Pentair MiniMax NT LN installation manual Testing GAS Pressure, GAS Pressure Requirements

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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

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)

 

 

Natural

Gas Pressure

Model

 

Inches

 

 

 

 

W.C.

 

 

 

Maximum Inlet

LN

10

 

 

 

Minimum Inlet

LN

5*

 

 

 

Manifold

LN

4

 

 

 

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 4-19-05

P/N 472089

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Contents MiniMax NT LN Series Customer Service Table of Contents Heater Identification Information HIN Heater Identification InformationImportant Notices Warranty InformationCode Requirements Consumer Information and SafetySpecifications Installation InstructionsBelow or Above Pool Installation Below Pool InstallationPlumbing Connections ValvesReversing Headers Water ConnectionsReversible Inlet/Outlet Connection, cont’d GAS Connections GAS Line InstallationsSediment Traps Pipe Sizing for GAS Line Connections GAS Pipe SizingGAS Pressure Requirements Testing GAS PressureIndoor Venting General Requirements Outdoor Shelter Installation Canada Indoor Installation USA onlyVent Adaptors Combustion AIR SupplyFits ALL Models Indoor Installations Minimax NT Venting Guidelines Outdoor Vent KIT Outdoor Installation Venting Guidelines Side ViewElectrical Connections Electrical Rating 60 Hz 120 / 240 Volts AC, single phaseWire Color Minimax NT LN HSI Electronic Ignition LIGHTING/OPERATION Basic System OperationVacuum AIR Pressure FAN Switch Safety ControlsWater Pressure Switch LOW GAS Pressure SwitchHigh Limits Heat ModeOperation of Ignition Module Failure to Light the BURNER-LOCK OUTSystem Indicator Lights Digital Display Temperature Controller DdtcSection IV. Operation SET UP Temperature Setting Troubleshooting Ddtc Troubleshooting InstructionService CHECKS-IGNITION Module Troubleshooting GeneralEnergy Saving Tips Maintenance InstructionWinter Operation Spring and Fall OperationPool and SPA Water Chemical BalanceReplacement Parts NT LN w/DDTC Rev. E Rev. E Pentair Water Pool and Spa, Inc