Bell & Gossett P2001489 Integrated Technologic with Sensorless Control - Manual (Page 29)

System Setup and Operation
Pre-start procedure
1. Make sure input power to unit is OFF and locked out per OSHA requirements. Do not
rely on panel disconnect switches.
Electrical Hazard:
If input and output connections have been connected improperly,
there is potential for high voltage on these terminals. If power leads for
multiple motors are improperly run in same conduit, there is potential
for leakage current to charge capacitors, even when disconnected
from line input. For initial start up, make no assumptions about power
components. Follow pre-start procedures described below. Failure to
follow pre-start procedures described below could result in personal
injury or damage to equipment.
2. Use an AC voltmeter to verify there is no voltage on input terminals L1, L2, and L3,
phase-to-phase and phase-to-ground, and output terminals T1, T2, and T3, phase-to-
phase, and phase-to-ground.
3. Use an ohmmeter to confirm continuity of the motor by measuring T1–T2, T2–T3, and
T3–T1.
4. Use an ohmmeter to confirm open on input by measuring L1–L2, L2–L3, and L3–L1.
If an isolation transformer is between the power source and panel, continuity will be
present. In this case, visually confirm that motor and power leads are not reversed.
5. Inspect the controller for loose connections on terminals.
6. Check for proper ground: controller to main building distribution ground, and to
motor ground.
7. Confirm control connections are terminated per connection diagrams that are
supplied with the equipment.
8. Check for external devices between drive and motor.
It is recommended that no devices be installed between the motor and drive.
9. Record motor nameplate data; hp, voltage, full load amps (FLA), and RPM. Ensure the
nameplate data matches the drive ratings.
10. Confirm that incoming power matches drive label voltage and motor nameplate
voltage.
11. For multiple winding motors, motors must be wired on run winding Delta, not Y-start
winding.
CAUTION:
EQUIPMENT DAMAGE. If motor FLA (full load amperage) is greater
than unit maximum amps, controller must be replaced with one of
appropriate ratings. Do not attempt to run the unit. Failure to match
FLA to the unit maximum amp rating may result in equipment damage.
12. Confirm that the motor FLA is equal to or less than the maximum controller output
current. Some motors have higher than normal NEMA currents.
System Setup and Operation
Integrated Technologic ® with Sensorless Control INSTRUCTION MANUAL 27