Related Documentation........................................................................................... 5
Control Strategies.................................................................................................... 6
System Enable Determination................................................................................................. 6
System Pump Control ............................................................................................................. 6 System Pump Types ......................................................................................................... 6 Lead Pump Identity Determination.................................................................................... 6 System Pump Sequencing................................................................................................ 7 System Pump Operation—Bypass Differential Control ..................................................... 8 System Water Flow Proof ................................................................................................. 8
Temperature Control ............................................................................................................... 9 Setpoint Determination...................................................................................................... 9 Lead Heat Exchanger Identity Determination ................................................................... 9 Controlled Devices .......................................................................................................... 10 Isolation Valve Operation ................................................................................................ 10 Isolation Valve Status...................................................................................................... 10
PID Tuning ............................................................................................................................ 11 Integral Time ................................................................................................................... 11 Proportional Band ........................................................................................................... 11
FX Builder Application Wizard Concepts ............................................................ 11
Installing the HWS-HX Application Package......................................................................... 11
Selecting the HWS-HX System Application Template .......................................................... 14
Configuring the HWS-HX Application.................................................................................... 15 Configuring the Control Strategy..................................................................................... 15
Viewing the Configuration Summary..................................................................................... 20
Selecting the User Interface and Supervisor Interface.......................................................... 20
Selecting the Target Device .................................................................................................. 21
Selecting the Target Device .................................................................................................. 22
Configuring the Hardware I/Os.............................................................................................. 23
Generating the Application Files and Documentation ........................................................... 24
Viewing Generated Application and Documentation Files .................................................... 26
Reviewing an Exported Application File................................................................................ 26
FX CommPro Concepts......................................................................................... 28
User Interface Concepts........................................................................................ 28
Medium User Interface..........................................................................................................28 Medium User Interface Capabilities ................................................................................ 29 Medium User Interface Navigation.................................................................................. 29 System Folder ................................................................................................................. 30 Config Folder................................................................................................................... 30 HW Pumps Folder........................................................................................................... 31 Heat Exch Folder ............................................................................................................ 32 Setpoints Folder .............................................................................................................. 33 Parameters Folder .......................................................................................................... 33 PID Parameters Folder ................................................................................................... 34
MUI Status LEDs................................................................................................................... 35 Accessing a Folder in the MUI ........................................................................................ 35 Changing a Configuration Setting, Setpoint, or Parameter in the MUI............................ 35
LCD2x4 User Interface..........................................................................................................36 LCD2x4 User Interface Capabilities ................................................................................ 36 LCD2x4 User Interface Navigation.................................................................................. 37 Config Page ....................................................................................................................38 Events Page....................................................................................................................43 Accessing a Page in the LCD2x4 UI ............................................................................... 44 Changing a Configuration Setting, Setpoint, or Parameter in the LCD2x4 UI................. 44
2 Hot Water System – Heat Exchanger Application Note
Hot Water System – Heat Exchanger Controller Application Note
Introduction This application note introduces the Hot Water System–Heat Exchanger (HWS-HX) application template, provides procedures to configure the application using FX Builder’s Application Wizard, and explains how to commission the system using the Integral and Medium User Interface and FX CommPro.
The HWS-HX application template consists of a single application software file, which includes multiple configuration options and control strategies for controlling different types of Heat Exchangers. You use FX Builder’s Application Wizard to select the specific configuration options and control strategies for your specific heating system control requirements. The allowable HWS-HX configuration options appear in Table 1.
Hot Water System—Heat Exchanger Application Note 3
Table 1: HWS-HX Control Strategy and Configuration Options Configuration Settings Allowable Options System Type Single Valve
1/3—2/3 Valves Heat Exchanger Quantity One
Two Lead Heat Exchanger Selection Heat Exchanger 1
Heat Exchanger 2 Isolation Valve Control No
Yes Isolation Valve Status No
Yes Pump Type Constant Volume
Variable Volume Bypass DP Control
Lead Pump Strategy Equal Runtime Manual Lead Select
Pump Status No Yes
Pump Alarm Setup Automatic Reset Manual Reset
Lead Pump Selection Pump 1 Pump 2
Figure 1: Heat Exchanger Application Architecture
4 Hot Water System – Heat Exchanger Application Note
Related Documentation Table 2: Related Documentation For Information On See Document LIT or Part Number FX06 Overview Information FX06 Field Controller
Product Bulletin LIT-12011165
FX06 Technical Information FX06 Field Controller Technical Bulletin
LIT-12011166
FX07 Overview Information FX07 Field Controller Product Bulletin
LIT-12011268
FX07 Technical Information FX07 Field Controller Technical Bulletin
LIT-12011269
FX14 Overview Information FX14 Field Controller Product Bulletin
LIT-12011163
FX14 Technical Information FX14 Field Controller Technical Bulletin
LIT-12011164
FX15 Overview Information FX15 Field Controller Product Bulletin
LIT-12011082
FX15 Technical Information FX15 Controller Technical Bulletin
LIT-12011107
FX16 Overview Information FX16 Master Controller Product Bulletin
LIT-12011084
FX16 Technical Information FX16 Master Controller Technical Bulletin
LIT-12011108
Network Room Module Overview Information
Network Room Module Product Bulletin
LIT-12011257
Network Room Module Technical Information
Network Room Module Technical Bulletin
LIT-12011258
Using the Application Wizard
FX Tools Software Package – FX Builder User’s Guide
LIT-12011154
FX Tools Software Package – FX CommPro N2 User’s Guide
LIT-12011152 Downloading and Commissioning
FX Tools Software Package – FX CommPro BACnet User Guide
LIT-12011240
Hot Water System—Heat Exchanger Application Note 5
Control Strategies The HWS-HX application is configurable, allowing you to choose control options as needed for your specific application requirements.
