Raypak 336A User Manual

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INSTALLATION & OPERATING

INSTRUCTIONS

Gas-Fired

Pool & Spa

Heater

Catalog No. 6000.59U Effective: 10-06-10 Replaces: 06-10-10 P/N 241236 Rev. 22

WARNING: If these instructions are not followed exactly, a fire or explosion may result

causing property damage, personal injury or death.

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 sup-

plier's instructions.

• If you cannot reach your gas supplier, call the fire department.

Installation and service must be performed by a qualified installer, service agency or

the gas supplier.

This manual should be maintained in legible condition and kept adjacent to the heater or in a safe place for future

reference.

Atmospheric Models

206A, 266A, 336A & 406A

Lo NOx Models

207A, 267A, 337A & 407A

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of

this or any other appliance.

Table of Contents

Other manuals for Raypak 336A

Installation And Operation Manual52 pages

Questions and Answers:

J
Jessica MooreAug 22, 2025
Why is my Raypak 336A Gas Heater turning on and off repeatedly?
- C
  Charlene LongAug 22, 2025
  If your Raypak Gas Heater is going on and off continuously, the issue could stem from a few different causes. The filter might be dirty, requiring a cleaning or replacement. The water level in your pool might be too low, so try raising it. The external bypass setting may be out of adjustment, requiring an adjustment. Lastly, the pressure switch could be out of adjustment, and you should adjust it.
E
Elizabeth RandolphAug 23, 2025
Why does my Raypak 336A have a yellow lazy flame?
- T
  Trevor BaileyAug 25, 2025
  If your Raypak Gas Heater is producing a yellow, lazy flame, it could be due to low gas pressure, in which case you should adjust the gas pressure. Another potential cause is insects or debris clogging the burner intake ports; if this is the case, clean the burners.
C
Cheryl VasquezAug 25, 2025
What to do if the combustion fan is not running on my Raypak 336A Gas Heater?
- J
  Jessica GardnerAug 26, 2025
  If the combustion fan in your Raypak Gas Heater is not running, it could be due to several reasons. The fan relay might be faulty, so replace it. There might be a loose connection or a failed motor in the fan itself. A burned motor due to incorrect wiring could also be the cause, so replace the blower. Finally, the air pressure switch might need replacement.
H
huangcarolynAug 27, 2025
What to do if my Raypak 336A Gas Heater takes too long to heat pool or spa?
- X
  Xavier SalazarAug 27, 2025
  If your Raypak Gas Heater is taking too long to heat your pool or spa, consider these potential causes: * The heater might be undersized. Calculate the heating capacity of the heater using the formula: Heater output (BTUH) = Pool gallonage x 8.33, or refer to the heater sizing chart. * The filter might not be running long enough; reset the time clock. * The filter could be dirty; clean the filter. * The gas line or meter may be undersized; refer to the installation instructions.
O
Olivia LoveAug 27, 2025
What to do if Raypak Gas Heater combustion fan is not running?
- T
  timothyperezAug 27, 2025
  If the combustion fan in your Raypak Gas Heater isn't running, it could be due to a few reasons. The fan relay might be faulty, requiring replacement. There could be a loose connection or a failed motor in the fan itself. A burned motor due to incorrect wiring could also be the cause, necessitating blower replacement. Finally, the air pressure switch might need replacing.
M
michaeljimenezAug 28, 2025
Why does my Raypak Gas Heater take so long to heat my pool or spa?
- T
  Tammy HollowayAug 29, 2025
  If your Raypak Gas Heater takes too long to heat your pool or spa, several factors could be at play. It may be that the heater is undersized. You can calculate the heating capacity of your heater using the formula: Heater output (BTUH) / (Pool gallonage x 8.33), or refer to the heater sizing chart. Remember that this calculation doesn't account for heat loss due to weather. The filter may not be running long enough, so try resetting the time clock. A dirty filter could also be the culprit, so try cleaning it. Finally, the gas line or meter might be undersized.
D
Debra HarrisAug 30, 2025
What causes sooting in my Raypak 336A Gas Heater?
- D
  Daniel SandersAug 30, 2025
  If your Raypak Gas Heater is sooting, it could be due to several reasons. High flow rates might be the cause; reduce them by adding a manual bypass valve and adjust it until the heater outlet water temperature is between 105°F and 110°F. The U.G. might be inoperative; check its movement by putting it in hot water (110°F or higher), and replace it if there's no movement. Air starvation could be the issue. Improper venting could also cause sooting. Insects or debris clogging the burner intake ports can also lead to sooting; clean the burners in this case.
K
Kevin MckinneyAug 31, 2025
What to do if the outer jacket of my Raypak 336A is very hot and the paint is blistered?
- R
  Ronald GouldAug 31, 2025
  If the outer jacket of your Raypak Gas Heater is very hot and the paint is blistered, it could be due to a broken refractory caused by shipping damage or improper combustion, in which case you should replace the refractory panels. Another cause could be excessive sooting of the heat exchanger; determine the cause of sooting and correct it.
C
Carolyn HowardSep 1, 2025
What causes a pilot outage or weak flame signal in my Raypak 336A Gas Heater?
- B
  Bradley MathewsSep 1, 2025
  If you're experiencing a pilot outage or a weak flame signal in your Raypak Gas Heater, it could be due to low gas pressure, so adjust the gas pressure. It could also be due to a restricted or dirty pilot, so clean the pilot and/or electrode. Alternatively, the pilot generator might be weak, in which case you should replace the pilot.
C
Clinton KingSep 2, 2025
How to fix harmonics or whining noise coming from my Raypak 336A?
- D
  David LarsonSep 3, 2025
  If your Raypak Gas Heater is producing harmonics or a whining noise, it could be due to several reasons. The U.G. might be inoperative; check its movement by putting it in hot water (110°F or higher), and replace it if there's no movement. There might be debris or a restriction in the system; locate the restriction and remove it, then flush and clean the system. Debris in the gas line could also be the cause; remove the debris or blow out the gas line. Low flow could also be the problem; scale may be forming in the heat exchanger, so clean the heat exchanger and check the pool's pH and total alkalinity.

