LEYBOLD Trivac D30A User Manual

Step a(2) (Cont'd)
(h) Check if the fan on the rear end of the motor is rotating in the correct direc·
tion. Looking from the fan end of the motor, the fan and motor shaft should
be rotating clockwise (see Figure 5· 15).
Turn off the motor and disconnect the power supply. (c)
(d)
If the rotation direction is incorrect, reverse it by interchanging the electrical
line
connection at the motor end, then repeat Steps a(2) (a) through a(2) (c)
above.
For 3·phase motors, correct the direction of rotation by interchanging
any two of the three phases.
b. Steps b(1) and b(2) below apply only to D30A, D60A, and D90A pump models with three
phase motors.
(1) If the pump has a new motor supplied by Leybold, a rotational lock bearing has
been
correctly installed at the factory to prevent the motor from rotating in the wrong
direction. In this case, check the wiring of the motor as follows:
CAUTION: FAILURE TO IMMEDIATELY TURN OFF THE MOTOR IF THE MO·
TOR FAN DOES NOT ROTATE COULD RESULT IN DAMAGE TO THE MOTOR
AND THE PUMP.
(a) Connect the power supply and turn the motor on.
(b) Check if the fan on the rear end of the motor (see Figure 5· 15) rotates.
(c) Turn off the motor and disconnect the power supply.
(d) If the fan did not rotate, correct the motor wiring by interchanging any two
of the three phases; then repeat Steps b(1) (a) through b(1) (c).
(2) If the motor was not supplied through Leybold or the pump has an old Leybold
supplied motor, grab the motor shaft or motor fan and attempt to turn it clock·
wise and then counterclockwise; then proceed as follows:
CORRECTLY INSTALLED LOCK BEARING
Looking
from the fan end of the motor, if the fan or shaft will turn clockwise and will
not turn counterclockwise, the pump has a correctly installed rotational lock bearing.
In this case, do Steps b(1) (al through b(1l (dl to check the wiring.
LOCK BEARING INSTALLED BACKWARDS
Looking
from the fan end of the motor, if the fan or shaft will turn counterclockwise
and will not turn clockwise, the rotational lock bearing is installed backwards. In this
case,
do Steps b(2) (a) through b(2) (s), which follow, to disassemble the motor and
install the lock bearing correctly.
NO LOCK BEARING OR MALFUNCTIONING LOCK BEARING
If the fan or shaft will rotate in both directions, we recommend installing a rotational
lock bearing. (See Steps b(2) (a) through b(2) (s).) If you have insufficient time to
order and install a rotational lock bearing now, do Steps a(2J (a) through a(2) (d) to
ensure correct rotation of the motor; then order and install a rotational lock bearing as
soon as possible.
Proceed as follows to install a rotational lock bearing (see Figure 5-17). Note that the ro-
tational lock bearing is installed on the fan end of the motor for all pump models except
for D60A/D90A pump models with Marathon motors. The lock bearing on D60AID90A's
with
Marathon motors is installed on the shaft end.
NOTE: Catalog numbers for the required parts and materials are listed in Table 5·2.
NOTE: If the motor is attached to the pump, remove the motor before proceeding
with Steps (a) through (s).
TRIVAC ''A II Manual, Edition L
(a) Unscrew and remove the screws that attach the fan cover to the end of the
motor. Remove the fan cover.
31

LEYBOLD Trivac D30A Specifications

General

Brand	LEYBOLD
Model	Trivac D30A
Category	Water Pump
Language	English