aermotor FH50 - User Manual

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Shallow Well Jet Pumps/

Tank Systems

INSTALLATION AND OPERATION MANUAL

FH Series Pumps

Horsepower Range: 1/2 and 3/4 H.P.

60 Cycle

Single Phase Installations

Owner’s Record

Pump Model:

Pump Serial No.:

Pump Date Code:

Motor H.P. Voltage Phase

Date of Installation:

Owner:

Installer:

Installer Phone Number:

AERMOTOR

293 Wright St., Delavan, WI 53115

1-262-728-9181

©2008 AER741 (Rev. 2/20/08)

Questions and Answers

T
torreskyleAug 1, 2025
How to troubleshoot aermotor FH50 motor that will not run?
- T
  Timothy YoungAug 2, 2025
  If your Aermotor Water Pump motor isn't running, first ensure the disconnect switch is on. If it still doesn't work, check the fuse and replace it if it's blown, or reset the circuit breaker if it has tripped. Also, examine the starting switch and replace it if defective, after disconnecting the power. Inspect all wires at the motor for looseness, disconnections, or incorrect wiring, making sure to disconnect power before checking and tightening. Lastly, check the pressure switch contacts and file them with an emery board or nail file after disconnecting the power.
P
phessAug 6, 2025
Why does my aermotor FH50 keep cycling too frequently?
- B
  Bonnie TranAug 6, 2025
  If your Aermotor Water Pump delivers water but doesn't shut off or cycles too frequently, first, disconnect the power and adjust or replace the pressure switch. Ensure all faucets are closed. Check for clogs in the venturi, nozzle, or impeller and clean them if necessary. If you have a standard pressure tank, drain it to the air volume control port. Inspect all pipe connections for air leaks and replace any leaking foot valves. Lastly, check the air charge in a pre-charged tank using a tire pressure gauge at the valve stem. If it's less than the pressure switch cut-in setting (30-50 PSI), add air until it's 2 PSI less than the cut-in setting.
J
Jennifer WileyAug 16, 2025
Why am I getting air spurts from the faucets with my Aermotor Water Pump?
- B
  Brandy DeleonAug 16, 2025
  If you're getting air spurts from your faucets with your Aermotor Water Pump, it might be picking up prime; once it does, it should pump solid water without air. Check the suction side of the pump for leaks using soapy water. If the well is gaseous, consult the factory about installing a sleeve in the well. It may also be due to intermittent over-pumping of the well. If water is drawn down below the foot valve, lower the foot valve if possible, or restrict the pump discharge.
S
Seth DiazAug 21, 2025
Why does the aermotor FH50 Water Pump motor run hot and overload kicks off?
- K
  kpottsAug 21, 2025
  If the Aermotor Water Pump motor runs hot and the overload kicks off, refer to the wiring instructions to ensure the motor is wired correctly. Check with the power company to ensure the voltage is not too low. Refer to the section on too frequent cycling.
M
Misty DaughertyAug 27, 2025
Why aermotor FH50 does not deliver water to full capacity?
- A
  Anthony Mathis PhDAug 27, 2025
  If your Aermotor Water Pump isn't delivering water to its full capacity, it could be due to several reasons. If the water level in the well is lower than estimated, a deep well jet will be needed if your well has more than 25’ (7.6M) depth to water. If using steel piping, corrosion or liming might be causing excess friction; replace it with plastic pipe where possible, or with new steel pipe. If the piping is too small, use larger piping. Finally, a packed well point can cause this issue; backflush the well point or sink a new point.
M
Melissa AdamsNov 10, 2025
What to do if aermotor FH50 Water Pump motor runs but no water is delivered?
- T
  Tamara MartinNov 10, 2025
  If your Aermotor Water Pump motor runs but no water is delivered, and it's a new installation, re-prime the pump according to the instructions. Check all connections on the suction line, AVC, and ejector with soapy water or shaving cream for air leaks. Replace the foot valve or check valve if they are leaking. If the installation is already in use, check all connections on the suction line and shaft seal. Lower the suction line into the water and re-prime. Clean the foot valve or strainer if plugged. Also, clean the ejector or impeller if they are plugged. Replace the check valve or foot valve if stuck shut. Thaw pipes if frozen. Raise the foot valve and/or strainer above the bottom of the water source if buried in sand or mud. If the water level is too low for a shallow well setup, a deep...

Summary

Pump Safety Instructions

Key Safety Alerts

Key safety alert symbol and signal words for personal injury prevention.

Electrical Safety Precautions

Electrical hazards and precautions, including capacitor discharge and wiring.

General Operating Safety

General safety guidelines for pump operation, maintenance, and work area.

Pump Installation Guide

Replacing an Old Pump

Steps for removing an old pump and installing a new one, ensuring proper connections.

Well Point Installation

Guide for installing a well point system, including drive couplings and pipe sealing.

Cased Well Installation

Instructions for installing a pump in a cased well, including foot valve and strainer placement.

Surface Water Installation

Procedure for installing the pump for surface water sources, including foot valve and screen.

Discharge and Tank Connections

Pre-Charge Tank Connection

Steps for connecting the pump discharge to a pre-charged pressure tank.

Standard Tank Connection

Procedure for connecting the pump discharge to a standard pressure tank with an air volume control.

Electrical Setup

Motor Voltage Settings

Instructions on setting dual-voltage motors and electrical safety warnings.

Pressure Switch and Wiring Connections

Details on pressure switch wiring, power supply connections, and grounding.

Pump Startup and Priming

Electrical Connection Procedure

Steps for grounding the pump and connecting power supply wires.

Pump Priming and Initial Startup

Guide on how to prime the pump, troubleshoot initial startup, and verify operation.

Pump Repair Parts and Diagrams

Exploded View Diagram

Diagram illustrating the pump components with key numbers for identification.

Repair Parts List

Table listing replacement parts for FH Series pumps by model and horsepower.

Pump Troubleshooting Guide

aermotor FH50 Specifications

General

Model	FH50
Type	Windmill Water Pump
Pump Diameter	5 inches
Pump Stroke	10 inches
Material	Galvanized Steel
Weight	Varies with tower height; approximately 2500-3500 lbs (complete system)

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