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CONNECTION TO POWER MAINS
ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED
AND WILL VOID THE WARRANTY.
DISCONNECT THE POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
CONNECTION OF THE UNIT TO POWER MAINS IS ALLOWED BY A QUALIFIED
ELECTRICIAN WITH A WORK PERMIT FOR THE ELECTRIC UNITS UP TO 1000 V AFTER
CAREFUL READING OF THE PRESENT USER’S MANUAL.
THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE GIVEN ON THE
MANUFACTURER’S LABEL.
The fan is designed for 220-240 V, 50 Hz/220 V, 60 Hz single-phase alternating current mains.
The fan shall be connected to power supply by means of insulated, durable and thermal-resistant cords (cables, wires) through the
external circuit breaker with a thermal-magnetic trip built into the stationary wiring to disconnect all the power mains phases. The rated
current must be not below the rated current consumption (refer to the «Technical data» section). The QF external switch location must
ensure free access for quick shutdown of the fan.
The recommended rated current of the circuit breaker:
• 2 A for the VKM 355 Q fans
• 3.15 A for the VKM 400, VKM 450 fans
• 1 A for all other fans
The recommended wire cross section is minimum 0.75 mm
2
.
The actual conductor cross-section selection must be based on its type, maximum permissible heating, insulation, length and installation
method (in the air, pipes or inside walls). Connect the cables to the terminal block incorporated inside the terminal box located on the
fan casing in compliance with the fan wiring diagram and the terminal designation. The terminal designations are shown on the sticker
inside terminal block of course.
The wiring diagram for the VKM 400, VKM 450 fans is shown in Fig. 2. The wiring diagram for the other fans is shown in Fig. 3.
The fans with a speed controller and temperature and speed controller (VKM Un) are designed for connection to single-phase AC power
mains 220-240 V, 50 Hz/220 V, 60 Hz and are equipped with a power cord and a plug (supplied connected to the terminal block).
Fig. 2
Fig. 3
The TW1, TW2 terminals are the electrical leads of the normally closed contact of the motor overheating protection.
Connect the contact in series to power circuit of the magnetic starter coil KM1 that starts the motor after pressing the S1 button.
In case of pressing the S2 button or motor overheating, the contact gets broken and switches the starter coil off to cut power off and
stop the motor. The QF circuit breaker, the magnetic starter KM1, the control knobs S1 and S2 are not included in the delivery and must
be installed by the user.
The motor connection example with thermal protecting contacts leaded outside are shown in Fig. 4.
Содержание VKM 100
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