LJ Wing AireLogic User manual

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AireLogic
Digital Control System
User Manual
Rev. 04-11-13

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Table of Contents
OVERVIEW ................................................................................................................................. 6
NETWORKING ......................................................................................................................... 8
AIRELOGIC DEFAULT SETTINGS .................................................................................. 8
UNIT OPERATING MODES ................................................................................................ 9
MRT Controls:........................................................................................................................... 9
UNIT OFF MODE...............................................................................................................................................9
UNIT MANUAL MODE...................................................................................................................................10
UNIT AUTO MODE .........................................................................................................................................10
MDT Controls:......................................................................................................................... 10
UNIT OFF MODE.............................................................................................................................................10
UNIT MANUAL MODE...................................................................................................................................10
UNIT AUTO MODE .........................................................................................................................................10
MRT-Expert Controls:............................................................................................................ 10
UNIT OFF MODE.............................................................................................................................................10
UNIT MANUAL MODE...................................................................................................................................11
UNIT AUTO MODE .........................................................................................................................................11
Scheduling Time Clock.......................................................................................................................................11
Heating Night Setback .......................................................................................................................................14
Cooling Night Setback .......................................................................................................................................14
Auxiliary Unit Enable ........................................................................................................................................14
MDT-Expert Controls:............................................................................................................ 15
UNIT OFF MODE.............................................................................................................................................15
UNIT MANUAL MODE...................................................................................................................................15
UNIT AUTO MODE .........................................................................................................................................15
Scheduling Time Clock.......................................................................................................................................15
Auxiliary Unit Enable ........................................................................................................................................18
Heating/Ventilating/Cooling Operating Modes .................................................... 19
Heating Mode.......................................................................................................................... 19
General Burner Control......................................................................................................................................19
Recirculating Direct-Fired Heaters...................................................................................................................20
Energy Savings Mode 1 Mixing Box Recirculating Units..............................................................................21
Energy Savings Mode 1 Non-Recirculating Units..........................................................................................21
Energy Savings Mode 2 Mixing Box Recirculating Direct-Fired Units.........................................................21
Energy Savings Mode 3 .....................................................................................................................................21
Ventilation Mode..................................................................................................................... 21
Cooling Mode.......................................................................................................................... 24
General Cooling Control....................................................................................................................................24
Energy Savings Mode 4 .....................................................................................................................................24
Damper Control Modes ..................................................................................................... 25
Manual Mode.......................................................................................................................... 25
MRT and MDT Controls....................................................................................................................................25
MRT-Expert and MDT-Expert Controls............................................................................................................25

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Mixed Air Temperature Mode............................................................................................... 26
MRT Control……..............................................................................................................................................26
MRT-Expert Control..........................................................................................................................................26
MDT and MDT-Expert Controls........................................................................................................................26
Building Pressure Mode........................................................................................................ 26
MRT and MDT Controls....................................................................................................................................26
MRT-Expert and MDT-Expert Controls............................................................................................................26
100% Outside Air ................................................................................................................. 27
Minimum Ventilation ......................................................................................................... 27
Freezestat ............................................................................................................................... 27
Clogged Filter ........................................................................................................................ 27
User Configured PID Control ......................................................................................... 27
Direct Acting............................................................................................................................ 28
Reverse Acting ....................................................................................................................... 29
Unit Resets ............................................................................................................................. 31
ALARM..................................................................................................................................... 31
CALIBRATE............................................................................................................................ 32
FAN COUNT........................................................................................................................... 32
HEATING COUNT ................................................................................................................. 32
COOLING COUNT................................................................................................................. 33
Multiplexed Inputs .............................................................................................................. 33
Clock Set ................................................................................................................................. 34
Diagnostics –Critical Alarm Codes ........................................................................... 34
ALARM CODE: Low Discharge Temperature................................................................. 34
SOLUTION: If burner was operating prior to shutdown (check prior alarm log) .....................................34
SOLUTION: If burner was not operating prior to shutdown (check prior alarm log) ...............................35
ALARM CODE: Safety Circuit Open................................................................................. 37
SOLUTION: If fan is not running (check prior alarm log) ........................................................................37
SOLUTION: If fan is running (check prior alarm log)..............................................................................37
ALARM CODE: Burner Status........................................................................................... 38
SOLUTION: Inspect burner control circuit and burner ............................................................................38
ALARM CODE: Burner Hand............................................................................................. 39
SOLUTION: Inspect burner control circuit. This alarm has the potential to be a very serious problem.
Close the manual gas valves immediately if the fan is not running. ..................................................................39
ALARM CODE: Flame Failure........................................................................................... 40
SOLUTION: Investigate flame relay........................................................................................................40

