Biasi Riva Advance Combi, Инструкция по установке и эксплуатации, Страница: 29 / 72

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RIVA ADVANCE COMBI MANUAL
11. Gas Pipe Connections
Gas supply piping is to be sized and installed properly in order to provide a supply of gas
sufficient to meet the maximum demand without undue loss of pressure between the meter
and the boiler. Consult with the National Fuel Gas Code ANSI Z223.1 for proper sizing of gas
piping for various lengths and diameters.
The boiler must be cut out from the gas supply piping system by closing its shut-off valve
during any gas supply piping system pressure test where there is test pressures equal or lower
than 1/2 psi (3.5 kPa).
Figure 11.1
Direction of flow
B
A
F
E
D
C
A) Manual T-handle Shutoff Valve
B) Pressure Gauge Port
C) Flexible Gas Line to Burner
D) Male Union ¾” NPT
E) Pipe Cap
F) 1” X 1” X ¾” TEE
Note: Height of valve above ground level
to conform to local codes, if any.
Massachusetts state code requires
gas shut off to be a tee handled gas
cock.
Locate a drop pipe adjacent to, but not in front of the boiler. Locate a tee (F) in the drop pipe at
the same elevation as the gas inlet connection to the boiler. Extend the drop line with a nipple
towards the floor and cap to form a sediment trap (E). Install a shut off valve (A) before the tee
with sediment trap and a union after the tee before the combination gas valve (D).
When installing the boiler, make sure a pipe compound resistant to the action of liquefied
petroleum is used. Check piping for leaks. Always check leaks with a water and soap solution.
The boiler and its gas connection must be leak tested before placing the boiler in operation.
The boiler and its individual shut-off valve must be disconnected from the gas supply piping
system during any pressure test in excess of ½ psi (3.5 kPa).
WARNINGS
DO NOT USE A FLAME FOR CHECKING GAS LEAKS.