Bryant 580J*04A, Руководство по установке

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Fig. 16 — Gas Line Piping (3 to 6 Ton Units Only)
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 shut-
off valve be located upstream of the sediment trap. See Fig. 17
and 18 for typical piping arrangements for gas piping that has
been routed through the sidewall of the curb. See Fig. 19 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.
Fig. 17 — Gas Piping with Thru-Curb Accessory
Fig. 18 — Gas Piping with Thru-Curb Accessory
(Alternate Layout)
Fig. 19 — Gas Piping Thru-Base Connections
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 /
4
-in. in every 15 ft (7 mm in every 5 m) to prevent
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 appropriate
straps, hangers, etc. Use a minimum of one hanger every
6 ft (1.8 m). For pipe sizes larger than 1 /
2
-in., follow rec-
ommendations of national codes.
3. 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 pe-
troleum gases as specified by local and/or national codes.
If using PTFE (Teflon*) tape, ensure the material is Dou-
ble Density type and is labeled for use on gas lines. Apply
tape per manufacturer’s instructions.
4. Pressure-test all gas piping in accordance with local and
national plumbing and gas codes before connecting pip-
ing to unit.
EMBO SS MENT
BRA SS FITTING
FOR 3 -6 TON UNIT S
S UPPORT
BRACKET
9 ” (229mm) min
Union
S h u t Off
V a lve
Drip
Leg
Thr u -C u r b Ad a pter
Unit B as e R a il
Drip
Leg
S h u t Off
V a lve
Union
Thr u -C u r b Ad a pter
B u rner
Acce ss
P a nel
9 ” (229mm) min
Unit B as e R a il
* Teflon is a registered trademark of DuPont.