System Enable Determination The HWS-HX enables the system when the outside air temperature falls below the System Enable setpoint. Alternatively, the HWS-HX enables the system from a network command, with the network command having priority.
When the system is enabled the HWS-HX operates the system pumps and valves according to their control sequence.
System Pump Control System pumps control the hot water supply flow to the system loop.
System Pump Types The HWS-HX application supports the following types of system pump control options:
• Constant Volume: when you select this option, the HWS-HX application provides binary (on/off) output to start or stop up to two system pumps.
• Variable Volume: when you select this option, the HWS-HX application provides binary (on/off) and analog (modulating) outputs to start/stop up to two system pumps and their corresponding variable speed drives to satisfy the supply water differential pressure setpoint.
• Bypass Differential Pressure Control: when you select this option, the HWS-HX application provides binary (on/off) outputs to start/stop up to two system pumps and an analog (modulating) output to proportionally modulate a bypass valve to satisfy the supply water differential pressure setpoint.
Lead Pump Identity Determination The HWS-HX application supports one or two system pumps. When two pumps are selected, the HWS-HX application provides the following two options to determine the lead pump identity:
• Equal Runtime: when you select this option, the HWS-HX application identifies the pump with the lowest runtime as the lead pump.
• Manual: when you select this option, the HWS-HX application identifies the pump which is manually selected (via a configuration parameter) as the lead pump.
6 Hot Water System – Heat Exchanger Application Note
System Pump Sequencing The actual sequencing of the system pump depends on the system pump type (constant volume, variable volume, or bypass differential control) you select.
System Pump Operation—Constant Volume When the system is enabled, the HWS-HX application starts the lead system pump and it remains energized until the system is disabled. The second pump is not started during this cycle unless you manually select it (see section System Water Flow Proof for more details).
System Pump Operation—Variable Volume When the system is enabled, the HWS-HX application starts the lead system pump and it remains energized until the system is disabled. The HWS-HX application uses a PID controller (comparing the actual value of the system water pressure to its setpoint) to determine:
• the speed of the lead pump’s variable speed drive
• whether or not to add the second pump
• the speed of the second pump’s variable speed drive
As the PID controller output rises between 0 and 50%, the HWS-HX application increases the speed of the lead pump from minimum to full speed. When the PID controller output reaches 50%, the HWS-HX application starts the second pump. As the PID controller output rises between 50 and 100%, the HWS-HX application increases the speed of the second pump from minimum to full speed. See Figure 2 and Figure 3.
Figure 2: System Pump Operation Example 1
Hot Water System—Heat Exchanger Application Note 7
Figure 3: System Pump Operation Example 2
System Pump Operation—Bypass Differential Control When the system is enabled, the HWS-HX application starts the lead pump, and it remains energized until the system is disabled. The HWS-HX application uses a PID controller (comparing the actual value of the system water pressure to its setpoint) to determine the proper bypass valve position to achieve the pressure setpoint.
System Water Flow Proof The HWS-HX application supports an optional feature to monitor the actual status of the system pump. When you select this option, the HWS-HX application provides one binary input for each system pump to monitor its actual status (as determined by an external flow switch). The HWS-HX application compares the actual system pump status to its command and operates according to the states shown in Table 3.
Table 3: No System Water Flow State Description Normal The HWS-HX application enters this state when the pump behavior
matches the pump command. Manual Reset Fault
The HWS-HX application enters this state because there is no proof of water flow and the unit requires manual intervention to restart. In this state, the lead system pump remains energized, and If more than one system pump is selected, then the application starts the second pump. An alarm output is generated. The Heat Exchanger valves remain closed if flow is not proven.
Self Reset Fault
The HWS-HX application enters this state because there is no proof of water flow and the unit does not require manual intervention to restart. In this state, the lead system pump remains energized, and If more than one system pump is selected, then the application starts the second pump. The Heat Exchanger valves remain closed if flow is not proven.
8 Hot Water System – Heat Exchanger Application Note
Temperature Control The HWS-HX application sequences the controlled devices to control the hot water supply temperature to a constant or reset schedule setpoint.
Setpoint Determination The HWS-HX application supports the following two options for determining the heating water supply temperature setpoint:
• Fixed Setpoint: when you select this option, the HWS-HX application modulates the valves to satisfy a constant hot water supply temperature setpoint. This setpoint is a user-adjustable parameter.
• Reset Setpoint: when you select this option, the hot water supply temperature setpoint is a calculated value and varies inversely to the outside air temperature. The reset schedule parameters (see Figure 2) are user-adjustable.
Figure 2: Hot Water Supply Temperature Setpoint Reset by Outside Air Temperature
Lead Heat Exchanger Identity Determination The HWS-HX application supports one or two heat exchangers. When two heat exchangers are selected, the lead heat exchanger is manually selected. Only one heat exchanger is active at any time.
Hot Water System—Heat Exchanger Application Note 9
Controlled Devices The HWS-HX application supports the following two types of controlled devices:
• Single Valve Heat Exchanger: when you select this option, the HWS-HX Application provides analog outputs to modulate the valve.
• 1/3—2/3 Valve Heat Exchanger: when you select this option, the HWS-HX application provides 2 analog outputs to modulate the valves in sequence.
Isolation Valve Operation The HWS-HX application supports the following options for controlling the isolation valve of the heat exchanger:
• No: when you select this option, the HWS-HX application does not provide any outputs for isolation valve control.
• Yes: when you select this option, the HWS-HX application provides one binary (on/off) output to open/close one isolation valve for each heat exchanger. If you select to have the heat exchanger isolation valves controlled, the valve is commanded open after the need for a heat exchanger is requested. When the heat exchanger is no longer required (system disabled), the heat exchanger is disabled and the isolation valve remains open for 1 minute.
