Full Text Searchable PDF User Manual
112018
PC-3
User Guide
© 2018 AbsolutAire, Inc.
1
Table of Contents
Page
Title
2
Preface
3
Introduction
4
Operation
5
Menu Tree
9
Network Integration
Images
3
Figure 1 – Main Screen
2
Preface
The LC-3 Psychrometric Controls Package is a cost-effective system that
will control discharge conditions for installations that need discharge control
of temperature, de-humidification and/or humidification. All calculations are
performed internally so the user only needs to input their desired discharge
conditions. An option for airflow (CFM) monitoring and control is also
available.
For de-humidification the unit will cool the air to the desired dew point, then
heat it to the desired discharge temperature set point. This controls
package will support either a DX unit with an analog signal or a chilled
water valve for cooling. Modulated gas, modulated hot water/steam, or
electric heat sources can be utilized.
If a humidification package with re-heat is added, full control of discharge
conditions can be realized. This can be accomplished with evaporative
media or steam depending on the requirements of the facility with re-heat
being of any type listed above.
Airflow monitoring and control is accomplished by monitoring the air
passing through the fan and controlling a VFD. This allows for automatic
control of air volume with a manual override option for single speed
operation.
Filter monitoring and a full array of alert notifications are also available, all
in a simple to use HMI with a friendly look and feel.
3
Introduction
The Smart-Vue User Interface (UI) for the LC-3 Control System displays
the information necessary to operate and diagnose the Discharge
Temperature and Humidity Control Unit.
Figure 1
At the top left corner of the display there is a bell symbol. This is the system
alarm indicator. If an alarm is present in the unit this indicator will blink. If
no alarm is present this indicator will not be visible. At the top right of the
display is the time in 12-hour format during normal display. When
navigating the menu, the menu title will be displayed here. Across the
center of the display is the data with the units of measure. The system is
capable of displaying up to 4 decimal places. At the bottom left is the fan
status and in the bottom center is the mode of operation.
Three buttons are available for operation (see cover page). The center
button allows you to access the menu and scroll through the menu items.
The up/down buttons are used to change values.
4
Operation
The system has a scrolling display which displays the current Discharge
Temperature, as well as Relative Humidity and Airflow CFM (if equipped
with airflow monitoring and control). The menu is separated into sub-menus
for ease of use, and only the options the unit is equipped with will be
displayed. When navigating the menu blinking items are set points that can
be changed, while non-blinking items are statuses which can only be
viewed.
To turn the unit on or off, press the “up arrow” to access the Fan
Command. Use the “up arrow” to select the desired option, then press the
center button “menu” to return to the main display.
To change set points such as discharge temperature or discharge humidity,
press the “menu” button until you see “SET POINTS” in the top right of the
screen. Press the “up arrow” to enter this sub-menu. Your first choice will
be “TEMP_SET_POINT”. Use the up arrow to select the desired discharge
temperature. When you have made your choice, press the “menu” button to
move to the next menu item, which will be the Discharge Humidity Set
Point. Again, use the “up/down” arrow buttons to make your entry and
press “menu” when finished. Continue scrolling through the Set Points sub-
menu until all of your desired settings are completed. When scrolling the
menu and you see the option “BACK” in the top right, pressing the “up
arrow” will take you to the previous menu.
Scrolling through the “STATUS” sub-menu will allow you to view the status
of all of the unit sensors, cooling, humidity and burner operation. This is
useful for checking unit operation or outdoor conditions.
The “ALARMS” menu will only be displayed if there is a system alarm, as
indicated by the blinking alarm bell on the display. When an alarm is
present, scrolling through this sub-menu will allow you to view the alarm(s)
in “plain English” enumerated text. This is useful for diagnosing the unit in
the event of a problem.
The “CONFIG” menu is where the primary operating set points for the unit
are set such as the minimum and maximum allowable discharge
temperatures, as well as other items. Again, use the “menu” button to scroll
through the sub-menu and the “up/down” buttons to edit your selection.
5
Menu Tree
Scrolling Display
Discharge_Temp
– Current discharge temperature at the unit
discharge (if more than one discharge sensor is used this will be an
averaged value of the sensors).
Discharge_Humidity
– Current discharge humidity at the unit
discharge (if more than one discharge sensor is used this will be an
averaged value of the sensors).
Discharge_Airflow
– If the unit is equipped with airflow monitoring
and control, this will reflect the discharge CFM of the unit (only visible
when airflow monitoring and control is available).
