(Oct, 2011)
Notice
This document contains information protected by copyright. All rights are reserved. The owner of the equipment for which this manual is written may photocopy the contents of this manual for internal use only. No part of this document may be photocopied, reproduced, or translated into another language for use by anyone other than the owner of the equipment for which this manual is written without the prior written consent of Stulz Air Technology Systems, Inc. (SATS).
This document contains confi dential and proprietary information of Stulz Air Technology Systems, Inc. Distributing or photocopying this document for external distribution is in direct violation of United States copyright laws and is strictly prohibited without the express written consent of SATS.
Unpublished rights reserved under the copyright laws of the United States and of other countries.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.
© 2011 by Stulz Air Technology Systems, Inc. Printed in the United States of America. All rights reserved.
Stulz Air Technology Systems, Inc. 1572 Tilco Drive
Frederick, MD 21704 USA
QUICK START
INSTRUCTIONS
FOR INITIAL START-UP,
SEE SECTION 3.3.
(Oct, 2011)
1.0
GENERAL INFORMATION
1.1 Forward ...1-1 1.2 Safety Summary ...1-1 1.3 Warnings and Cautions ...1-1 1.4 Product Warranty ...1-2
2.0
DESCRIPTION
2.1 General ...2-1 2.2 Features ...2-1 2.2.1 Field Confi gurable ...2-1 2.2.2 Password Protection ...2-1 2.2.3 Restorable Set point Parameters ...2-1 2.2.4 BMS Interface ...2-1 2.3 User Interface Display Panel ...2-2 2.3.1 Contrast Adjustment ...2-2 2.3.2 Function Keys ...2-2 2.3.3 Alarms ...2-2 2.3.4 Remote Mounted Display ...2-2 2.4 Controller I/O Module ...2-3 2.4.1 Controller I/O Module Layout ...2-3 2.4.2 Expansion I/O Modules ...2-3
3.0 START-UP
3.1 Navigating Controller Screens ...3-1 3.2 Password Authorization Levels ...3-2 3.2.1 Password Protected Screens ...3-3 3.2.2 Wrong Password Screen ...3-3 3.2.3 Setting The Passwords ...3-3 3.3 Starting the System ...3-3 3.4 Set point Adjustment ...3-4 3.5 Saving and Restoring Parameters ...3-5 3.6 Alarms ...3-5 3.6.1 Summary Alarm ...3-5 3.7 Remote On/Off ...3-5
4.0
OPERATION
4.1 General ...4-1 4.2 Sequence of Operations ...4-1 4.2.1 Reactivation Control ...4-1 4.2.2 Reactivation Energy ...4-2 4.2.3 Control ...4-3 4.2.3.1 On/Off Control ...4-3 4.2.3.2 Proportional/Integral (P/I) Control ...4-3 4.2.3.3 P/I Loop Tuning ...4-3 4.2.4 Modes of Operation ...4-5 4.2.5 Humidity Control ...4-6 4.2.6 Energy Savings Mode ...4-6Table of Contents
i
4.2.7 Pre-cooling/Pre-heating Control ...4-7 4.2.8 Post-cooling/Post-heating Control ...4-7 4.2.9 Sensor Failure ...4-10 4.2.10 Static Pressure Control ...4-10 4.2.11 Unit Shutdown ...4-105.0 MENU
SCREENS
5.1 Main Menu ... 5-1 5.2 Remote Control Menu Loop ... 5-1 5.3 Information Menu Loop ... 5-2 5.4 Alarm Log ... 5-4 5.4.1 Alarms ... 5-4 5.4.2 Non-Critical Alarms ... 5-4 5.4.3 Critical Alarms ... 5-4 5.4.4 Alarm Screen Messages ... 5-4 5.5 Control Menu Loop ... 5-6 5.6 Service Menu Loop ... 5-10 5.7 Factory Menu Loop ... 5-13
6.0
COMMUNICATION WITH THE
CONTROLLER
6.1 Confi gure the Terminal Address ...6-1 6.2 BMS Communication ...6-3
7.0 MAINTENANCE
AND
REPAIRS
7.1 General ...7-1 7.2 Troubleshooting ...7-1
7.3 Control I/O Module Signal LED's ...7-2 7.4 Repair Procedures ...7-2 7.4.1 General ...7-2 7.4.2 Component Replacement ...7-2
8.0
PRODUCT SUPPORT
Table of Contents
(Continued)
LIST OF FIGURES
Figure 1 Network Interface Cards ...2-1 Figure 2 User Interface Display ...2-2 Figure 3 Controller I/O Module ...2-3 Figure 4 Main Menu Selections ...3-1 Figure 5 Electric Heater Staging- Reactivation ..4-2 Figure 6 P/I Loop Output Tuning ...4-4 Figure 7 Heater Staging- Pre/Post Heat ...4-8
LIST OF TABLES
Table 1 Factory Default Set points ...5-10
APPENDICES
(Oct, 2011)
1-1
1.0 GENERAL
INFORMATION
1.1 Forward
The microprocessor based, E2 Series controller covered
by this manual is designed and manufactured by Stulz Air Technology Systems, Inc. (SATS) utilizing the latest, state-of-the-art control technology. Recognized as a world leader, SATS provides dehumidifi cation systems and controllers manufactured with the highest quality craftsmanship using the fi nest materials available in the industry. The controller will provide years of trouble free service if it is operated and maintained in accordance with this manual. Damage to the unit from improper installation, operation or maintenance is not covered by the warranty.
This manual contains information for the operation, maintenance, troubleshooting and repair of the controller. STUDY the instructions contained in this manual. They must be followed to ensure proper operation. Spare parts are available from SATS to ensure continuous operation. Using substitute parts or bypassing electrical components in order to continue operation is not recommended and will VOID THE WARRANTY. Due to technological advancements, components are subject to change without notice.
E2 Series controllers are designed primarily to precisely
operate, control and monitor SATS dehumidifi cation and air conditioning systems. Any use beyond this is deemed to be not intended. SATS is not liable for any damage
resulting from improper use. All E2 Series controllers are
designed for indoor use.
1.2 Safety
Summary
Read and understand all instructions in this manual relating to the specifi c function you are to perform prior to starting the task.
Carefully read and understand all notes, cautions and warnings contained in this manual that pertain to the task you are to perform. Warnings indicate potential threat to personnel safety. Cautions indicate potential threat of damage to equipment.
Carefully read and understand all WARNING and/or CAUTION plates located on the unit.
1.3 Warnings & Cautions
SATS uses NOTES along with CAUTION and WARNING symbols throughout this manual to draw your attention to important operational and safety information.
A bold text NOTE marks a short message in the text to alert you to an important detail.
A bold text CAUTION safety alert appears with information that is important for protecting your equipment and performance. Be especially careful to read and follow all cautions that apply to your application. A bold text WARNING safety alert appears with
information that is important for protecting you from harm and the equipment from damage. Pay very close attention to all warnings that apply to your application.
A safety alert symbol accompanies a general
WARNING or CAUTION safety statement.
A safety alert symbol accompanies an electrical
shock hazard WARNING or CAUTION safety statement. The following statements are general guidelines followed by warnings and cautions applicable throughout the manual.
CAUTION
Prior to operating the unit, read and understand all instructions, recommendations and guidelines contained within this manual.
CAUTION
All adjustments, maintenance and/or repairs must be performed by a qualifi ed technician.
