Filter
Top Products
39
for Low Speed or High Speed cooling. See Table 5--Air
Delivery -- CFM (With Filter ). Depending on the model
size, the cooling airflow can be adjusted from 1. tons nom-
inal cooling to 3 ., to 4 or to 6 tons of nominal cooling
based on 350 cfm ton.
The cooling airflow is adjusted by turning Setup switches
SW2--1, SW2--2 and SW2--3 either ON or OFF. Select the
required airflow from Fig. 57. Fig. 57 is based on 350
CFM per ton. For airflow at 400 CFM per ton, turn Setup
SW1--5 ON (See Table 10 and Fig. 26 and 53.)
NOTE: 6 ton airflow will truncate at 2200 cfm on applicable
models. For a complete explanation of cooling airflow, refer to
the section titled “Sequence of Operation.”
10. Set Airflow For Continuous Fan/Low Speed Cooling Air-
flow The ECM blower motor can be adjusted for continu-
ous fan speeds different than heating or cooling fan speed.
See Table 5 -- Air Delivery -- CFM (With Filter). Select the
required continuous fan airflow from Fig. 57.
The continuous fan speed is also the fan speed for low
speed cooling when furnace is used with a 2--speed cool-
ing unit. Adjust the Continuous Fan CFM to match the
airflow required for low speed cooling. Select the required
airflow from Fig. 55. For airflow at 400 CFM per ton, turn
Setup SW1--5 ON (See Fig. 57.) The airflow selected for
low speed cooling will also be the airflow used for con-
tinuous fan.
The continuous fan speed can be further adjusted at the
thermostat using the “Comfort Fan” select function.
Changing the continuous fan speed at the thermostat
DOES NOT change the low speed cooling airflow selec-
ted at the control board.
315AAV