Raypak 0042B, 0066B Repair Procedures, Tube Cleaning Procedure Typical, Heat Exchanger Removal

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Burner Tray Removal

1.Shut-off power and gas supply to the boiler. Disconnect union(s) and pilot tubing when pres- ent; then loosen and remove burner hold-down screws.

2.Disconnect wires at gas valve and slide burner tray out.

Main Burner and Orifice Removal

1. Remove screws and burner hold-down bracket.

NOTE: If the heat exchanger is sooted badly, the burner hold-down bracket and spacer can become distorted from direct flame impingement and this usually necessitates replacement of these parts.

2.Lift burners from slotted spacer and slide from ori- fices. Clean with a wire brush.

3.Orifices usually do not need to be replaced. To clean, run either copper wire or wood through ori- fice. Do not enlarge hole. To remove orifice, use a socket wrench and remove the manifold. DO NOT over-tighten when reinstalling.

REPAIR PROCEDURES

Tube Cleaning Procedure (Typical)

Establish a regular inspection schedule, the frequency of which depends on the local water condition and severity of service. Do not let the tubes clog up solid- ly. Clean out deposits over 1/16" in thickness.

To clean the tubes, remove the heat exchanger, ream tubes and immerse heat exchanger in non-inhibited de-scale solvent.

Heat Exchanger Removal

1.Shut water, gas and electricity off, close valves, relieve pressure and remove relief valve. Remove front inspection panel.

2.Remove top holding screws.

3.Remove draft diverter, lift and remove top and flue collector on stack type models.

4.Loosen bolts and disconnect flange nuts on inlet/outlet header, loosen union(s) at gas pipe, and slide boiler away from piping until studs clear the heater.

5.Lift heat exchanger straight up using caution not to damage refractory.

 

RAYPAKTUBECLEANINGKIT

 

 

Extension Pieces (5)

Auger with Carbide Tip

Wire Brush

 

 

 

 

5/8" - PN 052871F

 

7/8" - PN 052870F

 

 

Fig. 35: Raypak Tube Cleaning Kit

 

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Contents Raytherm Residential Boilers Page Contents Pay Attention to These Terms PropositionGeneral Specifications Receiving EquipmentInput Heating Net Piping Connections CapacityGas NPT RatingInstallation Code RequirementsMounting Base Clearance RequirementsModel No Combustion/Ventilation AirModel No Sq. in. of Free Area Model No Vent Max Connector Horizontal Diameter Length ft Venting ConnectionsCommon Vents Roof Pitch X/12 Min. ftVent Damper Installation Location Vent Damper LocationMounting Vent Damper OperationFlair Damper AbbreviationDescriptionVent Damper Water Connections & System Piping Gas Supply ConnectionsGas Pressure Model No System Flow Max. System Gpm Head ft/WC Piping Diagrams Single-Zone PipingElectrical Wiring Wiring Diagrams Page Page Single-Zone Taco Valve System with Three 3 Zone Pumps Primary/Secondary Pumping System Honeywell Zone Valve IID Units with Low Water Cut-off Device Servicing Procedures Sequence OperationGeneral Location of Controls Intermittent Ignition Device IIDSTART-UP Procedures Lighting the BoilerFor Standing Pilot Models Filling the SystemTo Turn Off Gas to the Boiler Models 90, 135 For Automatic Ignition ModelsShut-down Procedure To Turn Off Gas to the BoilerFor Honeywell valve Turn gas control knob For Honeywell valveTesting the Ignition Safety Shut-off Safe Shut-down TestsInspection Procedures Low Water Cut-Off When InstalledProcedure for Cleaning Flue Gas Passageways BurnersRepair Procedures Tube Cleaning Procedure TypicalHeat Exchanger Removal Burner Tray RemovalHeat Exchanger Re-assembly Combustion Chamber RemovalTroubleshooting Problem Causes SolutionsPiping Adjustment & Replacement of Components Replacement Parts List Fast-Response Temperature Sensor Module ReplacementFast-Response Temperature Sensor Probe Replacement Circulator ReplacementLimited Parts Warranty
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