10
18-GE06D1-4
Installer’s Guide
COOLING OFF - DELAY OPTIONS
SWITCH SETTINGS
SELECTION
NOMINAL
AIRFLOW
5 - OFF
6 - OFF
NONE
SAME
5 - ON
6 - OFF
1.5 MINUTES
100% *
5 - OFF
6 - ON
3 MINUTES
50%
5 - ON
6 - ON
ENHANCED**
50 - 100%
* - This setting is equivalent to the BAY24X045 relay benefit.
** - 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.
OFF
OFF
50%
80%
100% if necessary
50%
Dehumidify
Fast Coil Cooling
and Heating
Efficiency
7.5
minutes
3
minutes
1
minute
FAN OPERATION (CFM)
COMPRESSOR OPERATION ON
OFF
as required
J. AIRFLOW ADJUSTMENT
▲
CAUTION
!
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 17). 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 18.
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.)
INDOOR BLOWER TIMING
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:
IMPORTANT:
Leave dip switch 5 & 6 in the "as-shipped" position
during system start-up and check out. Afterwards, ad-
just as desired.
DIP SWITCHES (AS SHIPPED)
COOLING
HEATING
AIRFLOW
FAN OFF
DELAY
AUXILIARY
HEAT SPEEDS
Figure 18
From Dwg. 800796a
CFM
SELECTION
LIGHT
DIP
SWITCHES
ECM FAN CONTROL
Figure 17
