Carrier WEATHERMAKER 48AJ User Manual

Page 19

Step 5 — Install Flue Hood

48AJ,AK,AW,AY020-050 UNITS — Flue hood is shipped

inside gas section of unit. To install, secure flue hood to access

panel. See Fig. 14.
48AJ,AK,AW,AY051 AND 060 UNITS — Flue hood and

wind baffle are shipped inside gas section of unit. To install, se-

cure flue hood to access panel. Install the two pieces of the

wind baffle over the flue hood. See Fig. 15.
NOTE: When properly installed, flue hood will line up with

combustion fan housing. See Fig. 16.

Step 6 — Trap Condensate Drain —

See Fig. 4-9

for drain location. Condensate drain is open to atmosphere and

must be trapped. Install a trapped drain at the drain location.

One 1-in. FPT coupling is provided inside the unit evaporator

section for condensate drain connection. A trap at least 4-in.

deep must be used. See Fig. 17. Trap must be installed to pre-

vent freeze-up.

Condensate pans are sloped so that water will completely

drain from the condensate pan to comply with indoor air quali-

ty guidelines. The condensate drain pans are not insulated.

Step 7 — Install Gas Piping —

Unit is equipped for

use with natural gas. Installation must conform with local

building codes or, in the absence of local codes, with the Na-

tional Fuel Gas Code, ANSI Z223.1.

Install manual gas shutoff valve with a

-in. NPT pressure

tap for test gage connection at unit. Field gas piping must in-

clude sediment trap and union. See Fig. 18. An

-in. NPT is

also located on the gas manifold adjacent to the gas valve.

WARNING

Do not pressure test gas supply while connected to unit.

Always disconnect union before servicing. Serious injury

could result.

FLUE HOOD

GAS SECTION
ACCESS PANEL

WIND
BAFFLE

TOP VIEW

SIDE VIEW

Fig. 14 — Flue Hood Location

(48AJ,AK,AW,AY020-050 Units)

Fig. 15 — Flue Hood Location

(48AJ,AK,AW,AY051 and 060 Units)

a48-3712

a48-4076

Fig. 16 — Combustion Fan Housing Location

(48AJ,AK,AW,AY020-050 Shown)

a48-3823

Fig. 17 — Condensate Drain Trap Piping Details

(Typical Roof Curb or Slab Mount Shown)

a48-3714