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410 Connect the Gas Supply <br /> 5. Use approved connectors to connect the water <br /> A WARN I N G <br /> heater to the gas line. Purge the gas line of <br /> • A licensed professional must install the any debris before connection to the water <br /> gas supply. heater. <br /> • Turnoff 120V power supply. 6. Any compound used on the threaded joint of <br /> • Turn off the gas. the gas piping shall be a type that resists the <br /> • Gas is flammable. Do not smoke or pro- <br /> action of liquefied petroleum gas (propane/ <br /> LPG). <br /> vide other ignition sources while working <br /> with gas. 7. The gas supply line shall be gas tight, sized, <br /> • Do not turn on the water heater or gas until and so installed as to provide a supply of gas <br /> all fumes are gone. sufficient to meet the maximum demand of the <br /> heater and all other gas consuming appliances <br /> at the location without loss of pressure. If in <br /> 410.1 Instructions <br /> doubt about the size of the gas line, refer <br /> to the "Gas Pipe Sizing Reference Tables" <br /> To connect the gas supply, follow the instructions section on the next page. <br /> below: <br /> 8. Perform a leak and pressure test prior <br /> 1. Install a manual gas control valve in the gas to operating the water heater. If a leak is <br /> supply line to the water heater.A union can detected, do not operate the water heater until <br /> be used on the connection above the shut off the leak is repaired. <br /> valve for the future servicing or disconnection <br /> of the water heater. <br /> 2. Check the type of gas and gas supply <br /> pressure before connecting the water heater. If <br /> the water heater is not of the gas type that the <br /> building is supplied with, DO NOT connect the <br /> water heater. Contact the dealer for the proper <br /> water heater to match the gas type. IN <br /> 3. Check the gas supply pressure immediately ®� <br /> upstream at a location provided by the <br /> gas company. Supplied gas pressure must COL® <br /> be within the limits shown in section "3.4 <br /> Specifications"with all gas appliances <br /> operating. <br /> G <br /> 4. Before placing the appliance in operation, all <br /> joints including the heater must be checked <br /> for gas tightness by means of soap, gas Figure 64 <br /> leak detector solution, or an equivalent <br /> nonflammable solution, as applicable. (Since Gas connection 3/4 in. <br /> some leak test solutions, including soap and MNPT connection <br /> water, may cause corrosion or stress cracking, <br /> the piping shall be rinsed with water after <br /> testing, unless it has been determined that the <br /> leak test solution is non-corrosive.) <br /> Rinnai Tankless Water Heater Installation and Operation Manual 61 <br />