Stulz E2 pluS Series User manual

E2pluS Series
Microprocessor Controller
Installation, Operation and Maintenance Manual
For E2pluS Controller used with
CyberWall Air Handlers

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05.11.23 © STULZ USA – all rights reserved
E2PLUS SERIES CONTROLLER INSTALLATION, OPERATION & MAINTENANCE MANUAL
ABOUT STULZ
Since it was founded in 1947, the STULZ company has
evolved into one of the world’s leading system suppliers of
computer room air conditioners and air handlers.
STULZ has seen continual international expansion of its
precision cooling business, specialising in temperature and
humidity control for data centers and telecommunications
installations.
STULZ has ten production plants (2 in Germany, 2 in
the USA, Italy, Great Britain, Spain, 2 in China, Brazil and
India) and twenty subsidiaries (in Germany, USA, France,
Italy, Great Britain, Belgium, Brazil, the Netherlands, New
Zealand, Mexico, Austria, Poland, Spain, Singapore, China,
India, Indonesia, South Africa, Sweden, and Australia).
STULZ works with sales and service partners in over 140
other countries, and therefore boasts an international
network of cooling specialists.

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© STULZ USA – all rights reserved 05.11.23
E2PLUS SERIES CONTROLLER INSTALLATION, OPERATION & MAINTENANCE MANUAL
The Benchmark of Flexibility and
Energy Efficiency
This document contains information protected by copyright. All rights are reserved. The owner of the
equipment for which this manual is written may photocopythe contents ofthis manual for internal use only.
No part ofthis document may be photocopied, reproduced, or translated into another language for use
by anyone other than the owner of the equipment forwhich this manual is written without the prior written
consent of STULZ AirTechnology Systems, Inc.
This document contains confidential and proprietary information of STULZ AirTechnology Systems, Inc.
Distributing or photocopying this document for external distribution is in direct violation of U.S. copyright
laws and is strictly prohibited without the express written consent of STULZ.
Unpublished rights reserved under the copyright laws of the United States and of other countries. Other
brands and trade names are trademarks of their respective owners.
Copyright © 2023 by STULZ AirTechnology Systems, Inc.
Printed in the United States ofAmerica.
All rights reserved.
STULZ Air Technology Systems, Inc.
1572 Tilco Drive
Frederick, MD 21704, USA
www.stulz-usa.com

Contents
GENERAL INFORMATION .............................................................................. 5
DESCRIPTION ................................................................................................ 7
START UP......................................................................................................11
OPERATION..................................................................................................15
MENU SCREENS ..........................................................................................18
CONTROLLER COMMUNICATION ...............................................................34
MAINTENANCE & REPAIRS .........................................................................38
PRODUCT SUPPORT....................................................................................39
BMS POINTS LIST ........................................................................................41
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05.11.23 © STULZ USA – all rights reserved
E2PLUS SERIES CONTROLLER INSTALLATION, OPERATION & MAINTENANCE MANUAL

GENERAL INFORMATION
Forward
The microprocessor based STULZ E2pluS Series Controller documented in this manual uses state-of-the-art control
technology. This manual applies specifically to the STULZ E2pluS Series Controllersoftware configured for the CAH
CyberWall units listed on the title page. It contains information for the operation of the controller.
NOTE:
The controller software is configured with a definition of the hardware components present in the CyberWall.
This definition largely governs the E2pluS Controller screens that are displayed. Certain optional hardware can
be added to your unit and enabled by changing the hardware definition. This manual does not document these
options or their corresponding screens, alarms and BMS parameters. Only features in the factory-delivered
CyberWall unit are documented.
Spare parts are available from STULZ to ensure continuous operation. Using substitute parts or bypassing electrical
components is not recommended and will void the warranty. Due to technological advancements, components are
subject to change without notice.
STULZ E2pluS Series Controllers are designed primarilyto preciselyoperate, control and monitor STULZ CyberWall
systems. Anyuse beyondthis is deemed to be not intended. STULZ is not liableforanydamage resulting from improper
use. All STULZ E2pluS Series Controllers are designed for indoor use.
Humidity Data
The E2pluS Controller monitors humidity levels in the return air stream. Alarms based on the humidity level can be
configured using setpoints and offsets in the controller configuration screens.
Fans
The fans in the STULZ CyberWall units have optional Modbus-enabled monitoring abilities. Descriptions ofcontroller
software screens, alarms, etc. that pertain to Modbus fans are indicated with an asterisk ( * ) in the following pages.
These descriptions can be ignored for systems not equipped with Modbus fans.
Safety
Carefully read and understand all notes, cautions and warnings contained in this manual and on the unit that pertain
to the task to be performed.
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© STULZ USA – all rights reserved 05.11.23
E2PLUS SERIES CONTROLLER INSTALLATION, OPERATION & MAINTENANCE MANUAL

