Constant Air Flow Control - Carrier 42/38SHDS050 Installation Manual

CONSTANT AIR FLOW CONTROL

Using the wire controller to set external
static pressure.
Settings for external static pressure can be
•
achieved by using the airflow automatic
adjustment function.
Airflow automatic adjustment is the volume of
•
blow-off air that has been automatically
adjusted to the rated quantity.
1. Make sure the test run is done with a dry coil.
If the coil is not dry, run the unit for 2 hours
with fan only to dry the coil.
2. Check if the power supply wiring to the air
conditioning unit is completed along with the
duct installation.
If a closing damper is installed in the air
conditioning unit, make sure that it is open.
Also check if the air filter is properly attached
into the air passage on the air suction side of
the air conditioning unit.
3. If there is more than one air inlet and outlet,
adjust the dampers so that the airflow rate of
each air inlet and outlet is conform with the
designed airflow rate. Make sure the air
conditioning unit is in fan operation mode.
Press and set the airflow adjustment button
on the remote controller to change the
airflow rate to H or L.
4. Setting the airflow automatic adjustment
settings. When the air conditioning unit is
off ,perform the next steps:
- Press the button "COPY" long,
- Press the button "+" or "-" to select the AF,
- Press the button "CONFIRM" .Then the air
conditioning unit will start the fan
operation for airflow automatic adjustment.
The ON mark will flash during
the fan operation for airflow
automatic adjustment.
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CAUTION
DO NOT adjust the dampers during fan
•
operation for airflow automatic adjustment.
After 3 to 6 minutes, the air conditioning unit
stops operating automatically when the fan
operation for airflow automatic adjustment
has been carried out.
CAUTION
If there is no change after airflow
•
adjustment in the ventilation paths, be sure
to perform setting the automatic airflow
adjustment again.
Contact your dealer if there is no change
•
after performing airflow adjustment in the
ventilation paths, after performing the test
operation of the outdoor unit or when the
air conditioning unit is moved to another
location.
If booster fans, an outdoor air processing
•
unit or HRV via duct are used, do not use
automatic airflow adjustment control with a
remote controller.
If the ventilation paths have been changed,
•
perform the setting of the airflow automatic
adjustment again as described above from
step 3 onwards.