Vents VUT 1000 H User Manual - page 12
12
VUT ... H air-handling units must be connected to the power mains in accordance with the wiring diagram and the terminal
designations given inside the terminal box or the control unit:
L
N
PE
QF
X1
N
L
VUT 350 ... 600 H
electrical connections diagram
L
N
PE
QF
VUT 1000 ... 2000 H
electrical connections diagram
Terminal box
Control unit
N
L
Х4
1
2
3
4
5
1
2
3
C B
P3-1-300 speed switch
Control unit
Х4
C
B
L
M
H
1
2
3
C B
P3-1-300 speed switch
All the control and power supply wires must be connected in accordance with the terminal markings. The supply mains wires are
attached to the respective clamps of X1 terminal block (VUT 350 ... 600 H) or X4 (VUT 1000 ... 2000 H).
The automatic circuit breaker with a thermal magnetic trip protects the unit circuit against overloading and shorting.
P3-1-300 speed switch is used to activate and deactivate the unit as well as to select the desired operation speed.
The unit is equipped with a built-in heat exchanger protection system to prevent its freezing in the cold season. If the heat exchanger
freezing becomes imminent a thermostat relay interrupts the supply fan circuit. After the supply fan shuts down automatically the heat
exchanger is warmed up by the stream of warm air from the extract fan. When the heat exchanger has thawed the supply fan activates
automatically. The recommended operating value for the thermostat relay in the absence of a duct heater in the ventilation system
plenum segment is +3 °C (factory setting). To set the thermostat operation temperature turn the control knob until reaching the desired
value.
Pressing the designated keyswitch also turns the supply fan off. The keyswitch is located either on the side panel (VUT 350 ... 600 H)
or on the control unit (VUT 1000 ... 2000 H).
The terminal designation diagram is given on the sticker inside the terminal box or the control unit. The unit terminal screw markings
comply with the respective ones on the electrical diagram.
The cables are routed into the terminal box through a sealed lead-in for electrical hazard class compliance.
UNIT CONTROL
The unit is controlled by means of P3-1-300 speed switch.
Make sure to install the switch in a convenient location. The speed switch is part of the unit delivery set and is factory-connected to
the terminal block located inside the unit control box according the wiring diagram (see Fig. “Wiring diagram”).
To engage the desired speed turn the speed control knob clockwise into one of
the three positions available:
1 — Speed 1;
2 — Speed 2;
3 — Speed 3.
To switch off the unit turn the speed control knob counterclockwise until
reaching the OFF position.
3
O
1
2
3
OFF