AbsolutAire LX-4 User manual

LX-4
© 2020 AbsolutAire, Inc.
User Guide
072020

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. Failure to do so can result in
injury or death from electrical shock or moving
parts and may cause equipment damage.
Improper control adjustments and manual mode
control can cause property damage, injury or
death. Read the installation, operating and
maintenance instructions thoroughly before
making adjustments.
2

Index
Images
A Note About Custom Designs 4
Controller Overview 5
Touch-Screen HMI Layout 5
Main Screen 6
System Status 7
Unit Status 8
Heating Status 9
Cooling Status 9
Maintenance Status 9
Pressure Status 10
Energy Status 11
System Setup 12
Set Points 12
Conguration 13
PID Tuning 14
Energy Conguration 15
Alarms 15
History Charts 18
Schedule 20
Weekly Schedule 20
Special Events 21
Schedule Summary 22
Contact Us 23
Touch-screen HMI 4
Edge534 Controller 4
Six Primary Screen Buttons 5
Types of Main Screens 6
Status Screen Buttons 7
Unit Status Screen 8
Maintenance Status Screen 10
Energy Status Screen 11
System Setup Buttons 12
Set Points Screen 12
Conguration Screen 12
PID Tuning Screen 14
Red Alarm Button 15
Alarm Screen With Active Alarms 16
Alarm Data Display 16
History Screen Icon Menu 18
History Chart Example 19
Schedule Button 20
Weekly Schedule Screen 20
Single Day Event 20
Monday to Friday Event 21
Special Event Screen 21
Create Christmas Event 21
Unoccupied Christmas Holiday 22
Schedule Summary Screen 22
Touchscreen Menu Tree 24
Network Points List 25
3

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
Edge534 Controller
4

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.
• Real Time Clock with battery backup.
• Linux OS with Niagara 4.7.
• 2 RJ-45 10/100 Ethernet ports.
• 2 RS-485 serial ports.
Touch-screen HMI (Human Machine Interface)
• Intel Atom x5-Z8350 processor operating at 1.44 GHz.
• 2 GB DDR3L-160, 32 GB eMMC storage.
• Intel HD 400 graphics.
• 16.7 M colors.
• Android Nougat 7.0 OS.
• 1 RJ-45 10/100/1000 Ethernet port.
• IP65 electrical panel mount rating.
BMS Network Interface
• Modbus TCP/IP standard.
• BACnet IP standard.
• BACnet MS/TP standard.
• Other protocols upon request.
TOUCH-SCREEN HMI MENU LAYOUT
The touch-screen HMI features an easy to read and intuitive display of user set
points, system alarms, historic data and system status information. When viewing
and changing screens, they are viewed as a HTML web page on the HMI. These
screens are individually loaded from a web server the DDC controller. Due to the
nature of HTML graphics it is common for there to be a 3 – 5 second delay
between a button press and a screen load. This is normal operation for this type of
graphics. A soft, deliberate nger-press or a soft tipped stylus works best for
operating the HMI. A hard-tipped stylus, ink pen or other pointed objects should
not be used as they can damage the screen.
Across the bottom of each screen are options to navigate directly to the six
primary screens. These include the MAIN SCREEN, SYSTEM STATUS SCREEN,
SYSTEM SETUP SCREEN, ALARM CONSOLE, HISTORY CHARTS and the CONTACT
US information. The SYSTEM STATUS and SYSTEM SETUP screens have other sub-
menu screens which can then be accessed.
Six Primary Screen Buttons
5

