10
Numbers in [brackets] are for 50 Hz international systems.
Pub. No. 18-HE53D1-7
Installer’s Guide
ELECTRICAL CONNECTIONS TO A COMMUNICATING SYSTEMS 3-STAGE FURNACE
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
▲
WARNING
!
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.
Open blower door to upflow or downflow furnace.
3.
Remove the two screws that secure the IFC platform to the
underside of the blower deck on an upflow furnace or the
three screws that secure the IFC to the top panel on a
downflow furneace. Save these screws for remounting later.
4.
Remove the IFC and platform from the upflow or downflow
furnace.
5.
Disconnect all wires on the 35VA transformer.
6.
Remove the 35VA transformer from the IFC platform. Save the
screws for 35VA transformer relocation.
7.
Mount the 50 VA transformer supplied in the packaging with
the air cleaner onto the IFC platform where the 35VA
transformer was previously located. Use the sheet metal
screws supplied with the air cleaner to mount the 50VA
transformer. Re-connect the 115V and 24V wires that were
connected to the 35VA transformer onto the 50 VA
transformer.
8.
On an upflow furnace, remount the 35VA transformer onto
the underside of the IFC platform. Use existing holes and the
original sheet metal screws that originally mounted the 35VA
transformer. See diagram.
9.
On a downflow furnace, mount the 35 VA transformer on the
blower deck by drilling two 0.144 inch diameter (#27) holes
13/16" inches apart and attaching the transformer to the
blower deck using the screws retained from step 3 above.
10. Remove the EAC-H 115VAC & EAC-N wires (white and black)
out of the junction box and pull them through the grommet in
the blower deck. Attach two supplied 1/4” 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.
11. Connect the terminal to the 24V terminal on the 35VA
transformer.
12. 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 to the green wire.
13. Attach the blue wire from the air cleaner wiring harness to the
open tab on the piggyback terminal.
14. Insert the 4” blue stripped wire under the terminal strip screw
marked “B/C” on the IFC control board.If the application also
includes an outdoor unit (communicating or non-
communicating), the B/C terminal will require three wires.
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.
15. Connect the green wire from the air cleaner wire harness to
the 24VA terminals of the 35VA transformer terminal as
shown in the diagram (this terminal is labeled “RD” on the
tranformer).
16. Insert the red stripped wire from the air cleaner wiring
harness under the terminal strip screw marked “R” on the IFC
Control board.
17. Attach the black stripped wire from the air cleaner wiring
harness directly to ground with a screw in the chassis.
18. Once all of the connections have been completed, remount
the IFC Control Platform into the furnace.
19. Secure the loose EAC-H 115VAC & EAC-N (black and white)
120VAC wires with wire ties so that they are not dangling in
the furnace.
20. The brown and white wires on the air cleaning wiring
harness are unused in this application and should be
insulated.
21. Replace door on furnace.
22. Re-connect electrical power to the furnace.
23. Check both furnace and air cleaner operation per the furnace
and air cleaner installer guides.
These instructions and
listed parts are included in
KIT# BAYACCECOMM101