NOTE
We recommend contacting SATS Product Support for assistance with adjusting or servicing your unit.
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
2-Year Standard Limited Warranty:
Stulz Air Technology Systems, Inc., warrants to the original buyer of its products that the goods are free from defects in material and workmanship. Stulz Air Technology Systems, Inc.’s obligation under this warranty is to repair or replace, at its option, free of charge to the customer, any part or parts which are determined by Stulz Air Technology Systems Inc. to be defective for a period of 24 months from date of shipment when a completed start-up form has been submitted to Stulz Air Technology Systems, Inc. within 90 days from shipment. In the event that a completed start-up form is not received by Stulz Air Technology Systems, Inc. within 90 days from shipment, the company’s obligation will be for a period of 12 months from date of shipment. Parts repaired or replaced under this warranty are shipped FOB Factory, and warranted for the balance of the original warranty period or for 90 days from the date of installation, whichever is greater.
Stulz Air Technology Systems, Inc.’s warranty does not cover failures caused by improper installation, abuse, misuse, misapplication, improper or lack of maintenance, negligence, accident, normal deterioration (including wear and tear), or the use of improper parts or improper repair.
Purchaser’s remedies are limited to replacement or repair of non-conforming materials in ac-cordance with the written warranty. This warranty does not include costs for transportation, costs for removal or reinstallation of equipment or labor for repairs or replacement made in the fi eld.
If any sample was shown to the buyer, such sample was used merely to illustrate the general type and quality of the product, and not to represent that the equipment would necessarily conform to the sample.
This is the only warranty given by the seller, and such warranty is only given to buyers for commercial or industrial purposes. This warranty is not enforceable until the invoice(s) is paid in full.
THE FOREGOING SHALL CONSTITUTE SATS’S ENTIRE LIABILITY AND YOUR EXCLU-SIVE REMEDY. IN NO EVENT SHALL SATS BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES, INCLUDING LOST PROFITS (EVEN IF ADVISED OF THE POSSIBILITY THEREOF) ARISING IN ANY WAY OUT OF THE INSTALLATION, USE OR MAINTENANCE OF THE EQUIPMENT. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
This warranty supersedes all other previously printed warranties dated prior to this document
(Oct, 2011)
2.2.3 Restorable Set Point Parameters
Upon initial start-up the system operates using the set points programmed by the factory. The customer may enter new operating parameters in the Control>Setpoints and Control>Tuning menus and the system will then operate accordingly.
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 saved customer parameters or to the original factory (primary) parameters.
2.2.4 BMS Interface
The E2 series controller may incorporate an interface card with a communication port that can be fi eld connected through a serial interface to a Building Management System via Modbus, BACnet, SNMP or HTTP protocol as confi gured by the factory. A controller must be confi gured for BMS communication to interface with a network.
BACnet IP, BACnet Ethernet, HTTP, SNMP, & Modbus IP
BACnet MS/TP
Modbus RTU
Figure 1- Network Interface Cards
2-1
2.0 DESCRIPTION
2.1 General
The advanced microprocessor based, E2 Series controller is a highly versatile and fl exible system controller. It is designed primarily for SATS air conditioning systems. 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 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 controller is designed to manage temperature and humidity levels to a user defi ned set point via control
output signals to the system. The E2 Series controller
continually monitors conditions and maintains set points for the measurable control conditions via sensors (mounted in the cabinet or room mounted). 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 system so conditions reach the user defi ned control set points.
2.2 Features
2.2.1 Field Confi gurable
The program for the E2 Series controller is fi eld confi gurable, allowing the operator the capability of selecting control set points specifi c to the application. Operator interface for the E2 controller is provided via an attractive, 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 system. The menu driven interface provides users the ability to scroll through and enter various menu screens. Monitoring of room conditions and system operation is allowed without entering a password. Modifi cations to the control set points require the use of a password.
2.2.2 Password Protection
2.3
User Interface Display Panel
Figure 2- User Interface Display Panel The user interface display panel (Figure 2) features an easy to read, backlit liquid-crystal alphanumeric display equipped with LED illuminated function keys. The screens that are available on the interface display panel present data that originates from a controller I/O module. The controller is operated via a 6-key menu-driven loop structure and offers an alarm log plus monitoring and control interface menus to the operator. These menus permit the user to easily view, control and confi gure operating parameters for the unit. (See Menu Selections, Figure 4.)
2.3.1 Contrast Adjustment
Press and hold the ( ) and (Prg) keys; then repeatedly press the Up ( ) or Down ( ) keys to adjust the contrast.
2.3.3 Alarms
Alarm conditions activate a red LED indicator that backlights the Alarm ( ) function key. The red LED illuminates any time an alarm condition is present or previous alarms existed without having been reset or cleared. If alarm conditions occur, the fi rst active alarm screen may be displayed by pressing the Alarm key. This calls up alarm display screen(s) that provide a text message detailing the alarm condition(s). Only active alarm screens are displayed when the Alarm key is pressed. You may press the Down ( ) arrow key to scroll for additional alarm messages (if others exist).
Following the last active alarm message, a display screen message appears: “END OF ALARMS PRESS ENTER TO CLEAR”. After alarm condition(s) are corrected, the alarm(s) can be cleared from the display by pressing the Alarm key.
2.3.3.3 Alarm Log
The alarm log provides a history of the alarms in sequential order with a time and date stamp. To access the alarm log, press the Alarm key, then press the Up ( ) or Down ( ) arrow key until you reach the View Alarm Log
screen and press the Enter ( ) key to access the loop.
When access is gained to the Alarm Log, use of the Up and Down arrow keys allow you to scroll through the log for additional alarm messages.
2.3.4 Remote Mounted Display
As an option, the controller display panel may be shipped loose for remote mounting. The remote mounted display may be located directly on a wall or control panel using the mounting kit provided. Install the display panel in a secure area where it cannot be tampered with. An RJ11 telephone type cable harness is provided for interconnecting the display to the Controller I/O Module (Figure 3). Refer to the electrical drawing supplied with your unit for details on interconnecting fi eld wiring.
2.3.2 Function Keys
KEY FUNCTION
Accesses active alarm screen(s) Silences audible alarms Resets active alarms
Prg Accesses the main menu
Returns to the next menu level up
Cancels a changed entry
Steps back to the previous screen in the menu loop Increases the value of a modifi able numeric fi eld
"Enter Key"- Accesses a selected menu loop
Moves the cursor into a modifi able fi eld Accepts the current value of a modifi able fi eld
Steps to the next screen in the menu loop Decreases the value of a modifi able numeric fi eld
KEY FUNCTION
(Oct, 2011)
2-3
2.4 Controller I/O Module
The controller is equipped with a microprocessor based I/O module mounted inside the electric box (see Figure 3). The controller I/O module contains the software that manages the operating parameters of the system.
2.4.1 Controller I/O Module Layout
The controller I/O module contains the logic and input/ output terminals. See Figure 3 for a detailed layout of the I/O module. The item numbers below coincide with the call-outs in Figure 3.
