Section III. Installation | 12 |
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TESTING GAS PRESSURE
Inlet
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.
Manifold Inlet
Manifold
8. If reading is below specified; check the | MiniMax NT TSI | MiniMax NT STD | |
Illustrations above are for Natural Gas, for Propane requirements, see Table 7. | |||
inlet pressure while the heater is | |||
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running to make sure of proper supply before attempting adjustments. |
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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
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| Gas Pressure | Model | Natural | Propane | |
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| Inches W.C. | ||||
| Regulator Adjustment Cap |
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1/8" NPT Plug |
| Maximum Inlet | STD | 10 | 14 | |
(Inlet Press) |
| TSI | 10 | N/A | ||
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| Minimum Inlet | STD | 5* | 12 | |
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| TSI | 4 | N/A | |
| ON | Manifold | STD | 4 | 11 | |
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| TSI | 2 | N/A | |
| OFF | NOTE: All readings must be taken while heater is | ||||
| 1/8" NPT Plug | |||||
| operating. Any adjustments or readings made while | |||||
Figure 4. | (Manifold Press) | |||||
heater is off will result in performance problems. | ||||||
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| All Values are +/- 0.2 inch W.C. |
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| * 6 inch. W.C. for STD 400 Model. |
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| Table 7. | |
P/N • Réf. 472090 | Rev. G • Rév. G |
