Bryant 581J Installation Instructions Manual page 15

EMBOSSMENT STAINLESS STEEL FITTING
Fig. 17 - - Gas Line Piping
Other hardware required to complete the installation of
the gas supply line will include a manual shutoff valve, a
sediment trap (drip leg) and a ground- - joint union. A
pressure regulator valve may also be required (to convert
gas pressure from pounds to inches of pressure). The
manual shutoff valve must be located within 6- - ft (1.83 m)
of the unit. The union, located in the final leg entering the
unit, must be located at least 9- - in (230 mm) away from
the access panel to permit the panel to be removed for
service. If a regulator valve is installed, it must be located
a minimum of 4- - ft (1220 mm) away from the unit's flue
outlet. Some municipal codes require that the manual
shutoff valve be located upstream of the sediment trap.
See Fig. 18 and Fig. 19 for typical piping arrangements
for gas piping that has been routed through the sidewall of
the curb. See Fig. 20 for typical piping arrangement when
thru- - base is used. Ensure that all piping does not block
access to the unit's main control box or limit the required
working space in front of the control box.
When installing the gas supply line, observe local codes
pertaining 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:
1. Avoid low spots in long runs of pipe. Grade all pipe
1
/ - - in. in every 15 ft (7 mm in every 5 m) to prevent
4
traps. Grade all horizontal runs downward to risers.
Use risers to connect to heating section and to meter.
2. Protect all segments of piping system against physical
and thermal damage. Support all piping with appro-
priate straps, hangers, etc. Use a minimum of one
hanger every 6 ft (1.8 m). For pipe sizes larger than
1
/ - - in., follow recommendations of national codes.
2
3. Apply joint compound (pipe dope) sparingly and only
to male threads of joint when making pipe connec-
tions. Use only pipe dope that is resistant to action of
liquefied petroleum gases as specified by local and/or
national codes. If using PTFE (Teflon) tape, ensure
the material is Double Density type and is labeled for
use on gas lines. Apply tape per manufacturer's in-
structions.
4. Pressure- - test all gas piping in accordance with local
and national plumbing and gas codes before connect-
ing piping to unit.
Thru-Curb Adapter
SUPPORT
BRACKET
C08579
Shut Off
Valve
Fig. 18 - - Gas Piping with Thru- - Curb Accessory
Thru-Curb Adapter
Fig. 19 - - Gas Piping with Thru- - Curb Accessory
Fig. 20 - - Gas Piping with Thru- - Base Accessory
15
9" (229mm) min
Drip
Leg
9" (229mm) min
Burner
Access
Panel
Shut Off
Valve
(alternate layout)
Union
Unit Base Rail
C07469
Union
Unit Base Rail
Drip
Leg
C07470
C08018