Fan - CIAT Climaciat Instruction Manual

9.4 Fan

9.4.1 Network voltage
ƒ Make sure the network voltage matches that shown on the data plate, and that it is within the permissible tolerances.
ƒ For a 400 V/50 Hz network, voltage tolerance +-10%.
ƒ The phase unbalance must not exceed 2% for voltage and 10% for current.
9.4.2 Pre-commissioning check
Warning!
Follow the safety instructions (see § 2 - SAFETY INSTRUCTIONS).
When working inside the unit, make sure that the motors are switched off and the fans are not running.
ƒ Before starting up the fans, make sure that the fan block is clean and free from foreign objects.
ƒ Remove all the shipping safety devices (, chocks, etc.)
ƒ Manually check to ensure that the fan rotates correctly without friction or abnormal noises.
ƒ Make sure that the wheel is centred on the intake section. Check the spacing "A". This spacing must be the same around the
entire wheel. The value "B" (coverage of the inlet by the wheel) must be approximately 1% of the wheel diameter.
ƒ Make sure that the impeller is correctly balanced
ƒ Check the tightness of the mountings (AC motors)
ƒ Check the mounting of the fans on the partition (M8 screw, 20 Nm tightening for EC motors)
ƒ Make sure that each outlet and inlet on the block is not obstructed, and that the dampers are open.
ƒ Check the condition and mounting of the protection accessories (e.g. grille option)
ƒ Check the suspension mounts (AC motors)
ƒ Check the condition of the flexible sleeves (AC motors)
ƒ Before use, check the wiring between the variator and the motor or between the distribution unit and the motors
(see § 7 - CONNECTION) and the wiring diagrams provided.
ƒ Check the cleanliness of the fan, as fouling of the blades may cause the fan to become unbalanced, resulting in damage.
ƒ Remove any impurities using a vacuum cleaner and/or a cleaning product.
1
EN - 24
B