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Table of Contents
Summary of Contents for AbsolutAire LX-4
- Page 1 LX-4 User Guide © 2020 AbsolutAire, Inc. 072020...
- Page 2 WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operating and maintenance instructions thoroughly before installing or servicing this equipment. Disconnect power supply before making wiring connections or working on this equipment. Follow all applicable safety procedures to prevent accidental power up.
- Page 3 Index A Note About Custom Designs Controller Overview Touch-Screen HMI Layout Main Screen System Status Unit Status Heating Status Cooling Status Maintenance Status Pressure Status Energy Status System Setup Set Points Configuration PID Tuning Energy Configuration Alarms History Charts Schedule Weekly Schedule Special Events Schedule Summary...
- Page 4 A NOTE ABOUT CUSTOM DESIGNS AbsolutAire often builds equipment with special features as requested by the customer. This manual only covers standard features and does not include any changes made for special feature requests by the customer. Touch Screen HMI...
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Page 5: Controller Overview
CONTROLLER OVERVIEW The option features a JENEsys Edge534 programmable controller. Highly advanced with a powerful microprocessor and fast processing speed. Unit Controller • AM335x ARM Cortex A8 processor operating at 1GHz. • 512 MB DDR3L 800 MHz, 4 GB 8-bit Embedded MMC on-board Flash. •... - Page 6 Set points are changed by pressing the desired button, which allows a dialogue box to appear. If the set point is capable of multiple text options, a pull-down menu will be available. If the set point accepts a numeric entry, a pop-up keypad will appear.
- Page 7 OA DAMPER OVERRIDE/VFD OVERRIDE – If the unit is equipped with a VFD this will display ‘VFD OVERRIDE’. If the unit is equipped with mixed air dampers ‘OA DAMPER OVERRIDE’ will be displayed. This option allows you to override the calculated damper position or VFD speed for building pressure control.
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Page 8: Unit Status
Unit Status Screen UNIT STATUS The Unit Status screen displays the overall status of various unit components. This provides an overview of current unit status. FAN STATUS – Displays whether the unit fan is ON or OFF. MODE – Displays the current HEAT/VENT/COOL operating mode of the unit. BUILDING PRESSURE –... -
Page 9: Heating Status
OUTSIDE AIR PERCENT – This is the percentage of outside air on a mixed air unit. RETURN AIR PERCENT – This is the percentage of return air on a mixed air unit. OA CFM – This displays the CFM of outside air for a mixed air unit. DISCHARGE AIR DENSITY –... - Page 10 Maintenance Status Screen TOTAL FAN HOURS – Displays the total number of run time hours on the fan. MAINTENANCE HOURS – Displays the elapsed run time for this maintenance cycle. If the elapsed run time exceeds the pre-set interval the hours will be displayed in ORANGE as a reminder that maintenance is due.
- Page 11 Energy Status Screen ENERGY STATUS The Energy Status screen displays the calculated energy usage of the unit as well as other data to assist with energy usage calculations. ELECTRIC USAGE RATE – Displays the current calculated KW/hr. rate of electric usage. DAILY ELECTRIC USAGE –...
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Page 12: System Setup
SYSTEM SETUP The System Setup screen is partitioned into 4 different sub-menu screens. Press SET POINTS, CONFIGURATION, PID TUNING or ENERGY CONFIGURATION to access the different sub-menu screens. Each sub-menu screen and its options are defined below. System Setup Buttons Set Points Set Points Screen The Set Points screen is used for changing the most often used system set points. - Page 13 Configuration Configuration Screen The Configuration screen is used for setting the main configuration of the unit. These set points are typically not changed often and are used for master control parameters. MINIMUM DISCHARGE TEMPERATURE – This set point defines the minimum temperature of air the unit will be allowed to discharge into the space.
- Page 14 LOW TEMP ALM DELAY TIME – If the unit discharges air below ‘LOW TEMP ALM SET POINT’ degrees for this delay time, the unit will shut itself off to protect the space from cold air. WATCHDOG DELAY – If the unit fails to achieve its calculated discharge temperature within this time period, a watchdog condition is presented on the Alarm Screen.
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Page 15: Energy Configuration
HEATING SPACE DEMAND PID – This PID controls how quickly the unit reacts to changes in space temperature when in heating mode. A setting too slow can cause fluctuations in space temperature. A setting too fast can cause the burner to change temperatures rapidly. HEATING COMMAND PID –... - Page 16 Alarm Screen with Active Alarms On the left is a check box which can be used to select one or more alarms for acknowledgment. Next to the check box is an alarm bell, which will be either red or green. A red alarm bell indicates a system alarm which is currently active. A green alarm bell indicates a system alarm which has been corrected.
- Page 17 When the alarm bell is green, the check box on the left can be selected and the alarm can be cleared from the Alarm Console by pressing ‘ACKNOWLEDGE’ below the list of alarms. The Alarm Console can be viewed at any time by pressing the ‘ALARMS’ button at the bottom of any screen.
- Page 18 � Damper Feedback Alarm. This indicates the 2 – 10 VDC feedback signal from the Outside and Return Air Dampers is not being received by the controller. � Use the electrical diagram to check the mixed air dampers for proper wiring and opera�on. �...
- Page 19 History Chart With Date Historical data available for viewing includes the following. To conserve resources, the system only collects data on several of the points when the unit is operating. Because of this it is possible there will be what appears to be gaps in the data when the unit is not operating.
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Page 20: Weekly Schedule
SCHEDULE The system schedule is a 7-day schedule capable of accepting multiple occupied and unoccupied times. It is also capable of special events or holidays. To access the schedule, press the ‘SCHEDULE’ button on the main screen. Schedule Button A weekly calendar is displayed. At the top are three tabs labeled ‘WEEKLY SCHEDULE’, ‘SPECIAL EVENTS’... -
Page 21: Special Events
If this needs to be a Monday through Friday event, press and hold the center of the scheduled event and select ‘Apply M – F’. Repeat the above steps to add any scheduled events to the weekly calendar, pressing the ‘save’ button when finished. - Page 22 When the event information is entered, press ‘OK’ to save and return to the Special Events main screen. The event is now displayed and a time bar is to the right. Press your finger (or stylus) to the time bar and drag to create the times for the special event.
- Page 23 � For new equipment sales send your email to ‘sales@absolutaire.com’. � For replacement parts and general ques�ons send your email to ‘customerservice@absolutaire.com’. As AbsolutAire, Inc. has a continuous product improvement program, it reserves the right to change design and specifications without notice.
- Page 24 LX-4 TOUCHSCREEN MENU TREE SETUP SCREEN SET POINTS OCCUPIED HEAT SET POINT MENU SCREEN SUB-MENU OPTIONS UNOCCUPIED HEAT SET POINT OCCUPIED COOL SET POINT MAIN SCREEN MAIN ON/OFF COMMAND UNOCCUPIED COOL SET POINT HVAC MODE SELECT BUILDING PRESSURE SET POINT...