Step 6 - Trap Condensate Drain; Step 7 - Install Gas Piping - Carrier WeatherMaker 48A020 Installation Instructions Manual

Fig. 18 — Flue Hood Location
(48A020-050 Units)
FLUE HOOD
WIND
BAFFLE
TOP VIEW
Fig. 19 — Flue Hood Location
(48A2,A3,A4,A5060 Units)
Fig. 20 — Combustion Fan Housing Location
(48A020-050 Shown)
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GAS SECTION
ACCESS PANEL
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SIDE VIEW
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Step 6 — Trap Condensate Drain
See Fig. 5-12 for drain location. Condensate drain is open to atmo-
sphere and must be trapped. Install a trapped drain at the drain
location. One 1-in. female coupling is provided inside the unit
evaporator section for condensate drain connection. A trap at least
4 in. deep must be used. See Fig. 21. 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 quality guide-
lines. The condensate drain pans are not insulated.
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Fig. 21 — 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 con-
form with local building codes or, in the absence of local codes,
with the National Fuel Gas Code, ANSI Z223.1.
Install manual gas shutoff valve with a
test gage connection at unit. Field gas piping must include sedi-
ment trap and union. See Fig. 22. A
the gas manifold adjacent to the gas valve.
Do not pressure test gas supply while connected to unit.
Always disconnect union before servicing. Personal injury or
damage to unit may occur.
IMPORTANT: Natural gas pressure at unit gas connection
must not be less than 5 in. wg or greater than 13.5 in. wg.
Size gas-supply piping for 0.5-in. wg maximum pressure drop. Do
not use supply pipe smaller than unit gas connection.
Fig. 22 — Field Gas Piping
23
/ -in. NPT pressure tap for
1
8
/ -in. NPT is also located on
1
8
WARNING
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