Trane Precedent FIAEHTB309 Series Installation Instructions Manual page 13

16. Install the heater terminal block plate to the unit base rail
and heater control panel.
Figure 18. Terminal plate mounting
17. Connect the heater element wire harness(es) to the
contactors.
18. Connect the wire harness from the terminal block to the
bottom side of the heater fuse blocks. Pay close attention
to the proper L1/L2/L3 connections for each circuit and
wire number (for heater 1A, 1B, 2A or 2B).
19. Connect the wire harness from the terminal block to the
main power fuse block.
20. Route wires from Fuse 6-8 (control box fusing) up through
top opening in heater directly into closest opening in main
control box. Route wire across lower section of main
control box to HTB1. Refer to unit level device location
sheet for HTB1 location. Be sure pressure lugs on HTB1
are torqued to spec. Refer to label on side of HTB1 for the
proper torque based on wire gauge being installed.
21. Connect control harness to connectors on the electric heat
contactors and route harness to the main control box.
a. Refer to Figure 19 for indoor option module location.
Wire control voltage harnesses from contactors to
indoor options module. Stage 1 to J6 and Stage 2 (if
installed) to J7.
b. Refer to schematic for electrical connections. Harness
routes out of upper opening in heat assembly then
directly into the lower left opening in main control box.
Fresh air module is located on left side low voltage door.
Route harness through the U-shaped opening located
in lower left corner of low voltage door and use wire ties
already installed.
22. Install the bulkhead post.
ACC-SVN228B-EN
SCREWS
Figure 19. Indoor options access
23. Install lower TBUE panel to the base.
Figure 20. Lower TBUE panel
24. Install the heater door assembly. Mount the bracket on the
bottom rail with two screws so the schematic labels are on
the inside of the door facing the heater control panel and
the warning label is facing out.
Figure 21. Hinged access door mounting
25. Install the four screws that secure the heat section access
panel to close access to the electric heat section.
26. Scratch out the square on unit nameplate showing heater
model installed in unit.
Installation
SCREWS
SCREWS
13