Instruction manual
INSTRUCTION MANUAL
for „DELTAFAN” wall fans of the type: ***/R/*-*/**/***/Ex
Page 11/14
6.1 THE SMALL INSPECTION
visual inspection, and motor and protection equipment cleaning without disassembly, as long as the
inspection does not necessitate it,
resistance measurement of motor winding isolation,
efficiency measurement of resetting or protection connection resistance,
resistance measurement of power supply cable isolation,
checking the correct setting of overload protection,
discharge the condensate:
o pull out the rubber plug from the drain hole in both plates to discharge water and re-plug both holes.
6.2 THE MAIN INSPECTION
motor removal consisting in performing the below activities in the following order:
o unscrew the three screws mounting the fan cover,
o removal of the fan from the shaft using a puller,
o unscrew the three bolts holding bearing plates,
o removal of bearing plates using special pullers or by lightly tapping the protruding plate logs with a
wooden hammer,
o removal of the rotor with bearings,
o removal of bearing from the motor shaft using three-arm pullers – only when it is necessary to replace
them.
Bearings should be absolutely replaced after 40000 motor working hours.
Double-sidedly closed ball bearings (2Z) that do not require grease filling are used in the motor (bearings are
factory greased by the manufacturer).
Motor Bearing type
63 63 6202 2Z
71 71 6203 2Z
80 80 6204 2Z
checking the stator winding condition, which should be carefully cleaned and blown out with compressed
air; winding faces cannot have damaged spots, faces must be well stiffened; if necessary they should be
coated with an electric isolation paint without solvent PK-155 and well dried in the temperature below 373 K
(+ 100°C),
check the isolation resistance between particular winding phases and between the winding and motor
housing,
check the correct setting of the motor overload protection,
it is forbidden to replace any motor elements and make any modification. If a repair is necessary (motor
rewinding), it can be done by the manufacturer or a authorised company,
the motor should be installed in the reverse order.