Carrier 40MBDQ series, Installation Instructions Manual

Page: 12 / 26

12
EXTERNAL STATIC PRESSURE
Using the KSACN0501AAA Wired Controller, the external static
pressure can:
S
Be manually changed to the fan curves SP2, SP3, SP4.
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Choose the Automatic Airflow “AF” adjustment function which
will automatically identify the static pressure and regulate the
amount of airflow.
Follow instructions to configure:
1. Make sure the test run is done with a dry coil. If the coil is
not dry, run the unit for 2 hours in FAN ONLY mode to dry
the coil.
2. Check that both the power supply wiring and the duct
installation have been completed. Check that any closing
dampers are open. Check that the air filter is properly
attached to the air return side passage of the unit.
3. If there is more than one air inlet and/or outlet, adjust the
dampers so that the airflow rate of each air inlet and outlet
conforms with the designed airflow rate. Ensure the unit is
in FAN ONLY mode. Press and set the airflow adjustment
button on the remote control to change the airflow rate from
H or L. Turn the indoor unit OFF.
4. Set the parameters for airflow adjustment. When the system
is OFF, perform the following steps.
a. Press and hold COPY for approximately 4 seconds.
b. Press “+” or “−” to scroll through the menu and make a
selection, either SP or AF.
NOTE: T1, T2, T26, T3, T4 are sub−menus for
thermistors. Do not select for setting external static pressure.
Fig. 30 − Wired Controller Menu Selection
(1.) If setting the external static pressure manually,
select SP and press CONFIRM. Select the SP
number (SP1, SP2, SP3, SP4 − see static pressure
Table 6 and curves (Figs. 32 through 38)). Power
down the unit to lock in the selection.
(2.) If choosing the automatic airflow adjustment
function, select AF and press CONFIRM. The
system will start the fan for airflow automatic
adjustment. ON will flash when the fan is running
during the Automatic Airflow adjustment. After 3
to 6 minutes the system stops operating once the
automatic airflow adjustment has finished.
Fig. 31 − Automatic Airflow ON signal
CAUTION
!
DAMPERS
DO NOT adjust the dampers when the automatic airflow
adjustment is active.
CAUTION
AIRFLOW ADJUSTMENT
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If there is no charge after the airflow adjustment in the
ventilation paths, be sure to reset the automatic airflow
adjustment.
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If there is no charge to the ventilation paths after the airflow
adjustment, contact your dealer, especially if this occurs
after testing the outdoor unit or if the unit has been moved
to a different location.
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Do not use the automatic airflow adjustment with the
remote control, if you are using booster fans, outdoor air
processing unit, or a HRV via duct.
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If the ventilation paths have been changes, reset airflow
automatic adjustment as described from step 3 onwards.
!
CAUTION