Isolation Valve Status The HWS-HX application supports an optional feature to monitor the actual status of the isolation valve. When you select this option, the HWS-HX application provides one binary input for each isolation valve to monitor its actual status (as determined by a valve end switch). The HWS-HX application compares the actual isolation valve status to its command and the isolation valve must prove open before the Heat Exchanger valves are allowed to modulate. An alarm output is available for each Heat Exchanger isolation valve.
10 Hot Water System – Heat Exchanger Application Note
Device Availability Determination Based on outdoor temperature, the HWS-HX application locks out heating (via High Outside Air Temperature Lockout for Heating lockout setpoint).
PID Tuning If tuning is required, you must manually tune the PIDs in this application. All of the default temperature control PID tuning parameters are based on a hot water return temperature control process.
Integral Time The time required by the integral action to contribute the same amount to the controller output as the proportional term for a constant error.
Proportional Band The amount of change in the Process Variable that produces a full range change (High Limit - Low Limit) in the Present Value. It must be greater than zero.
FX Builder Application Wizard Concepts The FX Builder software tool allows you to create and export application software for FX Field Controllers. FX Builder includes an Application Wizard, which allows you to easily create application software from predefined templates. These application templates are factory designed and tested and include several configuration options for you to choose from.
The HWS-HX application template includes predefined features and functionality that you can select, enable/disable, and adjust with the Application Wizard. Examples of configuration options include:
• heating configuration
• configurable control strategies
• adjustable setpoints, parameters, and tuning parameters
• selectable user interface and supervisory interface
• configurable input/output types and channel assignments
The following sections provide detailed procedures on how to use FX Builder’s Application Wizard to install and select the HWS-HX application template and to configure and export a unique HWS-HX application file.
Installing the HWS-HX Application Package To install the HWS-HX Application Package:
Hot Water System—Heat Exchanger Application Note 11
1. Obtain the HWS-HX Application Package and save it to your local hard disk.
2. Launch FX Builder.
3. From the Settings menu, select Application Wizard Preferences. The Application Wizard Preferences dialog box appears (Figure 16).
12 Hot Water System – Heat Exchanger Application Note
Figure 4: Application Wizard Preferences Dialog Box without Packages
Installed
4. Under File Preferences, select the documents you want to generate. Documentation types which you can select include:
Note: The default generates all three types of documentation. We highly recommend you keep the preferences at these defaults, so that all documentation types are generated.
5. If desired, change the File Location to where the generated files are exported.
6. Click Install… and navigate to the location of the HWS-HX application Package as performed in Step 1.
7. Select the HWS-HX.dbe Application Package and click Open. The Application Package is installed in the Application Wizard Preferences dialog box (Figure 5).
Hot Water System—Heat Exchanger Application Note 13
Figure 5: Application Wizard Preferences Dialog Box with HWS-HX Package
Packages Installed
8. Click OK.
Selecting the HWS-HX System Application Template To select the HWS-HX application template:
1. Open FX Builder.
2. From the File menu, select Application Wizard. The Select an Application Template window appears.
3. On the left side of the window, open the Central Plant folder and select the HWS-HX application Template (Figure 6).
14 Hot Water System – Heat Exchanger Application Note
Figure 6: Selecting the HWS-HX application Template
4. Click Next. A status bar appears while the selected application template and plug-ins are loaded into FX Builder (Figure 7).
Figure 7: Loading Application Status Bar
The Configure plug-in appears when the application is loaded.
Configuring the HWS-HX Application The Configure dialog contains tabbed views of the control strategy configuration options, setpoints, and parameters that you can select and adjust in the HWS-HX application.
Configuring the Control Strategy To configure the control strategy:
1. Click the Configuration tab. The HWS-HX application’s control strategy configuration options and default values appear (Figure 8).
Hot Water System—Heat Exchanger Application Note 15
Figure 8: HWS-HX Configuration Plug-in
2. Modify the configuration settings as needed. Use Table 4 as a reference.
Mechanical Configuration System Type Select the type of heat
exchanger controller Single Valve 1/3—2/3 Valves
Quantity Select the quantity of heat exchangers
One Two
Lead Heat Exchanger Selection
Select the lead heat exchanger HX1 (heat exchanger 1) HX2 (heat exchanger 2)
Isolation Valve Control
Enable control of the heat exchanger isolation valves
No Yes
Isolation Valve Status
Do the heat exchanger isolation valves have status?
No Yes
Pump Type Select the type of main hot water building pumps
Constant Volume Variable Volume Bypass DP Control
Lead Pump Strategy Select the lead pump control strategy
Equal Runtime Manual Lead Select
Pump Status Do the main pumps have status? No Yes
Pump Alarm Setup Enable alarming of main pump/status mismatch?
Automatic Reset Manual Reset
Lead Pump Selection Select the lead pump Pump1 Pump2
Sensor Setup Add an optional hot water return sensor?
No Yes
16 Hot Water System – Heat Exchanger Application Note
Adjusting Setpoints The Setpoints tab contains the setpoints that you can adjust in the HWS-HX application.
To adjust setpoints:
1. Click the Setpoints tab. The HWS-HX application’s setpoints and their default values appear (Figure 9).
Figure 9: Setpoints Plug-in
2. Adjust the setpoints as needed. Use Table 5 as a reference.
Table 5: HWS-HX Setpoints Configuration Setting
Description Allowable Options
Heating Setpoints Enable Setpoint Heating system outside air
enable setpoint 0-100°F (-18-38°C)
Htg Enable Diff Heating system outside air enable differential
0-25 °F (-18-4°F)
HW Reset Enable Reset hot water setpoint from outside air temp?
