Additional Precaution For Excess Flow Valve (Efv); Adjusting Gas Pressure At The Water Heater; Setting And Verifying The Combustion Setting - Rheem RTGH-RH11DV Use And Care Manual

Figure 20 – LP Gas Piping Installation – NOTE: Capacity to be Not Less than Total Capacity of Connected Appliances
▪ C. ADDITIONAL PRECAUTION FOR EXCESS FLOW VALVE (EFV
If an excess flow valve (EFV) is in the gas line, check the manufacturer's minimum and
maximum flow capacity ratings. An improperly sized EFV will not allow for a full flow of gas
to the water heater and will cause the water heater to malfunction. See Figure 21.
▪ D. ADJUSTING GAS PRESSURE AT THE WATER HEATER
NOTE: Refer Figure 22 when adjusting gas pressure. Loosen the bolts before checking the
gas inlet pressure.
1. The water heater and its individual shutoff valve must be disconnected from the gas
supply piping system during any pressure testing of the system at test pressures greater
than ½ psi (3.5 kPa).
2. The water heater 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 ½ psi (3.5 kPa). The minimum and maximum inlet gas line pressures must meet
the requirements shown in Table 18.
LP GAS / NATURAL GAS
Minimum Pressure
Maximum Pressure
Table 18 – Gas Pressure Requirements
Do not fire (operate) the water heater until all connections have been complet-
ed and the heat exchanger is filled with water. Doing so will damage the water
heater and void the warranty.
▪ E. SETTING AND VERIFYING THE COMBUSTION SETTING
NOTE: Turn on a hot water faucet at a nearby location in the water heating system to
draw water at a high flow rate. This will ensure the water heater will run continuously
while running the combustion test.
Do not fire (operate) the water heater until all connections have been completed and the heat exchanger is filled with water. Doing so will
damage the water heater and void the warranty.
1. After the appliance has fired, flip DIP switch seven (7) to the ON position (low fire). Proceed to check appliance combustion values.
NOTE: Use a combustion analyzer to ensure CO and CO
It is required to use a combustion analyzer to verify final adjustment according to the combustion chart (Table 19). Failure to do so could
result in serious personal injury or death.
5.0" W.C (1.25 kPa)
13.0" W.C (3.24 kPa)
NOTICE
values are within the range shown in Table 19.
2
)
Manifold pressure port
Inlet Gas pressure port
Figure 22 – Inlet Gas Pressure Port Detail
NOTICE
WARNING
Figure 21 – Excess Flow Valve (EFV)
43
AP18733 REV. 3.2.17