LG Multi V 5 Reference Manual page 4

LG Split DOAS Set Up Reference Guide
DOAS Operation
Following installation, DOAS configuration and testing includes the process
identified below.
5. Check the Simple Unit Operation (Supply Air Control)
‐. Dehumidification : Default Setting of Activating Dehumidification mode is based on OA Dew Point.
Dew point is calculated by OA Temp and OA Humidity. When OA temp is greater than dewpoint set point(e.g 60F),
unit enters dehumidification mode.
In dehumidification mode, there is a separate target temperature, which is Main Coil Temperature.
Unit will cool down to Cooling Coil temperature and then reheat to the Target temperature, under
Cooling/Heating Target Temperature.
‐. Additionally, check whether the unit enters the Dehumidification mode properly with the Manual Override
function. If the OA dew point is set as 60F for activating dehumidification mode, OA dewpoint should be higher in order
to enter dehumidification mode. There is no way to set dewpoint directly on manual override, please refer to the
'Dewpoint Calculator' on the Support Menu on Web UI. There, the adjustment of the Temp. and Humidity will set up
dewpoint.
Temperature
Relative Humidity
Support
NOTE: To Control the Unit base on Space Humidity or enthalpy for dehumidification mode, a 3
party Sensor must be installed.
Dew Point : 60F
DOAS Unit operates to cool down
by 55F by Main Coil for dehumidification
Dewpoint
If OA dew point is over (e.g 60F)
Dehumidification mode is activated
3. Reheat to 72F by Hot gas reheat Coil
‐. While adjusting the temperature and humidity
values, check whether the dew point is higher
than the value we set in the Web UI, and if it is,
put the temperature and humidity values i n
Manual override and check that the unit
enters dehumidification mode.
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