Enable Disable
Fixed HW Setpoint Fixed hot water supply temperature setpoint
100-300°F (38-149°C)
HW OAT Reset Low (X1)
Outside Air Temperature Low Limit (X1)
-10-50°F (-23-10°C)
HW OAT Reset High (X2)
Outside Air Temperature High Limit (X2)
55-100°F (13-38°C)
HW Reset High (Y1) Hot Water Supply Temperature Setpoint Reset High Limit (Y1)
150-200°F (66-93°C)
Blr HW Reset Low (Y2)
Hot Water Supply Temperature Setpoint Reset Low Limit (Y2)
100-140°F (38-60°C)
Continued on next page . . .
Hot Water System—Heat Exchanger Application Note 17
Configuration Setting (Cont.)
Description Allowable Options
Hot Water Pump Diff Press SP
Hot water Pump Differential Pressure Setpoint
0-100 psi
Bypass Vlv Diff Press SP
Bypass Valve Differential Pressure Setpoint
0-100 psi
Adjusting Parameters The Parameters tab contains the system parameters that you can adjust in the HWS-HX application.
To adjust parameters:
1. Click Parameters. The HWS-HX system parameters and their default values appear (Figure 10).
Figure 10: Parameters Tab
2. Adjust the system parameters as needed. Use Table 6 as a reference.
Table 6: HWS-HX System Parameters Parameter Type Description Adjustment Range HX System HW Pump Alarm Delay Hot Water Pump Alarm
Delay Time 0-300 seconds
Iso Vlv Alarm Delay Isolation Valve Alarm Delay Time
0-300 seconds
18 Hot Water System – Heat Exchanger Application Note
PID Parameters The PID Parameters tab contains the tuning parameters (proportional bands, integration times, and saturation times) that you can adjust in the HWS-HX application.
To adjust PID parameters:
1. Click PID Parameters. The HWS-HX application’s PID Parameters and default values appear (Figure 11).
Figure 11: PID Parameters Tab
2. Modify the PID Parameters as needed. Use Table 7 as a reference:
Table 7: HWS-HX PID Parameters Parameter Type Description Adjustment
Range HW PB Enter the hot water supply
temperature control proportional band.
0 to 100°F (-18-38°C)
HW Int Time Enter the hot water supply temperature control integration time.
0-6,553 seconds
HW Pump PB Enter the pump differential pressure control proportional band.
0 to 100 psi
HW Pump Int Time Enter the pump differential pressure control integration time.
0-6,553 seconds
Bypass Vlv PB Enter the bypass valve differential pressure control proportional band.
0 to 100 psi
Bypass Vlv Int Time Enter the bypass valve differential pressure control integration time.
0-6,553 seconds
Hot Water System—Heat Exchanger Application Note 19
Viewing the Configuration Summary The Config Summary tab provides a summary for all configuration settings, and setpoint and parameter adjustments, made during the configuration session.
2. View the summary here or, to save the summary to a document, right-click the summary information and select Copy to clipboard, then paste it into a document.
Figure 12: Configuration Summary Window
Selecting the User Interface and Supervisor Interface The Choose Interfaces dialog box provides User Interface and Supervisor Interface options. Click Previous to return to the Configuration session to select different configuration options or to change setpoints and parameters.
To select the user interface and supervisor interface:
1. Choose the desired User Interface.
2. Choose the desired Network Protocol.
3. Click Next to select the FX controller. The Select Target Device dialog box appears.
20 Hot Water System – Heat Exchanger Application Note
Selecting the Target Device The Select Target Devices dialog box provides options for the target controller based on the configuration settings you selected.
To select the target device:
1. Select a device and click Next.
Figure 13: Choose Interfaces Dialog Box
2. Click Next to select the FX controller. The Select Target Device dialog box appears (Figure 14).
Hot Water System—Heat Exchanger Application Note 21
Selecting the Target Device The Select Target Devices dialog box provides options for the target controller based on the configuration settings you selected.
The Configure Hardware I/O window appears (Figure 15).
Note: If the device you want to use does not appear in the list of approved devices, click the Rejected Devices tab and view the reason for the rejection. You can also click the Exclusion Details button for more details. Then, based on the rejection reasons, click Previous to return to the configuration plug-ins and edit the appropriate configuration to configure the device so it is an approved device for the application.
Figure 15: Rejected Devices Tab
22 Hot Water System – Heat Exchanger Application Note
Configuring the Hardware I/Os The Configure Hardware I/O window is organized into tabs based on I/O type (Analog Inputs, Analog Outputs, and Digital Outputs).
To configure the hardware I/Os:
1. Click the Analog Inputs tab. Change the Sensor Type and Channel Number for the desired objects (Figure 16).
Note: Each Channel Number must be unique. The Status column alerts you with a yellow alert symbol if multiple channels are assigned the same number. Correct the Channel Number so each channel has a unique number and all Status symbols are green (Figure 19).
Figure 19: Channel Number Status Alert
5. Click Next. The Generate Application dialog box appears.
Generating the Application Files and Documentation This is the final step in creating and generating the Application files and documentation.
To generate the application files and documentation:
1. Edit or enter a Name for the Application.
2. Enter the name of the Application designer in the Prepared By field (or department name, employee ID, other relevant information), if desired.
3. Enter information relevant to the Application, design, notes for other Application users, or other information in the Description field, if desired.
24 Hot Water System – Heat Exchanger Application Note
4. Navigate to the directory folder where you want the application files to be exported (if different than the Application File default location shown).
5. If desired, change the name of the .apd file in the Application File field, but do not change the .apd extension.
Figure 20: Generate Application Window
6. Click Finish.
The Application Wizard generates the application files and documentation and then closes. The bottom of the FX Builder window displays a status for each loaded application object. When all application objects are loaded, the Generating Documentation status bar displays in the middle of the screen (Figure 21).