1. RJ11 telephone connector (J10) for display panel 2. Connection for pLAN (J11)
3. Knockout for BMS network interface card 4. Power On LED (Yellow)
5. Signal LEDs (Red, Yellow, Green) 6. Knockout for expansion I/O module(s) 7. Power connector (J1)
Figure 3- Controller I/O Module
3 1 2 4 5 6 7
2.4.2 Expansion I/O Modules
3.0 START-UP
3.1 Navigating Controller Screens
3.1.1 Menu Selection
The E² Series controller provides user selectable menus needed to view operating data and enter set points for the system (see Figure 4). These menus may be accessed by pressing the Program (Prg) key. You are then allowed to scroll between adjacent menu selections using the Up ( ) and Down ( ) arrow keys. When the desired menu is centered in the screen with bold capital
letters and an arrow symbol pointing toward the Enter
( ) key, you may press the Enter key to access that
menu loop. The user can move between the menu loop screens using the Up ( ) and Down ( ) arrow keys. Depending on the unit confi guration, the controller only displays screens that are applicable to that confi guration. Access to some menu loops may be protected by the built in security protocol and require using a password to gain access.
3.1.2 Menus
Press the Program (Prg) key to view the main menu screens shown in Figure 4.
290.0°F 135.0°F
000.0 %RH
Figure 4- Main Menu Selections
Main Info Screen
*Call SATS Product Support for Assistance
MAIN MENU Control SERVICE Factory MAIN MENU Alarm Log CONTROL Service MAIN MENU Info ALARM LOG Control MAIN MENU Rem Ctrl INFO Alarm Log MAIN MENU Service FACTORY Rem Ctrl Press ( ) or ( ) Key Press ( ) or ( ) Key Press ( ) or ( ) Key Press ( ) or ( ) Key
MENU SCREENS LOOP DISPLAYS
REMOTE CONTROL
Allows the unit to be started/ stopped from E² display panel. INFO MENU Basic status information, no
password needed.
ALARM LOG Logged Alarms in chronological sequence.
CONTROL MENU Basic user values i.e. set points. Level 1 password required. SERVICE MENU Advanced user values i.e. offsets.
Level 2 password required. FACTORY MENU
(*Access is limited)
Factory values i.e. sensor scaling. *Level 3 password required. From the Main Menu
Screens Press Enter ( ) Key To Access Menu Loops
(Oct, 2011)
3-2
3.1.3 Display Variables
The user interface display panel provides display screens with three (3) different forms of both the read only and the modifi able variables:
Numbers are displayed as positive (+) or negative (-) integers.
Dual-State can be toggled between two (2) values i.e. On/Off, Yes/No.
Word Variables have a unique text message for each of the variable's possible choices.
3.1.4 Cursor Position in Screens
The following display screen is shown as an example after accessing a new menu loop display screen using the function keys. The name of the menu loop is the line in the upper-most fi eld of the screen. A fl ashing window also appears in the left of the uppermost fi eld indicating you're in the top level of that menu screen.
CONTROL MENU Alarm Set
CLOCK
Version Flashing WindowFrom this position the Up ( ) and Down ( ) arrow keys may be used to access additional selections within the main menu.
Each screen supports a specifi c functional requirement.
Pressing the Enter ( ) key allows you access to the
selected menu loop to adjust any of the modifi able fi elds. If a screen with modifi able values is accessed, you may use the Enter key to insert a fl ashing cursor in the modifi able fi elds within that screen.
Flashing Cursor SET CLOCK Time: 00:00 Date: 00/00/0000 Day: XXXXXXX
If the fl ashing cursor is located in a modifi able fi eld, the value of the fi eld may be changed using the Up (
) and Down ( ) arrow keys. When the Enter ( ) key is
pressed, the cursor moves to the next modifi able fi eld. After entering the last modifi able fi eld within a screen, pressing the Enter key removes the cursor and the fl ashing window reappears in the left-hand corner of the upper-most fi eld of the current screen. From here, advancement to the next menu loop screen occurs when the Up or Down key is pressed. Successive use of
the Enter key advances the cursor through the various modifi able fi elds of the display screen eventually returning to the fi rst fi eld.
Values that are already correct may simply be skipped
over by using the Enter ( ) key without modifi cation of
the variable. The current value, if not changed, will be retained after pressing the Enter key. Values cannot be adjusted outside of their designated limits; the values automatically wrap back around when you scroll past the end limit or beginning limit.
Whenever the fl ashing cursor is located in a modifi able fi eld, pressing the Escape (Esc) key one time returns the user to the next menu level up. Each successive use of the Escape key returns you to the next menu level up until the Main Info screen is reached.
3.1.5 Modifi able Variables SET CLOCK Time: 00:00 Date: 00/00/0000 Day: XXXXXXX Modifi able Variable
For the purpose of this manual, the examples of user modifi able variables within display screens are denoted by bold text. Please note the actual display may not use
bold text. Pressing the Enter ( ) key accepts the value
displayed and advances the cursor to the next modifi able fi eld. The Up ( ) or Down ( ) key may be used to modify the values of these fi elds.
If the modifi able fi eld is a positive (+) number, the positive value is indicated by the absence of a (+) or (-) symbol. The (-) negative symbol is displayed to the left of the fi rst digit for negative numbers.
3.2 Password
Authorization
Levels
Access to a menu loop may be requested from the main menu. Modifi able control screens have variables that affect system performance. Improper settings may result in erratic operation and possible system failure or damage. Anyone is allowed direct access to the Info menu and Alarm Log menu loops with no security password.
3.2.1 Password Protected Screens
Upon fi rst attempting to select a secure menu in a given session, the Password screen is displayed. This screen displays the current security level authorized.
Enter Password: 0
Level:0 (Current Security
Level)
PASSWORD
Enter Password Screen
A session is active or timed from the point access is gained to a secure menu until 5 minutes elapses with no key activity. Security access is terminated at this point and the password will have to be re-entered to gain access.
The controller is shipped from the factory with preset
passwords for all the security levels.The level of
authority is established by entering the proper password for a given security level. It is intended that access to the secured menu screens only be granted while the user is working with the guidance of SATS Product Support (see Section 8.0) because incorrect settings made at that level could unintentionally damage the equipment.
Operators who are allowed access to the Service menu (level 2) for example, must know the password to enter that level. If the entered password equals or exceeds the level requested during a given session, the operator is allowed to access the requested loop. For example, if the entered password allows access to level 2 and the Control menu (level 1) is requested, access will be allowed. If the entered password authority level is lower than the level requested, the words "WRONG PASSWORD" appear for several seconds at the bottom of the screen.
3.2.2 Wrong Password
Enter Password: 0
Level:0
** WRONG PASSWORD **
PASSWORD
The “WRONG PASSWORD” message is displayed any time an incorrect password has been entered and the Enter
( ) key has been pressed. If the “Wrong Password”
message appears, using the Enter ( ) key returns the
operator to the “Enter Password” fi eld.
A requested menu loop is displayed any time a valid
password has been entered and the Enter ( ) key has
been pressed.
NOTE
If you request the Control menu loop and enter the Service menu password, you are granted access to both.
3.2.3 Setting the Passwords
The initial passwords are set by the factory. Upon entering the Service>Passwords menu, the operator is allowed to change the passwords (see Section 5.6.4). If changed, from that point on access may only be gained to that menu by personnel who know the password.
3.3
Starting the System
CAUTION
Ensure all hookups to the system are completed and that power is available.
1. Turn the unit main power disconnect switch to "On" and turn the mode selector switch (S15) to "Local". Upon applying control power, the display function keys illuminate and the controller begins conducting internal diagnostics to confi rm functionality. The controller polls the sensor inputs and alarm logic to determine if it's safe to start the system.