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. Using either the pull-down menu or pop-up keypad enter the desired
value and press ‘OK’. When this is complete the screen will return to normal and
display your entered value.
The HMI features ‘intelligent menus’ so only the options your system is equipped
with will be shown. The following descriptions include all of the available standard
options, some of which may not be included with your equipment conguration.
Main Screen
Mixed Air Unit Main Screen Variable Volume Unit Main Screen
The main screen contains the most commonly used items for control of the Make
Up Air Unit. This is the screen that is initially displayed on power-up. It is
identied by the welcome banner across the top which displays the current date
and time.
ON/OFF COMMAND – This displays the current status of the unit. Pressing
this button will bring up a dialogue box with options to turn the unit ON or OFF.
If the unit is experiencing a Low Discharge Temperature Alarm the text ‘OFF LTL’
will be displayed. To reset a Low Discharge Temperature Alarm, press the button
and select to turn the unit OFF.
MODE – This displays the current operating mode (HEAT/VENT/COOL/
AUTO) of the unit. Pressing this button will bring up a dialogue box with options
to select the operating mode. HEAT is heating or ‘winter’ mode and will allow the
unit to provide heat. VENT is ‘summer’ or ventilation mode. COOL is cooling
mode and will allow the unit to provide conditioned air. AUTO allows the unit to
automatically change between HEAT, VENT and COOL modes as needed by the
space temperature set point.
SCHEDULE – This button brings up the 7-day schedule. Occupied and
unoccupied times can be entered as well as holidays and special events. When
you are nished editing the schedule, return to the main screen by pressing the
‘back arrow’ at the bottom of the screen.
6

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. By
selecting ‘YES’ building pressure control will be overridden and the dampers or
VFD will be locked to the value entered in the option below. Selecting ‘NO’ allows
for automatic damper position or VFD speed and building pressure control. When
selecting ‘YES’ the text is displayed in orange as a reminder you are in override
control.
MANUAL DAMPER/MANUAL VFD SPEED – This displays the current damper
position or VFD speed in black when not in override. Pressing this button will
allow you to enter an override value from 0% to 100%. When in override mode
the override value is displayed in orange text as a reminder.
OCC OVERRIDE – This displays the current occupancy command and
occupancy status. Pressing this button will allow you to select AUTO SCHEDULE,
MAN OCCUPIED or MAN UNOCCUPIED. By selecting ‘AUTO SCHEDULE’ the unit
will follow the occupied and unoccupied times entered in the schedule. By
selecting ‘MAN OCCUPIED’ the unit will ignore the schedule and permanently
assume the occupied status. By selecting ‘MAN UNOCCUPIED’ the system will
ignore the schedule and permanently assume the unoccupied status.
PRESS FOR BURNER RESET – If the unit is experiencing a Burner Lockout
Alarm the text will display ‘BURNER LOCKOUT’ in red. If the burner is operating
normally the text will display ‘NORMAL’ in black. If there is a burner lockout
alarm, press this button to reset the burner and attempt ignition again.
CURRENT SET POINT – This is the current set point the unit is controlling
to. If you are in Space Temperature Control, this is your current occupied or
unoccupied space temperature set point. If you are in Discharge Temperature
Control, this is your current occupied or unoccupied discharge temperature set
point.
SPACE TEMPERATURE/DISCHARGE TEMPERATURE – If you are using Space
Temperature Control, this is the current space temperature as sensed by the
space temperature sensor. If you are using Discharge Temperature Control, this is
the current discharge temperature the unit is providing to the space.
BUILDING PRESSURE – This is the current building pressure, as sensed by
the building pressure transmitter.
System Status
Status Screen Buttons
The System Status screen is partitioned into 6 dierent sub-menu screens. Press
UNIT STATUS, HEATING STATUS, COOLING STATUS, MAINTENANCE STATUS,
PRESSURE STATUS or ENERGY STATUS to access the dierent sub-menu screens.
Each sub-menu screen and its options are dened below.
7

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 – Displays the current building pressure of the
system.
DISCHARGE TEMPERATURE – The current discharge air temperature at the
fan.
OUTSIDE TEMPERATURE – The current outside air temperature at the unit
inlet.
RETURN TEMPERATURE – The current return air temperature at the return
air inlet.
SPACE TEMPERATURE – The current space temperature at the space
temperature sensor.
COOLING COIL TEMPERATURE – The current air temperature on the
discharge side of the cooling coil.
MIXED AIR TEMPERATURE – The calculated mixed air temperature in the
unit. This is a product of outside air temperature, return air temperature
and percentage of outside and return air.
MAX AVAILABLE – Displays the maximum available discharge temperature.
This is a calculated value based on the rules in ANSI Z83.18 for mixed air
units.
VFD SPEED – Displays the current VFD speed percentage.
UNIT CFM – If the unit is equipped with an airow monitoring station this is
the measured discharge airow of the unit. If the unit is not equipped with
an airow monitoring station, the constant value of the design maximum
airow is displayed.
8

