Lennox Prodigy 2.0 Application Manual page 112

Control Parameter
No Screen Name Parameter Short Description
152 AUTO CHGOVR DEADBND
153 AUTO CHGOVR DELAY Automatic Changeover Delay
154 OCC BLOWER MODE
155 FREECOOL LOCKOUT SP Free Cooling Lockout Setpoint
156 FRESH AIR HEAT SP Fresh Air Heating Setpoint
157 FAH STAGE DEADBAND
Fresh Air Heating Minimum
158 FAH MIN CYCLE TIME
159 FREE COOL SUPPLY SP Free Cooling Supply Setpoint
Economizer Free Cooling
160 ECON FREECL TEMP SP
Economizer Free Cooling
161 ECON FRCL TMP OFFSET
Economizer Free Cooling
162 ECON FREECL ENTH SP
Economizer Free Cooling
163 ECN FRCL ENTH OFFST
Table 64. M3 Control Parameters
Min.
Automatic Changeover
2.00
Deadband
Check unit parameter
label as default may
1
be altered at factory
Occupied Blower Mode
30.0
40
Fresh Air Heating Stage
3.0
Deadband
2
Cycle Time
45.0
40.0
Temperature Setpoint
00.0
Temperature Offset
10.0
Enthalpy Setpoint
1.0
Enthalpy Offset
Control Value
Default Max. Units Units
3.00 10.00 °F
15 Minutes
test.
AUTO-CYCLES Option
60.0 °F
30.0
70.0 °F
40.0
10.0 15.0 °F
8 30 Minutes
55.0 65.0 °F
75.0 75.0 °F
10.0 40.0 °F
12.0 19.0 mA
1.0 5.0 mA
Description Description
•
Minimum autochangeover dead-band temperature. Dead band
must be greater than or equal to Parameter 142 plus Parameter
143.
•
Used in room sensor applications.
Autochangeover time delay. Delay between heating and cooling
modes.
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.
•
Locks out free cooling when outdoor temperature is below the set
value.
•
Setting value to 29°F disables free cooling lockout.
Fresh Air Heating set point. To enable FAH, set this to a value
between 41°F and 70°F.
Fresh Air Heating stage dead-band.
Fresh Air heating minimum cycle time.
Economizer modulates dampers to maintain supply air temperature
(RT6) at this set point during free cooling. DACC reset applies. See
Parameter 207 - Parameter 201
Outdoor Air Temperature is less than parameter setpoint between
41-75°F , or when Outdoor Air temperature is less than Return Air
Temperature between 0-40°F.
Economizer Free Cooling Temperature Offset
Economizer Free Cooling Enthalpy Setpoint
Economizer Free Cooling Enthalpy Offset