Step 12 - Install External Condensate Trap And; Line - Carrier WeatherExpert 48JC04 Installation Instructions Manual

BURNER
ACCESS
PANEL
THRU-CURB ADAPTER
SHUT OFF
VALVE
Fig. 21 — Gas Piping, Typical Curb Sidewall Piping
(Example 2)
Fig. 22 — Gas Piping, Typical Thru-Base
Connections
When installing the gas supply line, observe local codes per-
taining to gas pipe installations. Refer to the NFPA 54/ANSI
Z223.1 NFGC latest edition (in Canada, CAN/CSA B149.1).
In the absence of local building codes, adhere to the following
pertinent recommendations:
• Avoid low spots in long runs of pipe. Grade all pipe
per every 15 ft (7 mm per every 5 m) to prevent traps.
Grade all horizontal runs downward to risers. Use risers to
connect to heating section and to meter.
• Protect all segments of piping system against physical and
thermal damage. Support all piping with appropriate
straps, hangers, etc. Use a minimum of one hanger every
6 ft (1.8 m). For pipe sizes larger than
ommendations of national codes.
• Apply joint compound (pipe dope) sparingly and only to
male threads of joint when making pipe connections. Use
only pipe dope that is resistant to action of liquefied petro-
leum gases as specified by local and/or national codes. If
using PTFE (Teflon ) tape, ensure the material is Double
1
Density type and is labeled for use on gas lines. Apply tape
per manufacturer's instructions.
• Pressure-test all gas piping in accordance with local and
national plumbing and gas codes before connecting piping
to unit.
1. Teflon is a registered trademark of DuPont.
9" (229 mm) MIN
UNION
UNIT BASE RAIL
DRIP
LEG
/
1
/ -in., follow rec-
1
2
NOTE: Pressure test the gas supply system after the gas supply
piping is connected to the gas valve. The supply piping must be
disconnected from the gas valve during the testing of the piping
systems when test pressure is in excess of 0.5 psig (3450 Pa). Pres-
sure test the gas supply piping system at pressures equal to or less
than 0.5 psig (3450 Pa). The unit heating section must be isolated
from the gas piping system by closing the external main manual
shutoff valve and slightly opening the ground-joint union.
Check for gas leaks at the field-installed and factory-installed
gas lines after all piping connections have been completed. Use
soap-and-water solution (or method specified by local codes
and/or regulations).
Failure to follow this warning could result in personal inju-
ry, death and/or property damage.
• Connect gas pipe to unit using a backup wrench to
avoid damaging gas controls.
• Never purge a gas line into a combustion chamber.
• Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically
for the detection of leaks to check all connections.
• Use proper length of pipe to avoid stress on gas control
manifold.
NOTE: If orifice hole appears damaged or it is suspected to have
been redrilled, check orifice hole with a numbered drill bit of cor-
rect size. Never redrill an orifice. A burr-free and squarely aligned
orifice hole is essential for proper flame characteristics. See
Fig. 23.
-in.
4
Step 12 — Install External Condensate Trap and

Line

The unit has one
of the condensate pan and an alternate connection on the bot-
tom. See Fig. 24. Unit airflow configuration does not deter-
mine which drain connection to use. Either drain connection
can be used with vertical or horizontal applications.
When using the standard side drain connection, ensure the red
plug in the alternate bottom connection is tight. Do this before
setting the unit in place. The red drain pan can be tightened
with a / -in. square socket drive extension.
1
2
To use the alternate bottom drain connection, remove the red
drain plug from the bottom connection (use a
et drive extension) and install it in the side drain connection.
The piping for the condensate drain and external trap can be
completed after the unit is in place. See Fig. 25.
15
WARNING
BURNER
ORIFICE
Fig. 23 — Orifice Hole
/ -in. condensate drain connection on the end
3
4
/ -in. square sock-
1
2