Lennox Prodigy 2.0 Application Manual page 45

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High Efficiency Energence A Box Units with Smart Airflow™ (Advance Airflow) ­ Applications that have Smart
Airflow™ option installed and with successful blower calibration, will run the blower at a calculated percent output to
deliver the airflow as set by the installer. The table below shows the default Airflow set points parameter. Parameter
18 by default is 0 but needs to be set to a valid value during installation.
Table 35. High Efficiency Factory Settings (CFM) ­ A Box Smart Airflow™ (3­ to 5­ton Units)
Operation
Cooling low, Free cooling low
Cooling high, Free cooling high
Heating
Ventilation
Smoke alarm modes
Minimum Outdoor Airflow
* Setting in CFM = tonnage of the unit multiplied by Parameter value in CFM/ton.
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Standard Efficiency Energence A Box Unit with a Belt­Drive Two­Speed Motor. The speed is not parameter
selectable. During first stage cooling blower is at low speed, while blower runs at high speed in heating, second stage
cooling and smoke alarm (if configured), Ventilation may use low or high speed blower.
9.3.2. B Box (7.5 – 12.5 ton units)
Energence B Box 7.5 to 12.5­ton MSAV units use direct driven blower (ultra­high efficiency units only) or belt driven blower
with Variable Frequency Drive (VFD). Units have two compressors and on ultra­ high efficiency units they are set for tandem
operation. The actual blower speed and CFM delivered will depend on the flow restriction as well as the percent output. The
blower output for each mode of operation has been factory set, but it will need to be adjusted during test & balance on the
installed duct­work and the air delivery required for the application. The table below shows the default blower outputs
parameters as well as options for minimum damper position.
Refer to table 19 and 20 in Section 6.6 for detailed information on system operation in various configurations and operating
modes.
Table 36. B Box (2­Compressor) Units with Multi-Stage Air Volume (7.5 ­12.5 ton)
7.5
Parameter
Note: Any changes to Smoke CFM setting must be adjusted before the other CFM settings.
3000
12
CFM
SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > BLOWER > SPEEDS)
3000
13
CFM
2700
14
CFM
1950
17
CFM
3000
18
CFM
1195
19
RPM
9 0%
132 0%
29 101%
3 ­ ton
(in CFM)
780
1080
1200
0
1200
120
Capacity (tonnage)
8.5 10
Use SETTINGS > RTU OPTIONS > EDIT PARAMETERS
3400 4000
CFM CFM
3400 4000
CFM CFM
2200 3600
CFM CFM
3050 2600
CFM CFM
3400 4000
CFM CFM
1425
N/A
RPM
SETUP > TEST & BALANCE (can also use SETTINGS > RTU OPTIONS > DAMPER)
0% 0%
0% 0%
SETTINGS > RTU OPTIONS > EDIT PARAMETERS
101% 101% 101%
4 ­ ton 5 ­ ton Parameter Value
(in CFM) (in CFM)
1040 1300
1440 1800
1600 2000
0 0
1600 2000
160 200
12.5
5000
Blower CFM during smoke detection.
CFM
5000
CFM Blower CFM during heating.
4500
CFM Blower CFM during high speed (2 compressors) cooling.
3250
Blower CFM during low speed (1 compressor) and free cooling.
CFM
5000
CFM Blower CFM during ventilation.
1655
Blower RPM for max CFM (applicable only to unit with blower direct drive)
RPM
0% Damper min. position during LOW blower operation.
0% Damper min. position during HIGH blower operation.
Damper minimum position during G blower operation. (Setting parameter
29 to "101" disables parameter 29 and passes control to parameter 9 or
132)
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Parameter
Value
(in CFM/ton)*
(in counts)
260 130
360 180
400 200
0 0
400 200
40 40
Description
Parameter
12
14
13
18
12
237