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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.
Direction of flow
B
A
F
E
D
C
Figure 11.1
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 statecode
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 individual shut-off valve must be disconnected from the gas supply
piping during any pressure testing of that piping at test pressures in excess of ½ psi.
W
ARNINGS
DO NOT USE A FLAME FOR CHECKING GAS LEAKS
RIVA HEAT ONLY MANUAL - REV A
22
12. Electrical Connections/Wiring