Trane BCHE Installation, Operation And Maintenance Manual page 94

ECM Overview and Setup
VSP Setup Examples
Figure 94. Example 1: V V f f l l r r set too high and A A i i S S c c set
too high
Figure 95. Example 2: V V f f l l r r set too high but A A i i S S c c set
correctly
Figure 96. Example 3: V V f f l l r r set correctly and A A i i S S c c set
correctly
94
Potentiometer/Rheostat For VSP
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious
injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by
Trane or others, refer to the appropriate
manufacturer's literature for allowable waiting periods
for discharge of capacitors. Verify with a CAT III or IV
voltmeter rated per NFPA 70E that all capacitors have
discharged.
WARNING
Safety Alert!
Failure to follow instructions below could result in
death or serious injury.
In addition to the following tasks, you MUST:
• Follow all instructions in the unit's Installation,
Operation, and Maintenance manual, including
warnings, cautions, and notices.
• Perform all required tasks in any applicable
Service Alerts and Service Bulletins.
• Review and understand all information provided
in Submittals and Design Specifications.
A courtesy 10 VDC supply is provided that can support a
10mA draw. The use of a 1K or a 10K potentiometer is
recommended, and only a stand-alone potentiometer (not
shared with any other electrical system) should be
employed. When a simple potentiometer is used as
depicted in the following figure, the V V f f l l r r setting will define
a null-zone (off).
The typical connection is depicted in the following figure;
however, please consult the unit schematic for the most
updated instruction, as this is provided as reference only.
BCX-SVX002A-EN