Installation Menu
Description of Installation Menu Options • 27
quence start up multiple unit/thermostat in one loca-
tion. The default value is OFF. The range of settings
is from 10 sec to 120 sec.
9.3. Installation Menu
9.3.1. About the Device
This menu item provides access to a customer
screen providing details about the thermostat and
communication firmware version.
9.3.2. Economizer Settings
1. Mode
Installer can select between a fixed or variable
damper operation.
2. Actuator Setting
Installer can select between 0-10VDC actuator or
2-10VDC actuator operation (
Table 9-1
).
3. Minimum Damper
Installer can select a minimum fresh air position
for the damper. When the fan G terminal is ON and
the thermostat is in occupied mode, the minimum
fresh air position will be maintained.
4. Use for Cooling (Economizer) — Outdoor and
Supply Air Temperature Sensors Required
Allows the operation of the mechanical cooling if
the free cooling (economizer) cannot maintain the
cooling setpoint.
•
OFF
-Typically applies when the SAT (supply air
temperature sensor) is installed after the mechanical
cooling refrigeration coils. In this case, mechanical
cooling will never operate at the same time as free
cooling.
•
ON
-Typically applies when the SAT (supply air
temperature sensor) is installed before the mechani-
cal cooling refrigeration coils in the mixing plenum.
In this case, mechanical cooling is allowed when the
free cooling (economizer operation) cannot main-
tain the cooling setpoint.
Default value: OFF.
5. Changeover OT Setpoint — Outdoor Air
Temperature Sensor Required
In Cooling mode. If the outdoor temperature is be-
low this value, the cooling will be switched over from
mechanical (compressor) to free cooling (economiz-
er).
14 to 70º F (-10.0 to 21.0º C). Default value: 55º
F(13.0º C).
6. Supply Air Setpoint — Supply Air Temperature
Sensor Required
Installer can select the supply air setpoint that al-
lows for economizer (free cooling) operation. Supply
air setpoint. Free cooling supply air setpoint when
economizer mode is enabled. Range 50 to 90º F (10.0
to 32.0º C). Default value: 55º F (13.0º C).
7. Economizer Delta — Outdoor Air Temperature
Sensor Required
The Economizer Delta number is used to decide if
the room temperature is above the outdoor tempera-
ture. If the indoor temperature is above the selected
delta setting the economizer will be enabled. Range 1
to 10º F.
8. Occupancy Pre-purge
The feature is used prior to the occupied program
periods. The thermostat will automatically turn on the
circulator blower and open damper for a pre-purge up
to three hours before the Day schedule period time.
When enabled, the circulator blower is on during the
occupied time until the unoccupied Night scheduled
program time. Range OFF; 10 min; 30 min; 1 hr; 2 hr;
3 hr. Default: OFF.
9.3.3. Sensor Settings
1. OAT Enable
Turns on the outdoor air temperature sensor
2. OAT Display
Outdoor Temperature displayed on home screen
3. OAT Offset
Installer offset of outdoor air temperature sensor to
compensate for conditions (direct sunlight) affecting
the sensor
4. IRT Enable
Turns on the indoor remote air temperature sensor
5. IRT Display
Displays indoor remote reading on home screen
Outside
Air%
0
%
5
%
10
%
15
%
20
%
25
%
30
%
Setting for
0~10VDC
Actuator
0%
5%
10
%
15
%
20
%
25
%
30
%
Setting for
2~10VDC
Actuator
0
to
20
%
24
%
28
%
32
%
36
%
40
%
44
%
Table 9-1
- Actuator Setting Options