Bryant 310A Installation, Start--Up, Operating, And Service And Maintenance page 21

2" (51mm)
Street Elbow
Fig. 21 --- Burner and Manifold
Some installations require gas entry on right side of furnace (as
viewed in upflow.) (See Fig. 21.)
Install a sediment trap in riser leading to furnace as shown in Fig.
22. Connect a capped nipple into lower end of tee. Capped nipple
should extend below level of furnace gas controls. Place a ground
joint union between furnace gas control valve and exterior
manual equipment gas shutoff valve. A 1/8- -in. (3 mm) NPT
plugged tapping, accessible for test gauge connection, MUST be
installed immediately upstream of gas supply connection to
furnace and downstream of manual equipment shutoff valve.
GAS
SUPPLY
MANUAL
SHUTOFF
VALVE
(REQUIRED)
SEDIMENT
TRAP
UNION
Fig. 22 --- Typical Gas Pipe Arrangement
Piping should be pressure and leak tested in accordance with
NFGC in the United States or CAN/CSA- -B149.1- -05 in Canada,
local, and national plumbing and gas codes before the furnace has
been connected. After all connections have been made, purge
lines and check for leakage at furnace prior to operating furnace.
If pressure exceeds 0.5 psig (14- -in. wc), gas supply pipe must be
disconnected from furnace and capped before and during supply
pipe pressure test. If test pressure is equal to or less than 0.5 psig
(14- -in. wc), turn off electric shutoff switch located on furnace gas
control valve and accessible manual equipment shutoff valve
before and during supply pipe pressure test. After all connections
have been made, purge lines and check for leakage at furnace
prior to operating furnace.
FACTORY
INSTALLED
LOCATION
A08551
Fig. 24 --- Field- -Supplied Electrical Box on Furnace Casing
The gas supply pressure shall be within the maximum and
minimum inlet supply pressures marked on the rating plate with
the furnace burners ON and OFF.
A02035
ELECTRICAL CONNECTIONS
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Blower access panel door switch opens 115- -v power to
control. No component operation can occur. Do not bypass
or close switch with panel removed.
See Fig. 26 for field wiring diagram showing typical field 115- -v
wiring. Check all factory and field electrical connections for
tightness.
21
TWO
ALTERNATE
FIELD
LOCATIONS
Fig. 23 --- Relocating J- -Box
WARNING
A02099
A03221