Installation Guide

Installation & Servicing Instructions Rinnai Q-Series
26
6.4 Gas connection
Only work on gas lines if you are licensed for such work.
If these instructions are not followed exactly, a fi re or explosion may result
causing property damage, personal injury or death.
Rinnai wall mounted boilers are built to run on Natural Gas or Propane Gas.
The gas type the boiler is suitable for is indicated on the packaging and on the
boiler by a blue label with Natural Gas or a green label with Propane Gas and
on the identifi cation plate on the boiler.
First check the identifi cation plate on the boiler for the suitable gas type.
Do not use the boiler for another type of gas than indicated on the identifi cation
plate of the boiler. This will cause improper functioning and can damage the
boiler.
Natural gas: refer to chapter 6.4.1
Propane gas: refer to chapter 6.4.2
6.4.1. 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 working gas pressure measured at the boiler should be 7" W.C. (18 mbar)
for Natural gas (Gas A). Maximum pressure with no fl ow (lockup) or with the boiler
running is 10.5" W.C. Minimum pressure with the gas fl owing (verify during boiler
startup) is 4.0" W.C.
The gas pipe must be fi tted 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).
NOTICE
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WARNING
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Sediment trap fi gure 12a