Maintenance – Liberty Pumps 290-Series User Manual

Page 8

If a single phase pump is to be wired directly into a control device or junction box, and it is necessary to remove the plugs,

have a certified electrician do the wiring in accordance with the National Electric Code and applicable local codes. See

Fig. 6 for direct wire installation of single phase, automatic pumps.

For 208-230V installations: Install a double pole disconnect near the pump installation. One side of

the line going to the pump is always “hot”, whether the float switch is in the “On” or the “Off” position.

Use of a double pole disconnect will allow both hot legs to be de-energized.

Risk of electric shock. Always disconnect the pump from the power source before handling or

making adjustments.

Always disconnect the pump from power source before handling. This guide is designed to help

identify reasons for potential operating problems. It is not a service guide.

Dismantling of pump

voids warranty. Servicing of pump other than simple cleaning of pump inlet or impeller should be

referred to the factory or its authorized service centers.

Submersible Models: Submersible pump models have sealed permanently lubricated bearings and require

no additional lubrication.

Pump should be checked frequently for debris and/or build up which may interfere with pump or float

switch operation. The float must be able to move freely through its complete travel without any restrictions.

Pour enough water into the sump to activate the pump periodically (at least every 3 months) when not

normally in use to verify proper function.

5. Maintenance

Fig. 6 – Direct Wiring of 120V or 208-230V Single

Phase, Automatic Pumps

NOTE: The manufacturer assumes no responsibility for damage or injury due to disassembly in the field.