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 – This displays the current pounds per cubic foot
(lb/ft³) of the discharge air. This is based on an assumed discharge air dew
point of 40° Fahrenheit.
DISCHARGE AIR VOLUME/LB – This displays the number of cubic feet per
one pound of discharge air. This is based on an assumed discharge air dew
point of 40° Fahrenheit.
HEATING STATUS
The Heating Status screen displays the status of the heating components of the
unit.
CURRENT SET POINT – If the unit is in Discharge Temperature Control, this
is the current discharge temperature set point based on occupancy status.
If the unit is in Space Temperature Control, this is the current space
temperature set point based on occupancy status.
BURNER STATUS – This display indicates if the burner is ON or OFF.
BURNER COMMAND – The command percentage being issued to the burner.
COOLING STATUS
The Cooling Status screen displays the status of the cooling components of the
unit.
CURRENT SET POINT – If the unit is in Discharge Temperature Control, this
is the current discharge temperature set point based on occupancy status.
If the unit is in Space Temperature Control, this is the current space
temperature set point based on occupancy status.
COOLING STATUS – Displays if cooling is currently Enabled or Disabled.
COOLING COMMAND – The command percentage being issued to the
cooling system.
ACTIVE COOLING STAGES – Displays the number of active stages on a
multi-stage DX cooling unit.
MAINTENANCE STATUS
The Maintenance Status screen displays the overall maintenance status of the unit
and includes a ‘RESET’ option for maintenance interval times.
9

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.
MAINTENANCE MESSAGE – Displays the current system maintenance
message. If the unit is still within its scheduled maintenance interval the
message ‘Maintenance Good’ is displayed in black. If the elapsed run time
hours have exceeded the scheduled maintenance interval time the
message ‘Grease Bearings and Check Belts!’ is displayed in ORANGE as a
reminder that routine maintenance is due.
MAINTENANCE RUN TIME RESET – Once routine maintenance has been
completed, press this option to reset the ‘Maintenance Hours’ back to zero.
This will begin a new maintenance interval.
PRESSURE STATUS
The Pressure Status screen displays the readings of the various pressure sensors
on the unit.
BUILDING PRESSURE – Displays the current building pressure of the unit.
INLET FILTER PRESSURE DROP – Displays the pressure drop across the
inlet lters.
PRE FILTER PRESSURE DROP – Displays the pressure drop across the pre-
lters.
FINAL FILTER PRESSURE DROP – Displays the pressure drop across the
nal lters.
10

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 – Displays the calculated electric usage for the
previous day.
DAILY ELECTRIC COST – Displays the calculated electric cost for the
previous day.
GAS USAGE RATE – Displays the current calculated KBTU/hr. rate of gas
usage.
DAILY GAS USAGE – Displays the calculated gas usage for the previous
day.
DAILY GAS COST – Displays the calculated gas cost for the previous day.
AVERAGE OUTSIDE AIR TEMPERATURE – Displays the average outside air
temperature for the previous day.
AVERAGE OUTSIDE AIR PERCENT – Displays the average outside air
percentage for the previous day.
DAILY AVERAGE VFD SPEED – Displays the average daily VFD speed for the
previous day.
HEATING DEGREE DAYS – Displays the number of heating degree days for
the previous day. This is based on the NOAA baseline of 65° Fahrenheit.
COOLING DEGREE DAYS – Displays the number of cooling degree days for
the previous day. This is based on the NOAA baseline of 65° Fahrenheit.
11

