REU-2532FFU Series 52 Rinnai
24. Gas Pressure Setting Procedure
CONTINUUM V2532FFU
All settings/adjustments must be performed
by a qualified Service Technician.
1. Turn unit off at power source and turn off the gas to the water heater.
2. Remove the front cover from the water heater.
3. Remove the gas pressure test port plug. Connect manometer to this port. See Figure #1 for
location of the test port plug. Turn on the gas to the water heater.
4. Flow water through the water heater at the maximum flow rate obtainable.
5. To adjust the “Low” fire pressure, set combustion control dip switch #1 to the “OFF” position,
switch # 7 to the “ON” position, and switch #8 to the “OFF” position (see figure #2 for location
of combustion control switches.) This will put the unit into forced low fire. Check the pressure
reading on your manometer. If the pressure needs adjusting, remove the rubber plug from the
bottom of the water heater casing (located beneath the regulator), to access the regulator
adjustment screw. Adjust the pressure to the correct setting (See figure #1 for location of the
regulator adjustment screw.) Below are the proper pressures for “Low” fire, per gas type being
used.
Propane 0.93” w.c
. @ 11” w.c. supply (Low fire rate of 15,000 BTU’s)
Natural 0.77” w.c
. @ 7” w.c. supply (Low fire rate of 15,000 BTU’s)
6. To adjust the “High” fire pressure, set combustion control dip switch #1 to the “ON” position,
switch # 7 to the “ON” position, and switch #8 to the “ON” position (see figure #2 for location
of the combustion control switches), this will put the unit into forced high fire. Check the
pressure reading on your manometer. If the pressure needs adjusting, adjust it by turning the
high pressure “Pot”. See figure #2 for location of “high pressure setting pot”. Below are the
proper pressures for “High” fire, per gas type being used.
Propane 4.2” w.c
. @ 11” w.c. supply (High fire rate of 180,000 BTU’s)
Natural 3.7” w.c
. @ 7” w.c. supply (High fire rate of 180,000 BTU’s)
7. Verify both low and high fire pressures by placing the water heater into “Forced Low Fire” and
“Forced High Fire” as described in steps 5 and 6 above. This completes the gas pressure setting
procedure.
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