Carrier 48TJD Specifications download pdf (Page 9)

Step 3 -- Field Fabricate Ductwork -- Secure all

ducts to building structure. Use flexible duct connectors be-

tween unit and ducts as required. Insulate and weatherproof all

external ductwork, joints, and roof openings with counter

flashing and mastic in accordance with applicable codes.

Ducts passing through an unconditioned space must be in-

sulated and covered with a vapor barrie];

Step 4 -- Make Unit Duct Connections -- Unit

is shipped for thru-the-bottonl duct connections. Ductwork

openings are shown in Fig. 1, 4, and 5. Duct connections are

shown in Fig. 6. Field-fabricated concentric ductwork may be

connected as shown in Fig. 7 and 8. Attach all ductwork to roof

curb and roof CUlb basepans.

Step 5 -- Install Flue Hood and Wind Baffle --

Flue hood and wind baffle are shipped secured under main

control box. To install, secure flue hood to access panel. See

Fig. 9. The wind baffle is then installed over the flue hood.

NOTE: When properly installed, flue hood will line up with

combustion fan housing. See Fig. 10.

Step 6 -- Trap Condensate Drain -- See Fig, 11

for drain location. One 3/4-in. half coupling is provided inside

unit evaporator section for condensate drain connection. An

81/2-in. x 3/4-in. diameter and 2-in. x 3/4-in. diameter pipe nip-

ple, coupled to standard 3/4-in. diameter elbows, provide a

straight path down through hole in unit base rails (see Fig. 12).

A trap at least 4-in. deep must be used.

HEAT

SEE NOTE

[_AIR

OUT

NOTE: Do not drill in this area; damage to basepan may result in

water leak.

Fig. 6 -- Air Distribution -- Thru-the-Bottom

I'-O1

24"MIN.

BAFFLE

NOTE: Dimensions A, A', and B' are obtained from field-supplied

ceiling diffuser.

Shaded area indicates block-off panels.

Fig. 8- Concentric Duct Details

NOTE

SEE NOTE

AIR OUT AIR IN AIR OUT

NOTE: Do not drill in this area; damage to basepan may result in

water leak.

Fig. 7 -- Concentric Duct Air Distribution

WIND

BAFFLE

FLUE

HOOD

\ ii

,.ii

/ \

COMBUSTION [l

FANHOUSING [l

(INSIDE) [

[

WIND BAFFLE

MOUNTING HOLES

Fig. 9 -- Flue Hood Location

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 55 56

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Carrier 48TJD Specifications Page 9

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