Nederman S-Series, Installation & Operation Manual

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ELECTRICAL INSTALLATION, WIRING AND TROUBLESHOOTING
Nederman Customer Service & Technical Support techsupport.us@nedermen.com +1 (336) 821-0800
7
Section 4.0 – Troubleshooting
1) Are Wire
‐
Nuts used in the motor junction box?
Remove and dispose of the wire
‐
nut as they (and soldered connections) are prohibited for motor
connections per NFPA 79, 13.5.9.2. Crimp connections, lugs & split
‐
bolts, Polaris connectors, or some
other acceptable connection method must be used.
2) Motor starts but will not turn over?
Set the overload adjustment dial as close to the O/L Setting in the Motor Circuit Sizing Tables for the
respective series of filter and voltage. Move trip class up incrementally until overload does not trip on
start. This is different than the overload adjustment. (These are 10A, 10, 20, and 30)
3) Is the circuit breaker or fuse
‐
protection sized according to the 1/3
‐
Phase Motor Circuit Sizing Table?
Ensure the circuit protection is sized appropriately per section 2.0 for the filter model.
4) Are the supply conductors the correct size according to the 1/3
‐
Phase Motor Circuit Sizing Table?
Please confirm correct sizing. If the length between the starter and the motor exceeds 150
‐
feet, consider
upsizing the conductors 1 size to account for voltage drop in the conductors. Consult your Licensed
Electrician about the voltage drop.
5) Is the contactor not pulling in? Is the contactor “chattering?” Is it making an odd sound?
Verify Contactor Voltage (look on top of contactor for the A1 & A2 connection block.
The voltage label will be 200
‐
240v (for 208v, 230v, & 240v) or 440
‐
480v (for 460v and 480v)
6) Does the motor spin freely by hand?
If not, there is a problem with the motor. Contact Nederman to order a replacement.
7) Is ductwork connected?
Ensure that all ductwork is connected to the fan. If not, block the fan intake by 1/2. It is important to
introduce static resistance to the airflow. Otherwise, the motor will over
‐
amp & potentially fault.
Note: Continue to the next page if none of these options correct the problem.