Lennox LCH036 Installation Instructions Manual page 98

TABLE 41
580684
LGH/LCH 122U4E (2-Compressor) Staged Direct Drive
Para­
met­
Field
Factory
er
Setting
Setting
Note: Any changes to Smoke CFM setting must be adjusted
before the other CFM settings. Use SETTINGS > RTU OPTIONS
> EDIT PARAMETERS
4000
12 CFM
CFM
SETUP > TEST & BALANCE (can also use SETTINGS > RTU
OPTIONS > BLOWER > SPEEDS)
4000
CFM
CFM
4000
CFM
CFM
2600
CFM
CFM
4000
CFM
CFM
1425
RPM*
RPM
*Once all four blower settings are entered, the target (highest of the
heating and cooling settings) CFM will be displayed. Once the RPM
is saved for the target CFM, all other blower RPM values are set by
the Unit Controller according to the field CFM setting..
SETUP > TEST & BALANCE (can also use SETTINGS > RTU
OPTIONS > DAMPER)
0%
0%
50%
SETTINGS > RTU OPTIONS > EDIT PARAMETERS
29 101% %
Open
216 5%
SETTINGS > RTU OPTIONS > EDIT PARAMETER
85 40°F
86 40°F
Description
Blower CFM during smoke
detection.
Blower CFM during heating.
Blower CFM during high speed
cooling (2 compressor)
operation.
Blower CFM during low speed
cooling (1 compressor)
operation.
Blower CFM during ventilation.
Adjust RPM based on unit static
and blower tables to reach tar­
get CFM.
Damper min. position during
%
LOW blower operation.
Damper min. position during
%
HIGH blower operation.
Min. damper % for stage 1 pow­
%
er exhaust operation.
Damper minimum position during
G blower operation. (Setting para­
meter 29 to "101" disables para­
meter 29 and passes control to
parameter 9 or 132)
Deadband % for stage 1 power
%
exhaust operation.
Compressor 1 low temp lockout.
°F Settings lower than 40°F could
void warranty.
Compressor 2 low temp lockout.
°F Settings lower than 40°F could
void warranty.
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