Pentair NT Series installation manual Testing GAS Pressure, GAS Pressure Requirements

Section III. Installation 13

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

InletManifold

MiniMax NT TSI MiniMax NT STD

Illustrations above are for Natural Gas, for Propane requirements, see Table 7.

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

				Natural	Propane
		Gas Pressure	Model
	Regulator Adjustment Cap			Inches W.C.
1/8" NPT Plug		Maximum Inlet	STD	10	14
(Inlet Press)			TSI	10	N/A
			STD	5*	12
		Minimum Inlet
			TSI	4	N/A
	ON	Manifold	STD	4	11
			TSI	2	N/A
	OFF
	1/8" NPT Plug	NOTE: All readings must be taken while heater is
		operating. Any adjustments or readings made while
Figure 4.	(Manifold Press)
		heater is off will result in performance problems.
		All Values are +/- 0.2 inch W.C.
		* 6 inch. W.C. for STD 400 Model.
					Table 7.

Rev. E 4-15-05 P/N 472235