10
MPA
www.ventilation-system.com
CONNECTION TO POWER MAINS
DISCONNECT THE UNIT FROM POWER MAINS PRIOR TO ANY OPERATIONS. THE UNIT
MUST BE CONNECTED TO POWER MAINS BY A QUALIFIED ELECTRICIAN. THE RATED
ELECTRICAL PARAMETERS OF THE UNIT ARE GIVEN ON THE MANUFACTURER’S LABEL.
Model Rated current of the circuit breaker Copper wire cross
section
MPA 800 E1 230 V, 20 A 3x2.5
MPA 1200 EЗ 400 V, 20 A 5x2.5
MPA 1800 EЗ 400 V, 40 A 5x6.0
MPA 2500 EЗ 400 V, 40 A 5x6.0
MPA 3200 EЗ 400 V, 50 A 5x10
MPA 3500 EЗ 400 V, 50 A 5x10
The wire cross sections given in the table are for reference only!
Their selection shall be based on maximum permissible wire heating, which depends on its type, insulation, maximum permissible
current, length of the lead wire and its location (air, wall).
.
Air handling unit
~220-240 V
50 (60) Hz
Air handling unit
~400 V
50 Hz
Single-phase power supply Three-phase power supply
QF – external circuit breaker
XI – terminal block for connecting the wires of the power supply network, as well as external devices - sensors, damper actuator, control
panel, etc.
The automatic circuit breaker location must ensure free access for quick shutdown of the unit.
The required number of wires, their cross-section (mm²), as well as the ratings of the circuit breakers are shown in the table.
ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED
AND WILL VOID THE WARRANTY.
• The unit is rated for connection to 1~220-240 V/50 (60) Hz or 3~400 V/50 Hz power mains according to the wiring diagram.
• The connection must be made using durable, insulated and heat-resistant conductors (cables, wires). The conductor cross-
section selection shall be based on maximum permissible current and maximum permissible wire heating, which depends on
its type, insulation, length and installation method.
• The external power input must be equipped with an automatic circuit breaker QF built into the stationary wiring to open the
circuit in the event of overload or short-circuit. The position of the external automatic circuit breaker must ensure free access
for quick power-off of the unit. The automatic circuit breaker nominal current must exceed the ventilator current consumption,
see the Technical data section or the unit label. It is recommended to select the nominal current of the circuit breaker from the
standard series, following the maximum current of the connected unit. The circuit breaker is not included in the delivery set and
can be ordered separately.
