Trane RTHD Installation Instructions Manual page 34

Installation
1. Remove and discard high-fault bracing.
WARNING
Backup Wrench Required!
Failure to follow instructions below could result in
death or serious injury. Use backup wrench to prevent
twisting/stress on motor terminals when installing and
removing wire or buss bars from terminals and inspect
terminals to ensure that they are not damaged. Motor
terminals are ceramic and, if cracked, could create an
electrical hazard when power is restored.
2. Remove and discard power wire from breaker/terminal,
contactors, and motor terminals.
Note: Be sure to save motor terminal nuts for installation.
Figure 33. Use backup wrench when removing wire or
buss bars from motor terminals
3. Remove and discard 1F1/2/3 line side harness.
4. Remove and discard contactors: 1K1, 1K2, 1K3, and 1K4.
5. Remove and discard resistors: 1R1, 1R2, and 1R3.
6. Remove and discard current transformers: 1T2-1, 1T2-2,
and 1T-31.
7. Remove and discard (if applicable) under/over voltage
transformers: T3-1, 1T3-2, and 1T3-1.
8. Remove and discard terminals 1X3.
9. Remove and save Fuse 1F1/2/3 for later use; refer to
Figure 34 and Figure 38.
Note: This fuse will be rated at 5 amps (380 to 415 volts)
and 4 amps (460 volts).
10. Remove starter module 1A3.
Note: The liquid level red power wire (64A) is connected
to J3 Pin 1 of the starter module. This will be
connected to the power supply 1A2. Refer to
"Panel Control Wiring," p.
34
47.
Figure 34. Starter module location
Starter
Module
Terminals
1X3
Fuse
1F1/2/3
SO-SVN048A-EN