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Diagnostics –Non-Critical Alarm Codes ................................................................. 40
ALARM CODE: Unit off/Fan on......................................................................................... 40
SOLUTION: If fan is running...................................................................................................................40
SOLUTION: If fan is not running.............................................................................................................41
ALARM CODE: Unit on/Fan off......................................................................................... 41
SOLUTION: If fan/motor is running ........................................................................................................41
SOLUTION: If fan/motor is not running ..................................................................................................41
ALARM CODE: Check Airflow Switches.......................................................................... 42
SOLUTION: If high airflow switch is opening. Do not adjust the switch setpoints..................................42
SOLUTION: If low airflow switch is opening. Do not adjust the switch setpoints...................................42
ALARM CODE: Clogged Filter Switch ............................................................................. 43
SOLUTION: If clogged filter switch is closing. ........................................................................................43
ALARM CODE: Insufficient OA......................................................................................... 44
SOLUTION: If heat is desired ...................................................................................................................44
SOLUTION: If less outside air is desired ..................................................................................................45
ALARM CODE: Invalid Damper Control Mode............................................................... 45
SOLUTION: If the unit is configured for MRT or MRT-Expert controls ................................................45
SOLUTION: If the unit is configured for MDT or MDT-Expert controls................................................45
ALARM CODE: Room Sensor Failure ............................................................................. 45
SOLUTION: Investigate room sensor.......................................................................................................45
Glossary ................................................................................................................................... 46
Menu Selection Tree for BACview ............................................................................. 47
MODSTAT............................................................................................................................... 48
UNIT MODES HOTKEY - 2 ............................................................................................... 48
SETPOINTS HOTKEY - 3................................................................................................ 49
STATUS MENU HOTKEY - 4............................................................................................ 49
ALARM HOTKEY - 1........................................................................................................ 50
RESETS HOTKEY - 6........................................................................................................ 50
SCHEDULES HOTKEY - 7................................................................................................ 50
CLOCKSET HOTKEY - 0................................................................................................ 51
HELP HOTKEY - 5............................................................................................................ 51
USER CONFIGURABLE OUTPUT HOTKEY - 8........................................................... 52
Appendix I ............................................................................................................................... 53
10KΩ Thermistor Output Curve ........................................................................................... 53
Appendix II .............................................................................................................................. 54
Airflow Station Layout............................................................................................................ 54
Appendix III ............................................................................................................................ 55
I/O Zone 583 Controller Specifications............................................................................... 55

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Appendix IV ............................................................................................................................ 56
I/O Zone 583 Controller Battery Checkout......................................................................... 56
Appendix V .............................................................................................................................. 57
Control System Field Conversion........................................................................................ 57
Typical Wiring Schematic ............................................................................................... 59
RECIRCULATING WDF MODEL DIAGRAM..................................................................... 59
NON-RECIRCULATING WDF MODEL DIAGRAM.......................................................... 60

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OVERVIEW
A glossary has been provided to assist the reader in understanding distinctive terms and
phrases. These terms and phrases appear in italics.
LJ Wing’s Digital Control System, AireLogic, is designed to give the user the ultimate in
unit performance and operational flexibility, adaptability, and reliability in a user-friendly
package. The AireLogic DDC system is a standard component on LJ Wing heating and
cooling units. Because the AireLogic system encompasses a wide variety of unit
types, not all of the system’s capabilities and functions are relevant to all units.
Where a function is similar but different between recirculating and non-recirculating
units or direct fired or indirect fired units, the function is explained separately.
AireLogic accepts single or multiple units on the system network. Each unit can be
provided with a BACview. The BACview connects to the unit control module via the
Local Access Port (see Figure 1 for the location of the Local Access Port). The operating
parameters for individual units may be input through the BACview. A PC may also be
connected to the network. This allows the user to configure each unit separately, or all
units can be configured simultaneously. A controls contractor can provide assistance in
networking.
Figure 1
The BACview ships with a cable. One end of the cable consists of a pre-wired black
screw terminal connector while the other end consists of a 5-pin red-tipped plug.
For MRT and MRT-Expert systems, plug the pre-wired black screw terminal connector
into the back of the BACview and plug the 5-pin red-tipped plug into the bottom of the
room sensor. Because the room sensor is hard-wired to the controller via the Rnet port on
the left-hand side of the controller and the BACview is connected to the room sensor via
the plug connection on the bottom of the room sensor, this creates a communications link
between the BACview and the controller without having to directly wire the BACview to
the controller.

