Pentair MiniMax NT LN installation manual GAS Connections, Sediment Traps, GAS Line Installations

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Section III. Installation

11

 

 

GAS CONNECTIONS

GAS LINE INSTALLATIONS

Before installing the gas line, be sure to check which gas the heater has been designed to burn. This is impor- tant because different types of gas require different gas pipe sizes. The rating plate on the heater will indicate which gas the heater is designed to burn. The tables, shown on page 12, show which size pipe is required for the distance from the gas meter to the heater. The table is for natural gas at a specific gravity of .65.

When sizing gas lines, calculate three (3) additional feet of straight pipe for every elbow used. When installing the gas line, avoid getting dirt, grease or other foreign material in the pipe as this may cause damage to the gas valve, which may result in heater failure.

The gas meter should be checked to make sure that it will supply enough gas to the heater and any other appliances that may be used on the same meter. The gas line from the meter will usually be of a larger size than the gas valve supplied with the heater. Therefore a reduction of the connecting gas pipe will be necessary. Make this reduction as close to the heater as possible.

The heater and any other gas appliances must be disconnected from the gas supply piping system during any pressure testing on that system, (greater that ½ PSI). The heater and its gas connection must be leak tested before placing the heater in operation. Do not use flame to test the gas line. Use soapy water or another nonflammable method.

NOTE

A manual main shut-off valve must be installed externally to the heater.

WARNING

DO NOT INSTALL THE GAS LINE UNION INSIDE THE HEATER CABINET. THIS WILL VOID YOUR WARRANTY.

SEDIMENT TRAPS

Install a sediment in front of the gas controls. The sediment trap shall be either a tee fitting with a capped nipple in the bottom outlet which can be removed for cleaning, as illustrated in Figure 3, or a other device recognized as an effective sediment trap. All gas piping should be tested after installation in accordance with local codes.

GAS

VALVE

GAS

 

SUPPLY

UNION

TEE

FITTING

MANUAL

SHUT OFF3 INCHES

VALVEMINIMUM

NIPPLE

 

 

 

 

HEATER CABINET

 

 

 

 

 

 

CAP

Figure 3.

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 InstructionsValves Below Pool InstallationBelow or Above Pool Installation Plumbing ConnectionsReversing Headers Water ConnectionsReversible Inlet/Outlet Connection, cont’d Sediment Traps GAS Line InstallationsGAS Connections Pipe Sizing for GAS Line Connections GAS Pipe SizingGAS Pressure Requirements Testing GAS PressureIndoor Venting General Requirements Outdoor Shelter Installation Canada Indoor Installation USA onlyFits ALL Models Combustion AIR SupplyVent Adaptors 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 OperationLOW GAS Pressure Switch Safety ControlsVacuum AIR Pressure FAN Switch Water Pressure SwitchFailure to Light the BURNER-LOCK OUT Heat ModeHigh Limits Operation of Ignition ModuleSystem 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