Figure 21: Generating Documentation Status Bar
7. Click OK when the Application Compile Completed dialog box appears (Figure 22).
The Application Wizard generates the Application and its corresponding files and documentation. The types of files generated depend on the selections made in the Application Wizard Preferences dialog box and Configuration Options plug-ins.
Hot Water System—Heat Exchanger Application Note 25
Viewing Generated Application and Documentation Files To view generated application and documentation files, go to the destination folder designated in the Application File field.
Reviewing an Exported Application File The Application Wizard includes a synchronization feature that allows you to match an exported application file (*.apd) to its template. This feature allows you to use the Application Wizard screens to review and/or change any of the options, settings, or selections made to an exported application file.
The Open Application dialog box appears (Figure 24).
26 Hot Water System – Heat Exchanger Application Note
Figure 24: Open Application Dialog Box
3. Navigate to the location of your exported *.apd file, select the file and click Open. The Application Wizard reappears, showing if the selected application matches an installed template.
Figure 25: Application Template Match
4. Click Next. The Application Wizard appears, showing the actual configuration settings, setpoints, adjustment parameters, user interface selections, protocol choice, target controller selection, and I/O configurations that were originally made before the application file was exported. You can now use the Application Wizard to view and/or change these settings as desired.
Hot Water System—Heat Exchanger Application Note 27
FX CommPro Concepts FX CommPro is a software tool that you use to perform the following functions: • download the application file to the target controllers
• monitor data points
• issue overrides
• adjust unit setpoints and parameters
For detailed information on downloading and commissioning with FX CommPro, refer to the FX CommPro N2 User’s Guide (LIT-12011152) or FX CommPro BACnet User’s Guide (LIT-12011240).
User Interface Concepts The HWS-HX application template supports a choice of two User Interfaces: the Medium User Interface (MUI) and the LCD2x4 User Interface.
Medium User Interface The MUI (Version 3) is an optional hardware accessory consisting of the following: • 4-line by 26-character Liquid Crystal Display (LCD)
• 6 keys: up, down, left, right, Enter, and Escape
• 10 discrete status Light-Emitting Diodes (LEDs)
Figure 26: Medium User Interface (MUI)
The MUI connects to the Remote Display bus of the FX Field Controller, and you can mount the MUI locally or remotely, or use it as a handheld tool.
28 Hot Water System – Heat Exchanger Application Note
Medium User Interface Capabilities The HWS-HX application template includes a predefined MUI configuration. The MUI configuration organizes information into folders and pages, which you navigate through using the keypad and display.
You use the MUI to perform the following functions:
• monitor control points and system status
• adjust setpoints and unit parameters
• initiate overrides
• select the desired display units of measures
Medium User Interface Navigation Upon powerup, the MUI displays the Home Page showing system information (Table 8).
Table 8: MUI Home Page Contents Display Name Description Units/Enumerati
on System Enable Status System Enable Status Dis/Ena System Enable Ovrd Network System Enable Off/On/Auto/Invalid Outside Air Temp Outside Air Temperature °F/°C HW Supply Temp Hot Water Supply Temperature °F/°C HW Return Temp Hot Water Return Temperature °F/°C HW Diff Press Hot Water System Differential Pressure psi
In addition to the Home Page, the MUI also includes 12 folders of information accessible from the MUI’s Main Menu (Table 9). Table 9: HWS-HX MUI Folders Folder User Access Level Contents System All HX system settings Config All HX application configuration
settings HWPumps All Hot Water Pump points HeatExch All Heat Exchanger 1 points Setpoints All Setpoints Parameters All Miscellaneous setpoints and
parameters PID Parameters All Proportional bands, integration
times, and saturation times Runtime All Runtime data
Hot Water System—Heat Exchanger Application Note 29
System Folder The System folder contains one page showing the system settings made during the Application Wizard session. See Table 10.
Table 10: MUI System Page Contents Display Name Description Units/Enumeration Bypass Vlv Output Bypass Valve Output % Bypass Out Ovr State Bypass Valve Output
Override State Auto/Pos/Max/Min
Bypass Out Ovr Pct Bypass Valve Output Override Percent
%
HX Pump Alm Reset Hot Water Pump Alarm Reset
Off/On/Off
HW PID Out Hot Water PID Output %
Config Folder The Config folder contains one page showing the configuration settings made during the Application Wizard session. These settings are read-only (you cannot change the HWS-HX configuration from the MUI). See Table 11. Table 11: MUI Config Page Contents Display Name Description Units/Enumeration Num of HXs Number Of Heat Exchangers One/Two Iso Vlv Used Heat Exchanger Isolation
Valve Setup No/Yes
Iso Vlv Status Used Heat Exchanger Isolation Vlv Status Setup
No/Yes
HX Pump Setup Hot Water Pump Setup Constant/Variable/Bypass DP
HX Pump Status Used Hot Water Pump Status Setup No/Yes HW Reset Enable Hot Water Reset Enable No/Yes Lead Pump Select Lead Heat Exchanger Pump
Selection Pump1/Pump2
Lead HX Select Lead Heat Exchanger Selection
HX1/HX2
HX Pump Ctrl Hot Water Pump Control Type Man Lead/Equal Run HX Pump Alm Setup Hot Water Pump Alarm Setup Auto/Man
30 Hot Water System – Heat Exchanger Application Note
HW Pumps Folder
The HW Pumps folder contains one page showing the current values/states of the inputs and outputs See Table 12.
