Weil-McLain CGA25SPDN Boiler heating surfaces, Oiled-bearing circulators, Repair.URNERSNANDRBASE

Page 46

GOLD CGa Gas-Fired Water Boiler — Boiler Manual

10b Service & maintenance – annual start-up (cont.)

OInspect . . .

Boiler heating surfaces

 $ISCONNECT THEHVENT PIPE AT THEHBOILER DRAFTAHOOD and remove draft hood after turning off power to the boiler.

2.Use a bright light to inspect the boiler flue collector and heating surfaces.

3.If the vent pipe or boiler interior surfaces show evidence of soot, follow #LEANING BOILER HEATINGT SURFACES in this manual section. Remove the flue collector and clean the boiler if necessary after closer inspection of boiler heating surfaces.

4.If there is evidence of rusty scale deposits on boiler surfaces, check the water piping and control system to make sure the boiler return water temperature is properly maintained (per this manual).

5.Reconnect vent and draft hood. Replace all boiler components before returning to service.

 #HECKEINSIDE ANDNAROUND BOILER FOROEVIDENCE OF ANYN

leaks from the boiler. If found, locate source of leaks

and repair."URNERSNANDRBASE

The boiler contains ceramic fiber and fiberglass materials. Use care when handling these materials per instructions on PAGE  of this manual. Fail- ure to comply could result in severe personal injury.

2.Inspect burners and all other components in the boiler base.

3.If burners must be cleaned, raise rear of each burner to release from support slot, slide forward and remove. Then brush and vacuum the burners thoroughly, making sure all ports are free of debris.

#AREFULLYFREPLACELALLLBURNERS MAKING SURE BURNER with pilot bracket is replaced in its original position and all burners are upright (ports up).

4.Inspect the base insulation.

a.Pay attention to the 7!2.).'3)on page 68 regarding working with insulation materials.

B 6ERIFY THATYTHETINSULATION ISEINTACT AND SECUREI

against all four sides of the base.

OService . . .

Oiled-bearing circulators

 4HEHCIRCULATOR SHIPPEDPWITH THEH#'A'BOILER IS WATER LUBRICATEDC.O OILINGIS REQUIRED

 #HECKE OTHERH CIRCULATORSL IN THEH SYSTEMT /ILI ANY

circulators requiring oil, following circulator man- ufacturer’s instructions. Over-oiling will damage the circulator.

OStart-up . . .

1.Perform all start-up procedures given in Section  of this manual.

If insulation is damaged or displaced, do not operate the boiler. Replace or reposi- tion insulation as necessary. Failure to replace damaged insulation can result in a fire hazard, causing severe person- al injury, death or substantial property damage.

1.After turning off power to the boiler, remove the jacket door and base access panel (&IGURE , item , page 62).

 6ERIFY COLD lLLL PRESSURE is correct and that fill system is working properly.

 6ERIFY ANTIFREEZEELEVEL (if used) is at the right con- centration and that inhibitor level is correct.

4.#HECKKGASAPIPING, per manual Sections  and 6, verifying no indications of leakage and all piping and connections are in good condition.

5.Read the ,IGHTING OR /PERATINGA INSTRUCTIONS

(manual Section OR ) applying to the boiler.

6.Start the boiler following appropriate ,IGHTING OR /PERATINGAINSTRUCTIONS (manual Section OR ).

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Part Number 550-101-009/0107

