Rinnai RX199i Manual page 10

1. Remove the water heater front panel (if not done so already) by removing the two screws and
releasing the two latches. Refer to the "Tankless Water Heater Installation and Operation
Manual" for complete instructions on removing the front panel.
2. Press the "On/Off" button on the controller to start
the unit (Figure 10). Set the water temperature to
120°F (49°C) or higher, and turn on two or three
faucets or showers. Refer to the "Tankless Water
Heater Installation and Operation Manual" for
steps on adjusting water temperature.
3. The combustion fan will begin to run if water is
flowing, and the spark will ignite the main burner.
4. This water heater has an automatic ignition system. When the main burner is lit, the "In Use"
light (Figure 10) will glow red and the spark will stop.
5. Let the water heater run for at least five minutes.
6. Check that the burner flames are operating normally. The flame can be seen through the circular
window below the burner. When operating normally, the burner flame should burn evenly over
the entire surface. The flame should be clear, blue and stable. A yellow flame is abnormal and
maintenance is required (Figure 11).
Figure 11
FLAME
ROD
7. If the flame looks satisfactory, turn off the water faucets or showers.
8. Turn off the unit by pressing the "On/Off" button on the controller.
9. Reinstall the front panel using the two screws and two latches to secure it.
CAUTION
10. Enter the required information on the gas conversion label (Figure 12).
Figure 12
11. Apply the gas conversation label at an open
space above the existing label on the left side
of the water heater (Figure 13).
12. The gas conversion steps are complete.
10
SATISFACTORY
BLUE FLAME
Do not touch the areas at or near the heat exchanger or hot
water lines; these areas become hot and could cause burns.
Gas Conversion Manual for Condensing Tankless Water Heaters
Figure 10
"In Use"
Light
UNSATISFACTORY
FRONT VIEW
OF FLAME
FLAME
ROD
YELLOW FLAME
Figure 13
Gas
Conversion
Label
On/Off
Button
Left Side
of Water
Heater