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Carrier WEATHERMAKER 8000 58ZAV User Manual

Page 7

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Do not install furnace on its back. Safety control operation
will be adversely affected. Never connect return-air ducts to
back of furnace. Failure to follow this warning could result in
fire, personal injury, or death.

Step 5—Downflow Installation
NOTE:
This furnace is approved for use on combustible materials
or wood flooring. A factory accessory floor base, as listed on the
furnace rating plate, MUST be used. A factory accessory floor
base is not required when this furnace is installed on manufactur-
er’s Coil Assembly Part No. CD5 or CK5, or Coil Box Part No.
KCAKC is used.

1. Determine application being installed from Table 3.
2. Construct hole in floor per dimensions specified in Table 3

and Fig. 5.

3. Construct plenum to dimensions specified in Table 3.
4. If downflow subbase (KGASB) is used, install as shown in

Fig. 6.

Table 3—Opening Dimensions (In.)

FURNACE

CASING

WIDTH

APPLICATION

PLENUM OPENING

FLOOR OPENING

A

B

C

D

14-3/16

Non-Combustible Flooring

12-11/16

19

13-3/8

19-5/8

Combustible Flooring Using KGASB Subbase

11-13/16

19

13-7/16

20-3/8

Combustible Flooring with CD5 or CK5 Coil Assembly or

KCAKC Coil Box

12-5/16

19

13-5/16

20

17-1/2

Non-Combustible Flooring

16

19

16-5/8

19-5/8

Combustible Flooring Using KGASB Subbase

15-1/8

19

16-3/4

20-3/8

Combustible Flooring with CD5 or CK5 Coil Assembly or

KCAKC Coil Box

15-1/2

19

16-1/2

20

21

Non-Combustible Flooring

19-1/2

19

20-1/8

19-5/8

Combustible Flooring Using KGASB Subbase

18-5/8

19

20-1/4

20-3/8

Combustible Flooring with CD5 or CK5 Coil Assembly or

KCAKC Coil Box

19

19

20

20

24-1/2

Non-Combustible Flooring

23

19

23-5/8

19-5/8

Combustible Flooring Using KGASB Subbase

22-1/8

19

23-3/4

20-3/8

Combustible Flooring with CD5 or CK5 Coil Assembly or

KCAKC Coil Box

22-1/2

19

23-1/2

20

Fig. 5—Floor and Plenum Opening Dimensions

A96283

PLENUM

OPENING

C

A

B

D

FLOOR

OPENING

A93043

FRONT

BACK

FRONT

B

A

C

K

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