Weil-McLain CGA25SPDN manual 6c Start-up if boiler doesn’t start, Start the boiler, Check for

Page 31

GOLD CGa Gas-Fired Water Boiler — Boiler Manual

6b Start-up — operate boiler (continued)

Start the boiler

ss&OLLOW THE ,IGHTING/PERATING )NSTRUCTIONS from

3ECTIONT  OR  to start the boiler. Remove boiler jacket door and note the gas valve manufacturer and model number. Use only the lighting/operat- ing instruction which applies to this gas valve (see 4ABLE , page 30). (The lighting instruction label on the boiler provides the same information.)

ss3EEE3ECTIONTC if boiler fails to start.

Check system and boiler

1.#HECKK SYSTEM PIPING FOR LEAKS If found, shut down boiler and repair immediately.

2.6ENTNAIRIFROM SYSTEM using manual vents. Air in the system will interfere with circulation and cause heat distribution problems and noise.

3.)NSPECTP VENT SYSTEM thoroughly for signs of deterioration from corrosion, physical damage or

SAGGING 6ERIFY THAT MASONRYOCHIMNEYMLINERS ARERIN good condition, with no obstructions, and there are no openings into the chimney.

4.#HECKKAROUND THEHBOILER for gas odor following the procedure of Section A of this manual.

5.6ERIFYIOPERATION per Section D. Perform check-out procedure in Section  and fill in the )NSTALLATION ANDNSERVICE CERTIlCATECon the same page.

%LIMINATEI ALLL SYSTEM LEAKS

#ONTINUALIFRESHEMAKEUP WATER will reduce boiler life. Minerals can build up in sections, reduc- ing heat transfer, overheating cast iron, and causing section failure.

If you discover evidence of any gas leak, shut down the boiler at once. Find the leak source with bubble test and repair im-

MEDIATELY $O NOTO STARTA BOILER again until corrected. Failure to comply could result in severe personal injury, death or sub- stantial property damage.

$O NOTO USES PETROLEUMBASED

CLEANINGNOR SEALINGLCOMPOUNDS

in boiler system. Severe damage to boiler will occur, resulting in substantial property damage.

6c Start-up — if boiler doesn’t start . . .

Check for:

1.Loose connections, blown fuse or

SERVICEVSWITCH OFF

 (IGH LIMITMSWITCH SETEBELOWLBOILER WATERTTEMPERATURE

3.Thermostat set below room tem-

PERATURE

 'ASANOT TURNED ONTAT METER OR BOILER

5.Incoming gas pressure less than:

v WCWFORCNATURALOGAS NvTWC FOR PROPANE GAS

6.If none of the above corrects the problem, refer to 4ROUBLESHOOT ing, Section  of this manual.

Part Number 550-101-009/0107

31

Page 30 Page 32
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Contents Gold CGa Other boiler components How it worksGold CGa Gas-Fired Water Boiler Contents Please read before proceeding InstallerUser Ss .ATIONAL %LECTRICAL%#ODE 1a Prepare boiler location codes & checklistInstallations must follow these codes Before locating the boiler, check the followingFoundation Residential garage installationsMinimum dimensions are v Length by 1b Prepare boiler location clearancesLine chimney with corrosion-resistant metal When removing boiler from an existing common vent system1c Prepare boiler location vent system Chimney or vent require- mentsProducts to avoid 1d Prepare boiler location air contaminationTo a, THEHBOILER #HECKETHEHBOILER Placementecompared1e Prepare boiler location air openings Air openings must be providedException for large spaces Exhaust fans and air moversMotorized air dampers Single air opening optionInspect orifices and burners 2a Prepare boiler placement and setupOrifice replacement procedure Place boiler/crate near positionPrepare boiler for test 2b Prepare boiler pressure testHydrostatic pressure test Drain and remove fittingsSpill switch installation Prepare boiler draft hood & spill switchPrepare boiler install vent piping Draft hood installationMinimum clearances 2e Prepare boiler vent damper installationInstallation Damper blade3a Water piping general information Diaphragm-type or bladder- type expansion tank Figure 3b Water piping single-zone systemClosed-type expansion tank Piping multiple zones 3c Water piping multiple zones3c Water piping multiple zones Primary/secondary preferred Bypass piping method 3d Piping low temperature systemsTemperature gauges Valve adjustment Figures 13 and 14 onlyOiler Isolation BALANCING Valves LendetemperaturemgaugeONE Valve $RAINAVALVE BOILER-bypass piping method Valve adjustment13 !IRISEPARATORRANDNAUTOMATICMVENT NIF Used .OTEOTHAT Theh SYSTEM-bypass piping method Gold CGa Gas-Fired Water Boiler Boiler Manual Propane Gas Gas pipingConnect gas supply piping to boiler Natural GasAtional %LECTRICAL #ODE !.3.&0! LATESTA EDI- tion Field wiringInstallation must comply with Wiring connectionsVerify water chemistry Freeze protection when used6a Start-up preparation Check for gas leaks Determine if water treatment is needed #LOSEOZONE Isolation VALVES Fill the system with waterInspect system water piping Inspect base insulationEfore STARTINGSTHEABOILER NDO the FOLLOWING 6b Start-up operate boilerSs 6ERIFY the Boilerhand System are Full Oflwater Check for 6c Start-up if boiler doesn’t startStart the boiler Check system and boilerCheck vent system operation 6d Start-up verify operationCheck burner flames Check vent damper operation #ALCULATEUGASAINPUT Check-out procedure checklistOO Utton Onospilloswitch PUSHEDLIN OO !IRIPURGED FROMGSYSTEMMain ignited until thermostat circuit or limit circuit 8a Operation standing pilot boilers8b Lighting instructions CGa-25 to CGa-8 8b Lighting instructions CGa-25 to CGa-8 Damper is de-energized, and cycles to closed posi 9a Operation spark-ignited pilot boilersGAS mOWSSTO Pilot or Main GAS VALVE #ALL for HEATHthermostat circuit closes9a Operation spark-ignited pilot system Schematic wiring diagram 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 Limit controls and cutoffs Gas pipingCold fill and operating pressures Air vents and air eliminationBoiler relief valve Safety relief valves should beFollowing installation, the valve Review with ownerBefore troubleshooting 11a Troubleshooting procedure #ONTINUITY CHECKER  ASAPRESSURES Check the followingEvent of vent damper failure Effikal or Field Controls damperChart 1 Standing pilot Boiler will not fire 11b Troubleshooting standing pilot boilersTroubleshooting the control module 11c Troubleshooting spark-pilot boilersControl indicator lights Lockout modes Control indicator lights NON-LOCKOUT modes11c 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 Section assembly Base Jacket Trim Controls 12a Replacement partsPart number 12b Replacement parts section assemblyIgure R Base assembly, manifold, orifices and burners 12c Replacement parts baseIgure R Jacket assembly 12d Replacement parts jacketIgure R Trim assembly 12e Replacement parts trimIgure R Gas control assembly 12f Replacement parts controls13a Dimensions DOE 13b RatingsSs 5SES E./3 .CERTIlED Dust Crespirator E.  Handling ceramic fiber and fiberglass materialsJobosite CONDITIONS #URRENT ./3 Recommen REATHING H&RESHGAIR

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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