Rinnai RHFE-551FA Service Manual page 88

Gas Pressure Setting Procedure
Visual Inspection of Flame
Check that the burner flames are operating
normally. The flame can be seen through the
circular window through the louvers.
When operating normally the burner flame should
appear as long, clear, blue, stable, streaks.
Yellow flames or an orange color is abnormal and
maintenance is required.
Final Assembly
Install the front panel and bottom cover.
88
Model Gas Type
Natural Gas
431 Series *
Propane
Natural Gas
556 Series *
Propane
* For installations at altitude (greater than 2000 feet), follow the
guidelines of the National Fuel Gas Code (NFPA 54) and all appli-
cable local codes.
Rinnai Direct Vent Service Manual
RHFE-431 Series, RHFE-556 Series
High Fire Low Fire
2.4 in 0.7 in
(61 mm) (18 mm)
2.8 in 0.8 in
(71 mm) (20 mm)
3.8 in 0.7 in
(97 mm) (18 mm)
4.5 in 0.8 in
(114 mm) (20 mm)
NORMAL
Flame Rod
Long, clear, blue,
stable flames
ABNORMAL
Flame Rod
Yellow flames or
orange color