Serie SPV - Rohrventilator

APPLICATION

DESIGN

The fan casing is made of aluzinc. A heat and sound insulating layer is made of polystyrene foam.

MOTOR

The impeller with forward curved blades is made of galvanized steel and is powered by a 2 or 4-pole external rotor asynchronous motor. The motor is equipped with ball bearings for a long service life. For precise features, safe operation and low noise, each impeller is dynamically balanced during assembly. Motor protection rating IP 44.

SPEED CONTROL

Smooth or step speed control via a thyristor or autotransformer speed controller. Several fans may be connected to one speed controller provided that the total power and operating current do not exceed the rated speed controller parameters.

MOUNTING

Connection pipes have round section. The basic fan model is supplied with a power cord without a plug.  The power cord and plug are available on a separate order. Electric connection and mounting should be performed in compliance with the operation manual and wiring diagram.

FAN WITH ELECTRONIC TEMPERATURE AND CONTROL MODULE

CONTROL  LOGIC OF THE FAN WITH ELECTRONIC TEMPERATURE AND SPEED CONTROL MODULE

Set the desired air temperature (thermostat set point) by turning the thermostat control knob. Set the required minimum impeller speed (air flow) by turning the speed control knob. The motor switches to maximum speed (maximum air flow) as the temperature reaches and exceeds the set temperature set point. The motor switches to the preset lower speed as the temperature drops below the temperature set point. To avoid frequent motor speed switches when the air temperature in the duct is equal to the set temperature point, the speed switch delay is activated. There are two switch delay patterns for various cases:  1. The temperature sensor-based switch delay, the motor switches to a higher speed as the air temperature exceeds 2°C above the thermostat set point. The motor reverts to the preset lower speed as the air temperature drops below the thermostat set point. This pattern is used to keep the air temperature to within 2°C. In this case, motor speed switches are rare. 2. The timer-based switch delay. As the air temperature exceeds the thermostat set point, the motor switches to a higher speed and the switch delay timer is activated for 5 min. The motor reverts to a lower speed as the air temperature drops below the thermostat set point and only after 5 minutes of timer countdown. This pattern is used for exact air temperature control. The speed switches for the fan with this option are more frequent as compared to the operating logic of the fan with first option, however the minimum operating cycle at one speed is 5 minutes.

MODIFICATION

T - speed controller with electric thermostat and temperature sensor integrated in to the air duct

CUSTOMS CODE: 84145925