Lochinvar 5 Cleaning boiler heat exchanger, Model Kit Part Component Number Description

Page 61

11 Maintenance (continued)

Cleaning boiler heat exchanger

For recommended materials; including brush, appropriate extension(s), refractory cover, and detailed instructions see Table 11B - Heat Exchanger Cleaning Kits.

1.Shut down boiler:

•Follow the “To Turn Off Gas to Appliance” instructions for the boiler in Section 9 - Startup.

•Do not drain the boiler unless it will be exposed to freezing temperatures. If using freeze prevention fluid in system, do not drain.

2.Allow time for the boiler to cool to room temperature if it has been firing.

3.Remove the nuts securing the heat exchanger access cover to the heat exchanger and set aside.

4.Remove the heat exchanger access cover, burner, and gas/air arm assembly.

￿WARNING The boiler contains ceramic fiber materials. Use care when handling these materials

per instructions on page 62 of this manual. Failure to comply could result in severe personal injury.

5.Remove the condensate hose from the heat exchanger end. Connect a field supplied 3/4" diameter hose to a drain pan. Using field supplied means, cover the refractory in the back of the combustion chamber of the heat exchanger.

6.Use a vacuum cleaner to remove any accumulation on the boiler heating surfaces. Do not use any solvent.

7.Brush the heat exchanger while dry using a nylon bristle brush. Caution: DO NOT use a metal brush. Re-vacuum the heat exchanger.

8.Finish cleaning using a clean cloth dampened with warm water. Rinse out debris with a low pressure water supply.

9.Allow the heat exchanger to thoroughly dry.

10.Remove the field supplied rear refractory cover from the back of the combustion chamber of the heat exchanger and reassemble.

11.Close isolation valves on piping to isolate boiler from system. Attach a hose to the boiler drain and flush boiler thoroughly with clean water by using purging valves to allow water to flow through the water make-up line to the boiler.

12.Perform start-up and check-out procedures in the Check Flame and Combustion - Section 9 - Startup on pages 45 and 47 of this manual.

13.Replace the access cover and restore boiler to operation.

Installation & Operation Manual

Table 11B

Heat Exchanger Cleaning Kits

 

 

 

 

 

Model

 

Kit

Part

Component

Number

 

Number

Number

Description

 

 

 

 

 

 

 

 

MSC20083*

Nylon 4" Wheel Brush*

 

 

 

 

SB 1.0 - 1.5

KIT30064

MSC20085

1/4" x 12" Drill Extension

 

 

 

 

 

 

 

 

MSC20086

1/4" x 24" Drill Extension

 

 

 

 

 

￿CAUTION * Do NOT use a metal brush. Only use the kit provided brush or an equivalent

replacement nylon brush.

Figure 11-3Rope Gasket - Heat Exchanger Door

ROPE GASKET

CAUTION: IF GASKET IS DAMAGED

DO NOT REUSE, THE HEAT EXCHANGER DOOR

MUST BE REPLACED.

Rope gasket is intended for sealing combustion NOTICE (FIG. 11-3). If damaged DO NOT reuse, the

heat exchanger door must be replaced. Consult factory for replacement heat exchanger door (kit WTR3086).

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Contents Save this manual for future reference Contents Please read before proceeding When servicing boilerBlowers Sync How it worksModels 1.0 1.3 Sync RatingsCloset and alcove installations Installation must comply withDetermine boiler location Before locating the boiler, check1Closet Installation Minimum Required Clearances Prevent combustion air contamination Provide air openings to roomFlooring and foundation Products to avoid When using an existing vent system to install a new boilerAreas likely to have contaminants Remove boiler from wood pallet When removing a boiler from existing common vent system5Combustion Air Through Ducts Minimum Recommended Combustion AIR Supply to Equipment Room Direct venting options Sidewall Vent General ventingDirect venting options Vertical Vent Air intake/vent connections Install vent and combustion air pipingSizing Requirements for installation in CanadaAir inlet pipe materials MaterialsOptional room air Vent pipe Material StandardVent fittings PrimerCentrotherm InnoFlue SW Duravent Polypro PolypropyleneSupplied with the vent system Stainless steel ventVent/air termination sidewall Sidewall direct ventingDetermine location 2B Alternate Clearance to Gravity Air Inlets Found in this manual Prepare wall penetrationsMultiple vent/air terminations Prepare wall penetrations Alternate Field Supplied OptionsVent/air termination vertical Vertical direct ventingPrepare roof penetrations 3Vertical Terminations with Multiple Boilers Hydronic piping Circulator sizing Near boiler piping connectionsExample Hot Water Generator pump sizingNear boiler piping components 5Single Boiler Primary/Secondary Piping Model Number of Units Manifold Pipe Sizes in Inches mm Gas connections Connecting gas supply pipingPropane Gas Natural gasCheck inlet gas supply GAS Piping Size ChartGas Pressure Gas valve replacementInstallation must comply with Field wiringLine voltage connections Outdoor temperature sensor EnableLouver proving switch Flow switch field suppliedAlarm contacts System supply sensor Wiring of the cascadeBoiler management system Runtime contacts3Low Voltage Field Wiring Connections Condensate drain Condensate disposalStart-up Freeze protection when usedCheck/control water chemistry Fill and test water systemCheck thermostat circuits Check for gas leaksInspect/fill condensate system Inspect/check condensate lines and fittingsStart the boiler Final checks before starting the boilerIf boiler does not start correctly Check system and boilerFor Your Safety Read Before Operating Natural Gas Propane Set space heating operationSet Hot Water Generator HW operation Configuration of the cascadeGeneral Operating informationProtection features Outdoor reset operation, if used Boiler temperature regulationCascade HW operation with cascade Sequence of the cascadeNight Setback operation with cascade Sequence of operation 1Status Screen Sync control moduleOperating information 2Main Menu Screen Service technician Maintenance Maintenance and annual startupOwner maintenance See the Sync User’s Information Manual for Instructions Maintenance Check water system Flue vent system and air pipingCheck expansion tank Check boiler relief valveCheck all boiler wiring Check ignition ground wiringCheck control settings Check flame signalModel Kit Part Component Number Description Cleaning boiler heat exchangerNiosh stated First Aid Handling ceramic fiber materialsLOW Voltage 120 VAC High Voltage Diagrams2Ladder DiagramPart 3Wiring Diagram Page
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