Weil-McLain CGA25SPDN manual Tstat Circ

Page 54

GOLD CGa Gas-Fired Water Boiler — Boiler Manual

11c Troubleshooting — spark-pilot boilers (continued)

CHART 2 — Spark-ignited pilot — Troubleshooting POWER light status

— Usually indicates reversed 120 VAC polarity if POWER light flashes by itself —

Electrical shock hazard — Wherever you see TURN OFF POWER , follow the instructions. Failure to follow instructions could result in severe personal injury, death or substantial property damage.

Is POWER light off?

No

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

Is POWER light...

 

 

 

 

 

 

Flashing

Flashing with

On steady

alone

another light

(not flashing)

 

 

 

 

 

 

 

 

 

 

 

 

 

TSTAT CIRC

Chart

 

 

 

light flashing

3

 

 

 

 

 

 

 

 

 

DAMPER

Chart

 

 

 

light flashing

4

 

 

 

 

 

 

 

 

 

 

 

 

FLAME

Chart

Chart

 

light flashing

5

6

 

 

 

 

 

 

For insufficient heat or no heat problem, go to Chart 7, page 59, if POWER light is on steady, with no other light flashing.

•Make sure service switch or circuit breaker is on or fuses are good.

•Remove 120 VAC IN plug (Figure 30, Item 3, page 53) on control module.

•Using voltmeter, check across top and bottom pins of 120 VAC IN plug.

Does voltmeter indicate 120 VAC?

No

Yes

Problem is with incoming electricity. Have licensed electrician repair circuit.

•Reconnect 120 VAC IN plug.

•Remove 120 VAC transformer PRIMARY plug (Figure 30, Item 2, page 53) on control module.

•Using voltmeter, check across top and bottom pins of PRIMARY receptacle.

Does voltmeter indicate 120 VAC?

No

Yes

•Usually indicates polarity on incoming 120 VAC power line is wrong.

•TURN OFF POWER at service switch or breaker, then reverse the HOT and NEUTRAL wires entering the boiler in the J-box.

•Restore POWER at service switch or breaker.

Is POWER light flashing now?

No

Yes

 

 

 

 

 

Have system checked by a

 

 

licensed electricain.

 

 

If problem persists, call your

Boiler should now

 

local Weil-McLain sales

operate normally.

 

representative.

 

 

 

Replace control module.

Retest.

•Reinstall 120 VAC transformer PRIMARY plug.

•Remove 24 VAC transformer plug (Figure 30, Item 5, page 53) on control module.

•Using voltmeter, check across pins of receptacle.

Does voltmeter indicate 120 VAC?

No

Yes

 

 

 

 

Replace transformer.

 

Replace control module.

Retest.

 

Retest.

 

 

 

54

Part Number 550-101-009/0107

Page 53 Page 55
Image 54
Page 53 Page 55
Contents Gold CGa How it works Other boiler componentsGold CGa Gas-Fired Water Boiler Contents Installer Please read before proceedingUser 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 3b Water piping single-zone system Diaphragm-type or bladder- type expansion tank FigureClosed-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 methodLendetemperaturemgauge Oiler Isolation BALANCING ValvesONE 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 VALVES6b Start-up operate boiler Efore STARTINGSTHEABOILER NDO the FOLLOWINGSs 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 10a Service and maintenance schedule Service technicianOwner maintenance 10b Service & maintenance annual start-up Boiler heating surfaces Oiled-bearing circulatorsRepair.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 valve11a Troubleshooting procedure Before troubleshooting #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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