Page 45 Page 47
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Page 45 Page 47
Contents Gold CGa How it works Other boiler componentsGold CGa Gas-Fired Water Boiler Contents Please read before proceeding InstallerUser Before locating the boiler, check the following 1a Prepare boiler location codes & checklistInstallations must follow these codes Ss .ATIONAL %LECTRICAL%#ODE1b Prepare boiler location clearances Residential garage installationsMinimum dimensions are v Length by FoundationChimney or vent require- ments When removing boiler from an existing common vent system1c Prepare boiler location vent system Line chimney with corrosion-resistant metal1d Prepare boiler location air contamination Products to avoidAir openings must be provided THEHBOILER #HECKETHEHBOILER Placementecompared1e Prepare boiler location air openings To a,Single air opening option Exhaust fans and air moversMotorized air dampers Exception for large spacesPlace boiler/crate near position 2a Prepare boiler placement and setupOrifice replacement procedure Inspect orifices and burnersDrain and remove fittings 2b Prepare boiler pressure testHydrostatic pressure test Prepare boiler for testDraft hood installation Prepare boiler draft hood & spill switchPrepare boiler install vent piping Spill switch installationDamper blade 2e Prepare boiler vent damper installationInstallation Minimum clearances3a Water piping general information Diaphragm-type or bladder- type expansion tank Figure 3b Water piping single-zone systemClosed-type expansion tank 3c Water piping multiple zones Piping multiple zones3c Water piping multiple zones Valve adjustment Figures 13 and 14 only 3d Piping low temperature systemsTemperature gauges Primary/secondary preferred Bypass piping methodOiler Isolation BALANCING Valves LendetemperaturemgaugeONE Valve $RAINAVALVE Valve adjustment BOILER-bypass piping method13 !IRISEPARATORRANDNAUTOMATICMVENT NIF Used .OTEOTHAT Theh SYSTEM-bypass piping method Gold CGa Gas-Fired Water Boiler Boiler Manual Natural Gas Gas pipingConnect gas supply piping to boiler Propane GasWiring connections Field wiringInstallation must comply with Ational %LECTRICAL #ODE !.3.&0! LATESTA EDI- tionCheck for gas leaks Determine if water treatment is needed Freeze protection when used6a Start-up preparation Verify water chemistryInspect base insulation Fill the system with waterInspect system water piping  #LOSEOZONE Isolation VALVESEfore STARTINGSTHEABOILER NDO the FOLLOWING 6b Start-up operate boilerSs 6ERIFY the Boilerhand System are Full Oflwater Check system and boiler 6c Start-up if boiler doesn’t startStart the boiler Check forCheck vent damper operation 6d Start-up verify operationCheck burner flames Check vent system operationOO !IRIPURGED FROMGSYSTEM Check-out procedure checklistOO Utton Onospilloswitch PUSHEDLIN  #ALCULATEUGASAINPUT8a Operation standing pilot boilers Main ignited until thermostat circuit or limit circuit8b Lighting instructions CGa-25 to CGa-8 8b Lighting instructions CGa-25 to CGa-8 #ALL for HEATHthermostat circuit closes 9a Operation spark-ignited pilot boilersGAS mOWSSTO Pilot or Main GAS VALVE Damper is de-energized, and cycles to closed posiSchematic wiring diagram Spark-ignited pilot system 9a Operation spark-ignited pilot systemLadder wiring diagram Spark-ignited pilot system 9b Operating instructions CGa-25 to CGa-8 9b Operating instructions CGa-25 to CGa-6 9b Operating instructions CGa-25 to CGa-6 9b Operating instructions CGa-7 to CGa-8 Service technician 10a Service and maintenance scheduleOwner maintenance 10b Service & maintenance annual start-up Oiled-bearing circulators Boiler heating surfacesRepair.URNERSNANDRBASE Air vents and air elimination Gas pipingCold fill and operating pressures Limit controls and cutoffsReview with owner Safety relief valves should beFollowing installation, the valve Boiler relief valveBefore troubleshooting 11a Troubleshooting procedure #ONTINUITY CHECKER Effikal or Field Controls damper Check the followingEvent of vent damper failure  ASAPRESSURES11b Troubleshooting standing pilot boilers Chart 1 Standing pilot Boiler will not fireControl indicator lights NON-LOCKOUT modes 11c Troubleshooting spark-pilot boilersControl indicator lights Lockout modes Troubleshooting the control module11c Troubleshooting spark-pilot boilers Tstat Circ Usually indicates 48 VAC on thermostat circuit stray voltage Chart 4 Spark-ignited pilot Damper light flashing Chart 5 Spark-ignited pilot Flame & Power lights flashing Item 8 , Verify Sequence 12a Replacement parts Section assembly Base Jacket Trim Controls12b Replacement parts section assembly Part number12c Replacement parts base Igure R Base assembly, manifold, orifices and burners12d Replacement parts jacket Igure R Jacket assembly12e Replacement parts trim Igure R Trim assembly12f Replacement parts controls Igure R Gas control assembly13a Dimensions 13b Ratings DOEREATHING H&RESHGAIR Handling ceramic fiber and fiberglass materialsJobosite CONDITIONS #URRENT ./3 Recommen Ss 5SES E./3 .CERTIlED Dust Crespirator E. 

CGA25SPDN specifications

The Weil-McLain CGA25SPDN is a high-efficiency gas-fired boiler designed to deliver dependable heating performance while maintaining a strong focus on energy savings and user-friendly operation. Ideal for residential applications, this boiler is engineered to provide consistent warmth and comfort in homes with various heating demands.

One of the main features of the CGA25SPDN is its durable construction. Built with high-quality materials, this boiler is designed to withstand the rigors of frequent operation while maximizing longevity. It features an advanced cast iron heat exchanger that efficiently transfers heat to the water, resulting in lower energy costs and improved overall performance.

Efficiency is a key characteristic of the Weil-McLain CGA25SPDN. Its design promotes efficient combustion, allowing for a higher Annual Fuel Utilization Efficiency (AFUE) rating. With an AFUE rating of up to 82%, this boiler ensures that more of the fuel used is converted into usable heat, which translates to reduced energy bills for homeowners.

The boiler exhibits a user-friendly control system that allows for easy operation and maintenance. It comes equipped with an integrated vent damper that maximizes efficiency by reducing heat loss during standby periods. Additionally, the CGA25SPDN features an adjustable thermostat, enabling homeowners to customize their heating preferences easily.

Another significant feature of the CGA25SPDN is its versatility. The boiler is compatible with various heating applications, including hot water heating systems and home heating configurations. This adaptability makes it a great choice for both new installations and retrofitting existing systems.

Safety is always a concern with gas-fired appliances, and the Weil-McLain CGA25SPDN addresses this through its advanced safety mechanisms. The boiler incorporates safety controls that prevent overheating and ensure proper operation, providing peace of mind to homeowners.

In summary, the Weil-McLain CGA25SPDN stands out as a reliable and efficient heating solution for residential settings. With its durable construction, high-efficiency performance, user-friendly controls, and impressive safety features, it is an exceptional choice for those seeking a dependable gas-fired boiler that meets modern heating demands while keeping energy costs in check. Homeowners can trust the Weil-McLain CGA25SPDN for warmth and comfort through the cold months.
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