Rinnai Water Heater REU-V2520FFUD - Manual (Page 39)

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
CANNOT be done in the field.

Rinnai America FF Models
1) A manual gas control valve must be placed upon 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 including the 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 must be leak tested before it is placed into operation.
6) 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).
7) 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.
8) 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).
9) The Rinnai Water Heater Installation location must provide adequate Combustion and
Ventilation airflow.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S
Gas Piping Notes