HVACopediaRinnai · Furnace · Startup
Normal start and heating
What happens, in order
- Press ON/OFF on the control panel and the LED display lights, ON lamp is green
- Combustion fan starts (forced combustion)
- Spark ignites the main burner
- When flame is proven the ON lamp turns red and the spark stops
- Once the furnace warms up the room convection fan starts automatically
- Thermostat modulates the burner and the fan between L (minimum) and H (maximum) to hold the set temperature
- If power fails while running, the furnace restarts by itself when power returns
Timings and thresholds
| Item | Value |
|---|---|
| Forced combustion before control logic takes over | about 15 to 18 s |
| Temperature setting range | 60 to 80 F in 2 F steps (or L / H) |
Codes you may see during this
11
Applies to: Rinnai EX08DT, EX11DT, EX17DT, EX22DT direct-vent room furnaces
Models
More Rinnai furnace sequences
- Ignition failure and flame loss retry · Ignition
- Normal shutdown and cool-down · Standby/shutdown
Related
Rinnai error codes · Rinnai tips · Rinnai parts · All Rinnai sequences
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Sequences of operation, error codes and tips work offline in the HVACopedia app.
Source: Rinnai EX08DT and EX11DT Installation and Operation Manual (200000083) and EX17DT and EX22DT Installation and Operation Manual (200000084), operation and fault sections. Written in our own words; timings can differ by model and software version, so check the manual for your exact unit.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.