Wall-Mount Unit Architecture - Bard D25A2PA Installation And Service Instructions Manual

WALL-MOUNT UNIT ARCHITECTURE

CAUTION: The Bard DC Free Cooling Unit System has been pre-programmed with what is widely considered to
be the best settings for efficiency and operation. Any changes to internal programming through the LC Series
controller or the TEC-EYE
TM
internal damage to the HVAC units, cause the shelter to overheat or other very serious consequences. Although
complete controller programming architecture for the wall-mount unit controller has been provided, going outside the
boundaries of what has been covered in this manual not recommended.
Screen Menu Item
MAIN STATUS SCREEN
The Status screen is the default screen on startup, and anytime more than 5
minutes has elapsed from last change. (Use UP/DOWN keys to scroll)
RAT
SAT
OAT
OAH
Dewpoint
Blower
Damper
Master Control
Status
MAIN MENU
Main Menu screen(s) allows access to operational programming, access by pressing MENU key at any time. (MENU key
to enter, use UP/DOWN keys to scroll)
ON/OFF UNIT
Unit Address
Power by Display
Status
End of ON/OFF UNIT
SETPOINTS
Cooling Setpoint
Heating Setpoint
Cooling Stg. Diff.
Heating Stg. Diff.
FreeCool
DC OA-Return Diff.
Supply Temp Low Limit
Differential
Damper Time
Runtest Time
Freeze Temp Low Limit
Manual 2100-643C
Page 46 of 59
not covered within this manual may cause the systems to operate improperly, cause
Range
Off/On
On/Off
All setpoint changes are limited to 60 minutes
65°F – 90°F
52°F – 75°F
1°F – 5°F
1°F – 5°F
55°F, 57°F,
59°F, 61°F
0°F – 99.9°F
28°F – 65°F
0°F – 99.9°F
0-999
0-999
0°F – 99.9°F
Default Value
Displays current data
°F Current return air temperature
°F Current supply Air temperature
°F Current outdoor air temperature
% Current outdoor air humidity
°F Current temperature of dewpoint
Displays status of blower
% Displays percentage of current opening
Current operational status, "Running
Master Control
Stand Alone" if communication lost
D-Series controller board is currently
Unit On active, "Off by Keyboard" if disabled by
TEC-EYE
TM
1 Physical address of controller
On
"OFF by Keyboard" system has been
Blower
turned off at controller
77°F
60°F
5°F
2°F
55°F
7°F
35°F
20°F
Time alloted before damper fail is
150 seconds
realized
60 seconds
Temperature sensed by Freezestat which
30°F
initiates compressor shutdown
Description