Crompton Controls DCM - Manual (Page 8)

Emotron AB 01-2120-01r2 Introduction 7
3 Introduction
This instruction manual describes the installation and commissioning of the
Emotron DCM. The Emotron DCM is a control unit that remotely controls
submersible pump equipment. Level sensors are not needed to initiate start and
stop. The pump stops automatically when it begins to snore (draw air), when
the pit has been pumped free from water. During a pumping operation, the
Emotron DCM measures the length of the run period and uses this to deter-
mine the length of the rest period. The longer the run period, the shorter the
rest period. As a result the run and the rest periods are continuously adapted to
the rate of flow.
Two Emotron DCM can be connected in parallel to control two submersible
pumps and allow independent operation and display of monitored values (see
Chapter 7).
This instruction manual contains complete instructions for the installation and
use of the Emotron DCM. Please read the entire manual before installing or
using the DCM. Pay special attention to the Safety chapter in this manual and
the parts marked WARNING and CAUTION.
3.1 Description
The Emotron DCM measures the input power by measuring voltage and cur-
rent. This gives a reliable measurement of pump motor load over the total load
range.
As an option a level switch can be used to trigger a start; either to override the
pause time in case of high level or as the sole means to trigger a start.
The Emotron DCM is connected to the pump motor supply cable with a type
CTM current transformer. The same Emotron DCM is suitable for small and
large induction pump motors and the only accessory needed is the CTM cur-
rent transformer (a primary standard current transformer is also necessary when
the motor current is greater than 100 A).
The Emotron DCM is enclosed in a recyclable PC/ABS plastic housing. At the
front is the operator’s panel which comprises an LCD display and a set of six
keys. The connection terminals are at the top and bottom of the unit front
panel. The unit should be mounted on a standard DIN-rail.
The Emotron DCM is very easy to use. The “Auto set” function makes it possi-
ble to adjust the unit (stop level) automatically by pressing just one key.