Table 12: MUI Pumps Folder Page Contents Display Name Description Units/EnumerationHX1 Pump Cmd Hot Water Pump 1 Command Off/On HX1 Pump Status Hot Water Pump 1 Status Off/On HX1 Pump Alarm Hot Water Pump 1 Alarm Normal/Alarm HX1 Pump Output Hot Water Pump 1 Output % HX1 Pump Cmd Ovr Hot Water Pump 1 Override State Auto/On/Off HX1 Pump OutOvr State Hot Water Pump 1 Output
Override State Auto/Pos/Max/Min
HX1 Pump OutOvr Pct Hot Water Pump 1 Output Override Pct
%
HX HW Pump VSD Out Hot Water Pump VSD Output % HX2 Pump Cmd Hot Water Pump 2 Command Off/On HX2 Pump Status Hot Water Pump 2 Status Off/On HX2 Pump Alarm Hot Water Pump 2 Alarm Normal/Alarm HX2 Pump Output Hot Water Pump 2 Output % HX2 Pump Cmd Ovr Hot Water Pump 2 Override State Auto/On/Off HX2 Pump OutOvr State Hot Water Pump 2 Output
Override State Auto/Pos/Max/Min
HX2 Pump OutOvr Pct Hot Water Pump 2 Output Override Pct
%
HX HW Pump VSD Out Hot Water Pump VSD Out %
Hot Water System—Heat Exchanger Application Note 31
Heat Exch Folder The Heat Exch folder contains one page showing the current values/states of the inputs and outputs. See Table 13. Table 13: MUI Heat Exch Page Contents Display Name Description Units/Enumeration HX1 Iso Vlv Status Heat Exchanger 1 Valve Status Closed/Open HX1 Valve Output Heat Exchanger 1 Valve Output % HX1-1/3 Vlv Output Heat Exchanger 1 1/3 Valve Output % HX1-2/3 Vlv Output Heat Exchanger 1 2/3 Valve Output % HX1 Iso Vlv Cmd Heat Exchanger 1 Isolation Valve
Command Closed/Open
HX1 Iso Vlv Alm Heat Exchanger Isolation Valve 1 Alarm
Normal/Alarm
HX1 Out Ovr State Heat Exchanger 1 Output Override State
Auto/Pos/Max/Min
HX1 Out Ovr Pct Heat Exchanger 1 Output Override Percent
32 Hot Water System – Heat Exchanger Application Note
Setpoints Folder The Setpoints folder contains one page of adjustable setpoints. See Table 14. Table 14: MUI Setpoints Page Contents Display Name Description Units/Enumeration Act HW Setpoint Calculated Hot Water Supply
Temperature Setpoint °F/°C
OAT Htg Ena Sp Outside Air Temperature Heating Enable Setpoint
°F/°C
OAT Htg Ena Sp Df Outside Air Temperature Heating Enable Setpoint Differential
°F/°C
Fixed HW Sp Fixed Hot Water Supply Temperature Setpoint
°F/°C
HWP Diff Pres Sp Hot Water Pump Differential Pressure Setpoint
Parameters Folder The Parameters folder contains one page of adjustable miscellaneous setpoints and unit parameters. See Table 15.
Table 15: MUI Parameters Page Contents Display Name Description Units/Enumeration HX HW Reset Enable Hot Water Reset Enable No/Yes OAT Reset Low Outside Air Temperature Reset
Low °F/°C
OAT Reset High Outside Air Temperature Reset High
°F/°C
HWS Reset Low Hot Water Supply Temperature Setpoint Reset Low
°F/°C
HWS Reset High Hot Water Supply Temperature Setpoint Reset High
°F/°C
HX Pump Alarm Dly Hot Water Pump Alarm Delay Seconds Iso Vlv Alarm Dly Heat Exchanger Isolation Valve
Alarm Delay Seconds
Hot Water System—Heat Exchanger Application Note 33
PID Parameters Folder The PID Parameters folder contains one page of adjustable PID tuning parameters, such as proportional bands, integration times, and saturation times. See Table 16.
Table 16: MUI PID Parameters Page Contents Display Name Description Units/Enumeration Temperature Hot Water Temperature Control
Proportional Band °F/°C
HX HW Int Tm Hot Water Temperature Control Integration Time
Seconds
HX Pump PB Hot Water Pump Differential Pressure Control Proportional Band
psi
HX Pump Int Tm Hot Water Pump Differential Pressure Control Integration Time
Seconds
Byp Vlv PB Bypass Valve Differential Pressure Control Proportional Band
psi
Byp Vlv Int Tm Bypass Valve Differential Pressure Control Integration Time
Seconds
34 Hot Water System – Heat Exchanger Application Note
MUI Status LEDs None of the MUI’s LEDs are configured to light.
Accessing a Folder in the MUI To access a folder in the MUI:
1. On the Home Page, press the ESC key. The Main Menu appears with folder names.
Each folder contains one or more pages of information. None of the folders are password-protected.
2. Press the up or down arrow keys to select the desired folder.
3. Press the OK key to view the folder contents.
Note: Information displayed on the MUI can include read-only data points as well as writable configuration settings, setpoints, and parameters.
Changing a Configuration Setting, Setpoint, or Parameter in the MUI To change a configuration setting, setpoint, or parameter:
1. Navigate to the page containing the desired point.
2. Press the Enter key to enter the edit mode.
3. Press the up or down arrow to select the desired point.
4. Press the Enter key again.
5. Press the up or down arrow key to toggle the entry to the desired setting or value.
6. Press the Enter key to accept or the Clear key to reject.
Hot Water System—Heat Exchanger Application Note 35
LCD2x4 User Interface The LCD2x4 user interface is an optional hardware accessory consisting of the following:
• 2-line by 4-character LCD
• graphical status icons
• four keys: up, down, clear (C), and OK
The LCD2x4 user interface is available only as an integrated part of the FX06, FX07, and FX14 packaging.
