Gas Connection With Natural Gas - Rinnai E75CN Installation & Servicing Instructions Manual

6.4.1.
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NOTICE
Sediment trap figure 8
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! DANGER
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Gas connection with natural gas

The gas supply connection must comply with local regulations or, if such
regulations do not exist, with the National Fuel Gas Code, ANSI Z 223.1.
For Canada, the gas connection must comply with local regulations or, if
such regulations do not exist, with the CAN/CSA B149.1, Natural Gas and
Propane Installation Code.
Pipe sizing for natural gas
Contact gas supplier to size the gas supply line and meter.
Gas piping
A sediment trap must be installed upstream of the gas controls.
The boiler gas pipe is equipped with external 3/4" M-NPT thread, onto which the tail
piece of the gas shut off valve can be connected. Use appropriate sealing.
The connection to the boiler must include a suitable method of disconnection and a gas
control valve must be installed adjacent to the boiler for isolation purposes. The nominal
inlet gas pressure measured at the boiler should be 7" W.C. (18 mbar) for Natural gas
(Gas A). Maximum pressure with no flow (lockup) or with the boiler running is 10.5
inches W.C. Minimum pressure with the gas flowing (verify during boiler startup) is
4.0 inches W.C.
The gas pipe must be fitted to the gas valve free from any strain.
Make sure that the gas pipe system does not contain dirt, particularly with
new pipes.
Always check the safety of the gas pipe system by means of a bubble test
using leak-search spray.
The boiler and its individual shut off valve must be disconnected from the
gas supply piping system during any pressure testing of that system at test
pressures in excess of 1/2 PSI (3.5kPa).
The boiler must be isolated from the gas supply piping system by closing its
individual manual shutoff valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than 1/2 PSI (3.5 kPa).