GRUNDFOS INSTRUCTIONS Unilift AP12, AP35, AP50 Installation and operating instructions
English (US) English (US) Installation and operating instructions Original installation and operating instructions These installation and operating instructions describe Grundfos Unilift AP12, AP35 and AP50. Sections 1-5 give the information necessary to be able to unpack, install and start up the product in a safe way. Sections 6-10 give important information about the product, as well as information on service, fault finding and disposal of the product. Prior to installation, read this document.
Products manufactured by Grundfos Pumps Corporation (Grundfos) are warranted to the original user only to be free of defects in material and workmanship for a period of 24 months from date of installation, but not more than 30 months from date of manufacture. Grundfos' liability under this warranty shall be limited to repairing or replacing at Grundfos' option, without charge, F.O.B. Grundfos' factory or authorized service station, any product of Grundfos manufacture.
Outlet port DANGER Handle with clamp Electric shock Death or serious personal injury - The installation, electrical connection, and maintenance of the product must be carried out by an authorized electrician in accordance with the National Electrical Code and any state, local governing codes and regulations. Pump sleeve Float switch Inlet strainer Fig. 1 TM03 6189 4406 English (US) 4. Installing the product 2.2 Overview drawing Unilift AP pump 3.
English (US) DANGER ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹
The difference in level between start and stop can be adjusted by changing the free cable length between the float switch and the pump handle. • An increased free cable length will result in fewer starts and stops and a large difference in level. • A reduced free cable length will result in more frequent starts and stops and a small difference in level. The free cable length must be a minimum of 4 in. (100 mm) and a maximum of 14 in. (355 mm).
Float-switch plug ("piggy-back") Fig. 6 Pump plug TM03 4461 2106 Wall socket Pump and float-switch plugs Motor connections Fig. 7 TM06 9144 1717 Yellow/green Green Blue White Brown Black Power supply cable leads Wiring diagram 5. Starting up the product English (US) Power supply • 1 x 115 V, 60 Hz • 1 x 230 V, 60 Hz. To connect the pump for manual operation, insert the pump plug into a wall socket. If a float switch is included for automatic operation, it will be of the "piggy-back" design.
English (US) 6. Product introduction The Grundfos Unilift AP pump is a single-stage, submersible pump designed for the pumping of wastewater. The pump is designed for automatic operation with a float switch or for manual operation. The pump can be installed in a permanent installation or used as a portable pump. 6.1 Applications DANGER Electric shock Death or serious personal injury - Do not use the pump in or at swimming pools, garden ponds, etc. when there are persons in the water.
* AP12 AP35 AP50 Pumping of gray wastewater with impurities up to the sizes listed in the section Maximum particle size on page 14, and according to the liquid temperature, viscosity and pH value the pump is designed for. ● ● ● Mobile use to dewater ponds, pools, flooded basements and other similar applications. ● ● ● Stationary installation in collecting tanks, sump wells and pits to dewater domestic wastewater (gray wastewater) from showers, washing machines, sinks, bath tubs etc.
6.3 Functions 6.2.1 Nameplate Pump with float switch Automatic start and stop. Pump without float switch Manual external start and stop. Type: UNILIFT AP XX.XX.XX.XX Prod. No: XXXXXXXX 6.4 Pump construction U: 1x115V~60Hz Imax: 8,00 A n: XXXX min-1 P1: X,XX hp XX,X lb Qmax: XX gal/min TM06 9617 2517 English (US) 6.2 Identification Hmax: XX ft MADE IN HUNGARY P.c: XXXX Fig. 8 The main components of the pump appear from the table below and figures A, B and C in the Appendix. See page 15. Pos.
DANGER Electric shock Death or serious personal injury - Switch off the power supply before starting any work on the product. Make sure that the power supply cannot be accidentally switched on. CAUTION Biological hazard Minor or moderate personal injury - Before carrying out maintenance and service, flush the pump thoroughly with clean water. - After dismantling the pump, rinse the pump parts in clean water. CAUTION Sharp element Clean the pump before service. See section 7.1 Cleaning the pump.
English (US) 7.1 Cleaning the pump 7.2 Contaminated pumps If the pump does not deliver a sufficient quantity of water because of sediment, dismantle and clean the pump. To dismantle the pump, follow this procedure: 1. Disconnect the power supply. 2. Lift the pump out of the liquid and allow it to drain. 3. Carefully loosen the inlet strainer (84) by inserting a screwdriver through one of the holes of the strainer and press it downward. Repeat the procedure until the strainer is free and can be removed.
English (US) 8. Fault finding the product DANGER Electric shock Death or serious personal injury - Switch off the power supply before starting any work on the product. Make sure that the power supply cannot be accidentally switched on. Fault Cause Remedy 1. a) No power supply. Connect the power supply. b) The motor is switched off by the float switch. Adjust or replace the float switch. c) The fuses are blown. Replace the fuses. d) The motor protection or thermal relay has tripped.
English (US) Fault Cause Remedy 4. a) The pump is blocked by impurities. Clean the pump. See section 7.1 Cleaning the pump. b) The outlet pipe or the non-return valve is blocked by impurities. Clean the outlet pipe or the nonreturn valve. c) The impeller is not properly fixed to the shaft. Tighten the impeller. d) Air is trapped in the pump. e) The liquid level is too low. The inlet strainer is not completely submerged in the pumped liquid.
1 Fig. A: Unilift AP12 Fig. B: Unilift AP35 Fig.
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