59
Table 12. CORE Control System Unit Parameters
Control
Parameter
No
Screen Name
Parameter Short
Description
Control Value
Units Description
Min. Default Max.
151
HEAT STAGE4
DIFFER
Heating Stage 4
Differential
0 2 3 °F
• Heating stage 4 differential
temperature. Used only with room
sensor applications.
• Differential temperature must
greater than or equal to Parameter
150.
152
AUTO CHGOVR
DEADBND
Automatic
Changeover
Deadband
2 3 10 °F
• Minimum auto changeover dead-
band temperature. Dead band
must be greater than or equal to
Parameter 142 plus Parameter 143.
• Used in room sensor applications.
153
AUTO CHGOVR
DELAY
Automatic
Changeover
Delay
1
Default may
be altered at
factory test.
15 Minutes
Auto changeover time delay. Delay
between heating and cooling modes.
154
OCC BLOWER
MODE
Occupied Blower
Mode
AUTO-
CYCLES
Option
Blower control option for room sensor
applications during occupied periods.
• Auto Cycle: Blower cycles with
demand
• On-Continuous 1: blower is on
with either the occupancy sensor
or occupancy schedule indicates
occupied.
• On-Continuous 2: Blower is on only
when both the occupancy sensor
and occupancy scheduler indicates
occupied.
• On-Continuous 3: lower is on only
when both the occupancy sensor
and occupancy scheduler indicates
occupied. in addition, blower will be
on a minimum of 25% of the time
when occupancy scheduler indicates
occupied by the occupancy sensor
indicates not occupied. The 25%
minimum is achieved by turning
blower on for 30 minutes and off for
90 minutes.
155
FREECOOL
LOCKOUT SP
Free Cooling
Lockout Set Point
30 30 60 °F
• Locks out free cooling when outdoor
temperature is below the set value.
• Setting value to 29°F disables free
cooling lockout.
156
FRESH AIR
HEAT SP
See CORE System Application Guide for further details and to change the fresh air heat (FAH) set point. Modify the
set point only using the method described in the reference section.
157
FAH STAGE
DEADBAND
Fresh Air Heating
Stage Deadband
3 10 15 °F Fresh Air Heating stage dead-band.
158
FAH MIN CYCLE
TIME
Fresh Air Heating
Minimum Cycle
Time
120 480 1800 Seconds Fresh Air heating minimum cycle time.
159
FREE COOL
SUPPLY SP
Free Cooling
Supply Set Point
45 55 65 °F
Economizer modulates dampers to
maintain supply air temperature (RT6) at
this set point during free cooling. DACC
reset applies. See Parameter 207 -
Parameter 201
160
ECON FREECL
TEMP SP
Economizer
Free Cooling
Temperature Set
Point
40 60 75 °F
Outdoor Air Temperature is less than
Parameter Set Point between 41-75°F,
or when Outdoor Air temperature is less
than Return Air Temperature between
0-40°F.
161
ECON FRCL
TMP OFFSET
Economizer
Free Cooling
Temperature
Offset
0 10 40 °F
Economizer Free Cooling Temperature
Offset
162
ECON FREECL
ENTH SP
Economizer Free
Cooling Enthalpy
Set Point
10 12 19 mA
Economizer Free Cooling Enthalpy Set
Point
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