Raypak 336A Specifications

General

Model	336A
Category	Gas Heater
Heating Capacity	336, 000 BTU/hr
Fuel Type	Natural Gas or Propane
Heat Exchanger Material	Copper
Ignition Type	Electronic
Efficiency	82%
Water Connection Size	2 inches
BTU Output	336, 000 BTU/hr
Minimum Water Flow Rate (GPM)	30 GPM
Max Working Pressure (PSI)	50 PSI

Summary

OWNER'S OPERATING INSTRUCTIONS

START-UP PROCEDURES

Step-by-step guide for initial heater operation and checks.

MAINTENANCE AND CARE PROCEDURES

Instructions for routine upkeep, cleaning, and seasonal care.

COLD WEATHER OPERATION AND WINTERIZING

Guidelines for operating in cold climates and preparing for winter.

INSTALLATION AND SERVICE INSTRUCTIONS

GENERAL SPECIFICATIONS AND DIMENSIONS

Technical data, ratings, and physical dimensions for heater models.

INSTALLATION GUIDELINES

Requirements for clearances, ventilation, gas, and electrical connections.

PLUMBING AND WATER CONNECTIONS

Diagrams and instructions for connecting the heater to pool/spa water systems.

ELECTRICAL WIRING AND DIAGRAMS

Procedures and schematics for connecting power to millivolt and digital models.

SERVICING INSTRUCTIONS

GENERAL LOCATION OF CONTROLS

Identification of key components on atmospheric and Lo NOx models.

THERMOSTAT OPERATION

How to operate the digital thermostat for pool and spa settings.

PROGRAM BUTTON FUNCTIONS AND SETTINGS ADJUSTMENT

Accessing program modes, defaults, and temperature scale settings.

DIAGNOSTICS AND FAULT CODES

Interpreting error messages and status codes for troubleshooting.

REMOTE CONTROL OPERATION AND WIRING

Installing and configuring external remote controls for heater operation.

COMMON SERVICE PROCEDURES

Step-by-step guides for component removal and maintenance.

LO NOx POOL HEATER SPECIFIC PROCEDURES

Operation, start-up, and adjustments specific to Lo NOx models.

TROUBLESHOOTING

MECHANICAL TROUBLESHOOTING

Identifying and resolving common mechanical problems and their causes.

ELECTRICAL TROUBLESHOOTING

Checking and diagnosing issues with millivolt and electronic ignition systems.

DIGITAL/AFT CONTROL LOGIC FLOW CHART

Visual guide for diagnosing control board issues and sensor faults.

REPLACEMENT PARTS

ATMOSPHERIC HEATER PARTS

Illustrated parts lists and order numbers for atmospheric models.

LO NOx HEATER PARTS

Illustrated parts lists and order numbers for Lo NOx models.

PILOT ASSEMBLY COMPONENTS

Specific parts related to the pilot ignition system for various models.

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