2. After about 25 seconds the "Desicair Desiccant Dehumidifi er" start up screen is displayed. The start-up screen appears for approximately 10 seconds and is then replaced by the Main Info screen which provides a graphic overview of the current system operating conditions.
290.0°F 135.0°F
000.0
%RH
Main Info Screen
3. A status message appears in the bottom of the display screen and the controller sends output signals for the unit to begin operating.
Status messages that may appear at the bottom of the screen are:
= Mode selector switch is in the Local
position.
(Flashing) = Mode selector switch is in the
Remote position; unit is waiting for remote Start input signal.
(Solid) = Mode selector switch is in the
(Oct, 2011)
3-4
(Flashing) = Rotor purge mode.
= Humidistat is closed.
= Unit is Off.
4. When adequate air fl ow is detected, the controller automatically enables control outputs as defi ned by the system confi guration. Operation of the dehumidifi er’s reactivation circuit is enabled only when there is process and reactivation air fl ow. A process air proving switch closes when the unit is turned on and the air proving switch detects suffi cient air fl ow. With the process air fl ow switch closed, the reactivation blower is enabled.
A reactivation air proving switch is also provided. The switch closes when there is suffi cient reactivation air fl ow, enabling the reactivation heater.
5. If actual room conditions are not within the range of the programmed set points, the system begins operating in the mode(s) needed to reach the set points. Animated icons (shown below) appear in the display to indicate the components are operating.
= Process Blower = Reactivation Blower
= Reactivation Heater- Electric
= Reactivation Heater- Gas
= Reactivation Heater- Steam
= Number of Active Heater Stages
= Desiccant Rotor
= Energy Savings On= Alarm Indicator
= Fire/Smoke Condition Detected= Unit is in Emergency Stop Mode
6. Operator interface to the display menu screens is available from the Main screen by pressing the Program (Prg) key. The controller starts a timer whenever a key sequence is initiated. Every time a button is pressed, the timer is reset. If there is no key activity for 5 minutes, the controller returns to the Main Info screen.
7. If it is intended to operate the unit via a remote start contact, turn the mode selector switch to "Remote". The unit will start when the remote start contact closes.
3.4 Set
Point
Adjustment
1. From the Main Info screen, you may access the menu loops by pressing the Program (Prg) key. 2. Scroll through the main menu selections with the Up ( ) and Down ( ) arrow keys and select the
Control>Setpoints menu by pressing the Enter ( ) key
when the word "CONTROL " appears in bold letters in the
center of the screen. Press the Enter ( ) key again when
the word "SETPOINTS " appears in the center of the screen.
3. The password entry screen appears. To access the
Setpoints menu, press the Enter ( ) key to insert a
fl ashing cursor in the "Enter Password" fi eld.
Enter Password: 0
Level:0 (Flashing
Cursor)
Change the "0" to "1" (or to the current Setpoints menu password if it was changed in the Service>Passwords menu) with the Up ( ) arrow key and then press the Enter
( ) key to accept the password. Press the Enter ( )
key again to access the Setpoints menu screens. 4. From the Setpoints menu, select the set point you wish to adjust by scrolling through the menu selections with the Up ( ) and Down ( ) arrow keys and pressing
the Enter ( ) key when the parameter you wish to adjust
appears in the screen.
SETPOINTS REACTIVATION DISCHARGE SETPOINT
135.0°F
(Flashing Cursor)Pressing the Enter ( ) key places the fl ashing cursor in
the set point value fi eld. Increase or decrease the value with the Up ( ) and Down ( ) arrow keys until the desired
value is shown. Press the Enter ( ) key again to accept
the value (this removes the cursor from the fi eld). Press the Escape (Esc) key to return to the menu screens. 5. Observe the icons in the Main Info screen to
3.5 Saving and Restoring Parameters
Upon initial start-up, the system operates using the set points programmed by the factory (Factory Parameters). As described in Section 3.4, the customer may enter new operating set points in the Control>Setpoint menu anytime and the system will operate accordingly. The user may store the new set points in the Service>Save Cfg menu if it is intended to save them. Once stored, the set points now become the restorable Customer Parameters. The set points entered by the factory still remain stored in the controllers' memory as the Factory Parameters.
At any time, set points for the system may be re-adjusted to any value and the system will operate accordingly. If it becomes necessary however, the customer may enter the Service>Save Cfg menu and restore the set points to the stored Customer Parameters values. The original Factory Parameters set point values may also be restored from the Save Cfg menu. Whichever set points are restored (Factory or Customer), they become the operating set points.
3.6 Alarms
An alarm condition illuminates the alarm key and energizes an audible alarm. Selected alarm conditions may be programmed into the system controller as summary alarms (see below). Some alarms are programmed to automatically shut down the unit until the alarm condition is remedied and the alarm is cleared by pressing the Alarm ( ) key. Alarms that may be enabled by the factory are listed in Section 5.4.4.
3.6.1 Summary Alarm
A summary alarm activates when the controller senses a programmed summary alarm condition. This illuminates the alarm key and the summary alarm light on the control panel. If the option is selected, a N.O./N.C. summary alarm contact may be energized for remote monitoring of alarm conditions. If certain critical summary alarm conditions are detected, they cause the unit to shutdown.
3.7 Remote On/Off
Terminal positions are provided to connect a remotely located, On/Off switching control device for Remote On/ Off operation. If the unit is running and the E² controller receives a remote digital input signal to turn the unit off, the controller disables all control outputs and a message "Off by Remote Shutdown" appears in the display screen. The system is automatically re-enabled when the remote On/Off signal calls for the unit to turn back on.
(Oct, 2011)
4.0 OPERATION
4.1 General
The E² Series controller is used to control a dehumidifi cation system in a space or process application to maintain temperature and/or humidity levels as defi ned by the user.
The controller is factory confi gured and manages inputs and outputs based on the specifi c application. Sensor(s) may be located in the process air inlet to monitor return air conditions and/or located in the process air outlet to monitor the discharge air or, installed in the conditioned space to monitor room air conditions. The controller utilizes the sensor inputs to determine the demand for dehumidifi cation based on the control set points. The controller determines the appropriate response (output signals) to the sensor input signals to operate the dehumidifi er.
4.1.1 On/Off Control
Based on control input signals, the controller provides digital (On/Off) output control signals to activate certain modes of operation for the dehumidifi er (i.e. staged heaters, motors) or display an operating status (i.e. blower operation, mode selector switch position or alarm condition).
4.1.2 Proportional/Integral (PI) Control
The controller compares sensor input signals to control set points and develops proportional control outputs for variable operations (i.e. SCR heater, blower VFD, valves). An integral factor is used to gradually adjust proportional outputs when the calculated output does not move the process variable closer to the control set point in a given period of time. Decreasing the integral value decreases the interval for output corrections (speeding the rate of adjustment). Increasing the integral value increases the interval for corrections (slowing the rate of adjustment).
4.2 Sequence of Operations
4.2.1 Reactivation Control
Operation depends on the controller's programmed operating modes and the selected control method. Four different reactivation control methods are available as standard and are set in the Factory>Confi guration menu (see the dehumidifi er IOM for more detailed descriptions of the reactivation control methods).
1. H-Trac- The dehumidifi er maintains space/discharge relative humidity (RH) based upon a relative humidity
transmitter located in either the dehumidifi er outlet or the controlled space.
