Rinnai V3237FFU - Manual (Page 40)

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Rinnai Corporation V3237 Models
GAS PIPING NOTES
1) A manual gas control valve must be placed in the gas supply line to the Rinnai Water
Heater. A union can be used on the connection above the shut off valve for the future
servicing or disconnection of the unit.
2) Check the type of gas and the gas inlet pressure before connecting the Rinnai Water
Heater. If the Rinnai Water Heater is not of the gas type that the building is supplied with,
DO NOT connect the water heater. Contact the dealer for the proper unit to match the gas
type.
3) Minimum and Maximum Gas pressures are listed below:
* Minimum value is for input adjustment
Natural Gas: Minimum 6” WC Propane Gas: Minimum 10” WC
Maximum 10.5” WC Maximum 13.5” WC
4) After completion of gas pipe connections, all joints, and the water heater, must be checked
for gas-tightness by means of leak detector solution, soap and water, or an equivalent
nonflammable solution, as applicable.
5) The Rinnai Water Heater and its individual shut-off valve must be disconnected from the
gas supply piping system when pressure testing of the gas supply piping system at test
pressures greater than 1/2 psi (3.5 kPa).
6) Always use approved connectors to connect the unit to the gas line. Always purge the gas
line of any debris before connection to the water heater.
7) The Rinnai Water Heater must be isolated from the gas supply piping system by closing it's
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).
8) The Rinnai Water Heater Installation location must provide for adequate combustion and
ventilation airflow.
Since some leak test solutions, including soap and water, may cause corrosion or
stress cracking, the piping must be rinsed with water after testing, unless it has
been determined that the leak solution is non-corrosive.
Conversion of this unit from natural gas to propane or propane to natural gas is not
recommended in the field. Contact Rinnai at 800-621-9419.
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