How To Check Manifold Gas Pressure - Rheem RTG2-42 Troubleshooting Manual

operating water flow.
b. Push the Adjusting Button on the PC Board. [LH] is displayed on the LED of
remote control.
c. Hold the Adjusting Button; push the "SW1" button on the PC Board. The
current number [01 - 39] is displayed on the LED of remote control.
NOTE: Every time you press the MIN button, the display will cycle up to the number 39. Once
it reaches 39, it will automatically reverse and cycle back down to 1.
d. You can change the gas pressure by pushing the "SW1" button. Using the
manometer, adjust the minimum manifold pressure to the standard pressure plus
the measured minimum fan pressure.
e. Release the "SW1" button.
2. Adjustment of "Maximum" capacity
a. Open the hot water tap fully to allow the water heater to ignite a maximum
operating flow. You may need to turn on up to three fixtures to get max water
flow.
b. Push the Adjusting Button on the PC Board. [LH] is displayed on the LED of
remote control.
c. Hold the Adjusting Button; push the "SW2" Button on the PC Board. The current
figure [01 - 39] is displayed on the LED of remote control.
d. You can change the test gas pressure by pushing the "SW2" button every time.
Using the manometer, adjust the minimum manifold pressure to the standard
pressure plus the measured maximum fan pressure.
e. Release the "SW2" button.
Note: If [EE] is displayed on the LED of remote control, adjust again with caution. This means
there was an error in the adjustment sequence.

How to Check Manifold Gas Pressure

When the "MAX" or "MIN" button is pushed, the combustion is fixed at the respective firing rate.
The LED of remote control displays 1L (minimum combustion) or 3H (maximum combustion).
The adjusted manifold pressure must be as follows.
RTG74-Indoor
NAT. Gas
L.P. Gas
RTG74 -Outdoor
NAT. Gas
L.P. Gas
Second Generation Product Fan Speeds
42PVP 2nd
42PVN 2nd
53PVP
53PVN
MAX. (in. w.c.)
2.52+ fan pressure (max.)
7.36+ fan pressure (max.)
MAX. (in. w.c.)
2.32+ fan pressure (max.)
6.61+ fan pressure (max.)
2.52 + fan pressure (max.)
2.36 + fan pressure (max.)
3.50 + fan pressure (max.)
3.46 + fan pressure (max.)
SVC 810 Tankless Troubleshooting Manual
MIN. (in. w.c.)
0.45+ fan pressure (min.)
1.22+ fan pressure (min.)
MIN. (in. w.c.)
0.43+ fan pressure (min.)
1.10+ fan pressure(min.)
0.45 + fan pressure (min.)
0.45 + fan pressure (min.)
0.45 + fan pressure (min.)
0.45 + fan pressure (min.)
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