2. Dew-Trac- The dehumidifi er maintains space/discharge dew point (DP) based upon a dew point transmitter
located in either the dehumidifi er outlet or the controlled space.
3. C-Trol 2- The dehumidifi er maintains space dew point (DP) to a predetermined set point that is below the temperature of a cold surface/pipe. This control method is designed to prevent condensation from forming on cold surfaces.
4. D-Stat- The dehumidifi er cycles on and off based on a space humidistat input. The process blower can be
programmed to cycle On & Off with the humidistat, or remain running to circulate air within the space. See Section 4.2.4.1.
Note: Each control method requires a unique sensor confi guration. If fi eld modifi cations are necessary, they must be coordinated with the factory.
4.2.2 Reactivation Energy
4.2.2.1 Electric
The energy required to reactivate the desiccant rotor is generated by electric resistance heaters and is modulated by using an SCR (Silicon Controlled Rectifi er) and contactors. Digital heater stages are cycled on and off based on heater demand. The reactivation energy is proportionally controlled based upon the control method selected. Reactivation heater staging- 1 to 5 stages can be selected for reactivation heater control. Stage 1 is proportionally controlled via an SCR. Stages 2 through 5 are digital stages, contactor-controlled based on the reactivation heater loop output (see Section 4.2.3). As the loop output increases, the number of stages enabled increases as shown Figure 5. CUT IN and CUT OUT points are set in the Control>Tuning menu and should not require modifi cation. The CUT IN point indicates the point, based on the heater loop output, at which the stage is enabled. The CUT OUT point indicates the point, based on the heater loop output, at which the stage is disabled. See Figure 5 for a graphical representation of the control logic.
Figure 5- Electric Heater Staging- Reactivation
In this example, the following CUT IN’s and CUT OUT’s are used for the digital staging: CUT IN CUT OUT
Stage 2 20% 15%
Stage 3 40% 35%
Stage 4 60% 55%
Stage 5 80% 75%
(Oct, 2011)
4-3
4.2.2.2 Direct GasThe energy required to reactivate the desiccant rotor is generated by a direct-fi red gas burner and is modulated using a proportional gas valve. The reactivation energy is proportionally controlled based upon the control method selected. 4.2.2.3 Steam
The energy required to reactivate the desiccant rotor is generated by steam coils and is controlled by varying
reactivation air fl ow. Reactivation air fl ow is modulated using a Variable Frequency Drive (VFD) to control reactivation blower speed. Reactivation energy is proportionally controlled based upon the control method selected. A reactivation air inlet damper opens when the reactivation blower is energized and closes when the reactivation blower is de-energized.
4.2.3 Control
4.2.3.1 On-Off Control
Many of the dehumidifi er functions require the use of On-Off control. For functions utilizing this method of control, parameters may need to be adjusted to provide smooth and stable operation. Each control function has a screen indicating CUT IN and CUT OUT points which can be modifi ed. These screens are found in the Control>Tuning menu. The CUT IN value defi nes the point at which a control function is enabled. The CUT OUT value defi nes the point at which a control function is disabled.
NOTE: Display screens in the tuning menu do not time out and will display indefi nitely.
4.2.3.2 Proportional/Integral (P/I) Control
Many of the dehumidifi er functions require the use of Proportional/Integral control. A P/I control loop compares the measured value from an appropriate sensor (referred to as the process variable) to the setpoint and calculates an output based on the difference (error) between the setpoint and the process variable and the location within the proportional band.
If the controlled process variable (i.e. temperature or humidity) deviates from the setpoint, the E² controller generates an analog output signal to begin proportional control of the device that affects the variable, such as a control valve, blower VFD or heater SCR. The controller transmits an analog output signal based upon the percentage output required (0 –100%) to move the process variable toward the setpoint. The minimum percentage output of 0% corresponds to a 0V output signal. The maximum percentage output 100% corresponds to a 10V output signal.
4.2.3.3 P/I Loop Tuning
If required, the PI parameters can be adjusted to better tune the process being controlled. These parameters are accessible through Control>Tuning menu. Level 1 password authorization is required to enter this loop. Ordinarily the control parameters do not require adjustment but if the proportional output cannot reach stability (i.e. control valve hunting) or changes in the process occur faster than the controller can react, the PI control parameters may require adjustment.
Increasing the proportional band (PB) can decrease overshoot on startup and dampen the response to changes in the parameter being controlled. Decreasing the proportional band can increase the response to system changes but may increase overshoot and decrease stability (see Figure 6).
NOTE: The proportional band must be greater than the natural oscillation in the system, as measured by the sensor (process variable), or the control will never reach stability.
A screen is provided for each control loop indicating the P/I control parameters, many of which can be modifi ed. Changes to the PI parameters are made from the Control>Tuning loop, selecting the screen that coincides with the parameter to be adjusted. Example: TUNING MENU POSTCOOL SP: 68.0°F PB: 40.0°F ERR DB: 0.6°F IT: 100 ACTION:FORWARD OFFSET: 0.1°F WSP: 68.1°F LOOP OUTPUT: 0.0% PRECOOL TEMP: 88.3°F
(Modifi able parameters are denoted with bold text.)
4.2.3.4.1 Proportional Control Parameters
Display Parameter Explanation
SP Set point This is the Set point for the control loop. This value can be changed on this screen
as well as in the SETPOINTS menu loop.
PB Proportional Band
This value defi nes the range (in degrees or percent) above and below the set point in which the output acts proportionally. Within the proportional band, the value of the output is proportional to the “distance” (error) from the set point value. Increasing the Proportional Band value decreases (slows) the loop response.
ERR DB Error Deadband
This value defi nes the range (in degrees or percent, ½ range above and ½ range below the set point) in which the loop output has NO change in action. The output remains constant when the process variable (PV) moves into the error dead band range. The output does not change again until the PV moves outside of the error dead band range.
IT Integral Time This value defi nes the calculation rate of the proportional loop. The range is from
1 to 9999. 1 is the fastest calculation rate for the loop, 9999 is the slowest.
ACTION Action
This variable determines the response of the loop output in relation to the process variable compared to the set point. REVERSE is used for Heating or Dehumidifi -cation loops. FORWARD is used for Cooling and Humidifi -cation loops.
OFFSET Set point Offset
Value added to or subtracted from the set point when two loops have a common set point. Offset values are always positive and are subtracted from the heating set point and added to the cooling set point. The amount of offset required varies depending on the system.
WSP Working Set point This is the actual set point minus the offset (SP - OFFSET). The WSP is the set point that the loop is actually controlling to. LOOP OUTPUT Loop Output
This is the output value (%) of the loop within the controller. In certain control methods, this value may or may not correspond to the actual output to the control device. Uns table Des ired Set Point Error Deadband Proportional Band Time 100% 0% Output (Response)
Figure 6- Loop Output Tuning- Reactivation Heater Loop Example
(Oct, 2011)
the adjustment on system performance to determine if it is producing the desired result. Observe the frequency of oscillations and time required to regain stability.
If required, decrease the integral value to decrease the interval for output corrections (speeding the rate of adjustment) or increase the integral value to increase the interval for corrections (slowing the rate of adjustment).
CAUTION
Always allow adequate time for the system behavior to stabilize before making additional adjustments. Wait at least 10 to 15 minutes for the system to stabilize if controlling discharge air conditions, however, if space conditions are being controlled, it may take several hours for the system to stabilize.
