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LHT/LDT024, 036, 048, 060
5- From the mobile service app, use TEST & BALANCE
> BLOWER menu to modify the following blower
parameters:
•HEATING HIGH CFM
This is the percentage of torque for blower heating
speed.
•HEATING LOW CFM
This is the percentage of torque for blower heating
low speed on single phase gas heating units only.
•COOLING HIGH CFM
This is the percentage of torque for blower cooling high
speed. For 024 units, this is the only cooling speed.
•COOLING LOW CFM
This is the percentage of torque for blower cooling
low speed (036, 048, and 060 units only) and vent
speed for standard static blowers (all units).
•VENTILATION CFM
This is the percentage of torque for high static blower
ventilation speed.
TABLE 3
ELECTRIC HEAT MINIMUM AIRFLOW
kW
CFM
Direct Drive
Direct Drive
(Impeller-Style)
5
600
NA
7.5
600
1200
10
600
NA
15
1100
1500
22.5
1600
2000
C-Adjusting Unit CFM
The supply CFM can be adjusted by changing Unit
Controller settings. Refer to table 4 for menu paths and
default settings. Record any CFM changes on the
parameter settings label located on the inside of the
compressor access panel.
IMPORTANT - The default value for Cooling Low CFM
is lower than a traditional singe- or two-speed blower. If
operating the unit with a 2- or 3-stage controller (2- or
3-stage thermostat, DDC controller, etc.), it is
recommended to increase the Cooling Low CFM
default value to a suitable level for part load cooling
(typically 60% of full load CFM).
