CAUTION:
Be sure all incoming power is off before
beginning any procedures.
A.
Internal Electrical Connections
Proceed as follows to make internal electrical connections.
1. With power door removed, remove junction box cover
adjacent to female plug on casing upper channel. (See Fig.
10.)
2. Install protective bushing from inside the air cleaner into the
upper hole on the side channel adjacent to the furnace. Be
sure bushing projects into furnace opening protecting wires
from sharp edges on cabinet opening.
3. Install protective bushing through top rail as shown in Fig.
10.
4. Plug unused hole on top of unit with plug provided in parts
bag.
5. Route power wires through bushing channel at top of
cabinet, down side channel, and through bushing in side
channel and into furnace opening. (See Fig. 10.)
6. Replace cover of junction box.
7. Install wire cover (provided in parts bag) under top flange
and secure to side channel with provided screw.
8. Connect power leads as follows:
a. Single Speed Furnaces—EAC is wired in parallel with
fan motor. (See Fig. 11.)
b. Multispeed Direct-Drive Motor—If the EAC is wired
to a multispeed direct-drive motor, it must be isolated by
a relay or sail switch. Use either air cleaner relay P/N
P283-1203 or sail switch P/N 69105D1. (See Fig. 12 or
13.)
c. Furnaces with Printed-Circuit Boards—EAC is wired
to furnace terminals EAC 1 and EAC 2. See Fig. 14 for
wiring connections.
9. Connect ground wire to base unit ground.
Fig. 5—Opening Detail
A91471
18
5
⁄
8
″
17
1
⁄
4
″
16
1
⁄
4
″
3
1
⁄
4
″
2
3
⁄
4
″
2
7
⁄
16
″
1
3
⁄
4
″
0
0
4
1
⁄
4
″
5
3
⁄
4
″
5
1
⁄
16
″
25
″
28
1
⁄
2
″
REAR OF
FURNACE
REAR OF
FURNACE
REAR OF
FURNACE
1
⁄
8
IN.
DIA HOLE
FURNACE
KNOCKOUTS
1
⁄
8
IN.
DIA HOLE
18
5
⁄
8
″
17
1
⁄
4
″
16
1
⁄
4
″
3
1
⁄
4
″
2
3
⁄
4
″
2
7
⁄
16
″
1
3
⁄
4
″
0
0
4
1
⁄
4
″
5
3
⁄
4
″
5
1
⁄
16
″
28
1
⁄
2
″
1
⁄
8
IN.
DIA HOLE
FURNACE
KNOCKOUTS
27
1
⁄
2
″
28
1
⁄
2
″
27
1
⁄
2
″
1
5
⁄
16
″
0
0
13
⁄
16
″
1
3
⁄
4
″
2
7
⁄
16
″
2
3
⁄
4
″
10
1
⁄
2
″
15
5
⁄
8
″
17
1
⁄
4
″
18
5
⁄
8
″
16
1
⁄
4
″
020
1
⁄
8
IN.
DIA HOLE
FURNACE
KNOCKOUTS
016
012
1
⁄
8
IN.
DIA HOLE
1
⁄
8
IN.
DIA HOLE
3
⁄
4
IN.
DIA HOLE
Fig. 6—Electronic Air Cleaner Installation
A89117
PLUG
FLANGE
FURNACE
OPENING
SCREWS
BUSHINGS
SCREWS
SCREWS
Fig. 7—Installing Baffles if Needed
A91472
BAFFLES
FURNACE
ELECTRONIC
AIR CLEANER
—5—
