AbsolutAire UC-3 User manual

UC-3
User Guide
© 2021 AbsolutAire, Inc.
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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.
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Table of Contents
Images
Warning 1
HMI Screen Information 3
Sensor Alarm Display 4
A Note About Custom Designs 1
Introduction 3
Operation 3
Schedule 5
Menu Tree 6
Scrolling Display 6
Quick Access 6
Set Points 6
Status 7
Alarms 8
Schedule 9
Config 9
Advanced Menu 10
Network Integration 11
Tables
Network Points List 12
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Introduction
The Smart-Vue User Interface (UI) for the UC-3 Control System displays
the information necessary to operate and diagnose the Heating and
Ventilating Unit.
This is connected to the controller via a CAT-5E cable with a maximum
length of 600 feet.
HMI Screen Information
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 center of the
display is the indicator for indoor temperature. If an outdoor temperature is
being displayed the thermometer will be outside of the house. 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. In the bottom center is the mode of operation and at the bottom
right is the occupancy status.
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.
Operation
The system has a scrolling display which displays the current Space
Temperature, as well as Building Pressure and Relative Humidity (if
equipped). 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 be viewed only.
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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 temperature or building pressure, 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
“mode”. Use the up arrow to select “heat or vent” (unless the unit has air
conditioning, in which case the choices will be “heat/cool/air”). When you
have made your choice, press the “menu” button to move to the next menu
item, which will be the Occupied Heat 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, damper positions, 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.
Sensor Alarm Display
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The “SCHEDULE” will be described later. This is a 7-day occupancy
schedule used for the purpose of temperature or operation changes during
unoccupied times.
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.
Schedule
To set the 7-day occupancy schedule, press the “menu” button until you
see “SCHEDULE” in the top right of the display. Press the “up arrow” to
enter the schedule. Your first option will be “DAY”. Use the “up/down” arrow
to select the day for this schedule. Once you have selected the day, press
“menu” to go to the next field which will be the Occupied Hour. This is the
hour (I.E. in 24 hour format, 5pm is hour 17) of the day the system will
become Occupied. Use the “up/down” arrows to select the appropriate
hour, then press “menu” to move to the Occupied Minute. Again, use the
“up/down” arrows to select the appropriate minute then press “menu” to
move to the Unoccupied Hour and Unoccupied Minute settings. When the
occupied and unoccupied hours and minutes have been set for that day,
return to “DAY” and use the “up/down” arrows to move to the next day. If
you do not want to set a schedule for a certain day, simply leave the hours
and minutes at a value of zero (0) and that day will be ignored by the
schedule. After you have completed setting the schedule, return to the main
display by using the “BACK” options or by not pressing any buttons for 15
seconds.
Once the schedule is set, the unit will follow the occupied and unoccupied
temperature set points for each day.
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Menu Tree
Scrolling Display
Space_Temp – Current space temperature at the User Interface (or
remote space temperature sensor if equipped).
Bldg_Pressure – Current building pressure (only displayed if the unit
has Building Pressure as an option).
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
Mode – This is the mode of operation. Select “Heat” or “Vent” as
desired (if the unit has cooling installed the choices will be “Heat/Cool/Air”)
Occ_Heat – Occupied Heat Set Point.
Unocc_Heat – Unoccupied Heat Set Point (only available if the unit
has scheduling as an option).
Occ_Cool – Occupied Cooling Set Point (only available if the unit
has cooling as an option).
Unocc_Cool – Unoccupied Cooling Set Point (only available if the
unit has scheduling and cooling as options).
BP_Set_Point – Building Pressure Set Point (only available if the unit
has building pressure control as an option).
Econ_Override – Economizer Override function to override
automatic building pressure control of dampers or the supply fan VFD (only
available if the unit has building pressure control as an option). Set to the
override percent you desire, or select “null” by pressing he “up” and “down”
arrow buttons at the same time for automatic control.
Man_Econ_Pct – Manual Economizer Percent for damper or supply
fan VFD control (only available if the unit has manual speed or economizer
control as an option).
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Man_Econ_Speed – Manual Economizer setting for “two speed” or
“two position” economizer operation (only available if the unit has two
position or two speed as an option). Choices are “LOW” and “HIGH”. These
values are set in the “CONFIG” menu.
