Vents NK 100-0.6-1 U, Руководство пользователя, Страница: 20 / 24

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NK…U
CONTROL
Connection of NK…U, NK…Un with capacity from 0.6 kW to 2.4 kW
with integrated temperature control module for round air 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 °C to +40 °C.
The heater switches on automatically upon the air temperature dropping below the preset thermostat operation threshold.
When the air warms up to the preset level the heater switches off automatically.
NK…U with capacity from 3.0 kW to 54.0 kW
with a control unit for round and rectangular air 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 [Gnd. PTin. PT+]
• PT+
– sensor power – „brown“
• Gnd
– analogue ground contact – „shield“
• PTin
– sensor signal input – „white“
Jumper 1
(see page 14) sets the heater control method using signals of the external temperature set-point adjuster (the 0–10 V controller) or the
feedback from the built-in temperature controller. 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
• 0–10 V
– set-point adjuster input
Protective contact circuit connection.
The „Start“ signal (the activation signal source device) must be connected to the
X2
terminal block: Enable
[no and s];
The flow sensing element (the supply filter pressure switch) must be connected to the
X2
terminal block:
PD1 [no and s].
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
potentiometer to set the desired temperature in the range from -30 °C to +30 °C.
The NK...U 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 wiring diagram
1 2 3 4 5 6 7 8 9 X2
Thermoresistor
External
temperature
set point adjuster Air flow
sensor
„Start”
signal
tE
TE1 Control PD1 Enable
GND PTin PT+ GND 0-10В no
c no c
0–10 V
controller
Gnd Out E+
shield
whit
e
br
own
TECHNICAL MAINTENANCE
THE UNIT TECHNICAL MAINTENANCE MUST BE PERFORMED BY ADEQUATELY QUALIFIED AND
TRAINED PERSONNEL UPON UNIT DISCONNECTION FROM THE POWER MAINS.
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.
Cleaning with solvents or flammable substances is not allowed.