SYSTEM SETUP
The System Setup screen is partitioned into 4 dierent sub-menu screens. Press
SET POINTS, CONFIGURATION, PID TUNING or ENERGY CONFIGURATION to
access the dierent sub-menu screens. Each sub-menu screen and its options are
dened below.
System Setup Buttons
Set Points
Set Points Screen
The Set Points screen is used for changing the most often used system set points.
OCCUPIED HEAT – This is the set point used for heating when the unit is
occupied by the schedule or manual selection.
UNOCCUPIED HEAT – This is the set point used for heating when the unit is
unoccupied by the schedule or manual selection.
OCCUPIED COOL – This is the set point used for cooling when the unit is
occupied by the schedule or manual selection.
UNOCCUPIED COOL – This is the set point used for cooling when the unit is
unoccupied by the schedule or manual selection.
BUILDING PRESSURE – This is the set point for control of building pressure.
INLET FILTER PRESSURE DROP – This set point is used to determine a dirty
lter status for the inlet lters.
PRE FILTER PRESSURE DROP – This set point is used to determine a dirty
lter status for the pre-lters.
FINAL FILTER PRESSURE DROP – This set point is used to determine a dirty
lter status for the nal lters.
12

Conguration
Conguration Screen
The Conguration screen is used for setting the main conguration of the unit.
These set points are typically not changed often and are used for master control
parameters.
MINIMUM DISCHARGE TEMPERATURE – This set point denes the minimum
temperature of air the unit will be allowed to discharge into the space.
MAXIMUM DISCHARGE TEMPERATURE – This set point denes the
maximum temperature of air the unit will be allowed to discharge into the
space.
MINIMUM ECON PERCENT/MINIMUM VFD SPEED – For mixed air units, this
is the minimum allowable percentage of outside air. For variable volume
units with a VFD, this is the lowest allowable speed the VFD will operate.
This setting is typically used for air balancing.
MAXIMUM ECON PERCENT/MAXIMUM VFD SPEED – For mixed air units, this
is the maximum allowable percentage of outside air. For variable volume
units with a VFD, this is the highest allowable speed the VFD will operate.
This setting is typically used for air balancing.
HEAT LOCKOUT TEMPERATURE – This temperature determines when heat is
allowed. When the mixed air temperature on mixed air units, or the outside
air temperature on 100% outside air units, is below this set point the
burner will be allowed to light. When the mixed air or outside air
temperature is above this set point, heat is automatically disabled.
COOL LOCKOUT TEMPERATURE – This temperature determines when
cooling is allowed. When the mixed air temperature on mixed air units, or
the outside air temperature on 100% outside air units, is above this set
point cooling is enabled. When the mixed air or outside air temperature is
below this set point, cooling is automatically disabled.
LOW TEMP ALM SET POINT – If the unit discharges air below this set point
for ‘LOW TEMP ALM DELAY TIME’ minutes, the unit will shut itself o to
protect the space from cold air.
13

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 o 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.
MOTOR ALARM DELAY – If the motor fails to return a run status within this
time period, a motor alarm condition is presented on the Alarm Screen.
MAINTENANCE INTERVAL – This set point denes the elapsed run time for
a maintenance interval.
SPACE CONTROL DEADBAND – This is the deadband for space
temperature control and automatic changeover from heating, ventilation
and cooling modes.
CONTROL TYPE – This set point congures the unit for space temperature
control or discharge temperature control. Space temperature control will
control the space to the occupied and unoccupied set points. Discharge
temperature control will control the fan discharge temperature to the
occupied and unoccupied temperature set points.
OA ALARM DELAY TIME – This set point is the delay time for the initiation
of an outside air alarm condition.
OA ALARM DURATION – This set point is the duration for the outside air
alarm condition. After this amount of time expires the unit will attempt
normal operation again.
OA ALARM HORN TIME – This set point determines the length of time the
horn will sound at the initiation of an outside air alarm condition.
PID Tuning
PID Tuning Screen
The PID Tuning screen is used to set how quickly the PID controls respond to
changing conditions. Each PID response is selected via a drop-down menu with
11 choices ranging from ‘Least Aggressive’ to ‘Most Aggressive’. Factory default
is a ‘Neutral’ setting.
14