Quick Access
Fan_Command
– This is accessed by pressing the “up arrow” from
the main screen and is used to turn the unit ON and OFF.
Set Points
Temp_Set_Point
– Discharge Temperature Set Point.
Hum_Set_Point
– Discharge Humidity Set Point
CFM_Set_Point
– Discharge Airflow CFM Set Point (only available if
airflow monitoring and control is available).
Manual_VFD_Speed
– Manual VFD Speed Percent Set Point. This
will override the CFM Set Point (above) and force the VFD to run at a
constant, pre-set speed. For automatic control enter ‘null’ value.
Burner_1_Reset
– Preheat Burner reset command for use during a
burner lockout alarm. This is an “on/_on_” toggle selectable via the “up
arrow” button.
Burner_2_Reset
– Reheat Burner reset command for use during a
burner lockout alarm. This is an “on/_on_” toggle selectable via the “up
arrow” button.
Status
OA_Temp
– Current outside air temperature.
6
OA_Humidity
– Current outside air humidity.
Coil_Temp
– Current cooling coil exit temperature.
Preheat_Temp
– Current preheat exit temperature.
DA_Temp
– Current discharge air temperature (if more than one
discharge sensor is used this will be an averaged value).
DA_Humidity
– Current discharge humidity (if more than one
discharge sensor is used this will be an averaged value).
DA_Airflow
– Current discharge airflow CFM (only available if airflow
monitoring and control is available).
Cooling_Command
– Current cooling demand (0% - 100%).
Heat_Command
– Current preheat demand (0% - 100%).
Humidity_Command
– Current humidification demand (0% - 100%).
Reheat_Command
– Current reheat demand (0% - 100%).
Alarms
(alarm menu is only visible if an alarm is present)
Dirty_Prefilter
– Dirty pre-filter indication (only available if the unit
has dirty pre-filter monitoring as an option).
Dirty_Final_Fltr
– Dirty final filter indication (only available if the unit
has dirty final filter monitoring as an option).
Low_Temp_Alarm
– Low temperature lockout alarm. This is an
indication that the unit was discharging air colder than the “Low Temp
Alarm” setting in the “Config” menu for greater than “Low Temp Time”
minutes. Check the burner for proper operation.
OA_Temp_Sensor
– Outside temperature sensor alarm status.
Enumerated “no-fault/open/short”. Check sensor wiring.
OA_Hum_Sensor
– Outside humidity sensor alarm status.
Enumerated “no-fault/open/short”. Check sensor wiring.
Coil_Sensor
– Coil exit sensor alarm status. Enumerated “no-
fault/open/short”. Check sensor wiring.
7
Pre_Heat_Sensor
– Preheat temperature sensor alarm status.
Enumerated “no-fault/open/short”. Check sensor wiring.
DA_Temp_Sensor_1
– Discharge sensor #1 alarm status.
Enumerated “no-fault/open/short”. Check sensor wiring.
DA_Temp_Sensor_2
– Discharge sensor #2 alarm status.
Enumerated “no-fault/open/short”. Check sensor wiring.
DA_Hum_Sensor_1
– Discharge humidity sensor #1 alarm status.
Enumerated “no-fault/open/short”. Check sensor wiring.
DA_Hum_Sensor_2
– Discharge humidity sensor #2 alarm status.
Enumerated “no-fault/open/short”. Check sensor wiring.
Preheat_Lockout
– Preheat burner lockout alarm status. Indicates
the burner failed to light when requested. Enumerated “normal/lockout”.
Reheat_Lockout
– Reheat burner lockout alarm status. Indicates the
burner failed to light when requested. Enumerated “normal/lockout”.
Motor_Not_Resp
– Motor not responding alarm status. This
indicates the unit was enabled and the supply fan motor failed to start
within two minutes. Check VFD or overload (as available), OA damper limit
switch and wiring, and power.
Config
Low_Temp_Alarm
– If the unit discharges air below this temperature
set point for “Low Temp Time” minutes it will shut down and close the
isolation dampers.
Low_Temp_Time
– The time delay (in minutes) for the “Low Temp
Alarm”.
Min_Discharge
– The units minimum allowable discharge
temperature.
Max_Discharge
– The units maximum allowable discharge
temperature.
8
Advanced Menu
(Press and hold “menu” button for 5 seconds to enter)
Date Time
Year
– Set the real time clock year.
