Lennox LCH036 Installation Instructions Manual page 42

C­Enter Outdoor Airflow Design Specifications Into
Unit Controller
Use the following menu path to enter the outdoor airflow
CFM (replaces minimum damper position set point) into
the Unit Controller. Make sure outdoor airflow CFM is
within limitations shown in table 31. Refer to the Unit
Controller manual provided with unit.
SETTINGS > RTU OPTIONS > DAMPER
Press the SAVE button to cycle through the sub-menu
until the OUTDOOR AIRFLOW input screen is displayed.
Enter the value and press SAVE.
Press the MAIN MENU button to go to the main menu and
press the BACK button to go to the status screen.
Parameter Name
SETUP > TEST & BALANCE > BLOWER
COOLING HI SPEED / HEATING MAXIMUM (480 CFM/TON)
COOLING HI SPEED MINIMUM (280 CFM/TON)
COOLING LOW SPEED MINIMUM (220 CFM/TON)
GAS HEAT - STANDARD - MINIMUM CFM
GAS HEAT - MEDIUM - MINIMUM CFM
GAS HEAT - HIGH - MINIMUM CFM
ELECTRIC HEAT - MINIMUM CFM
VENTILATION MINIMUM (150 CFM/TON)
SETUP > TEST & BALANCE > DAMPER
OUTDOOR AIRFLOW CFM MAXIMUM CFM
SETTINGS > RTU OPTIONS > EDIT PARAMETER = 12
In order for the SMOKE CFM change to take effect, go to SETUP > TEST & BALANCE > BLOWER and run the the wizard. Performing this
task will recalculate the output to the desired CFM. No adjustments are required during this procedure.
MSAV SMOKE CFM MAXIMUM
Installer: Configuration ID 1, position 7 needs to be set to either S or L. Circle applicable unit model number and record any CFM changes under
"Field Set CFM Value" column. Settings need to be recorded by installer for use when Unit Controller is replaced or reprogrammed.
D­Operation
1- After calibration, the indoor blower will supply the
2- The Unit Controller, using input from PT5 and the
TABLE 31
MINIMUM / MAXIMUM CFM
LGH/LCH036-060 Unit Parameter Settings
Page 42
CFM specified based on the thermostat demand
signal received by the Unit Controller:
G – Ventilation CFM
W – Heating CFM
Y1 – Cooling Low CFM
Y2 – Cooling High CFM
entered outdoor air flow CFM, will open the fresh
air dampers to minimum position. In addition, the
Unit Controller must have an occupied (OCP)
thermostat demand.
LCH/LGH Default Factory Settings
036H4E
1440
840
660
970
1120
1310
1080
450
450
1440
LGH/LCH036, 048, 060, 072
048H4E 060H4E
1920 2400
1120 1400
880 1100
970 970
1120 1120
1310 1310
1280 1600
600 750
600 750
1920 2400