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It is easy to move the BACview between the location of the room sensor in the space and
the unit’s location without having to do any additional wiring. Simply unplug the
BACview from the bottom of the room sensor in the space and take it to where the unit is
located. Then, plug the BACview into the Local Access Port on the controller as shown in
Figure 1. To go from where the unit is located to the room sensor in the space, unplug the
BACview from the Local Access Port and take it to the room sensor. Then, plug the
BACview into the bottom of the room sensor.
For MDT and MDT-Expert systems, simply plug the BACview into the Local Access Port
on the controller as shown in Figure 1 as a room sensor is not provided with these
systems.
If there are multiple units at the jobsite, the BACview can easily be unplugged from one
unit and plugged into another. For this reason, it is not recommended to hardwire the
BACview into the Rnet port on the left-hand side of the controller because it sacrifices the
convenience of portability.
LJ Wing’s AireLogic system also includes operational modes such as time scheduling,
filter monitoring, and multiple damper control and temperature control schemes. All of
these modes provide the maximum in unit operational flexibility.
The optional airflow station imparts unparalleled adaptability into the operation of each
unit. A daily self-calibration enables AireLogic to detect the exact ratio of outside and
return air entering the unit. Then AireLogic daily fine-tunes the unit’s operation based on
these new parameters. Air volume can vary because of changes in static pressure
conditions due to loading filters, VAV boxes, and building dynamics. These varying
conditions influence the ventilation air provided by the unit. On certain models of
recirculating direct-fired heaters this impacts the allowable equivalent temperature rise of
the unit that is allowed under the latest ANSI standard for direct-fired heaters.
AireLogic diagnostic capabilities insure swift response to abnormal unit conditions. An
alarm is generated anytime a discrepancy exists between operational parameters and
actual unit operation. An alarm indication is displayed at the BACview and system PC in
text format. In the Diagnostics section of this manual is a list of all alarms and possible
causes and solutions.
All of the features of the AireLogic system are designed to provide the user with real time
information. At any time the user can display all of the operational parameters, make
changes, if necessary, and observe the various temperature, pressure, and damper
readings. The system’s diagnostic capabilities provide the user with up to the minute
status reporting. (BACview remote keypad or WebCTRL internet connection is required
for these features.)

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NETWORKING
AireLogic is adaptable to a variety of different network architectures and protocols. Each
controller has built-in protocol translation and can be configured for operation on
ARCnet156 or EIA-485 communication networks. See Appendix III for specific
controller specifications.
The AireLogic system can be connected to most existing building automation systems.
Some systems may require the use of special controllers and network communication
devices.
AIRELOGIC DEFAULT SETTINGS
The following is a list of AireLogic DDC controller defaults. These are the default
operating parameters set at the factory prior to shipment.
ITEM
DEFAULT
RANGE
Unit Network Address
varies
000 –100 rotary switches
Unit Operating Mode
Off
Auto –Off –Manual
Control System
As specified
MRT (modulating room
temperature control) –MDT
(modulating discharge
temperature control)
Time Clock Schedule
None
4 Daily - 12 Holiday - 2
Override schedules
Damper Operating Mode
As specified
Manual –Building Pressure –
Mixed Air Temperature
Fuel Selection
As specified
Natural –Propane
Heating Unoccupied Setpoint
55°F
40°F - 130°F
Cooling Unoccupied Setpoint
100°F
40°F - 130°F
Remote Temperature Setpoint
OFF
55°F - 90°F
Heating Occupied Setpoint
65°F
40°F - 130°F
Cooling Occupied Setpoint
73°F
40°F - 130°F
Outside Temperature for
Heating/Cooling Changeover
Setpoint (MDT-Expert Control)
55°F
40°F - 130°F
Freezestat
45°F
35°F - 80°F
Heating Economizer Setpoint
65°F
40°F - 130°F
Cooling Economizer Setpoint
55°F
40°F - 130°F
Minimum Heating Discharge
Temperature Setpoint
55°F
40°F - 130°F
Maximum Heating Discharge
Temperature Setpoint
100°F
40°F - 130°F
Minimum Cooling Discharge
Temperature Setpoint
55°F
40°F - 130°F
Maximum Cooling Discharge
Temperature Setpoint
75°F
40°F - 130°F
Heating Discharge Setpoint
(MDT-Expert Control)
65°F
40°F - 130°F

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ITEM
DEFAULT
RANGE
Cooling Discharge Setpoint
(MDT-Expert Control)
73°F
40°F - 130°F
Remote Damper Position Setpoint
0% Outside Air
0% - 100%
Mixed Air Temperature Setpoint
50°F
30°F - 90°F
Building Pressure Setpoint
0.00” W. C.
-0.10” - +0.10” W. C.
Manual Damper Position Setpoint
20% Outside Air
0% - 100%
Minimum Ventilation Setpoint
20% Outside Air
0% - 100%
Manual Damper Position Setpoint
(75/25 direct fired heaters)
25% Outside Air
25% - 100%
Minimum Ventilation Setpoint
(75/25 direct fired heaters)
25% Outside Air
25% - 100%
Unit Model
As specified
IFL20-IFL40-IFL60-OTHER
User PID Select
Direct Acting
DIRECT –REVERSE
High Input Value
0.00
-9999.99 –99999.99
Low Input Value
0.00
-9999.99 –99999.99
User Control Setpoint
0.00
-9999.99 –99999.99
Maximum User Setpoint
0.00
-9999.99 –99999.99
Minimum User Setpoint
0.00
-9999.99 –99999.99
UNIT OPERATING MODES
There are three different modes that control the supply fan and unit operation:
Off
Manual
Auto
There are also four different methods for controlling the operating modes:
a remote control panel with one or two rotating adjustment knobs (MRT and
MDT controls)
an intelligent room sensor and BACview panel with LCD display (MRT-Expert
controls)
an BACview panel with LCD display (MDT-Expert controls)
any of the these controls with an internet-based WebCTRL interface or other 3rd
party building automation system
MRT Controls:
Modulating room temperature (MRT) control is the most basic AireLogic control for
room temperature. The MRT control system includes a remote control panel equipped
with 1 or 2 potentiometers, 3 or more pilot lights, and up to 2 switches.
AireLogic units configured for MRT or MRT-Expert controls will have a fixed
discharge temperature of 70°F if the room temperature sensor is disconnected or
otherwise fails to communicate with the unit control module.
UNIT OFF MODE
Off Mode is the default unit operational mode. To place the unit in Off Mode, rotate the
“temperature setpoint” knob on the remote control panel counterclockwise to the stop.
This will place the unit in the OFF mode and extinguish the “fan on” light. The OFF
mode prevents the unit from starting.

