Rinnai E75CN - Manual (Page 23)

Installation & Servicing Instructions Rinnai E-Series
23
6.4.2 Gas connection with propane 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 propane gas
- Contact gas supplier to size pipes, tanks, and 100% lockup 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 14 inches W.C. with no flow (lockup) or with boiler running.
- Minimum 8 inches W.C. with gas flowing (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
- Use a gas shut off valve compatible with propane gases.
- A sediment trap must be provide upstream of the gas controls.
The boiler pipe is equiped with external 3/4" M-NPT thread, onto which the tail piece
of the gas shut off valve can be screwed. Use appropriate sealing.
The connection to the boiler must include a suitable method of disconnection.
A gas control valve must be installed adjacent to the boiler for isolation purposes. The
nominal inlet working gas pressure measured at the boiler should be 12 inch W.C.
(30mbar) for Propane gas (Gas E).
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).
Gas shut off valve onto boiler
figure 7
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