipped with a temperature sensor built into the air duct The sensing element is encapsulated in an aluminium tube protecting it against mechanical damage The rear panel of the junction box has a sealed lead in for the heater feed lines and the grounding conductor The heater casing encloses electic heating elments The heater casing junction box and protective lid are made of galvanized steel The junction box contains the following components Fasteners for the heating elements Electrical components for the power mains connection The terminal block for connecting the external feed lines of the heater Grounding screw clamp Manual reset thermoswitch Electroni
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