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UNIT MANUAL MODE
Manual Mode allows the unit to turn on. To place the unit in Manual Mode, rotate the
“temperature setpoint” knob on the remote control panel clockwise to the desired room
temperature setpoint. This will place the unit in the MANUAL mode and enable the fan
and burner. See Heating/Ventilating/Cooling Modes and Energy Saving Modes of this
manual for more information.
UNIT AUTO MODE
The MRT control does not support the time clock, night setback, or auxiliary unit
enable functions.
MDT Controls:
Modulating discharge temperature (MDT) control is the most basic AireLogic control for
discharge temperature. The MDT control system includes a remote control panel
equipped with 1 or 2 potentiometers, 3 or more pilot lights, and up to 2 switches.
UNIT OFF MODE
Off Mode is the default unit operational mode. To place the unit in the Off Mode, rotate
the “temperature setpoint” knob on the remote control panel counterclockwise to the
stop. This will place the unit in the OFF mode and extinguish the “fan on” light. The OFF
mode prevents the unit from starting.
UNIT MANUAL MODE
Manual Mode allows the unit to turn on. To place the unit in the Manual Mode, rotate the
“temperature setpoint” knob on the remote control panel clockwise to the desired
discharge air temperature setpoint. This will place the unit in the MANUAL mode and
enable the fan and burner. See Heating/Ventilating/Cooling Modes and Energy Saving
Modes of this manual for more information.
UNIT AUTO MODE
The MDT control does not support the time clock, night setback, or auxiliary unit
enable functions.
MRT-Expert Controls:
The AireLogic MRT-Expert (modulating room temperature) control system provides full
information regarding unit operation and allows the user to adjust all operational
parameters using the BACview panel. See the Menu Selection Tree for BACview section
of this manual for more information about navigating the BACview menus.
AireLogic units configured for MRT or MRT-Expert controls will have a fixed
discharge temperature of 70°F if the room temperature sensor is disconnected or
otherwise fails to communicate with the unit control module.
UNIT OFF MODE
Off Mode is the default unit operational mode. To place the unit in Off Mode, scroll
through the Unit Modes menu tree, locate the AUTO/OFF/MANUAL branch, and select
OFF. This will place the unit in the OFF mode. The OFF mode prevents the fan and
burner from starting. This mode will override the Time Clock and Night Setback
functions.

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UNIT MANUAL MODE
Manual Mode allows the supply fan to turn on regardless of the Time Clock or Night
Setback functions. Heating and cooling functions use the Occupied Setpoints. To place
the unit in Manual Mode, scroll through the Unit Modes menu tree, locate the
AUTO/OFF/MANUAL branch, and select MANUAL. This will place the unit in the
MANUAL mode.
UNIT AUTO MODE
Auto Mode has four different functions that control the supply fan and unit operation.
They are a time clock function, heating and cooling night setbacks, and a signal from an
external source to an auxiliary digital input. To place the unit in Auto Mode, scroll
through the Unit Modes menu tree, locate the AUTO/OFF/MAN branch, and select
AUTO. This will place the unit in the AUTO mode. This activates the four Auto mode
functions.
Scheduling Time Clock
The primary Auto Mode function is the Time Clock Schedule. The Time Clock function
allows the user to schedule the unit’s occupied and unoccupied periods. There are four
different schedules available: 24 hour continuous operation, daily, holiday, and override.
The daily schedule can be programmed for up to 4 separate On/Off events with any
combination of days. The daily schedule sets the typical Occupied/Unoccupied times for
the unit. The holiday schedule can be programmed for up to 12 separate
Occupied/Unoccupied events with any combination of days. The holiday schedule sets
the Unoccupied times for holidays and other shutdown periods. The override schedule
can be programmed for up to 2 separate Occupied/Unoccupied events with any
combination of days. The override schedule sets the Occupied times that will override the
holiday schedule. This scheduling system allows the user to program a diverse array of
Occupied/Unoccupied operations. The AireLogic DDC system has no preset
Occupied/Unoccupied schedule.
To set the Occupied/Unoccupied times of the unit scroll through the SCHEDULES menu
tree, and locate the desired Daily, Holiday, or Override branch. Enter the days and times
for the unit to run in Occupied mode. In the Daily or Override section these times should
correspond to the desired Occupied times for the unit’s operation. In the Holiday section
these times should correspond to the desired Unoccupied times for the unit’s operation.
For any schedule to function the Use tab must be set to yes.
To set the time clock function for 24 hour continuous operation, scroll through the
menu tree and locate the SCHEDULES page. Set the 24 Hr Operation to yes. Enter the
Daily section of the menu and set the Use tab to yes. Finally select the days for 24 hour
operation. The unit uses the Occupied setpoints in 24 hour continuous operation mode.
See the CLOCK SET section of this manual for setting the time, date and Daylight
Savings function.
The following instructions demonstrate how to set up a sample schedule using the
BACview remote. An example of a typical schedule would be to have the unit Occupied
Monday through Friday from 6:00 AM to 5:00 PM, except during the week of
Thanksgiving when the units will be Unoccupied. However they will be Occupied each
weekday during Thanksgiving week from 8:00 AM until noon while a maintenance crew

