Pentair MasterTemp 250 User Manual

Rev. N 10/2018 MASTERTEMP Pool and Spa Heater Installation and User’s Guide
1
INSTALLATION AND USER’S GUIDE
®
MASTERTEMP POOL AND SPA HEATER
DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity
of this or other appliances.
FORFOR
FORFOR
FOR
YOURYOUR
YOURYOUR
YOUR
SAFETYSAFETY
SAFETYSAFETY
SAFETY
Improper installation, adjustment, alteration, service or maintenance can cause
propertydamage, personal injury or death. Installation and service must be performed by
a qualified installer, service agency or the gas supplier.
WHAT TO DO IF YOU SMELL GASWHAT TO DO IF YOU SMELL GAS
WHAT TO DO IF YOU SMELL GASWHAT TO DO IF YOU SMELL GAS
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor's phone.
Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire department.
1620 Hawkins Ave., Sanford, NC 27330 • (800) 831-7133 or (919) 566-8000
10951 W. Los Angeles Ave., Moorpark, CA 93021
• (800) 831-7133 or (805) 553-5000
Models Natural Propane
175K BTU/HR 460792 460793
200K BTU/HR (ASME) 461000 461001
200K BTU/HR 460730 460731
200K BTU/HR (HD ASME) 461032 –
250K BTU/HR 460732 460733
250K BTU/HR (HD) 460806 –
250K BTU/HR
(ASME) 460771 460772
250K BTU/HR (HD ASME) 461020 –
300K BTU/HR 460734 460735
400K BTU/HR 460736 460737
400K BTU/HR (HD) 460805 –
400K BTU/HR (ASME) 460775 460776
400K BTU/HR (HD ASME) 461021 –
FOR YOUR SAFETYFOR YOUR SAFETY
FOR YOUR SAFETYFOR YOUR SAFETY
FOR YOUR SAFETY - This product must be installed and serviced by authorized personnel, qualified inpool/spa
heater installation. Improper installation and/or operation can create carbon monoxide gas and flue gases which can
cause serious injury, property damage, or death. For indoor installations, as an additional measure of safety, Pentair
Water Pool and Spa strongly recommends installation of suitable
Carbon Monoxide detectorsCarbon Monoxide detectors
Carbon Monoxide detectorsCarbon Monoxide detectors
Carbon Monoxide detectors in the vicinity of this
appliance and in any adjacent occupied spaces. Improper installation and/or operation will void the warranty.
FOR YOUR SAFETY - READ BEFORE OPERATINGFOR YOUR SAFETY - READ BEFORE OPERATING
FOR YOUR SAFETY - READ BEFORE OPERATINGFOR YOUR SAFETY - READ BEFORE OPERATING
FOR YOUR SAFETY - READ BEFORE OPERATING
If you do not follow these instructions exactly, a fire or explosion may result, causing
property damage, personal injury or loss of life. For additional free copies of this manual;
call (800) 831-7133.
Pentair Water Pool and Spa, Inc.
OWNER:OWNER:
OWNER:OWNER:
OWNER:
Retain ForRetain For
Retain ForRetain For
Retain For
FutureFuture
FutureFuture
Future
ReferenceReference
ReferenceReference
Reference
120/240 VAC NATURAL GAS/LP GAS120/240 VAC NATURAL GAS/LP GAS
120/240 VAC NATURAL GAS/LP GAS120/240 VAC NATURAL GAS/LP GAS
120/240 VAC NATURAL GAS/LP GAS

Pentair MasterTemp 250 Specifications

General

BTU Output	250, 000 BTU/hr
Fuel Type	Natural Gas or Propane
Efficiency	82%
Ignition	Electronic
Model	MasterTemp 250
Minimum Water Flow	20 GPM
Max Working Pressure	50 psi
Water Connections	2-inch
Certifications	ANSI Z21.56
Voltage	120 VAC

Summary

Warning and Safety Information

Important Safety Instructions

Crucial directives for safe installation, operation, and maintenance of the heater.

Consumer Information and Safety

Safety guidelines for users regarding water temperature and gas hazards.

Installation Instructions

Plumbing Connections

Gas Connections

Procedures and requirements for connecting the heater to the gas supply.

Gas Pressure Requirements

Outdoor Installation Venting Guidelines

Indoor Venting - General Requirements

Vertical Venting - Negative Pressure

Horizontal or Vertical Venting - Positive Pressure

Final Installation Check

Electrical Connections

Procedures for safely connecting the heater to the power supply.

Operation Instructions

Start-Up and Operation

Detailed instructions for the initial startup and ongoing operation of the heater.

Operating Instructions

Step-by-step guide for turning the heater on, setting temperature, and normal operation.

Safety Controls

Explanation of safety devices like AFS, water pressure switch, and high limits.

Operating the Control Panel

Temperature Setting

Troubleshooting

Initial Troubleshooting

Preliminary checks and steps to diagnose common heater issues.

Heater Will Not Fire - A

Troubleshooting chart for diagnosing why the heater fails to ignite or start.

Heater Will Not Fire - B

Further diagnostic steps for heater ignition and operation failures.

Heater Will Not Fire - C

Troubleshooting steps for ignition failures related to electrical components.

Heater Will Not Fire - D

Diagnostic guide for ignition failures involving the igniter and gas pressure.

Diagnostic LED's: AGS, AFS, HLS, PS, THERMISTOR

Interpreting diagnostic LED indicators for specific safety switches.

Diagnostic LED's: SFS

Interpreting diagnostic LED indicators for the Stack Flue Sensor.

Burner Troubleshooting

Identifying and resolving issues related to burner flame and operation.

Heat Exchanger Troubleshooting

Diagnosing problems related to the heat exchanger and water flow.

Maintenance

Care and Maintenance

Winter Operation

Chemical Balance