Date
– Set the real time clock date.
Time
– Set the real time clock time.
Advanced Config
– (Password Protected, Factory Only)
9
Network Integration
The controller in this unit can easily be integrated into a BACnet MS/TP
Building Management System. The controller will automatically detect the
baud rate of the network it is connected to after a power cycle, and will
automatically begin communications.
The MAC Address is set via the dip switches on the front of the controller.
When shipped, each unit will have a factory default MAC address with
multiple units for the same project having incremented MAC addresses.
The dip switches are numbered 1 through 8, with 1 being the LSB. The
numbering is standard binary format (switches 1 and 3 ON equals an
address of 5).
The Network Instance Number (device instance) is automatically
configured based on the MAC Address setting. The network instance
number will always be 3640+(MAC Address). For example, if the MAC
address is set to 25 the network instance number would be 364025. In the
event of a duplicate instance number on the network, simply change the
MAC address to change the instance number.
The following page has a complete listing of the BACnet points with their
descriptions.
10
object-name
object-
type
object-
instance
description
commandable
Inlet Temperature
AI
1
Outside Temperature
Sensor
Y
Inlet Humidity
AI
2
Outside Humidity
Sensor
Y
Cooling Coil Temperature
AI
3
Coil Exit Temperature
Y
Pre-Heat Exit Temperature
AI
4
Preheat Exit
Temperature Sensor
Y
Discharge Temperature 1
AI
5
Discharge Temperature
Sensor 1
Y
Discharge Humidity 1
AI
6
Discharge Humidity
Sensor 1
Y
Discharge Temperature 2
AI
7
Discharge Temperature
Sensor 2
Y
Discharge Humidity 2
AI
8
Discharge Humidity
Sensor 2
Y
Airflow Transmitter
AI
9
Discharge Airflow
Transmitter
Y
Fan ON
BI
10
Fan Running Contact
Y
Preheat Burner ON
BI
11
Preheat Burner ON
Contact
Y
Preheat Burner Lockout
BI
12
Preheat Burner Lockout
Contact
Y
Unit Enable
BO
1
Unit Enable - Open
Damper
Y
Pre-Heat Enable
BO
2
Preheat Enable Contact
Y
Re-Heat Enable
BO
3
Reheat Enable Contact
Y
Preheat Burner Reset
BO
4
Preheat Burner Reset
Contact
Y
Reheat Burner Reset
BO
5
Reheat Burner Reset
Contact
Y
Cooling Enable
BO
6
Cooling Enable Contact
Y
Pre-Heat Command
AO
7
Preheat Command
Y
Re-Heat Command
AO
8
Reheat Command
Y
Cooling Command
AO
9
Cooling Command
Y
Humidity Enable
BO
10
Humidity Enable
Contact
Y
Humidity Command
AO
11
Humidity Command
Y
VFD Command
AO
12
VFD Command
Y
User HMI_SpaceTemp
AI
5001
User HMI SpaceTemp
N
CoolingCommandPID
LOOP
1
Y
DirtyPreFitlerAlarm
MSV
1
Dirty Filter Alarm [MSV
Enumerated]
Y
LowTempAlarm
MSV
2
Low Temp Alarm [MSV
Enumerated]
Y
11
DischargeSensorAlarm
MSV
3
Discharge Temp Sensor
Alarm [MSV
Enumerated]
Y
OutsideTempSensorAlarm
MSV
5
Outside Temp Sensor
Alarm [MSV
Enumerated]
Y
OutsideHumiditySensorAlarm
MSV
6
Outside Humidity
Sensor Alarm [MSV
Enumerated]
Y
PreheatBurnerLockoutAlarm
MSV
7
Burner Lockout Alarm
[MSV Enumerated]
Y
MotorNotRespondingAlarm
MSV
9
Motor Not Responding
Alarm [MSV
Enumerated] (unit was
commanded on for 2
minutes and fan motor
did not start)
Y
Reheat Burner ON
BI
13
Reheat Burner ON
Contact
Y
Reheat Burner Lockout