Notes, Cautions and Warnings
NOTE, CAUTION and WARNING statements are used in this manual to draw attention to important operational and
safety information.
A bold text NOTE marks an important detail.
A bold text CAUTION marks information important to protecting your equipment and its performance. Be especially
careful to read and follow all cautions that apply to your application.
A bold text WARNING marks safety information important to protecting you and others from harm.
Pay very close attention to all warnings that applyto your application.
An Exclamation — — symbol in a WARNING or CAUTION statement indicates a general safety alert.
A lightning bolt — — in a WARNING safety statement indicates an electrical shock hazard.
Safety Summary
The following warnings and cautions apply to the equipment and operations documented in this manual.
CAUTION
Before operating the unit, read and understand all instructions, recommendations and guidelines contained in
this manual.
CAUTION
All adjustments, maintenance and/or repairs must be performed by a qualified technician.
WARNING
Fans may start automatically. Before performing any maintenance actions on the unit ensure that all lockout/
tagout procedures have been followed and power is removed from the fans.
WARNING
If a fault occurs when operating the unit or adjusting control parameters, it must be corrected immediately in
accordance with the troubleshooting instructions for the unit.
CAUTION
Equipment may contain components subject to Electrostatic Discharge (ESD). Before attempting to mount or
servicethese electronic devices, ensureyou have no charge built up bytouching a ground source. When possible,
use a wrist-grounding strap when working on or near electronic devices.
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E2PLUS SERIES CONTROLLER INSTALLATION, OPERATION & MAINTENANCE MANUAL

DESCRIPTION
General
The advanced microprocessor-based STULZ E2pluS Series controller is a highly versatile and flexible A/C system
controller. The controller is equipped with software specifically configured at the factory for the CyberWall unit and
will require no field set-up other than configuring setpoints and their ranges. The program and operating parameters
are persistently stored in flash memory in case of power failure.
The controller is designed to manage temperature to a user defined setpoint via control output signals to the A/C
system. The controllerreceives inputsforthe measurable control conditions (temperature)via a supplyairT/H sensor.
Areturn airT/H sensor provides humidity data. Controllerinternal logic determineswhen conditions require cooling per
control setpoints establishedto maintain the room's design conditions.The controllerresponds to ambient temperature
changes and controls the output(s) to the air conditioning system to reach the control setpoints.
Features
Field Configurable
Setpoints for the controller are field configurable, allowing the operator to define them as required. The operator
interface for the controller is a graphic terminal containing a backlit LCD display and function keys. A menu driven
software interface provides the ability to scroll through and enter screens to view status and other data and enter
configuration values.
Password Protection
The password locks out the display. To view the displaythe password must be entered. The default password is 318.
It is recommended that the password be changed after initial setup.
Restorable Setpoint Parameters
Upon initial start-up the unit operates using the setpoints programmed by the factory. New operating parameters
may be entered in the Favorites folder screens and the system will operate accordingly.
The setpoints for the system may be re-adjusted in the Favorites folder or via the BMS at anytime.
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© STULZ USA – all rights reserved 05.11.23
E2PLUS SERIES CONTROLLER INSTALLATION, OPERATION & MAINTENANCE MANUAL

BMS Interface
The controller has a communication interface port that can be field-connected to a Building Management System
via BACnet. Refer to Figure 2 for BACnet IP and BACnet MS/TP port locations on the controller.
Graphic Terminal
The graphic terminal is mounted on the unit's electric box door. It features an easy to read, backlit liquid-crystal
alphanumeric display equipped with a jog dial and exit button for navigation. The screens that appear on the display
present data that originates from the controller.
Figure 1. Graphic Terminal
JOG DIAL
EXIT BUTTON
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E2PLUS SERIES CONTROLLER INSTALLATION, OPERATION & MAINTENANCE MANUAL

Function Keys
Key Function
• The points menu is used to display inputs, setpoints, values, outputs values, status, etc.
• The schedule and calendars menu is used to view and modifythe schedules and calendars.
• The alarms menu shows the active alarms.
Alarms can be acknowledged if the controller supports this functionality.
• The alarm icon will be blue when no alarms are active.
• The alarm icon will be red when an alarm is active.
• The manual overrides menu allows a user to remove an override, or change the override value
of any hardware input, hardware output, value, variable, and so on.
• The override icon will be purple when there are one or more active overrides in the controller.
• The override icon remains blue when override is not active.
• The favorites menu allows the user to view favorite screens that have been bookmarked.
• The PID loops menu allows the user to tune the controller’s PIDs
• The weather menu allows the user to view the current weather conditions if the BMS is con-
nected to the internet.
• The settings menu allows the user to view and configure the controller’s settings.
• The about menu can be customized to show a graphic (for example, a company logo) and
textual information (for example, contact information about the integrator). This menu also
allows the user to view the controller and operator interface software / bootloader versions.
Current
Selection
• When on the main screen, this shows the menu option currently selected by rotating the Jog Dial
• Toggles the ability to acknowledge alarms. Alarms can be acknowledged in the BACnet or at
the display. Icon shows locked/red if acknowledgement is not allowed, and unlocked/green
if acknowledgement is allowed.
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© STULZ USA – all rights reserved 05.11.23
E2PLUS SERIES CONTROLLER INSTALLATION, OPERATION & MAINTENANCE MANUAL

E2pluS Controller
The E2 pluS controller in mounted insidethe unit's electric box. Figure 2 showsthe E2 pluS controller and its interface
ports and LEDs.
Figure 2. Controller
The controller features called out in Figure 2 are:
1. RJ45 connector for controller display.
2. Power on LED.
3. Status LED.
4. BACnet IP Ethernet ports (qty. 2).
5. BACnet MS/TP port.
CAUTION
For units equipped with a UPS, when the power supply to the equipment has been shut off to service the unit,
be aware that the UPS module in the electric box still contains stored electric power up to 32 VDC. This
voltage will also be present in circuits that are electrically common to the UPS module.
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05.11.23 © STULZ USA – all rights reserved
E2PLUS SERIES CONTROLLER INSTALLATION, OPERATION & MAINTENANCE MANUAL