GSX14 Service Manual

SERVICING
114
4. Locate the blower speed selection DIP switches on the
integrated control module. Select the desired “cooling”
speed tap by positioning switches 1 and 2 appropri-
ately. If airflow adjustment is required, set dip switch
S8 (trim enable) to ON (trim enable default is off). Then
select the desired “adjust” tap by positioning switches
S3 and S4 appropriately. Refer to the following
Dipswitches - Cooling Airflow and Airflow Adjust Taps
figure for switch positions and their corresponding
taps. Verify CFM by counting the number of times the
green CFM LED blinks.
1
2
1
2
1
2
1
2
OFF OFF OFF OFFON ON ON ON
Tap A Tap B
Cooling Air flow Speed Tap (*indicates factory setting)
Tap C Tap D*
3
4
OFF OFF OFF OFFON ON ON ON
+5% -5%
Air flow Adjust Taps (*indicates factory setting)
+10% -10%
3
4
3
4
3
4
Dip Switches - Cooling Airflow and Airflow
Adjust Taps
5. Continuous fan speeds that provide 25, 50, 75, and 100%
of the furnace’s maximum airflow capability are select-
able via dip switches S12 and S13.
If the furnace’s maximum airflow capability is 2000 CFM
and 25% continuous fan speed is selected, the continu-
ous fan speed will be 0.25 x 2000 CFM = 500 CFM.
12
13
12
13
12
13
12
13
OFF
OFF
OFF
OFFON
ON
ON ON
25% 50%*
Fan Only Selection (*indicates factory setting)
75% 100%
12
13
12
13
12
13
12
13
OFF
OFF
OFF
OFFON
ON
ON ON
Fan Only Selection (*indicates factory setting)
6. The multi-speed circulator blower also offers several
custom ON/OFF ramping profiles. These profiles may be
used to enhance cooling performance and increase
comfort level. The ramping profiles are selected using
DIP switches 5 and 6. Refer to the following Dipswitches
- Cooling Airflow Ramping Profiles figure for switch
positions and their corresponding taps. Refer to the bullet
points below for a description of each ramping profile.
Verify profile selection by counting the green CFM LED
blinks and timing each step of the ramping profile.
NOTE: Upon start up in communicating mode the circuit board may display an “Ec” error. This is an indication that the
dip switches on the control board need to be configured in accordance with the Electric Heating Airflow Table. Configuring
the dip switches and resetting power to the unit will clear the error code.
Within the thermostat user menu, CTK0* communicating thermostat will display 20 kW for OFF-OFF-ON dip switch selection
and 21 kW for OFF-OFF-OFF dip switch selection.