Installation Manual 4617000L LowPro-Series Low Profile Sewage System Models LowPro41LP 4/10 hp, 115V LowPro51LP 1/2 hp, 115V LowPro52LP 1/2 hp, 230V Features • Fully assembled at factory • 2" Solids handling sewage pump 7000 Apple Tree Avenue Bergen, NY 14416 ph: 800-543-2550 fax: 585-494-1839 www.LibertyPumps.com This product supplied with a CSA Certified pump. Copyright © Liberty Pumps, Inc. 2019 All rights reserved.
Contents Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 | EN General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 | EN Model Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 | EN Inspection and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 | EN Pump Design . . . . . . . . . . . . .
Safety Precautions RISK OF ELECTRIC SHOCK Accidental contact with electrically live parts, items, fluid, or water can cause serious injury or death. Always disconnect the pump from power source before attempting to service the pump. Fatal electrical shock could occur. The pump shall be plugged into a properly fused electrical outlet with a ground fault circuit interrupter (GFCI) that conforms to current National Electric Code (NEC) and all applicable local codes.
Do not use pumps with fluid over 140°F (60°C). Operating the pump in fluid above this temperature can overheat the pump, resulting in pump failure. Do not use an air admittance valve or a mechanical spring-loaded venting device. List of included parts: Closet Flange Extension Kit Check Valve Do not allow pump to freeze. Do not use pump system with mud, sand, cement, hydrocarbons, grease, or chemicals.
Dimensional Data Cords LowPro systems come with two cords—one to the float switch and the other to the pump motor. The float switch cord has a piggyback (series) plug enabling the pump motor cord to be plugged into the back of it. Both cords must be connected in series for automatic operation. TOP VIEW 12-1/2” 17” [30.5 cm] [43 cm] 24-1/2” [62 cm] NO! YES! Temporary Manual Operation 12-1/4” 7” [31 cm] The purpose of this design is to allow temporary manual operation of the pump.
. Attach the 2” check valve to the discharge pipe as close to the top of the tank as possible. Make sure that the arrow on the check valve is pointing up, away from the pump. Do not reduce the discharge pipe size below 2". 7. Complete the discharge piping to the house waste line using a minimum number of turns. 8. Install a 2" vent pipe into the vent opening on the cover. 9. Connect the vent pipe to the house vent line or directly to the atmosphere.
Float Switch Adjustment Troubleshooting Refer to the diagram to adjust the float switch. The pump should engage at a waste depth of approximately 4” and pump down to around 3”. No repair work shall be carried out during the warranty period without prior factory approval. To do so may void the warranty. Liberty Pumps, Inc. assumes no responsibility for damage or injury due to disassembly in the field. Disassembly, other than at Liberty Pumps or its authorized service centers, automatically voids warranty.
Table 1. Troubleshooting Matrix (continued) Problem Pump does not deliver proper capacity. Pump operates noisily. Repeated tripping. Possible Cause Corrective Action Discharge partially closed or clogged. Check the discharge line for foreign material, including ice if the discharge line passes through or into cold areas. Check valve partially clogged. Raise liquid level up and down to clear; remove check valve to remove obstruction. Total head (lift height) is beyond pump's capability.
