Airflow Adjustment - Trane 2TEE3F39A1000A Installer's Manual

J.

AIRFLOW ADJUSTMENT

▲
!
Disconnect power to the air handler before changing
dip switch positions. Failure to follow this procedure
may result in equipment damage.
Blower speed changes are made on the ECM Fan Con-
trol mounted on the control box. The ECM Fan Control
controls the variable speed motor.
There is a bank of 8 dip switches (See Figure 20). The
dip switches work in pairs to match the airflow for the
outdoor unit size (tons), cooling airflow adjustment, Fan
off-delay options, and heating airflow adjustment. The
switches appear as shown in Figure 21.
ECM FAN CONTROL
CFM
SELECTION
LIGHT
Figure 21
COOLING
DIP SWITCHES (AS SHIPPED)
If the airflow needs to be increased or decreased, see
the Airflow Label on the air handler or the Blower Per-
formance Table in the Service Facts. Information on
changing the speed of the blower motor for your specific
outdoor model size is in the Blower Performance Table.
Be sure to set the airflow for the correct tonnage.
Refer to blower housing for correct setting.
Switches 1 - 4 Cooling Airflow
Switches 5 - 6 Fan Off Delay Options
Switches 7 - 8 Auxiliary Heat
If the optional humidistat is used, remove R-BK jumper
from the low voltage terminal board (not shown) and in-
stall the humidistat between R and BK. (Jumper R to O
for cooling-only/non-heat pump systems with a humidis-
tat.)
CAUTION
Figure 20
DIP
SWITCHES
From Dwg. 800796a
HEATING
FAN OFF AUXILIARY
DELAY HEAT SPEEDS
AIRFLOW
INDOOR BLOWER TIMING
IMPORTANT:
Leave dip switch 5 & 6 in the "as-shipped" position
during system start-up and check out. Afterwards, ad-
just as desired.
The FAN-OFF period is set on the ECM Fan Control
board by dip switches #5 and #6. The blower off-delay
settings are as follows:
COOLING OFF - DELAY OPTIONS
SWITCH SETTINGS
5 - OFF 6 - OFF
5 - ON 6 - OFF
5 - OFF 6 - ON
5 - ON 6 - ON
** - This ENHANCED MODE selection provides a ramping
up and ramping down of the blower speed to provide
improved comfort, quietness, and potential energy savings.
The graph shows the ramping process.
80%
Dehumidify
50%
Fast Coil Cooling
and Heating
OFF
1
7.5
minute
minutes
COMPRESSOR OPERATION ON
NOTE: Direct drive motors have bearings which are
permanently lubricated and under normal use lubrica-
tion is not recommended.
K. CHECKOUT PROCEDURE
1. Check the Air Handler installation in accordance
with the instructions on page 16.
2. "Operational Procedure" for the system installation
can be found in the outdoor unit installer guide and will
be compatible with this Air Handler.
NOMINAL
SELECTION
AIRFLOW
NONE SAME
1.5 MINUTES 100% *
3 MINUTES 50%
ENHANCED** 50 - 100%
100% if necessary
Efficiency
as required
3
minutes
OFF
50%
OFF