14
THIRD PARTY CONTROL
Third party controls may interface with the unit SystemVu™
controller through the connections described below. See other
sections of these instructions for more information on the relat-
ed unit control and configurations.
Cooling/Heating Control
The thermostat inputs are provided on TB1 of the board. The
Unit Control Type configuration, UNIT CONTROL TYPE,
must be 0 (Tstat) to recognize the below inputs. Terminal R is
the 24 VAC source for the following:
Y1 = first stage cooling
Y2 = second stage cooling
Y3 = third stage cooling
W1 = first stage heating
W2 = second stage heating
G = Indoor fan
Dehumidification Control
On Humidi-MiZer
®
system units the HUMIDISTAT and SPRH
leads are provided with quick connects. The Space Humidity
Switch configuration, SETTINGS UNIT
CONFIGURATIONS SWITCH INPUTS CONFIGS
HUMSTAT CHANNEL identifies the normally open or normal-
ly closed status of this input at HIGH humidity. The RH Sensor
configuration, SETTINGS UNIT CONFIGURATIONS
ANALOG INPUTS CONFIGS SPRH SENSOR CHAN-
NEL, identifies the point on the MBB (Main Base board) or the
IOB (Input Output board) the sensor was wired into.
Remote Occupancy
The remote occupancy input can be provided on one of the
configurable inputs, most commonly TB3. The Remote Occu-
pancy Switch configuration, REMOTE OCC TYPE, identifies
the normally open or normally closed status of this input when
unoccupied. The Remote Occupancy Channel configuration,
REMOTE OCC CHAN, identifies the discrete input (DI) as-
signed for this function.
Remote Shutdown
The remote shutdown input is provided for unit shutdown in
response to switch input configured most commonly on TB3.
The Remote Shutdown Switch configuration, REM. SHUT-
DOWN TYPE, identifies the normally open or normally closed
status of this input when there is no shutdown command. The
Remote Shutdown Channel configuration, REM. SHUT-
DOWN CHAN, identifies the discrete input (DI) assigned for
this function.
Alarm Output
The alarm output is provided on as a configurable relay, most
commonly on TB2, to indicate when a current alarm is active.
The output will be 24 VAC if a current alarm exists. The Alarm
Relay Channel configuration, ALM RELY CHANNEL, identi-
fies the discrete output (DO) assigned for this function.
Economizer Damper Control
For units with the economizer option or accessory, the damper
position can be directly controlled through the IAQ sensor in-
put. The IAQ Analog Input configuration, IAQ LEVEL CON-
TROL will have to set to 2 (CTL MINP). When IA.CF = 2, an
external 4 to 20 mA source is used to move the damper 0% to
100% directly.
CONTROLS OPERATION
Display Configuration
The SETTINGS DISPLAY SETTINGS submenu is used to
configure the local display settings.
METRIC DISPLAY
This variable is used to change the display from English units
to Metric units.
LANGUAGE
This variable is used to change the language of the SystemVu
display. At this time, only English is available.
CONTRAST ADJUST
This is used to adjust the contrast of the SystemVu display.
PASSWORD ENABLE?
This variable enables or disables the use of a user password.
The password is used to restrict use of the control to change
configurations.
VIEW USER PASSWORD
This menu allows the user to view the user password. The
password must be entered or disabled to view it.
Table 5 — Independent, Cooling, and Heating
Automatic Tests
AUTO INDP TEST
Step Action Hold (Sec)
1 Turn on Crankcase Heater Relay 0
2 Set ODF1 to the High Cool Speed 30
3 Set ODF1 to the Minimum Speed 30
4 Turn ODF1 off 5
5 Set ODF2 to the High Cool Speed 30
6 Set ODF2 to the Minimum Speed 30
7 Turn OD21 off 5
8 Set ODF3 to the High Cool Speed 30
9 Set ODF3 to the Minimum Speed 30
10 Turn ODF3 off 5
11 Set IDF speed to 100% 30
12 Set Economizer Damper to 100% 60
13 Turn on power exhaust 1 10
14 Turn on power exhaust 2 10
15 Set Economizer Damper to 0% 60
16 Turn off power exhaust 2 10
17 Turn off power exhaust 1 10
18 Set IDF to the ventilation speed 30
19 Turn on alarm relay 10
20 Turn off alarm relay 10
21 Set IDF to 0% speed 30
22 Turn off Crankcase Heater relay 0
AUTO COOL TEST
Step Action Hold (Sec)
1 Set ODF auto transition 0
2 Set IDF auto transition 0
3 Turn on Cool A1 test 60
4 Turn off Cool A1 test 30
5 Turn on Cool A2 test 60
6 Turn on Cool A1 and Cool A2 tests 30
7 Turn off Cool A1 and Cool A2 tests 60
8 Turn on Reheat test 60
9 Switch to Subcool test 30
10 Turn off Subcool test 30
AUTO HEAT TEST
Step Action Hold (Sec)
1 Set IDF auto transition 0
2 Turn on Heat 1 test 60
3 Turn on Heat 2 test 60
4 Turn off Heat 1 and Heat 2 tests 20
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