Figure 27: FX07 with Integral LCD2x4 User Interface
LCD2x4 User Interface Capabilities The HWS-HX application template includes a predefined LCD2x4 user interface configuration. The LCD2x4 configuration organizes information into folders and pages which you navigate through using the keypad and display.
You use the LCD2x4 to perform the following functions:
• monitor control points and system status
• adjust setpoints and unit parameters
• initiate overrides
• select the desired display units of measures
36 Hot Water System – Heat Exchanger Application Note
LCD2x4 User Interface Navigation Upon powerup, the LCD2x4 displays the Home Page showing system information. See Table 17 for a list of the Home Page contents.
Table 17: LCD2x4 User Interface Home Page Contents Display Name Description Units/Enumeration System Enable Status
System Enable Status Dis = disabled Ena = enabled
System Enable Ovrd
Network System Enable Off = off On = on Auto = automatic Inv = invalid
Outside Air Temp Outside Air Temperature °F/°C HWS Temp Hot Water Supply
Temperature °F/°C
HWR Temp Hot Water Return Temperature
°F/°C
HW Diff Press Hot Water System Differential Pressure
psi
In addition to the Home Page, the LCD2x4 also includes 12 folders of information which you access from the LCD2x4’s Main Menu. See Table 18 for a list of these folders.
Table 18: HWS-HX LCD2x4 Folders Folder User Access
Level Contents
System All HWS-HX system settings Config All HWS-HX application configuration
settings HWPumps All Hot Water Pump points HeatExch1 All Heat Exchanger 1 points HeatExch2 All Heat Exchanger 2 points Setpoints All Setpoints Parameters All Miscellaneous setpoints and
parameters PID Parameters All Proportional bands, integration
times, and saturation times Runtime All Runtime data
Hot Water System—Heat Exchanger Application Note 37
Config Page The Config page is only available to Admin users. The page contains configuration settings made during the Application Wizard session. These settings are read-only (you cannot change the HWS-HX configuration from the LCD2x4). See Table 19. Table 19: LCD2x4 User Interface Config Page Contents Display Name Description Units/Enumeration Num of HXs Number Of Heat
Exchangers One = one Two = two
Iso Vlv Used Isolation Valve Setup No = no Yes = yes
Iso Vlv Status Used
Isolation Valve Status Setup
No = no Yes = yes
HX Pump Setup Hot Water Pump Setup Cons = constant volume Vari = variable volume Byp = bypass differential pressure
HX Pump Status Used
Hot Water Pump Status Setup
No = no Yes = yes
HW Reset Enable
Hot Water Reset Enable No = no Yes = yes
Lead Pump Select
Lead Pump Selection Pmp1 = pump 1 Pmp2 = pump 2
Lead HX Select Lead Heat Exchanger Selection
HX1 = heat exchanger 1 HX2 = heat exchanger 2
HX Pump Ctrl Hot Water Pump Control Type
Man = manual EQRT = equal runtime
HX Pump Alm Setup
Hot Water Pump Alarm Setup
Auto = automatic reset Man = manually reset
38 Hot Water System – Heat Exchanger Application Note
HW Pumps Page The HW Pumps page contains one page showing the current values/states of the inputs and outputs See Table 20.
Table 20: LCD2x4 User Interface HW Pumps Page Contents Display Name Description Units/Enumeration HWP1 Cmd Hot Water Pump 1 Command Off = off
On = on HWP1 Status Hot Water Pump 1 Status Off = off
On = on HWP1 Alarm Hot Water Pump 1 Alarm Norm = normal
Alm = in alarm HWP1 Output Hot Water Pump 1 Output Pct (%) HWP1 Cmd Ovr Hot Water Pump 1 Override
State Auto = auto On = on Off = off
HWP1 Out Ovr State
Hot Water Pump 1 Output Override State
Auto = auto Pos = manual position Max = maximum position Min = minimum position
HWP1 Out Ovr Pct
Hot Water Pump 1 Output Override Percent
Pct (%)
HWP2 Cmd Hot Water Pump 2 Command Off = off On = on
HWP2 Status Hot Water Pump 2 Status Off = off On = on
HWP2 Alarm Hot Water Pump 2 Alarm Norm = normal Alm = alarm
HWP2 Output Hot Water Pump 2 Output Pct (%) HWP2 Cmd Ovr Hot Water Pump 2 Override
State Auto = auto On = on Off = off
HWP2 Out Ovr State
Hot Water Pump 2 Output Override State
Auto = auto Pos = manual position Max = maximum position Min = minimum position
HWP2 Out Ovr Pct
Hot Water Pump 2 Output Override Percent
Pct (%)
HW Pump VSD Out
Hot Water Pump VSD Output Pct (%)
Hot Water System—Heat Exchanger Application Note 39
Heat Exch 1 Page The Heat Exch 1 page contains one page showing the current values/states of the inputs and outputs See Table 21.
