Manual 2100-692
Page
33 of 40
TABLE 13
Recommended Airflow
FIGURE 26
Speed Taps
Speed Tap 1: Vent Speed
Speed Tap 2: Balanced Climate Speed
Speed Tap 3: Default Speed
Speed Tap 4: Medium Speed
Speed Tap 5: High Speed
Manual
2100-467H
Page
23 of 23
FIGURE 11
TROUBLESHOOTING GE X13-SERIES ECM2.3
™
MOTORS
CONT’D.
Model X13 Communication Diagnostics
The X13 motor is communicated through 24 VAC low voltage
(Thermostat Control Circuit Wiring).
1.
Start with unit wiring diagram to confirm proper
connections and voltage (see Figure 11).
2. Initiate a demand from the thermostat and check the
voltage between the common and the appropriate motor
terminal (1-5). ("G" input is typically on terminal #1, but
refer to wiring diagram!)
a. If the low voltage communication is not present, check
the demand from the thermostat. Also check the
output terminal and wire(s) from the terminal strip or
control relay(s) to the motor.
b. If the motor has proper high voltage as identified
above (Motor not Running #1), and proper low voltage
to a programmed terminal, and is not operating, the
motor is failed, and will require replacement.
24VAC "R" Sig nal thro ug h
thermo stat o utp ut.
24VAC Co mmo n
24VAC Co mmo n
24VAC "R" Sig nal thro ug h
thermo stat o utp ut.
24VAC Common
24VAC "R"
signal through
thermostat output
Model
Nominal
Rated
CFM*
Nominal
Rated
ESP*
Recommended
Airflow Range
Factory
Speed
Connection
W42AC
1350
.15
1250 - 1600
Default
W48AC
1550
.20
1450 - 1750
W60AC
1750
.20
1650 - 2000
W72AC
1900
.25
1800 - 2100
* Rated CFM and ESP on factory speed connection.
Setting Unit Airflow
The unit is set from the factory at the default speed.
Most units have three selectable cooling speed taps
that can be utilized. The default speed is the lowest
cooling speed. The two higher speed taps can be used
for higher duct static applications so that the unit can
maintain the recommended airflow as shown in Table
13. The higher speeds can also be used when higher
sensible cooling is desired. To change to the higher
speed taps, move the orange/black wire on the blower
speed terminal block to either MED or HI. Refer to
Table 15 on page 35 for the corresponding airflow of
each tap. Set the unit duct static based on the highest
airflow that the unit will run at.
NOTE:
Be sure to adjust the system static or
blower speed to maintain airflows above the
minimum recommendations to prevent freeze
up conditions if Balanced Climate mode is
activated.
Do not operate the unit in Balanced Climate mode
if running high static applications as indicated in
the blower performance table. If Balanced Climate
mode is activated as described on page 18, the unit
will run in this mode at all times unless there is a
call for ventilation, electric heat or 2nd stage cooling
from a 2-stage thermostat. At that time, the unit will
automatically activate a higher speed tap.
Blower Speeds
The ECM motor blower speeds are communicated
through 24VAC low voltage signals from the low voltage
terminal block inside the control panel area to speed
taps. Each speed tap is programmed by Bard at the
factory to different motor torque settings (see Figure 26).
Unit
Operation
Thermostat Inputs – 24VAC
Speed Taps
Blower Speed
Compressor
Operation
G
Y1
Y2 W1 W2
A
D
1
2
3-4-5
1
Blower Only
X
X
Vent/Blower Only
Off
Balanced Climate Cooling
X
X
X
X
Balanced Climate
On
Full Load Cool
X
X
X
X
X
X
Lo/Med/Hi
On
1st Stage Heat
X
X
Lo/Med/Hi
Off
2nd Stage Heat
X
X
X
Lo/Med/Hi
Off
Dehumidify
2
X
X
X
Balanced Climate
On
¹
Fan speed is selectable through the blower speed control terminal block. LO (default), MED or HI speeds can be used.
2
Dehumidification operation is disabled when a call for heating or cooling occurs. Unit runs at Balanced Climate speed
during dehumidification operation.
TABLE 14
Blower Speeds for Unit Operational Modes
Five factory programmed speed taps (torque settings)
are available for the motor, and are selected through
different unit modes of operation. These modes are
energized by 24VAC signals from the low voltage
terminal block located inside the control panel by a
thermostat or other controlling device.
Multiple motor speed taps may be energized
simultaneously by 24VAC power during different modes
of operation. The highest number speed tap energized
takes priority with 5 being the highest and 1 being
the lowest. See Table 14 for the corresponding blower
speeds with the different modes of operation.
