Pentair 250, 300 installation manual Warranty Information, Safety Rules, Operation

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Operation

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This instruction manual provides operating instructions, installation and service information for the MiniMax NT Low NOx high performance heater. The information in this manual applies to the MiniMax NT Low NOx 200, 250, 300, and 400 natural gas models.

It is very important that the owner/installer read and understand the section covering installation instructions, and recognize the local and state codes before installing the MiniMax NT Low NOx. History and experience has shown that most heater damage is caused by improper installation practices.

WARRANTY INFORMATION

The MiniMax NT Low NOx pool heater is sold with a limited factory warranty. Specific details are described on the back cover of this manual and a copy of the warranty and warranty registration card are included with the product. Return the warranty registration card after filling in the serial number from the rating plate inside the heater.

Pentair Pool Products’ high standards of excellence include a policy of continuous product improvement resulting in your state-of-the-art heater. We reserve the right to make improvements which change the specifications of the heater without incurring an obligation to update the current heater equipment.

Operation

SAFETY RULES

1.Spa or hot tub water temperatures should never exceed 104° F. A temperature of 100° F. is considered safe for a healthy adult. Special caution is suggested for young children.

2.Drinking of alcoholic beverages before or during spa or hot tub use can cause drowsiness which could lead to unconsciousness and subsequently result in drowning.

3.Pregnant women beware! Soaking in water above 100° F. can cause fetal damage during the first three months of pregnancy (resulting in the birth of a brain-damaged or deformed child). Pregnant women should stick to the 100° F. maximum rule.

4.Before entering the spa or hot tub, the user should check the water temperature with an accurate thermometer. Spa or hot tub thermostats may err in regulating water temperatures by as much as 4° F.

5.Persons with a medical history of heart disease, circulatory problems, diabetes or blood pressure problems should obtain their physician's advice before using spas or hot tubs.

6.Persons taking medication which induce drowsiness, such as tranquilizers, antihistamines or anticoagulants should not use spas or hot tubs.

WARNING

Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance. Do not use this heater if any part has been under water. Immediately call a qualified service technician to inspect the heater and to replace any part of control system and gas control which has been under water.

P/N 471593

Rev. C 11-1-01

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Contents MiniMax NT Low NOx Series For additional free copies of this manual call 800Table of Contents MiniMax NT Low NOx Code RequirementsSafety Rules Warranty InformationOperation For Your Safety Read Before Lighting Operation LightingInstallation Instructions SpecificationsInstallation Electrical ELECTRICAL, ALL HSI UnitsWire Remote TWO-WIRE or THREE-WIRE Remote HOOK-UPInstallation Remotes Three-wire remote Installation Single Voltage WiringInstallation Single VoltageCode or Superceding Local Wiring Codes MiniMax NTLowPlumbing Water ConnectionsPlumbing Connections GAS Connections Installation Indoor Indoor VENTING-General RequirementsSee page 17 for Indoor Vent Adaptors Indoor Vent Adaptors Fits ALL Models Installation IndoorInstallation Outdoor VentilationBasic System Operation General DescriptionBasic Operation Safety Controls AIR Pressure FAN SwitchWater Pressure Switch Typical Water Pressure SwitchOperation of Ignition Module Pentair Temperature Controller 7800 Layout GeneralBasic Thermostat Operation Normal Operation no RemoteTime Setting To Change the Factory Temperature SettingsTemperature & Time Setting Programming Time SETTING, cont’d Time Setting ProgrammingMaintenance Instructions MaintenanceEnergy Saving Tips Spring and Fall OperationMaintenance Water Treatment Chemical BalancePool and SPA Water If pH becomes too high over alkaline, it has these effectsTroubleshooting-Normal Operation Sequence of Heater Normal Operation SequenceTroubleshooting-Normal Operation of Heater Power Service Current Temp SET TEMP/TIMETroubleshooting & Service Service Checks Service CHECKS-IGNITION ModuleFlame Sensor Current Check Troubleshooting General Heater Short Cycling Rapid On and Off OperationMinimax NT LOW NOx Heater Single Voltage Description QTY Minimax NT LOW NOx Heater Dual Voltage MiniMax NT Low NOx Dual Voltage Replacement parts Rev. C Rev. C Rev. C MiniMax NT Low NOx Heaters Limited Warranty