Table 21: LCD2x4 User Interface Heat Exch 1 Page Contents Display Name Description Units/Enumeration HX1 Iso Vlv Cmd Heat ExchangerX1 Valve
Command Clos = closed Open = open
HX1 Iso Vlv Status
Heat Exchanger 1 Valve Status
Clos = closed Open = open
HX1 Iso Vlv Alm Heat Exchanger 1 Isolation Valve Alarm
Norm = normal Alm = in alarm
HX1 Iso Vlv Ovr State
Heat Exchanger1 Output Override State
Auto = auto Pos = manual position Open = open Clos = closed
HX1 Valve Output Heat Exchanger1 Valve Output
Pct (%)
HX1 Out Ovr State
Heat Exchanger 1 Output Override State
Auto = auto Pos = manual position Open = open Clos = closed
HX1 Out Ovr Pct Heat Exchanger 1 Output Override Percent
Pct (%)
HX1-1/3 Vlv Output
Heat Exchanger1 1/3 Valve Output
Pct (%)
HX1-1/3 Out Ovr State
Heat Exchanger1 1/3 Valve Output Override State
Auto = auto Pos = manual position Open = open Clos = closed
HX1-1/3 Out Ovr Pct
Heat Exchanger1 1/3 Valve Output Override Percent
Pct (%)
HX1-2/3 Vlv Output
Heat Exchanger 11 2/3 Valve Output
Pct (%)
HX1-2/3 Out Ovr State
Heat Exchanger1 2/3 Valve Output Override State
Auto = auto Pos = manual position Open = open Clos = closed
40 Hot Water System – Heat Exchanger Application Note
Heat Exch 2 Page The Heat Exch 2 page contains one page showing the current values/states of the inputs and outputs See Table 22. Table 22: LCD2x4 User Interface Heat Exch 2 Page Contents Display Name Description Units/Enumeration HX2 Iso Vlv Cmd Heat Exchanger 2 Valve
Command Clos = closed Open = open
HX2 Iso Vlv Status
Heat Exchanger 2 Valve Status
Clos = closed Open = open
HX2 Iso Vlv Alm Heat Exchanger 2 Isolation Valve Alarm
Norm = normal Alm = in alarm
HX2 Iso Vlv Ovr State
Heat Exchanger 2 Output Override State
Auto = automatic Pos = manual position Open = open Clos = closed
HX2 Valve Output Heat Exchanger 2 Valve Output
Pct (%)
HX2 Out Ovr State
Heat Exchanger 2 Output Override State
Auto = auto Pos = manual position Open = open Clos = closed
HX2 Out Ovr Pct Heat Exchanger 2 Output Override Percent
Pct (%)
HX2-1/3 Vlv Output
Heat Exchanger 2 1/3 Valve Output
Pct (%)
HX2-1/3 Out Ovr State
Heat Exchanger 2 1/3 Valve Output Override State
Auto = auto Pos = manual position Open = open Clos = closed
42 Hot Water System – Heat Exchanger Application Note
Parameters Page The Parameters folder is only available to Admin users; it contains one page of adjustable miscellaneous setpoints and unit parameters. See Table 25. Table 25: LCD2x4 User Interface Parameters Page Contents Display Name Description Units/EnumerationHX HW Reset Enable
Hot Water Temperature Reset Enable
No = no Yes = yes
OAT Reset Low Outside Air Temperature Reset Low
°F/°C
OAT Reset High Outside Air Temperature Reset High
°F/°C
HWS Reset Low Hot Water Supply Temperature Reset High
°F/°C
HWS Reset High Hot Water Supply Temperature Reset Low
°F/°C
HX Pump Alarm Delay
Hot Water Pump Alarm Delay Seconds
HX Iso Vlv Alarm Delay
Heat Exchanger Isolation Valve Alarm Delay
Seconds
PID Parameters Page The PID Parameters page is available only to Admin users; it contains adjustable PID tuning parameters, such as proportional bands, integration times, and saturation times. See Table 26.
Table 26: LCD2x4 User Interface PID Parameters Page Contents Display Name Description Units/EnumerationHX HW PB Hot Water Temperature Control
Proportional Band °F/°C
HX HW Int Tm Hot Water Temperature Control Integration Time
Seconds
HX Pump PB Hot Water Pump Differential Pressure Control Proportional Band
psi
HX Pump Int Tm Hot Water Pump Differential Pressure Control Integration Time
Seconds
Byp Vlv PB Bypass Valve Differential Pressure Control Proportional Band
psi
Byp Vlv Int Tm Bypass Valve Differential Pressure Control Integration Time
Seconds
Events Page No events are configured.
Hot Water System—Heat Exchanger Application Note 43
Accessing a Page in the LCD2x4 UI To access a page in the LCD2x4 UI:
1. On the Home Page, press the Clear (C) key. The Main Menu appears with page names.
2. Press the up or down arrow keys to select the desired page.
Note: Some pages require Admin logon.
3. Press the OK key to view the page contents. Use the up and down arrows to scroll through the points.
Note: Information displayed on the LCD2x4 UI can include read-only data points as well as writable configuration settings, setpoints, and parameters.
Changing a Configuration Setting, Setpoint, or Parameter in the LCD2x4 UI To change a configuration setting, setpoint, or parameter:
4. Navigate to the page containing the desired point.
5. Use the Up and Down arrows to display the desired point to change.
6. Press the Enter key to enter the edit mode. The point’s setting/value blinks while in the edit mode.
7. Press the up or down arrow to toggle the entry to the desired setting or value.
8. Press the Enter key to accept the change or the Clear (C) key to reject the change.
44 Hot Water System – Heat Exchanger Application Note
Hot Water System—Heat Exchanger Application Note 45
Supervisor Interface The HWS-HX application template contains predefined mappings between the application points and N2 points, LONWORKS® network variables, and BACnet® objects. After you select the protocol type in the Application Wizard, the corresponding network profile is added to the HWS-HX application file.
The actual network profile depends on which configuration settings were selected in the Application Wizard. The Protocol Documentation and Network Resource Files generated by the Application Wizard provide you with details about the actual network profile. Make sure you select the appropriate options in the Application Wizard Preferences dialog box, or the desired files are not generated.
• If the Generate Protocol Documentation option was selected in the Application Wizard Preferences dialog, then the network documentation is generated at the end of the Application Wizard session.
• If the Generate Network Protocol Files option was selected, then the N2 Print files (*.prn) or LONWORKS network resource files (*.xif, *.typ, *.enu, *.ftp, *.typ) are generated at the end of the Application Wizard session.
Note: BACnet integration does not require resource files.