Burner_Reset – Burner reset command for use during a burner
lockout alarm. This is an “on/_on_” toggle selectable via the “up arrow”
button.
Status
Space_Temp – Current space temperature at the User Interface (or
remote space temperature sensor if equipped).
OA_Temp – Current outside air temperature.
RA_Temp – Current return air temperature (only if the unit has return
air as an option).
DA_Temp – Current discharge air temperature.
Cool_Coil_Temp - Current cooling coil exit temperature (only if the
unit is equipped with cooling).
Bldg_Pressure – Current building pressure (only available if the unit
has building pressure as an option).
Econ_Command – Current economizer command issued to the
dampers or supply fan VFD (only available if the unit has an economizer
option).
Heat_Command – Current command (0% - 100%) issued to the
burner for heat.
Cool_Command - Current command (0% - 100%) issued to the
cooling system (only if the unit is equipped with cooling).
Active_Stages - Current number of active cooling stages (only if the
unit is equipped with cooling).
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Alarms (alarm menu is only visible if an alarm is present)
Dirty_Filter – Dirty filter indication (only available if the unit has dirty
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.
Space_Sensor – Space sensor alarm status. Enumerated “no-fault/
open/short”. Check sensor wiring.
OA_Sensor_Alarm – Outside sensor alarm status. Enumerated “no-
fault/open/short”. Check sensor wiring.
RA_Sensor_Alarm – Return sensor alarm status. Enumerated “no-
fault/open/short”. Check sensor wiring (only available if unit is not 100%
outside air).
DA_Sensor_Alarm – Discharge sensor alarm status. Enumerated
“no-fault/open/short”. Check sensor wiring.
Burner_Lockout – Burner lockout alarm status. Indicates the burner
failed to light when requested. Enumerated “normal/lockout”.
Damper_Feedback – OA/RA damper position feedback error.
Indicates the processor is not receiving a valid position signal. Check
damper wiring.
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.
Burner_Not_Respond - Indicates the burner was commanded to
light and the controller did not receive confirmation.
Burner_Watchdog - Indicates the burner did not reach the requested
discharge temperature within 5 minutes. Possible problem with gas
pressure or gas valves.
Point_Override - Indicates a hardware point was overridden by the
building management system. As all control points are available to the
network, overrides are unnecessary. Remove the override to clear the
alarm.
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Schedule (only visible if the unit has scheduling)
Day – Schedule day to be programmed.
Occ_Hour – Occupied hour to be programmed. This is the hour (in
24 hour format) that the unit will assume occupied status.
Occ_Minute – Occupied minute to be programmed. This is the
minute of the hour the unit will assume occupied status.
Unocc_Hour – Unoccupied hour to be programmed. This is the hour
(in 24 hour format) that the unit will assume unoccupied status.
Unocc_Minute – Unoccupied minute to be programmed. This is the
minute of the hour the unit will assume unoccupied status.
Config
Heat_Lockout – Heating mild weather stat setting. When the outside
or mixed air temperature is above this setting the burner will be
automatically disabled (only available if the unit has mild weather stat as an
option).
Cool_Lockout – Cooling mild weather stat setting. When the outside
or mixed air temperature is below this setting the cooling will be
automatically disabled (only available if the unit has cooling as an option).
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 (Only available if LTL is available).
Low_Temp_Time – The time delay (in minutes) for the “Low Temp
Alarm” (Only available if LTL is available).
Control_Type – Determines the type of control the unit will follow.
Enumerated “space/discharge”.
Min_Discharge – The units minimum allowable discharge
temperature.
Max_Discharge – The units maximum allowable discharge
temperature.
Cycle_Occupied – Determines if the unit will cycle on/offto space
temperature when in occupied status. Enumerated “yes/no”.
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Cycle_Unoccupied – Determines if the unit will cycle on/offto space
temperature when in unoccupied status. Enumerated “yes/no”.
Low_Econ_Limit – Economizer low limit. Used to limit the minimum
position of dampers or the minimum VFD speed. Also used with two speed/
position economizer.
High_Econ_Limit – Economizer high limit. Used to limit the
maximum position of dampers or the maximum VFD speed. Also used with
two speed/position economizer.
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.
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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.
Network Integration
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