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is in the building. The maintenance crew will come in at 5:00 AM on Friday to complete
preliminary tasks in preparation for the week. We will use this sample schedule as our
guide in programming the sample schedule. Refer to the Menu Selection Tree for
BACview section of this manual for more information about the BACview buttons,
hotkeys, and menus.
The sample schedule and instructions below are just a guide; you may skip the rest of the
Scheduling Time Clock section of this manual if you are already comfortable
programming daily, holiday, and override schedules. Simply determine when you want
the unit to operate on the Occupied and Unoccupied setpoints and set the schedule in the
BACview accordingly.
1. Use the FN + 7 hotkey to jump directly to the Schedules screen of the menu tree.
While holding the FN key, press the 7key, and the Schedules screen will appear.
The BACview may prompt you for the User password. The default password is
0000.
2. Navigate to the Daily field and press the Enter button. The screen will show a
blank daily schedule.
3. To enable the Daily schedule, set the Use field to Yes. The Stat field indicates
whether the schedule on that screen is currently active, so you may see either ON
or OFF in this field. Navigate to the Start Time field and set the start time for
6:00 AM. Be aware that times are programmed in a 24 hour format. For example,
2:00 PM would be programmed as 14:00, which will show up on the BACview
screen as “14 : 0”.
4. Navigate to the Stop Time field and set the stop time for 5:00 PM (17:00 in the
24 hour format).

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5. Navigate to the Days fields, making sure the cursor surrounds the first hyphen ( [
- ] ). Press the Enter button and then press the link key that corresponds to
INCR on the screen. The field will now show MON, indicating that this schedule
will be active every Monday from 6:00 AM to 5:00 PM. Repeat this process for
each of the remaining Days fields, except for SAT and SUN. Your screen should
now look like this:
6. The week of Thanksgiving for 2012 is from Sunday, November 18th to Saturday,
November 24th. We want the unit to operate in Occupied mode each weekday
from 8:00 AM to 12:00 PM while the maintenance crew is in the building during
that week. We will need to set up a few Holiday schedules to accomplish this.
Since the unit normally runs in the Occupied mode from 6:00 AM to 5:00 PM on
weekdays, we need to set the Unoccupied periods in the Holiday schedules. The
Unoccupied period we want to schedule then is from 6:00 AM to 8:00 AM and
12:00 PM to 5:00 PM. We will use 10 Holiday schedules to accomplish this (two
for each weekday).
7. Navigate back to the Schedules screen using the FN + 7 hotkey. Move the cursor
to select the Holiday field and press Enter. Set the start time to 6:00 AM and the
stop time to 8:00 AM. Remember, the Holiday schedules represent the period
during which the unit is to be Unoccupied. Set the Month field to 11 (November)
and the Day field to 19 (Monday, the first weekday that week). Your screen
should now look like this:
8. Press the link key corresponding to the Next field on the screen. This will take
you to Holiday Schedule 2. Set the start time for Holiday Schedule 2 to 12:00 PM
and the stop time to 5:00 PM. Set the Month field to 11 (November) and the Day
field to 19 (Monday, the first weekday that week). Your screen should now look
like this:
Repeat this step for the 20th, 21st, 22nd, and 23rd (Tuesday, Wednesday, Thursday,