4.2.4 Modes of Operation
A. Mode selector switch (S15) in OFF position:
1. Power On light (DS1) energizes and the press-to-test feature (if installed) is enabled on indicating lights (DS2), and (DS3).
2. Control transformers energize. 3. The E2 controller (PLC1) energizes. 4. E2 remote display energizes.
B. Mode selector switch (S15) in REMOTE position 1. REMOTE indicator on the display fl ashes.
2. Once the Remote Start/Stop contact closes, the unit operates as described in Sections 4.2.4, C through 4.2.11.
C. Mode selector switch (S15) in LOCAL position 1. The Process blower motor (B3) is energized.
2. The Reactivation blower motor (B2) and Desiccant drive motor (B1) are energized.
3. Once any applicable Air Proving switches close (Gas-Burner Air Proving/Electric-Reactivation Air Proving/ Steam-N/A) the reactivation heater(s) energize and modulate as required.
4. If applicable, process air cooling/heating functions are enabled once the process air proving switch closes.
5. The dehumidifi er operates as described in Sections 4.2.4.1 through 4.2.11.
4.2.4.1 D-Stat Specifi c Operation (On/Off Humidity Control)
In addition to the remote start/stop contact, an optional humidistat or customer supplied humidity control device may be installed. The humidistat contact must close for the unit to operate. See Section 4.2.1; number 4.
4.2.4.1.1 Process Blower Continuous Run
This parameter may be programmed in the Factory>Confi guration menu if a process blower is provided by SATS. If this parameter is set to YES, the process blower runs whenever the unit selector switch is in LOCAL or in REMOTE with the Remote Start Stop contact closed. If this parameter is set to NO, the process blower runs whenever reactivation is enabled.
NOTE: The process blower runs continuously with H-Trac, DewTrac and C-Trol control methods. 4.2.4.2 Keypad Control
The dehumidifi er can be turned on and off from the display keypad using the Rem Ctrl menu loop (see Section 5.2). By default, this feature is turned off however, it may be enabled in the Factory>Confi guration menu.
NOTE: The mode selector switch (located on the main control box) must be in the REMOTE position for this function to work.
CAUTION
Setting the Rem Ctrl menu parameter to ON overrides the remote start/stop contact.
4.2.5 Humidity Control
The dehumidifi er attempts to maintain the space/return/discharge relative humidity or dew point to the prescribed set point. Humidity is measured by sensor TN11 which is the process variable for the humidity control loop.
A. Drying capacity is controlled by modulating reactivation of the Desiccant Rotor. If the ENERGY SAVINGS MODE is enabled in the Control>Tuning menu (see Section 5.5.2), the Reactivation Blower Motor (B2) and Desiccant Drive Motor (B1) are only energized when there is demand for dehumidifi cation. If the ENERGY SAVINGS MODE is disabled, the Reactivation Blower Motor (B2) and Desiccant Drive Motor (B1) are energized whenever the dehumidifi er is running. When reactivation is enabled, the Reactivation Heater (HR25) modulates to maintain relative humidity or dew point.
Three independent calculations take place simultaneously within the E2 Controller to modulate reactivation energy: 1. A reactivation heater temperature PI control attempts to maintain a fi xed heater temperature. Heater temperature is measured by an RTD (SE22-1). The factory default reactivation heater temperature set point is 290°F.
2. A reactivation discharge temperature PI control attempts to maintain a fi xed reactivation discharge air temperature. Reactivation discharge temperature is measured by an RTD (SE22-2). The factory default reactivation discharge temperature set point is 135°F.
3. A humidity PI control attempts to maintain the dew point (DP) or relative humidity (RH) set point.
Humidity is measured by a transmitter located in the controlled space/discharge. The set point for this loop can be adjusted in the Control>Setpoints or Control>Tuning menu.
4. The lowest value of these three PI outputs is used to control the reactivation heater.
B. If the unit is confi gured for C-Trol II control, the dew point (DP) set point is based on a differential from the cold surface temperature (SP = cold surface temp - differential). Example: If the pipe temperature, as measured by the cold surface sensor, is 45°F and the DP differential is set to 5°F, the dehumidifi er attempts to maintain space dew point at 40°F. The differential is set at the factory to 5°F DP and is adjustable in the Control>Setpoints menu. C. If the unit is confi gured for D-Stat control, the dehumidifi er operates as follows:
1. A reactivation heater temperature PI control attempts to maintain a fi xed heater temperature. Heater temperature is measured by an RTD (SE22-1). (See note 1)
2. A reactivation discharge temperature PI control attempts to maintain a fi xed reactivation discharge air temperature. Reactivation discharge temperature is measured by an RTD (SE22-2).
3. The lowest value of these two PI outputs is used to control the reactivation heater.
Note 1: If steam reactivation is selected, reactivation heater temperature may or may not be displayed or used as a control point. This is selected in the Factory>Confi guration menu.
4.2.6 Energy Savings Mode
(Oct, 2011)
4.2.7 Pre-cooling/Pre-heating Control (Optional) 4.2.7.1 Pre-cooling (Chilled Water/Glycol)
A. Process pre-cooling is enabled once the process air proving switch closes indicating proper air fl ow across the process portion of the rotor. If a Process Air Proving Fault occurs, all heating and cooling functions are disabled until the fault is cleared.
B. Process pre-cooling is optional and is enabled in the Factory>Confi guration menu. If the dehumidifi er is ordered with this option, it will be confi gured at the factory. Single stage PI control is offered as a standard.
C. If the pre-cool option is enabled, a pre-cool set point screen is displayed in the Control>Setpoints menu, a tuning screen is displayed in the Control>Tuning menu, and a monitoring screen is displayed in the Info menu loop. D. A pre-cool sensor is required for this option and is mounted after the pre-cool coil. The sensor signal is used as the process variable for the pre-cool control loop. Pre-cool coil discharge air temperature control is utilized. The set point for the pre-cool loop indicates desired discharge air temperature of the pre-cool coil. A 0-10VDC control output is provided and indicated on the electrical drawing. If a chilled water control valve is provided by SATS, the 0-10VDC output is used to control this valve.
E. Sensor(s) are confi gured in the Factory>Sensors menu. Sensors/inputs are confi gured and tested (where applicable) at the factory. Modifi cations to these parameters should not be required.
4.2.7.2 Pre-heating
A. Process pre-heating is enabled once the process air proving switch closes, indicating proper air fl ow across the process portion of the rotor. If a Process Air Proving Fault occurs, all heating and cooling functions are disabled until the fault is cleared.
B. Process pre-heating is optional and is enabled in the Factory>Confi guration menu. If the dehumidifi er is ordered with this option, it will be confi gured at the factory. One or two stage PI control is offered as a standard.
C. If the pre-heat option is enabled, a pre-heat set point screen is displayed in the Setpoints menu, a tuning screen is displayed in the Control>Tuning menu, and a monitoring screen is displayed in the Info menu loop.
D. A pre-heat sensor is required for this option and is mounted after the pre-heat coil. The sensor signal is used as the process variable for the pre-heat control loop. Pre-heat coil discharge air temperature control is utilized. The set point for the pre-heat loop indicates desired air discharge temperature of the pre-heat coil. A 0-10VDC control output is provided and indicated on the electrical drawing. If a gas or steam control valve is provided by SATS, the 0-10VDC output is used to control this valve.
