STULZ CyberRow Chilled Water Series Installation, Operation & Maintenance Manual
(
Dec.
, 2013)
4.1.1 Features
4.1.1.1 Field
Confi gurable
The program for the
E2
Series controller is fi eld
confi gurable, allowing the operator the capability of
selecting control parameters and set points specifi c to the
application. Operator interface for the
E2
controller is
provided via a door mounted user interface display panel.
The display panel has a backlit LCD graphical display
and function keys giving the user complete control and
monitoring capability of the precision cooling system. The
menu driven interface provides users the ability to scroll
through and enter various menu loops. Monitoring of room
conditions and A/C system operation is allowed without
entering a password. Modifi cations to the control set
points require the use of a password.
4.1.1.2 Password
Protection
Access to the
Info
menu and
Alarms
log is allowed without
the use of a password. The controller is programmed to
recognize predetermined security levels before allowing access
to display screens containing critical variables. Three secured
menu levels (
Control
,
Service
and
Factory
) support unique
passwords that must be entered to access the menu screens
so only authorized personnel may perform modifi cations to
the settings.
4.1.1.3
Restorable Setpoint Parameters
Upon initial start-up the A/C system operates using the set
points programmed by the factory. The customer may enter
new operating parameters in the Control menu and the
system will then operate accordingly. The new set points
may be stored as Customer Default set points. The primary
set points entered by the factory still remain stored in the
controllers' memory as Factory set points.
The set points for the system may be re-adjusted in the
Control menu at any time. If it becomes necessary, the
customer may restore the set points back to the Customer
Default setpoint values or to the original Factory (primary)
setpoint values in the Service menu ( See Section 4.5.5.10).
4-1
4.0
E²
CONTROLLER
4.1 General
The advanced microprocessor based,
E2
Series controller
is a highly versatile and fl exible A/C system controller. It is
designed primarily for STULZ Precision Air Conditioners.
The controller is equipped with fl exible software capable
of meeting the specifi c needs of the application. The
controller is completely programmed at the factory and
therefore, most applications will require no fi eld set up.
However, the default set points and their ranges are easily
viewed and adjusted from the user interface display. The
program and operating parameters are permanently stored
on FLASH-MEMORY in case of power failure.
The
E2
Series controller is designed to manage
temperature and humidity levels to user defi ned set points
via control output signals to the A/C system. Control
parameters have variable outputs from 0 to 100% of the
full rated capacity. The controller continually receives
inputs for the measurable control conditions (temperature
and relative humidity) via sensors installed in the cabinet.
The internal logic determines if the conditions require
cooling, humidifi cation or dehumidifi cation. Control set
points are established to maintain the room's designed
conditions. The controller responds accordingly to changes
and controls the output(s) to the air conditioning system
so temperature/humidity conditions reach the user defi ned
control set points.