14
and Friday) using Holiday Schedules 3 through 10, then proceed to the next step.
9. Since the maintenance crew will be in the building at 5:00 AM on Monday, we
will need an override schedule to override part of the Holiday schedule we just
created. Navigate back to the Schedules screen using the FN + 7 hotkey. Move
the cursor to select the Override field and press Enter. Set the start time to 5:00
AM and the stop time to 8:00 AM. Remember, the Override schedules override
the Holiday schedules and represent the period during which the unit is to be
Occupied. Set the Month field to 11 (November) and the Day field to 19
(Monday, the first weekday of Thanksgiving week in 2012). Your screen should
now look like this:
10. Press the link key corresponding to the Home field on the screen to return to the
Home screen. The sample schedule is programmed and the units will
automatically switch between Occupied and Unoccupied modes based on the
daily, holiday, and override schedules.
Heating Night Setback
The Heating Night Setback function automatically cycles the unit “on” if the room
temperature falls below the Heating Setback temperature setpoint, and the unit is
scheduled to be “off”. If the unit is scheduled to be “off” and the Heating Setback
function turns the unit “on”, the unit will be cycled “off” once the room air temperature
has risen 2° above the Heating Setback setpoint. The default for this setpoint is 55°F. To
change the Heating Setback setpoint scroll through the SETPOINTS menu tree, locate the
Heating Setback setpoint and enter a new temperature. The allowable temperature range
is 40°F - 130°F.
Cooling Night Setback
The Cooling Night Setback function automatically cycles the unit “on” if the room
temperature rises above the Cooling Setback temperature setpoint and the unit is
scheduled to be “off”. If the unit is scheduled to be “off” and the Cooling Setback
function turns the unit “on”, the unit will be cycled off once the room air temperature has
fallen 2° below the Cooling Setback setpoint. This function toggles digital output DO1.
The default for this setpoint is 100°F. To change the Cooling Setback setpoint scroll
through the SETPOINTS menu tree, locate the Cooling Setback setpoint and enter a new
temperature. The allowable temperature range is 40°F - 130°F.
Auxiliary Unit Enable
The Auxiliary Unit Enable function overrides all other Auto Mode functions and
automatically cycles the unit into operation. This function is activated whenever a contact
is closed between the appropriate terminals on the unit’s terminal strip located in the
unit’s main control panel. Heating and cooling functions use the Night Setback Setpoints.
See the Typical Wiring Schematic and Multiplexed Input sections of this manual for
more information. This function can be used with a twist timer, toggle switch, door

15
switch, exhaust fan interlock, or any other dry contact to override the time clock
schedule.
MDT-Expert Controls:
The AireLogic MDT-Expert (modulating discharge temperature) control system provides
full information regarding unit operation and allows the user to adjust all operational
parameters using the BACview panel. See the Menu Selection Tree for BACview section
of this manual for more information about navigating the BACview menus.
UNIT OFF MODE
Off Mode is the default unit operational mode. To place the unit in Off Mode scroll
through the Unit Modes menu tree, locate the AUTO/OFF/MANUAL branch, and select
OFF. This will place the unit in the OFF mode. The OFF mode prevents the fan and
burner from starting. This mode will override the Time Clock function.
UNIT MANUAL MODE
Manual Mode allows the supply fan to turn on regardless of the Time Clock function. To
place the unit in Manual Mode scroll through the Unit Modes menu tree, locate the
AUTO/OFF/MANUAL branch, and select MANUAL. This will place the unit in the
MANUAL mode.
UNIT AUTO MODE
Auto Mode has two different functions that control the supply fan and unit operation.
They are a time clock function and a signal from an external source to an auxiliary digital
input. To place the unit in Auto Mode scroll through the Unit Modes menu tree, locate
the AUTO/OFF/MAN branch, and select AUTO. This will place the unit in the AUTO
mode. This activates the four Auto mode functions.
Scheduling Time Clock
The MDT-EXPERT control does not support the night setback functions.
The primary Auto Mode function is the Time Clock Schedule. The Time Clock function
allows the user to schedule the operational times of the unit. There are four different
schedules available: 24 hour continuous operation, daily, holiday, and override. The daily
schedule can be programmed for up to 4 separate On/Off events with any combination of
days. The daily schedule sets the typical operational times for the unit. The holiday
schedule can be programmed for up to 12 separate On/Off events with any combination
of days. The holiday schedule sets the Off times for holidays and other shutdown periods.
The override schedule can be programmed for up to 2 separate On/Off events with any
combination of days. The override schedule sets the On times that will override the
holiday schedule. This scheduling system allows the user to program a diverse array of
On/Off operations. The AireLogic DDC system has no preset On/Off schedule.
To set the On/Off times of the unit scroll through the SCHEDULES menu tree, and locate
the desired Daily, Holiday, or Override branch. Enter the days and times based on the
desired schedule. In the Daily or Override section these times should correspond to the
desired On times for the unit’s operation. In the Holiday section these times should
correspond to the desired Off times for the unit’s operation. For any schedule to
function the Use tab must be set to yes.

