Section III. Installation | 13 |
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TESTING GAS PRESSURE
1.Push the power switch to “OFF”.
2.Turn the gas valve knob to “OFF”.
3.Remove 1/8 in. NPT plug on the outlet side of the valve and screw in the fitting from the Manometer kit.
4.Connect the Manometer hose to the fitting.
5.Turn the gas valve knob to “ON”.
6.Turn on the heater and read the Manometer.
7.The Manometer must read per the values of the Gas Pressure Requirement Table, on manifold side of the gas valve, while operating.
8.If reading is below specified; check the inlet pressure while the heater is running to make sure of proper supply before attempting adjustments.
InletManifold
MiniMax NT LN
Illustration above is for Natural Gas, see Table 5.
9.For adjustment, remove the Regulator Adjustment
Cap and using a screwdriver turn the screw clockwise to increase - counterclockwise to decrease gas pressure.
CAUTION
The use of Flexible Connectors (FLEX) is NOT recommended as they cause excessive high gas pressure drops.
GAS PRESSURE REQUIREMENTS
Regulator Adjustment Cap
1/8" NPT Plug
(Inlet Press)
| ON |
| OFF |
| 1/8" NPT Plug |
Figure 4. | (Manifold Press) |
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| Natural | |
Gas Pressure | Model |
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Inches | |||
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| W.C. | |
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Maximum Inlet | LN | 10 | |
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Minimum Inlet | LN | 5* | |
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Manifold | LN | 4 | |
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NOTE: All readings must be taken while heater is operating. Any adjustments or readings made while heater is off will result in performance problems.
All Values are +/- 0.2 inch W.C. * 6 inch. W.C. for LN 400 Model.
Table 5.
Rev. E | P/N 472089 |