E. Sensor(s) are confi gured in the Factory>Sensors menu. Sensors/inputs are confi gured and tested (where applicable) at the factory. Modifi cations to these parameters should not be required.
4.2.8 Post-cooling/Post-heating Control (Optional) 4.2.8.1 Post-cooling (Chilled Water/Glycol)
A. Process post-cooling is enabled once the process air proving switch closes, indicating proper air fl ow across the process portion of the rotor. If a Process Air Proving Fault occurs, all heating and cooling functions are disabled until the fault is cleared.
B. Process post-cooling is optional and is enabled in the Factory>Confi guration menu. If the dehumidifi er is ordered with this option, it will be confi gured at the factory. Single stage control is offered as a standard. Cascade or single loop control is also included as a standard. Both options are selectable in the Factory>Confi guration menu. C. If the post-cool option is enabled, a space/discharge air temperature set point screen is displayed in the
Control>Setpoints menu, a post-cool tuning screen is displayed in the Control>Tuning menu, and a monitoring screen is displayed in the Info menu loop.
D. Single loop control.
1. A space/discharge air temperature sensor is required for this option and is mounted in the dehumidifi er process air discharge duct or the controlled space. This sensor signal is used as the process variable for the post-cool control loop. The discharge/space temperature set point indicates the desired discharge/space temperature.
E. Cascade control (or temperature reset control).
1. A space temperature sensor mounted in the controlled space is required for this option. A post-cool/ process discharge air temperature sensor is also required to be mounted after the post-cool coil or in the process discharge duct. The following screens are available in the Control>Tuning menu:
TUNING MENU POSTCOOL SP: 65.0°F PB: 20.0°F ERR DB: 1.0°F IT: 0100 ACTION:FORWARD OFFSET: 0.0°F WSP: 65.0°F LOOP OUTPUT: 00.0% POSTCOOL TEMP: 88.3°F TUNING MENU POSTCOOL (CASCADE) ERR DB:1.0°F PB:20.0°F ACT:REVERSE IT: 0100 SP LO:65.0°F SP HI:95.0°F WSP: 65.0°F LOOP OUTPUT: 00.0% POSTCOOL TEMP: 88.3°F
This control method uses one control loop to determine the set point for another control loop. In this example, the output from the post-cool loop determines the set point of the post-cool cascade loop. The output (0-100%) from the post-cool loop determines a set point range (65 °F to 95 °F in this example) of the cascade loop. The cascade loop attempts to maintain the post-cool discharge air temperature to this set point. The output from the cascade loop determines the 0-10VDC output to the control valve. In this example, this control method allows for an upper and lower limit to the air temperature leaving the dehumidifi er.
F. A 0-10VDC control output is provided and is indicated on the electrical drawing. If a chilled water control valve is provided by SATS, the 0-10VDC output is used to control this valve.
4.2.8.2 Post-heating (Hot Water / Steam / Electric Heater)
A. Process post-heating is enabled once the process air proving switch closes, indicating proper air fl ow across the process portion of the rotor. If a Process Air Proving Fault occurs, all heating and cooling functions are disabled until the fault is cleared.
B. Process post-heating is optional and is enabled in the Factory>Confi guration menu. If the dehumidifi er is ordered with this option it will be confi gured at the factory. 1 or 2 stage PI control is utilized. Cascade or single loop control is also included as a standard. Both options are selectable in the Factory>Confi guration menu.
C. If the post-heat option is enabled, a space/discharge air temperature set point screen is displayed in the
Control>Setpoints menu, a post-heat tuning screen is displayed in the Control>Tuning menu, and a monitoring screen is displayed in the Info menu loop.
D. Single loop control.
1. A space/discharge air temperature sensor is required for this option and is mounted in the dehumidifi er process air discharge duct or the controlled space. The sensor signal is used as the process variable for the pre-heat control loop. The discharge/space temperature set point indicates the desired discharge/space temperature.
E. Cascade control (or temperature reset control).
1. A space temperature sensor mounted in the controlled space is required for this option. A post-heat/process discharge air temperature sensor is also required to be mounted after the post-heat coil/electric heater or in the process discharge duct. With cascade control, the following screens appear in the Control>Tuning menu:
TUNING MENU POSTHEAT SP: 65.0°F PB: 20.0°F ERR DB: 1.0°F IT: 0100 ACTION:FORWARD OFFSET: 0.1°F WSP: 65.0°F LOOP OUTPUT: 00.0% POSTCOOL TEMP: 88.3°F TUNING MENU POSTHEAT (CASCADE) ERR DB:1.0°F PB:20.0°F ACT:REVERSE IT: 0100 SP LO:65.0°F SP HI:95.0°F WSP: 65.0°F LOOP OUTPUT: 00.0% POSTCOOL TEMP: 88.3°F
(Oct, 2011)
loop. The cascade loop attempts to maintain the post-heat discharge temperature to this set point. The output from the cascade loop determines the 0-10VDC output to the SCR or control valve. This control method allows for an upper and lower limit to the air temperature leaving the dehumidifi er.
F. A 0-10VDC control output is provided and indicated on the electrical drawing. If a gas or steam control valve is provided by SATS, the 0-10VDC output is used to control this valve.
4.2.8.2.1 Two Stage Pre/Post-heat Control (Electric Heater)
A. One or two stages can be selected for pre/post-heater control. Stage 1 is always proportionally controlled with an SCR. Stage 2 is digital (staged contactor) controlled based on the pre/post-heater loop output. As the loop output increases, the number of stages enabled increases. CUT IN and CUT OUT points are set in the Control>Tuning menu and should not require modifi cation. The CUT IN point indicates the point, based on the heater loop output, at which the stage is enabled. The CUT OUT point indicates the point, based on the heater loop output, at which the stage is disabled. See Figure 7 for a graphical representation of the control logic.
Figure 7- Heater Staging- Pre/Post Heat In this example, the following CUT IN’s and CUT OUT’s are used for the digital staging: CUT IN CUT OUT
Stage 2 50% 45%
When the number of stages is selected in the Factory>Confi guration menu, the CUT IN and CUT OUT % values are automatically set. These values are adjustable but should not need to be modifi ed in most cases.
4.2.9 Sensor Failure
A. Sensor failure occurs when an analog input reads a value from a sensor that is outside the acceptable range. This indicates a malfunctioning sensor or analog input. Sensor failure can be enabled in the Factory>Sensors menu. Sensor failure can be enabled for each analog input (factory default = Yes). Either a Low or High range failure logic can be selected (factory default = Low (open loop)) for each analog input. This logic detects an open or broken sensor wire or failed sensor element which is typical.
B. If a sensor failure occurs, an alarm is generated. This alarm is a warning indicating that the analog input has read a value outside of the expected range. No further action occurs within the dehumidifi er.
C. Critical failure - Each sensor failure can be defi ned as critical or non-critical (factory default = non-critical). This is defi ned in the Factory>Sensors menu. If the critical variable is set to Yes, a sensor failure at that particular analog input shuts down the dehumidifi er and generates an alarm condition. All applicable purge timers remain active after this shutdown occurs. If the critical variable is set to NO, a sensor failure at that particular analog input still generates an alarm condition but no further action occurs within the dehumidifi er.
4.2.10 Static Pressure Control
A. Static pressure control of the process blower is optional and is enabled in the Factory>Confi guration menu. If the dehumidifi er is ordered with this option, it will be confi gured at the factory. P/I discharge or P/I space control is utilized as a standard.