BI
14
Reheat Burner Lockout
Contact
Y
Dirty Pre-Filter Switch
BI
15
Dirty Pre-Filter Switch
Contact
Y
Dirty Final Filter Switch
BI
16
Dirty Final Filter Contact
Y
Humidity_PID
LOOP
2
Humidity Control PID
Y
PreHeat_PID
LOOP
3
Preheat Control PID
Y
ReHeat_PID
LOOP
4
Reheat Control PID
Y
Airflow PID
LOOP
5
Airflow Control PID
Y
LowTempAlarmSetPoint
AV
1
Low Temp Alarm Set
Point
Y
LowTempAlarmTime
AV
2
Low Temp Alarm Time
(minutes)
Y
MinimumDischargeTemp
AV
3
Minimum Discharge
Temperature
Y
MaximumDischargeTemp
AV
4
Maximum Discharge
Temperature
Y
DirtyPreFilterSwitchAvail
BV
1
Dirty Pre-Filter Switch
Available
Y
DirtyFinalFilterSwitchAvail
BV
2
Dirty Final Filter Switch
Available
Y
HumidificationAvailable
BV
3
Humidification Available
Y
HumidificationType
BV
4
Humidification Type
(EVAP/STEAM)
Y
ReHeatAvailable
BV
5
Reheat Available
Y
12
DischargeSensorCount
BV
6
Number of Discharge
Temp/Humidity Sensors
Available
Y
AirflowAvailable
BV
7
Airflow (DFM)
Monitoring and Control
Available
Y
DischargeeTempSetPoint
AV
5
Discharge Temperature
Set Point
Y
DischargeHumiditySetPoint
AV
6
Discharge Humidity Set
Point
Y
DischargeAirflowSetPoint
AV
7
Discharge Airflow (DM)
Set Point
Y
PreHeatBurnerReset
AV
8
Preheat Burner Reset
Command
Y
ReheatBurnerReset
AV
9
Reheat Burner Reset
Command
Y
OutsideTemperature
AV
36
Outside Temperature
Y
OutsideHumidity
AV
37
Outside Air Humidity
Y
CoilExitTemperature
AV
38
Coil Exit Temperature
Y
PreheatExitTemperature
AV
39
PreheatExitTemperature
Y
DischargeTemperature
AV
40
Discharge Air
Temperature
Y
DischargeHumidity
AV
41
Discharge Humidity
Y
DischargeAirflowCFM
AV
42
Discharge Airflow CFM
Y
CoolingCommand
AV
43
Cooling Command
Precent
Y
PreheatCommand
AV
44
Preheat Command
Percent
Y
HumiditficationCommand
AV
45
Humidification
Command Percent
Y
ReheatCommand
AV
46
Reheat Command
Percent
Y
DirtyFinalFilterAlarm
MSV
21
Dirty Filter Alarm [MSV
Enumerated]
Y
CoilExitTempSensorAlarm
MSV
22
Coil Exit Sensor Alarm
[MSV Enumerated]
Y
PreheatTempSensorAlarm
MSV
23
Preheat Sensor Alarm
[MSV Enumerated]
Y
DischargeTempSensorAlarm_1
MSV
24
Discharge Temp Sensor
Alarm [MSV
Enumerated]
Y
DischargeTempSensorAlarm_2
MSV
25
Discharge Temp Sensor
Alarm [MSV
Enumerated]
Y
13
DischargeHumiditySensorAlarm_1
MSV
26
Discharge Humidity
Sensor Alarm [MSV
Enumerated]
Y
DischargeHumiditySensorAlarm_2
MSV
27
Discharge Humidity
Sensor Alarm [MSV
Enumerated]
Y
ReheatBurnerLockoutAlarm
MSV
28
Reheat Burner Lockout
Alarm [MSV
Enumerated] (unit was
commanded on for 2
minutes and fan motor
did not start)
Y
DirtyFinalFitlerAlarm
MSV
4
Dirty Filter Alarm [MSV
Enumerated]
Y
OutsideHumiditySensorAlarm 1
MSV
8
Return Temp Sensor
Alarm [MSV
Enumerated]
Y
MotorNotRespondingAlarm 1
MSV
10
Motor Not Responding
Alarm [MSV
Enumerated] (unit was
commanded on for 2
minutes and fan motor
did not start)
Y
FanCommand
BV
8
Fan Command
(enumerated 0=Off /
1=On)
Y
UnitDesignCFM
AV
10
Unit Design CFM (used
when airflow
monitoring and control
not available)
Y
ManualVFDSpeedPercent
AV
11
Manual VFD Speed Set
Point (overrides
automatic VFD control /
use 'null' value for
automatic control)
Y
UnitInstallationAltitude
AV
12
Altitude in Feet Above
Sea Level at which the
unit is installed
Y