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 uctuations in space temperature. A setting too fast
can cause the burner to change temperatures rapidly.
HEATING COMMAND PID – This PID controls how quickly the burner reacts
to a demand change from the space. A setting too slow can cause
uctuations in space temperature. A setting too fast can cause the burner
to ‘hunt’ or change temperatures rapidly.
COOLING SPACE DEMAND PID – This PID controls how quickly the unit
reacts to changes in space temperature when in cooling mode. A setting
too slow can cause uctuations in space temperature. A setting too fast
can cause erratic operation of condensing units or rapid uctuations in
cooling valve operation.
COOLING COMMAND PID – This PID controls how quickly the cooling
equipment reacts to a demand change from the space. A setting too slow
can cause uctuations in space temperature. A setting too fast can cause
erratic operation of condensing units or rapid uctuations in cooling valve
operation.
BUILDING PRESSURE PID. – This PID controls how quickly the mixed air
dampers or VFD respond to changes in building pressure. A setting too
slow will cause uctuations in building pressure. A setting too fast will
cause rapid uctuations in damper activity or VFD speed control.
ENERGY CONFIGURATION
The Energy Conguration screen is used to set the cost of electric and gas. These
values are used in the daily energy cost calculations available on the Energy
Status screen. For pricing reference, go to:
https://www.bls.gov/regions/Midwest/data/averageenergyprices_selectedareas_table.html
PRICE PER KILOWATT HOUR – This is the price of electricity per kilowatt
hour.
PRICE PER THERM OF GAS – This is the price of gas per therm.
ALARMS
When a system alarm is present the ‘ALARMS’ button at the bottom of the screen
will change to red. Pressing the ‘ALARMS’ button will display the Alarm Console.
The Alarm Console has several functions and features which are outlined below.
Red Alarm Button
When viewing the alarm console, system alarms are displayed in chronological
order beginning with the oldest alarm at the top. There are various elds for
each alarm.
15

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. Pressing
this alarm bell will display the information regarding this alarm, including the
time and date of the occurrence and its present state.
By expanding the ‘Alarm Data’ tree at the bottom the system displays more
detailed information about the alarm condition, as well as detailed diagnostic
instructions for the alarm.
Alarm Data Display
Pressing ‘FORWARD’ or ‘BACK’ allows you to scroll through the various alarms
while still in the Alarm Details page. Pressing ‘ACKNOWLEDGE’ at the bottom of
the display will acknowledge the alarm. Pressing ‘NOTES’ allows the entry of
custom notes regarding the alarm, such as additional diagnostic procedures
implemented during the troubleshooting process. Pressing ‘CLOSE’ will exit the
Alarm Details page and return to the Alarm Console.
16

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. To exit the Alarm Console, press the back arrow at
the bottom of the screen.
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�   
o            
            
    
�  
o        
�          
�  
o          
          
         
      
�        
�  
o 
o
o 
�      
17

�  
o            
         
�          
   
�  
o            
          
    
�          
�          

�         
        
�          
 
�   
o         
         
�    
�     
�     
�     
�    
�          
          
HISTORY CHARTS
The system collects historical information on a number of data points. These are
available for viewing by pressing the ‘HISTORY’ button at the bottom of the
screen. When the ‘HISTORY’ button is pressed, a blank grid is presented with an
icon menu at the top.
History Icon Menu
Pressing the pull-down menu labeled ‘Today’ allows the selection of a time-frame
for the history chart to view. Select the time-frame you wish to view.
Pressing the ‘+’ sign in the upper left displays a dialogue box. Expand the
‘Histories’ tree, then expand the tree named by the serial number of the unit.
This presents a list of historical data les available for viewing. Select the
historical data you wish to view. The selected historical data will be presented on
the chart. Up to 10 history charts can be displayed at one time.
18

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. Only the options the unit is equipped
with will have captured historical data available.
� 
�   
�  
� 
�  
�  
�    
�   
�   
�  
�   
�   
�   
� 
� 
�  
   
� 
�  
� 
� 
�   
� 
� 
� 
�  
�  
19

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’ and ‘SUMMARY’. The default view when entering
the schedule is the Weekly Schedule.
WEEKLY SCHEDULE
Weekly Schedule Screen
The default status of any unscheduled time is the unoccupied state. To create an
occupied event, gently press your nger (or stylus) to the screen on the day and
time you need the scheduled event to begin then drag down to the end time. The
beginning and ending times of the scheduled event are displayed as well as the
occupied status of the event. To save this event press the ‘disc’ icon in the upper
right corner of the screen.
Single Day Scheduled Event
20