Instruction Manual

Installation/Wiring 1-19
If ethylene glycol is used, the recommended coolant flow rates should be
according to Table 1.D
.
Table 1.D Recommended Coolant Flow Rates with 25% Ethylene Glycol
Biocide
A biocide may be needed to control biological growth. Use of a biocide is
permitted. For specific recommendations, consult a reputable water
treatment company.
Installing Input Power
Wiring
This section describes incoming line components and how to install them.
Installing Transformers and Reactors (Optional)
The LPM15 AC drive may be used on distribution systems with 85,000
amps or less symmetrical fault current capacity. Line reactors are not
needed for safe operation of the drive but may be required to reduce line
harmonics.
Input isolation transformers might be needed to help eliminate:
• Damaging line voltage transients from reaching the drive.
• Line noise from the drive back to the incoming power source.
• Damaging currents that could develop if a point inside the drive becomes
grounded.
Observe the following guidelines when installing an isolation transformer:
• A power-disconnecting device must be installed between the power line
and the primary of the transformer.
• If the power-disconnecting device is a circuit breaker, the circuit breaker
trip rating must be coordinated with the in-rush current (10 to 12 times
full load current) of the transformer.
Installing Fuses for Branch Circuit Protection
Install the required, user-supplied branch circuit protection fuses according
to the applicable local, national, and international codes (e.g., NEC/CEC).
The fuses must be installed in the line before the drive input terminals. See
Figure 1.9
or Figure 1.10. Fuse value selections are provided in Table 1.C.
Frame Flowrate (GPM)
Pressure Drop From Drive
Inlet to Drive Outlet (PSIG)
B11 25
C8 70
D11 25
!
ATTENTION: Most codes require that upstream branch
protection be provided to protect input power wiring. Failure to
observe this precaution could result in severe bodily injury or
loss of life.