Installation Manual Submersible Sewage Pumps LE and LEH-Series Models LE40-Series 4/10 hp LE50-Series 1/2 hp LE70-Series 3/4 hp LE100-Series 1 hp LEH100-Series 1 hp LEH150-Series 1-1/2 hp LEH200-Series 2 hp 7000 Apple Tree Avenue Bergen, NY 14416 ph: 800-543-2550 fax: 585-494-1839 www.LibertyPumps.com Copyright © Liberty Pumps, Inc. 2019 All rights reserved.
Contents Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 | EN General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 | EN Operating Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 | EN Model Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 | EN Inspection and Storage . . . . . .
Safety Precautions RISK OF ELECTRIC SHOCK Accidental contact with electrically live parts, items, fluid, or water can cause serious injury or death. Always disconnect pump(s) from power source(s) before handling or making any adjustments to either the pump(s), the pump system, or the control panel. All installation and maintenance of pumps, controls, protection devices, and general wiring shall be done by qualified personnel.
Do not remove any tags or labels from the pump or its cord. Keep clear of suction and discharge openings. To prevent injury, never insert fingers into pump while it is connected to a power source. Do not use this product with flammable, explosive, or corrosive fluids. Do not use in a flammable and/or explosive atmosphere as serious injury or death could result. This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. www.
Storage Before Use RISK OF ELECTRIC SHOCK Protect the power and control cords from the environment. Unprotected power and control (switch) cords can allow water to wick through ends into pump or switch housings, causing surroundings to become energized. At no time shall the pump be stored within an incomplete wet basin. The pump shall not be placed into the basin until it can be fully operational. Do not allow the pump to freeze. Pumps are shipped from the factory ready for installation and use.
Prepare New Sump [Basin] Float Switch Settings Table 1 includes factory set float levels for automatic models. The turn OFF level must be maintained as it is the minimum water depth to ensure proper cooling. Manual pumps have user set turn ON levels. RISK OF SERIOUS INJURY OR DEATH Locate all overhead and underground utilities before excavating. Table 1. Factory Set Float Switch Settings Model Series Turn OFF Level Turn ON Level LE40 7” 15” LE41AV 5.5” 11” LE50 6” 14” LE51AV 5.
Electrical Connections Discharge With main power disconnected, complete pump and control wiring connections per manufacturer’s wiring diagrams included with the control panel as applicable. Once connections are made, all wires should be checked for unintentional grounds. A check valve is required to prevent the backflow of liquid after each pumping cycle. A gate valve should follow the check valve to allow periodic cleaning of the check valve or removal of the pump.
Piggyback Switch Operation Applications RISK OF ELECTRIC SHOCK Single-phase 208/230V pumps shall only be operated without the float switch by using the circuit breaker or panel disconnect. A securable basin cover is required for safety and to prevent foreign objects from entering the basin. Simplex (One Pump) Systems IMPORTANT: Verify breaker is turned off before plugging in the switch. Vent Union Check Valve Plug the piggyback switch into the receptacle.
Duplex (Two Pump) Systems Discharge Tee Gate Valve Gate Valve Leads to Control Panel 8. The remainder of the discharge line should be as short as possible with a minimum number of turns to minimize friction head loss. Larger pipe sizes may be required to eliminate friction head loss over long runs. 9. Vent basin in accordance with applicable plumbing codes. Operation Check Valves Unions Vent Starting System 1. Verify all plumbing components are installed correctly and functional.
Maintenance Troubleshooting Check pump frequently for debris and/or build up that may interfere with pump or float switch operation. As the motor is oil-filled, no lubrication or other maintenance is required. No repair work shall be carried out during the warranty period without prior factory approval. To do so may void the warranty. In the event the pump becomes clogged, the inlet screen can be removed to gain access to the pump impeller.
Table 2. Troubleshooting Matrix (continued) Problem Pump cycles too frequently. Pump runs periodically when fixtures are not in use. Pump does not deliver proper capacity. Pump operates noisily. Repeated tripping. 7034000M Possible Cause Corrective Action Improper float switch setting. Adjust float switch setting. Check valve not installed, stuck open, or leaking. Install check valve(s); remove check valve and examine for freedom of operation and proper installation.
Warranty Liberty Pumps Wholesale Products Limited Warranty Liberty Pumps, Inc. warrants that Liberty Pumps wholesale products are free from all factory defects in material and workmanship for a period of three (3) years from the date of purchase (excluding batteries). The date of purchase shall be determined by a dated sales receipt noting the model and serial number of the pump.
