HVACopediaRinnai · Wall furnace
PH High-fire gas pressure setting mode
What the display is showing
Appears after the Test Switch is pressed once more from PL. The high-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
- Compare the manometer reading with the table; adjust with the up and down buttons.
- Press ON/OFF to finish; the display goes blank and the furnace returns to normal off mode.
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
- L Set temperature L (minimum burner output)
- Lock Control panel lock indicator
- ON lamp green ON indicator green (powered, burner not lit)
- ON lamp red ON indicator red (burner lit)
- PL Low-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
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Source: Rinnai EX08DT/EX11DT Installation and Operation Manual (200000083) and EX17DT/EX22DT (200000084), Gas pressure setting steps 12-14 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.