E-one Extreme DH071 User Manual

Introduction 1–2
Basic Operation
The grinder pump is designed to grind and pump domestic sewage. The pump is a semi-
positive displacement, progressing cavity pump. The grinder pump consists of a pump
assembly with an integral sewage grinder and shredder device. The pump traps a column
of air in the sensing bell for the on-off pressure switch. When water in the tank reaches the
normal turn-on level, the pressure in the sensing line closes the electrical contact points. The
relay coil is energized and the relay contact points close, providing electrical power to the
pump motor. When the motor starts and runs, the grinder pulverizes any solids. The slurry is
then pumped until the liquid in the tank is lowered to the shut-off level. This reduces pressure
on the diaphragm of the on-off switch, which opens the electrical contacts and removes power
from the motor.
In the event of a pump failure, the liquid in the basin rises and activates an alarm pressure
switch. The electrical contacts close, activating the alarm indicator (light and/or buzzer). The
alarm alerts the homeowner about a pump problem.
Safety Warnings
A Caution statement in this manual designates a situation that could cause equipment failure
or damage. Follow the proper safety procedures as described in the instructions.
A Warning statement in this manual designates a situation that can cause bodily harm and/or
equipment damage. Follow the proper safety procedures as described in the instructions.

E-one Extreme DH071 Specifications

General

Brand	E-one
Model	Extreme DH071
Category	Water Pump
Language	English