Carrier 48AJ installation instructions Install Flue Hood

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.

a48-3712

Fig. 14 — Flue Hood Location

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

GAS SECTION

ACCESS PANEL

FLUE HOOD

WIND

BAFFLE

TOP VIEW SIDE VIEW a48-4076

Fig. 15 — Flue Hood Location

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

a48-3823

Fig. 16 — Combustion Fan Housing Location

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

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.

a48-3714

Fig. 17 — Condensate Drain Trap Piping Details

(Typical Roof Curb or Slab Mount Shown)

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 1/8-in. NPT pressure tap for test gage connection at unit. Field gas piping must in- clude sediment trap and union. See Fig. 18. An 1/8-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.

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