HVACopediaRinnai · Wall furnace
PL Low-fire gas pressure setting mode
What the display is showing
Appears on the LED display during the gas pressure setting procedure after the Test Switch is pressed twice with the furnace running. The low-fire manifold pressure is set here with the up and down buttons.
Applies to: Rinnai EX08DT, EX11DT, EX17DT, EX22DT direct vent wall furnaces
What to do
- In the gas pressure setting procedure, press the Test Switch twice while the furnace is on: PL shows.
- Compare the manometer reading with the table for the gas, altitude and vent length; adjust with the up and down buttons.
- Press the Test Switch to move to PH.
Settings for these units
Clearances to combustibles and service · EX DT
| Location | Clearance |
|---|---|
| Top | 0 in. (0 mm) |
| Bottom / ground | 0 in. (0 mm) |
| Front (panel) | 40 in. (1 m) - flooring or carpet under 1.2 in. (30 mm) high not included |
| Back (including back spacer) | 0 in. (0 mm) |
| Sides (left and right) | 2 in. (50 mm) |
| Service access | 10 in. (254 mm) sides; 40 in. (1 m) front; area above per figure |
| Exhaust extension pipe | 1 in. (25.4 mm) to combustibles; 0 in. to non-combustibles |
Rinnai recommends 10 in. (254 mm) at top and both sides for servicing.
Service clearance figure above the unit: 10 in. (254 mm) on EX08DT/EX11DT, 9 in. (229 mm) on EX17DT/EX22DT.
Models that show this code
5 models in EX DT
Other codes on the same units
- Lock Control panel lock indicator
- ON lamp green ON indicator green (powered, burner not lit)
- ON lamp red ON indicator red (burner lit)
- PH High-fire gas pressure setting mode
- Set / Room temp Display: set temperature and room temperature
- Set back Set back indicator lit (frost protection on)
- Timer lamp Timer lamp solid or flashing
- °F/°C Temperature scale selection
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Source: Rinnai EX08DT/EX11DT Installation and Operation Manual (200000083) and EX17DT/EX22DT (200000084), Gas pressure setting steps 10-11 p.26. Summarized in our own words; check the original manual for your model.
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.