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To set the time clock function for 24 hour continuous operation, scroll through the
menu tree and locate the SCHEDULES page. Set the 24 Hr Operation to yes. Enter the
Daily section of the menu and set the Use tab to yes. Finally select the days for 24 hour
operation.
See the CLOCK SET section of this manual for setting the time, date and Daylight
Savings function.
The following instructions demonstrate how to set up a sample schedule using the
BACview remote. An example of a typical schedule would be to have the unit On
Monday through Friday from 6:00 AM to 5:00 PM, except during the week of
Thanksgiving when the units will be Off. However they will be On each weekday during
Thanksgiving week from 8:00 AM until noon while a maintenance crew is in the
building. The maintenance crew will come in at 5:00 AM on Friday to complete
preliminary tasks in preparation for the week. We will use this sample schedule as our
guide in programming the sample schedule. Refer to the Menu Selection Tree for
BACview section of this manual for more information about the BACview buttons,
hotkeys, and menus.
The sample schedule and instructions below are just a guide; you may skip the rest of the
Scheduling Time Clock section of this manual if you are already comfortable
programming daily, holiday, and override schedules. Simply determine when you want
the unit to operate on the Occupied and Unoccupied setpoints and set the schedule in the
BACview accordingly.
1. Use the FN + 7 hotkey to jump directly to the Schedules screen of the menu tree.
While holding the FN key, press the 7key, and the Schedules screen will appear.
The BACview may prompt you for the User password. The default password is
0000.
2. Navigate to the Daily field and press the Enter button. The screen will show a
blank daily schedule.

17
3. To enable the Daily schedule, set the Use field to Yes. The Stat field indicates
whether the schedule on that screen is currently active, so you may see either ON
or OFF in this field. Navigate to the Start Time field and set the start time for
6:00 AM. Be aware that times are programmed in a 24 hour format. For example,
2:00 PM would be programmed as 14:00, which will show up on the BACview
screen as “14 : 0”.
4. Navigate to the Stop Time field and set the stop time for 5:00 PM (17:00 in the
24 hour format).
5. Navigate to the Days fields, making sure the cursor surrounds the first hyphen ( [
- ] ). Press the Enter button and then press the link key that corresponds to
INCR on the screen. The field will now show MON, indicating that this schedule
will be active every Monday from 6:00 AM to 5:00 PM. Repeat this process for
each of the remaining Days fields, except for SAT and SUN. Your screen should
now look like this:
6. The week of Thanksgiving for 2012 is from Sunday, November 18th to Saturday,
November 24th. We want the unit to be On each weekday from 8:00 AM to 12:00
PM while the maintenance crew is in the building during that week. We will need
to set up a few Holiday schedules to accomplish this. Since the unit is normally
On from 6:00 AM to 5:00 PM on weekdays, we need to set the Off periods in the
Holiday schedules. The Off period we want to schedule then is from 6:00 AM to
8:00 AM and 12:00 PM to 5:00 PM. We will use 10 Holiday schedules to
accomplish this (two for each weekday).
7. Navigate back to the Schedules screen using the FN + 7 hotkey. Move the cursor
to select the Holiday field and press Enter. Set the start time to 6:00 AM and the
stop time to 8:00 AM. Remember, the Holiday schedules represent the period
during which the unit is to be Off. Set the Month field to 11 (November) and the
Day field to 19 (Monday, the first weekday that week). Your screen should now
look like this:

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8. Press the link key corresponding to the Next field on the screen. This will take
you to Holiday Schedule 2. Set the start time for Holiday Schedule 2 to 12:00 PM
and the stop time to 5:00 PM. Set the Month field to 11 (November) and the Day
field to 19 (Monday, the first weekday that week). Your screen should now look
like this:
Repeat this step for the 20th, 21st, 22nd, and 23rd (Tuesday, Wednesday, Thursday,
and Friday) using Holiday Schedules 3 through 10, then proceed to the next step.
9. Since the maintenance crew will be in the building at 5:00 AM on Monday, we
will need an override schedule to override part of the Holiday schedule we just
created. Navigate back to the Schedules screen using the FN + 7 hotkey. Move
the cursor to select the Override field and press Enter. Set the start time to 5:00
AM and the stop time to 8:00 AM. Remember, the Override schedules override
the Holiday schedules and represent the period during which the unit is to be On.
Set the Month field to 11 (November) and the Day field to 19 (Monday, the first
weekday of Thanksgiving week in 2012). Your screen should now look like this:
10. Press the link key corresponding to the Home field on the screen to return to the
Home screen. The sample schedule is programmed and the units will
automatically switch between On and Off modes based on the daily, holiday, and
override schedules.
Auxiliary Unit Enable
The Auxiliary Unit Enable function overrides the time clock function and automatically
cycles the unit into operation. This function is activated whenever a contact is closed
between the appropriate terminals on the unit’s terminal strip located in the unit’s main
control panel. See the Typical Wiring Schematic and Multiplexed Input sections of this
manual for more information. This function can be used with a twist timer, toggle switch,
door switch, exhaust fan interlock, or any other dry contact to override the time clock
schedule.