B. If the static pressure control option is enabled, a static pressure set point screen is displayed in the
Control>Setpoints menu, a tuning screen is displayed in the Control>Tuning menu and a monitoring screen is displayed in the Info menu loop.
C. A static pressure sensor is required and is mounted in the unit discharge or the controlled space. The sensor signal is used as the process variable for the static pressure control loop. A 0-10VDC control output will be provided and indicated on the electrical drawing. A factory installed Variable Frequency Drive (VFD) may be provided as an option. If a VFD is provided, the 0-10VDC output is used to directly control the Process Blower VFD to maintain space or discharge static pressure.
4.2.11 Unit Shutdown
A. Reactivation Purge - When the mode selector switch (S15) is placed in the Off position, the dehumidifi er enters a purge mode. During this mode of operation, the process blower and reactivation heaters are disabled but the reactivation blower and rotor rotation drive continue to operate. This purges residual heat from the rotor and reactivation duct. The dehumidifi er remains in the purge mode until the reactivation discharge and heater temperatures fall below 100°F, or after 5 minutes elapses (adjustable), whichever occurs fi rst.
(Oct, 2011)
5.0 MENU
SCREENS
5.1 Main
Menu
The Main Menu is accessed by pressing the Prg key.
MAIN MENU FACTORY
REM CTRL
INFOThe menu screens that follow are used to access the available menu loops. You may scroll through the menu loop categories using the Up ( ) and Down ( ) arrow keys. From the Main Menu screens you may select from among the
following menu loops by pressing the Enter ( ) key.
"Rem Ctrl"- Allows you to enable/disable the unit from the display keypad. No password is needed at this level but the Remote Keypad Control option must be enabled in the Factory>Confi guration menu in order to access this menu loop.
"Info"- Displays basic read-only status information. Allows you to monitor system operation. No password is needed at this level.
"Alarm Log"- Displays all alarms in sequential order with a time and date stamp. No password is needed at this level. "Control"- Allows modifi cation of basic control parameters such as operating set points and control output tuning. Level 1 password is needed to enter this menu.
"Service"- Allows modifi cation of advanced control parameters such as analog inputs/outputs, BMS set-up and permits the user to save customer parameters or reset the controller to the customer or factory default values. Level 2 password is needed to enter this menu.
"Factory"- Allows modifi cation of more advanced control parameters such as sensor offsets and reactivation control parameters. Level 3 password is needed to enter this menu. Entry to the Factory menu is intended for qualifi ed technicians, working under the guidance of SATS Product Support, during start-up and commissioning of the system. The password to enter this menu may be obtained by contacting SATS Product Support (see Section 8.0 of this manual).
5.2 Remote Control Menu Loop
This menu loop may be accessed only if your unit is confi gured for the display keypad On/Off control option. No
password is needed to enter this menu loop. Upon pressing the Enter ( ) key, the following screen is displayed (no
screen appears if your unit is not confi gured for remote keypad control):
From this screen you may bypass the Remote Start switch and turn the unit On or Off using the display keypad (mode selector switch must be in the "Remote" position). Use the Up and Down arrow keys to enable/disable the unit from this screen. The remote On/Off control status is stored in permanent, (non-volatile) memory. In the event of a power outage, the controller retains the status that was active at the time of the outage and the unit returns to that status when power is restored.
NOTE: Display screens shown with a dashed border appear only if the applicable feature is enabled.
5-1
REMOTE UNIT CONTROL
USE OR TO CHANGE
OFF
5.3 Information Menu Loop
The Info menu screens may be accessed from the Main Info screen by scrolling with the Up ( ) and Down ( ) arrow keys. The same screens may also be viewed if you enter the Info menu by pressing the "Prg" key. When the word
"Info" is centered in the screen in bold capital letters with an arrow symbol
pointing toward the Enter ( ) key, you may press the Enter key to access
that menu loop. The Info menu display screens provide current temperature and relative humidity or dewpoint conditions and shows the current operating modes for the system. There are no adjustable parameters in this menu loop. In the Info menu loop you may view the following display screens as they apply to the unit confi guration:
5.3.1 Main Info Screen, Operating Conditions
The fi rst Info screen is the Main Info screen. It displays "state of operation" icons which provide a current overview of the unit and the operating conditions. The icons are animated to show that each component is operating properly The temperature displayed directly above the reactivation heater icon is the reactivation heater temperature. The temperature displayed directly above the reactivation blower icon is the discharge temperature. Depending on the unit confi guration, Process Temperature and Relative Humidity or Dew Point may be displayed to the left of the process blower icon.
Depending on the reactivation control method used, the next screen (above) displays the current value of the
condition being controlled in the Discharge (if a process air outlet control sensor is utilized) or Space (if the conditions in a space are being controlled). The display indicates either relative humidity or dew point. If C-Trol II reactivation control is used, the screen displays the dew point temperature of the space and the temperature measured by the cold surface sensor. No screen appears if the unit is confi gured for D-Stat reactivation control.
Displays the temperature of the reactivation heater (air leaving the heater) and the temperature of the reactivation discharge (air leaving the reactivation segment of the desiccant rotor).
Displays the proportional output signal controlling the reactivation heater(s). If there is more than one heater bank, the display also indicates the number of stages currently active.
Press Enter ( ) Key
Press ( ) or ( ) Key MAIN MENU REM CTRL
INFO
ALARM LOG DATE TIME DISCHARGE DP20.5°F
COLD SURFACE TEMP
34.5°F
(C-Trol II) Or (H-Trac) Or DATE TIME DISCHARGERH
50.5%
(Dew-Trac) DATE TIME SPACEDP
28.5°F
Press ( ) or ( ) Key Press ( ) or ( ) Key(Continued on next page) DATE TIME REACT HEATER
T 290.0°F
REACT DISCHARGET 135.0%
DATE TIMEREACT HEATER OUTPUT
(Oct, 2011)
5-3
Available with P/I reactivation control methods (H-Trac, Dew-Trac, C-Trol II), the Energy Savings Feature conserves energy by shutting down reactivation when dehumidifi cation is not required. (Not available with D-Stat reactivation control.) If the E² controller’s reactivation control output remains below a user selectable set point for an adjustable time period, reactivation is disabled. Reactivation is re-enabled once the control output rises above the Energy Savings differential value. This feature may be enabled in the Control>Tuning menu screen (see Section 5.4).
The next screen (shown above) varies depending upon the reactivation control method. It displays the control set point. The value shown depends upon the reactivation control method (Dew-Trac, H-Trac or C-Trol II) and the location of the control sensor (discharge or space). No screen appears if the unit is confi gured for D-Stat reactivation control.
(Info menu continued from previous page)
The Static Pressure screen appears if process blower VFD speed control is enabled in the Factory>Confi guration menu. It displays the static pressure of the space or discharge as measured by a static pressure sensor/transmitter (provided optionally).
Press ( ) or Esc key to return to the Main Info screen.
DATE TIME STATIC PRESSURE
473mI
Press ( ) or ( ) Key DATE TIME REACTIVATION ENERGY SAVINGS:OFF CUT OUT: 5.0% DIFFERENTIAL: 4.0% LOOP OUTPUT: 100.0% IDLE TIMER: 20 MIN(C-Trol II) Or (H-Trac) Or DATE TIME DISCHARGE RELATIVE HUMIDITY SETPOINT
