Technical Information

BLOWER PERFORMANCE SPECIFICATIONS

1. Units are shipped without filter(s). CFM in chart is without filter(s).

2. All furnaces shipped with heating speed set at "B" and cooling speed set at "D". Installer should adjust blower speed

as needed. The first task is to determine the proper aiflow for the cooling system.

3. For most cooling applications, about 400 CFM per ton is desirable.

4. The chart is for information only. For satisfactory operation, external static pressure not to exceed value shown on

rating plate.

5. Do not operate above 0.5" w.c. ESP in heating mode. Operating between 0.5" w.c. and 0.8" w.c. is tabulated for cooling

purposes only.

6. * Motor CFM maximum.

Note: 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 figure for switch positions

and their corresponding taps. Refer to the bullet points below

for a description of each ramping profile. Verify CFM by

noting the number displayed on the dual 7-segment LED

display.

A* OFF OFF

BONOFF

COFFON

DONON

Switch Bank: S4

DIP Switch No.

(*Indicates factory setting)

Ramping

Profiles

Ramping Profile

OFF

100% CFM 100% CFM

1 min

OFF

Profile A: provides only an OFF delay of one (1) minute at

100% of the cooling demand airflow.

50% CFM

1/2 min

100% CFM

1 min

OFF

Profile B: ramps up to full cooling demand airflow by first

stepping up to 50% of the full demand for 30 seconds. The

motor then ramps to 100% of the required airflow. A one (1)

minute OFF delay at 100% of the cooling airflow is provided.