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Heating/Ventilating/Cooling Operating
Modes
The AireLogic DDC controller automatically switches between the heating, ventilating
and cooling modes of operation. The previous sections described the Heating and
Cooling Setback operation. This section concentrates primarily on the Occupied
operating modes. Figures 1 and 2 provide a pictorial representation of the slight
differences between the occupied and unoccupied periods.
Heating Mode
Depending on the control type, the Occupied Heating Mode allows the burner to operate
as needed and is activated whenever the room or outside air temperature is 2°F below the
heating setpoint. During the Unoccupied Heating Mode, the burner is activated whenever
the room or outside air temperature is at the heating setpoint and is deactivated 2°F above
the heating setpoint.
MDT and MDT-Expert control systems do not require a room sensor. As such, one
is not provided for units that ship from the factory configured for either of these
control systems.
General Burner Control
In the Heating Mode the burner will modulate to maintain a constant temperature.
To change the desired heating discharge or room temperature of an MDT or MRT control
system, rotate the temperature setpoint knob on the remote control panel clockwise to the
desired temperature. The allowable temperature range is 55°F - 90°F.
AireLogic units configured for MRT or MRT-Expert controls will have a fixed
discharge temperature of 70°F if the room temperature sensor is disconnected or
otherwise fails to communicate with the unit control module.
To change the desired heating room temperature of an MRT-Expert control system, scroll
through the SETPOINTS menu tree using the BACview, locate the Occupied Heating
Setpoint, and enter a new temperature. The allowable temperature range is 40°F - 130°F.
The burner will modulate using a PID loop to maintain this temperature.
To change the desired heating discharge temperature of a MDT-Expert control system,
scroll through the SETPOINTS menu tree using the BACview, locate the OA for Htg/Clg
Changeover Setpoint, and enter the desired temperature. The allowable temperature range
is 40°F - 130°F. Next scroll through the SETPOINTS menu tree using the BACview,
locate the Discharge Heating Setpoint, and enter a new temperature. The allowable
temperature range is 40°F - 130°F. The burner will modulate using a PID loop to
maintain this temperature.
Additionally, on all controls systems except the MDT and MDT-EXPERT the control
system modulates the burner to maintain the supply air temperature within a defined
operating window. This window defines the maximum and minimum discharge
temperatures.

20
To change the desired minimum supply or discharge air temperature scroll through the
SETPOINTS menu tree, locate the HTG MIN DA Setpoint, and enter a new temperature.
This temperature must not be greater than the HTG MAX DA Setpoint. The allowable
temperature range is 40°F - 130°F. This sets the lowest discharge air temperature that will
leave the unit.
To change the desired maximum supply or discharge air temperature scroll through the
SETPOINTS menu tree, locate the HTG MAX DA Setpoint, and enter a new
temperature. This temperature must not be less than the HTG MIN DA Setpoint. The
allowable temperature range is 40°F - 130°F. This sets the highest discharge air
temperature that will leave the unit.
If the maximum and minimum discharge temperature setpoints are set for the same
temperature, the supply air temperature will be the same as the setpoint regardless of the
room temperature setpoint or actual room temperature.
Recirculating Direct-Fired Heaters
Using different controller software, the AireLogic DDC system can accommodate three
distinct types of recirculating direct-fired units: those that return air before the burner and
employ a special airflow station, those that return air before the burner and do not employ
a special airflow station, and those that recirculate air after the burner. Recirculating
direct-fired units, like all direct-fired units, deliver all of their products of combustion
directly to the heated air space. For this reason it is extremely important that the proper
ventilation rate be maintained to dilute these emissions.
AireLogic units, that recirculate air before the burner and employ an airflow measuring
station, utilize a control scheme that measures air pressure to determine the ratio of
outside air and return air. These units are listed by an independent third party testing
agency and use the equivalent temperature rise control scheme to limit burner
modulation. The AireLogic system accurately measures the ratio of outside and return air,
calculates the allowable equivalent temperature rise and automatically limits the burners
firing rate. This insures the products of combustion, delivered to the space by the unit, are
held at or below allowable OSHA thresholds. The outside air percentage is the driving
parameter for this function. A greater percentage of outside air or dilution air enables the
unit to generate a higher allowable equivalent temperature rise. The maximum allowable
equivalent temperature rise for 20% outside air is 48.9°F. The maximum allowable
equivalent temperature rise increases 1.22°F for each 1% increase in outside air.
AireLogic units, that recirculate air before the burner and do not employ an airflow
measuring station, utilize a control scheme that measures damper position to determine
the percentage of return air. These units are not listed by an independent third party
testing agency but do use the equivalent temperature rise control scheme to limit burner
modulation. The maximum allowable equivalent temperature rise for 20% outside air is
48.9°F. The maximum allowable equivalent temperature rise increases 1.22°F for each
1% increase in outside air.
For AireLogic units that recirculate air before the burner and use the MDT or
MDT-Expert control, the maximum burner firing rate is limited by the discharge
setpoint or the maximum allowable equivalent temperature rise whichever is less.