Installation & Servicing Instructions Rinnai E-Series
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6.4.2
Gas connection with propane gas (not for E50CRN)
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.
Pipe sizing for propane gas
- Contact gas supplier to size pipes, tanks, and gas pressure regulator.
Propane Supply Pressure Requirements
- Adjust propane supply regulator provided by the gas supplier for 14 inches W.C.
maximum pressure.
- Pressure required at gas valve inlet pressure port:
- Maximum 13.5 inches W.C. with no fl ow (lockup) or with boiler running.
- Minimum 8 inches W.C. with gas fl owing (verify during boiler startup).
Ensure that the high gas pressure regulator is installed at least 6 to 10 feet
upstream of the boiler.
Gas piping
- A sediment trap must be provided upstream of the gas shut off valve.
The boiler pipe is equipped with external 3/4" M-NPT thread. Use appropriate sealing.
The connection to the boiler must include a suitable method of disconnection.
A gas shut off valve must be installed adjacent to the boiler for isolation purposes. The
nominal inlet working gas pressure measured at the boiler should be 11 inch W.C. for
Propane gas.
The gas pipe must be properly supported and connected to the boiler.
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 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 greater than 1/2 PSI (3.5 kPa).
Gas shut o
ff
valve onto boiler
fi
gure 10a
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