AAON F1-060, Installation, Operation & Maintenance Manual, Page: 18 / 56

18
ECM Driven Fan
The Electrically Commutated Motor (ECM)
has selectable fan speeds as determined by
the configuration of four pins as shown in
FIGURE 2.
Figure 2 - Example Configuration of ECM
Fan Taps
Adjust the taps as desired for cooling,
dehumidification, and heating according to
the following instructions.
Cooling:
Units are preprogrammed from the factory
for a rated airflow rate of 400 cfm per ton as
shown in Table 3.
Table 3 - Factory Preset Air Flow
Model Preset cfm
F1-060 2000
F1-048 1600
F1-036 1200
F1-024 800
* Maximum total static is 2.25” w.g.
The
high speed for cooling may be selected
by setting the COOL and ADJUST fan
speed taps (shown in Figure 2). The setting
combinations are shown in Table 4.
Note: On the ADJUST tap, both of the ‘1’
selections have the same effect on motor
speed.
Table 4 - Cooling Fan Speed Tap Settings
F1-060/ F1-036/
COOL
Tap
ADJUST
Tap
F1-048 F1-024
(cfm) (cfm)
2000 1200 A 1
2000 1200 D 1
1840 1150 B +
1700 1020 A -
1700 1020 D -
1600 1000 B 1
1380 920 C +
1360 850 B -
1200 800 C 1
1020 680 C -
A signal from the thermostat, showing a
need for dehumidification, will cause the
unit to slow the fan speed in order to allow
the air moving across the coil to get colder
thereby better dehumidifying the air. Fist
stage dehumidification has a low fan speed
of 67% of the selected max speed. Second
stage dehumidification has a fan speed of
45% of the selected max speed. NOTE: The
Modulating Hot Gas Reheat option must be
selected to have a second stage of
dehumidification.
In this comfort cooling application of the
ECM fan motor, heat and cool taps, A & D
have the same effect on motor speed.
Humidity Control:
Adjust the DELAY tap for humidity control
that is suitable for the climate according to
Table 5.
Table 5 - Climate Settings
CLIMATE DELAY Tap
Humid A
Sub-humid/Dry B
Semi-Arid C
Arid/Hyper-Arid D
A
----
A - - 1 - - A
----
B - - B - - + - - B - -
C - - C - - -
----
C - -
D - - D
----
1 - - D - -
HEAT COOL ADJUST DELAY