Trane FD145CLFR000D Installation Operation & Maintenance page 13

ELECTRICAL CONNECTIONS TO A COMMUNICATING FURNACE IN 24 V MODE
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!
HAZARDOUS VOLTAGE! DISCONNECT ALL ELECTRIC
POWER, INCLUDING REMOTE DISCONNECTS BEFORE
SERVICING. FOLLOW PROPER LOCKOUT/TAGOUT
PROCEDURES TO ENSURE THE POWER CAN NOT BE
INADVERTENTLY ENERGIZED. FAILURE TO DISCONNECT
POWER BEFORE SERVICING COULD RESULT IN DEATH
OR SERIOUS INJURY.
PROCEDURE:
1. Remove electrical power going into the furnace.
2. Remove blower door to up-flow or down-flow furnace.
3. Remove the two screws that secure the IFC platform to the
underside of the blower deck on an up-flow furnace or the 3
screws that secure the IFC platform to the top panel on a
down-flow furnace.
4. Carefully remove the IFC platform from the furnace.
5. On both the up-flow and down-flow furnaces, mount the 50VA
transformer supplied in the packaging with the air cleaner
onto the bottom of the IFC platform. Screws and pilot holes
are provided. See figure.
6. Remove wiring from existing 35VA transformer and reconnect
to the 50VA transformer. Note the polarity of the wires and
reconnect to the appropriate terminals. See diagram
7. Remove the EAC-H 115VAC and EAC-N wires (white and
black) out of the junction box and pull them through the
grommet in the blower deck. Attach two supplied ¼" insulated
female quick connect terminals by stripping the wires and
crimping the terminals onto the wires. Attach these wires to
the 115V terminals of the 35VA transformer as shown in the
diagram.
8. Remove the wiring harness supplied with the air cleaner from
the packaging. Attach a supplied 3/16" insulated female quick
connect terminal to the blue wire and the green wire.
BILL OF MATERIALS:
QTY: 2 Screw
QTY: 1 4" Insulated Copper Wire –
Blue (18 AWG, AWM)
QTY: 2 1/4" Insulated Female Quick
Connect Terminal
QTY: 2 3/16" x 0.020" Insulated Female
Quick Connect Terminal
QTY: 1 3/16" x 0.020" Receptacle & Tab
Pub. No. 18-HE53D1-11
WARNING
These instructions and listed parts are included in KIT# BAYACCECOMM101
Numbers in [brackets] are for 50 Hz international systems.
Installer's Guide
9. Attach the blue wire from the air cleaner wiring harness to the
open tab on the piggyback terminal supplied in the
BAYACCECOMM101. Attach piggyback terminal to the 35VA
transformer terminal "C" (Common).
10. Insert the 12" blue stripped wire under the terminal strip
screw marked "B/C" on the IFC control board. If the applica-
tion also includes an outdoor unit (communicating or non-
communicating), the B/C terminal will require 3 wires
connected. For this connection, rather than connecting the
three wires to the low voltage terminal strip on the furnace
IFC, create a pigtail using a short length of thermostat wire
and a wire nut (field supplied) to attach to the B/C terminal.
11. Connect the green wire from the air cleaner wiring harness to
the 24V terminal on the 35VA transformer labeled "RD". See
diagram.
12. Insert the red stripped wire from the air cleaner wiring
harness under the IFC control board terminal screw marked
"R". See diagram.
13. Attach the black stripped wire from the air cleaner wiring
harness directly to ground with a screw on the furnace
chassis. See diagram.
14. Once all of the connections have been completed, remount
the IFC control platform into the furnace.
15. Secure any loose wiring with wire ties.
16. The brown and white wires from the EAC wiring harness are
unused in this application and should be insulated. See
diagram.
17. Replace the furnace door.
18. Reconnect electrical power to the furnace.
19. Check both furnace and air cleaner operation per the furnace
and air cleaner installer guides.
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