Weil-McLain CGA25SPDN manual Oiler Isolation BALANCING Valves, ONE Valve $RAINAVALVE

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GOLD CGa Gas-Fired Water Boiler — Boiler Manual

3d Piping — low temperature systems (continued)

1"OILER ISOLATION BALANCING VALVES

2Flow/check valve

3System or zone circulator (circulator should cycle with zone valve and switches, using circulator valve or zone control panel)

4System temperature gauges

5:ONE VALVE

6$RAINAVALVE

7System temperature valves (see instructions to the left for adjusting valves)

8"LENDETEMPERATUREMGAUGE

9Relief valve

10Automatic air vent (with diaphragm-type expansion tank), or connect to tank fitting (closed-type expan- sion tank). DO NOT use an automatic air vent when using closed-type expansion tank. It would allow air to leave the system, causing waterlogging of the expansion tank.

11Fill valve

12$IAPHRAGMTYPE OR BLADDERTYPE EXPANSIONN TANK if used (For closed-type expansion tank, pipe from top of air separator to tank fitting as in &IGURE , page 17.)

13!IRISEPARATORPANDRAUTOMATIC VENT NIF USEDI.OTEUTHAT the fill valve must always be connected to the expan- sion tank, regardless of location of expansion tank, circulator or air separator.)

Part Number 550-101-009/0107

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Contents Gold CGa Other boiler components How it worksGold CGa Gas-Fired Water Boiler Contents Installer Please read before proceedingUser Installations must follow these codes 1a Prepare boiler location codes & checklistBefore locating the boiler, check the following Ss .ATIONAL %LECTRICAL%#ODEMinimum dimensions are v Length by Residential garage installations1b Prepare boiler location clearances Foundation1c Prepare boiler location vent system When removing boiler from an existing common vent systemChimney or vent require- ments Line chimney with corrosion-resistant metalProducts to avoid 1d Prepare boiler location air contamination1e Prepare boiler location air openings THEHBOILER #HECKETHEHBOILER PlacementecomparedAir openings must be provided To a,Motorized air dampers Exhaust fans and air moversSingle air opening option Exception for large spacesOrifice replacement procedure 2a Prepare boiler placement and setupPlace boiler/crate near position Inspect orifices and burnersHydrostatic pressure test 2b Prepare boiler pressure testDrain and remove fittings Prepare boiler for testPrepare boiler install vent piping Prepare boiler draft hood & spill switchDraft hood installation Spill switch installationInstallation 2e Prepare boiler vent damper installationDamper blade Minimum clearances3a Water piping general information 3b Water piping single-zone system Diaphragm-type or bladder- type expansion tank FigureClosed-type expansion tank Piping multiple zones 3c Water piping multiple zones3c Water piping multiple zones Temperature gauges 3d Piping low temperature systemsValve adjustment Figures 13 and 14 only Primary/secondary preferred Bypass piping methodLendetemperaturemgauge Oiler Isolation BALANCING ValvesONE 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 Connect gas supply piping to boiler Gas pipingNatural Gas Propane GasInstallation must comply with Field wiringWiring connections Ational %LECTRICAL #ODE !.3.&0! LATESTA EDI- tion6a Start-up preparation Freeze protection when usedCheck for gas leaks Determine if water treatment is needed Verify water chemistryInspect system water piping Fill the system with waterInspect base insulation  #LOSEOZONE Isolation VALVES6b Start-up operate boiler Efore STARTINGSTHEABOILER NDO the FOLLOWINGSs 6ERIFY the Boilerhand System are Full Oflwater Start the boiler 6c Start-up if boiler doesn’t startCheck system and boiler Check forCheck burner flames 6d Start-up verify operationCheck vent damper operation Check vent system operationOO Utton Onospilloswitch PUSHEDLIN Check-out procedure checklistOO !IRIPURGED FROMGSYSTEM  #ALCULATEUGASAINPUTMain 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 GAS mOWSSTO Pilot or Main GAS VALVE 9a Operation spark-ignited pilot boilers#ALL for HEATHthermostat circuit closes Damper is de-energized, and cycles to closed posi9a 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 10a Service and maintenance schedule Service technicianOwner maintenance 10b Service & maintenance annual start-up Boiler heating surfaces Oiled-bearing circulatorsRepair.URNERSNANDRBASE Cold fill and operating pressures Gas pipingAir vents and air elimination Limit controls and cutoffsFollowing installation, the valve Safety relief valves should beReview with owner Boiler relief valve11a Troubleshooting procedure Before troubleshooting #ONTINUITY CHECKER Event of vent damper failure Check the followingEffikal or Field Controls damper  ASAPRESSURESChart 1 Standing pilot Boiler will not fire 11b Troubleshooting standing pilot boilersControl indicator lights Lockout modes 11c Troubleshooting spark-pilot boilersControl indicator lights NON-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 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 RatingsJobosite CONDITIONS #URRENT ./3 Recommen Handling ceramic fiber and fiberglass materialsREATHING H&RESHGAIR 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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