Raypak 407A, 406A, 206A, 337A, 336A, 207A, 267A, 266A Pilot Removal, Combustion Blower Removal

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LOW NOx HEATERS (CONTINUED)

BAFFLE

COMBUSTION

AIR BLOWER

MOUNTED INLET SIDE

 

MAIN BURNER AND ORIFICE REMOVAL

1.

Remove burner tray, following above procedure.

2.

Remove pilot. See pilot removal procedure.

3.

Remove (8) total screws from the burner hold-

 

down brackets, front and rear of tray.

PILOT

LOW NOx

BURNER

BURNER

HOLD-DOWN

BRACKET

GAS ORIFICE

GAS VALVE

4.

Remove (8) total screws from the left and right

 

sides of the manifold assembly. Detach the air/gas

 

manifold assembly from the burner tray assembly.

5.

Remove burners by raising them straight up off the

 

rear end slots.

6.

Use a long 9/16” socket wrench to remove orifice

 

from the gas manifold.

7.

Reverse above procedure to reinstall.

Low NOx Burner Tray

BURNER TRAY REMOVAL

1.Shut off main electrical power switch to heater.

2.Shut off gas upstream of heater.

3.Remove front door.

4.Disconnect gas line from gas valve.

5.Remove (2) screws that mount burner tray to the base of the unit, and (2) screws that mount the blower box to the burner tray, and (1) screw that secures the anti-rotation bracket to the heater.

6.Disconnect wires that terminate at gas valve.

7.Unscrew (4) screws that secure the control box.

8.Disconnect pilot wire from the pilot assembly.

9.Disconnect wire connector from the combustion blower.

10.Carefully slide out the burner tray assembly.

11.Reverse above procedure to reinstall.

GAS VALVE REMOVAL

1.Remove burner tray, following above procedure.

2.Disconnect, pilot tubing from gas valve.

3.Remove (2) screws that mount anti-rotation bracket to the burner tray.

4.Turn vertical gas pipe from manifold slightly and unscrew gas valve.

5.Reverse above procedure to reinstall.

Low NOx Horizontal Pilot

PILOT REMOVAL

1.Disconnect pilot tubing from gas valve.

2.Remove the pilot wire from the pilot assembly.

3.Remove (2) screws that mount the pilot assembly to the burner tray.

4.Pull the pilot assembly downwards and outwards.

5.Reverse above procedure to reinstall.

COMBUSTION BLOWER REMOVAL

1.Remove the (2) screws that secure the blower box to the burner tray.

2.Remove (2) screws that mount the blower box to the base of the heater.

3.Disconnect wire connector from the combustion blower.

4.Carefully remove blower box with combustion blower.

5.Remove (2) screws that secure combustion blow- er to blower box.

6.Reverse above procedure to reinstall.

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Contents Installation and Operating Instructions What to do if YOU Smell GASWater Chemistry MaximumContents START-UP Procedures For Your Safety Read Before OperatingBefore START-UP Burners Water Millivolt System Electronic Ignition System Operating Instructions and SHUT-OFF ProceduresSHUT-OFF Procedures Automatically Lighted PilotWater Pressure Switch After START-UPVisual Inspection Atmospheric Heaters If Heater will not Fire Maintenance and Care ProceduresSee plumbing diagram Pool & SPA Water ChemistryImportant Freeze Information Cold Weather OperationWinterizing the Pool & SPA Heater Part TWO Installation and Service Instructions Receiving EquipmentImportant Notice General SpecificationsInstallation Instructions Code RequirementsClearances Outdoor InstallationOutdoor Heater Installation ALL Heaters10 ft Florida Building Code Wind Speed = 150 MPH, 3 Second Gust Exposure = CIndoor Heater Installation Outdoor Stack Indoor StackSpecifications and Dimensions Atmospheric UnitsLow NOx Units Model Square Inches Power Vent Kit Model Part NoCombustion and Ventilation AIR Indoor Units Only Vent PipingB149.1 and B149.2 GAS Supply ConnectionsGAS Pressure Adjustment Locations GAS Pressure RegulatorPipe Sizing for GAS Connections Plumbing for Water Connections Flow RatesPolymer Headers Cast Iron Headers Asme INLET/OUTLET Header Asme INLET/OUTLET Header PolymerCast Iron Headers Asme Models Unitherm Governor OperationAuxiliary Bypass Valve Adjustment External Auxiliary Bypass ValveCast Iron Header Asme Models Heat Exchanger Reversal Procedure Standard Models Fig. #4Digital Models Electrical WiringMillivolt Models AtmosphericTransformer Wiring VAC Wiring 120V Atmospheric Heater240V Atmospheric Heater Wiring Diagram Millivolt Mechanical Thermostat Wiring Diagram Digital Models Atmospheric Wiring Diagram Digital Models LOW NOx Servicing Instructions General Location of Controls AtmosphericLOW NOx Control Adjustments Digital Models Control Adjustments Millivolt ModelsControl Panel Removal Digital Thermostat Controls Thermostat Control OperationProgram Button SETdef Default SettingsRESfl Reset Fault History Cfff Fahrenheit to CelsiusStatus Codes Program Modes Diagnostics Reading a FaultFault Codes Display DefinitionRemote Control Installation and Operation Remote OperationActivating the Remote Remote Control Wiring Wire Remote Control On-OffPilot Safety Digital Models Flame ROLL-OUT Safety SwitchPilot Safety Millivolt Models High LimitsGAS Valve Removal Pilot Removal and CleaningBurner Tray Removal Main Burner and Orifice RemovalImmersion Well Replacement Tube Cleaning ProcedureDesooting Procedure Unitherm Governor U.G. ReplacementOperation Blower AdjustmentLOW NOx Pool Heaters Visual InspectionPilot Removal Combustion Blower RemovalTroubleshooting MechanicalPage Electrical Electronic Ignition IID For qualified technicians onlyDigital Control Logic Flow Chart YESReplacement Parts ManufacturerEastman Avenue OXNARD, CA Atmospheric Heaters LOW NOx Heaters IID LOW NOx Pilot Call OUT Description Call OUT Description Sheetmetal Call OUT Description 267A