Psc Blower Motor Speed Retrofit; Ecm Cfm Settings - Trane Axiom GET024-036 Installation, Operation And Maintenance Manual

Installation
Table 10. Deluxe controller diagnostic LEDs (continued)
Color: Green Color: Red
LED1 LED2
ON FLASH
ON ON

PSC Blower Motor Speed Retrofit

PSC motors installed in the unit have multiple speed
configurations. To modify the rpm of the motor, the following
steps may be followed.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is present
with a voltmeter.
1. Locate the blower motor relay inside the chassis control
box.
2. Remove the undesired speed tap.
3. Select desired speed tap wire by using information from
Table 11, p. 20.
4. Connect desired tap wire to the 1K4 relay at spade 4.
5. Reconnect power to the unit.
Table 11. Lead change
Lead Colors
Lead Speed High
Blower
1G

ECM CFM Settings

To adjust the CFM, disconnect the power to the unit. Set the
DIP switch located in the control box to the desired profile
setting. Connect the power to the unit.
20
Controller Mode
LED3
Manual Lockout (condensate
OFF
overflow)
OFF Compressor Disable
Low
9A
Figure 18. Units with Deluxe 24V or Tracer
controls and ECM motors – DIP switch
settings
Note: Units with the optional ECM with deluxe 24V or
Tracer® ZN510 controls are shipped from the factory
on Profile B.
• Profile A = 110% of rated airflow
• Profile B = 100% of rated airflow
• Profile C = 90% of rated airflow
• Profile D = 80% of rated airflow
Installation at higher altitudes may require an adjustment to the
fan speed setting to achieve proper airflow. Use profile C or D
to get lower airflow. If a lower CFM is needed, then set DIP
switch 4 to ON.
®
ZN510
WSHP-SVX10H-EN