Weil-McLain CGA25SPDN manual Exhaust fans and air movers, Motorized air dampers

Page 11

GOLD CGa Gas-Fired Water Boiler — Boiler Manual

FREE AREA of openings — the minimum areas given in this manual are free area (equals the area, length times width of opening, after deduction for louver obstruction).

Use the free area information provided by the louver manufacturer. When this information is not available, assume:

ss7OOD LOUVERSV ˆASSUME FREE AREA IS OF TOTAL SO THEHACTUALLAREA of each opening with wood louvers would be 5 times the required free area.

ss-ETALTLOUVERSV ˆASSUME FREE AREA IS OF ACTUAL AREAESO OFOR WOOD louvers, the actual area of each opening must be 1.67 times the required free area.

Single air opening option 7

A single combustion air opening can be used in lieu of the two-opening options on page 10, provided:

Clearances from boiler to walls

ss4HEHBOILER MUST HAVE CLEARANCES OF AT LEASTATHOSEOSHOWNOIN &IGURE A page 7.

Opening must be directly to outside

ss4HEHOPENINGNMUST CONNECTNDIRECTLY TO THEHOUTDOORS OR TO AASPACE THAT communicates directly to the outdoors (not to an interior space).

s4HEHAIRICANABE PROVIDED THROUGHOAADIRECT OPENINGNOR THROUGHOA HORIZONTAL or vertical duct.

Opening placement

ss 4HEHTOP OF THE AIR OPENING MUSTABE WITHINP INCHESGOF THE CEILING

Opening size

ss4HEHFREE AREA OF THEHOPENINGNMUST BE AT LEASTAEQUALUTO THEHSUMMOF THEH area of all equipment vent connectors in the space, and . . .

ss4HEHFREE AREA OF THEHOPENINGNMUST BE AT LEASTASQUARE INCH PER  

"TUHR INPUT RATINGPOF ALL EQUIPMENT LOCATED INATHELSPACE

Exception for large spaces 7

.O COMBUSTION AIRIOPENINGS ARERNEEDED WHEN THEHBOILER AND OTHERRAP-

pliances) are installed in a space with a volume AT LEASTA CUBICBFEETEPERE  "TUH of all installed appliances, provided:

ssTHEHBUILDINGDMUSTSNOTOHAVE UNUSUALLYYTIGHTGCONSTRUCTION (see defini- tion, this page)

ssALLLCLEARANCES AROUND THEHBOILER MUST MUST BE NO LESS THAN SHOWNWIN

Figure 1a, page 7.

To determine if the space is large enough to qualify:

ss !DDDTHE TOTALEINPUTOOF ALL APPLIANCESTIN -"(  S OF "TUH 

ss-ULTIPLY THIS NUMBER TIMESM TO DETERMINERMINIMUMIROOM VOLUME

ss %XAMPLE &OROAATOTALTINPUTPOF -"("  "TUH MINIMUMM volume is 50 x 100 = 5,000 cubic feet. At a ceiling height of 8 feet, the space must have at least 5,000 ÷ 8 = 625 square feet (25 feet x 25 feet, for instance).

Part Number 550-101-009/0107

Unusually tight construction

5NUSUALLYUTIGHTGCONSTRUCTION MEANSAPER !.3) :  buildings in which:

a.Walls and ceilings exposed to the outside atmo- sphere have a continuous water vapor retarder with a rating of 1 perm or less with openings gasketed, and . . .

b.Weather-stripping has been added on openable windows and doors, and . . .

C #AULKING OR SEALANTS ARERAPPLIEDLTO AREASESUCH AS joints around windows and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas lines, and in other openings.

For such construction cases, if appliances use inside air for combustion, PROVIDE AIRIOPENINGS INTO THEHBUILDING FROM OUTSIDE. Size and locate these openings per the appropriate case in &IGURE   OR  on page 10.

Exhaust fans and air movers

The appliance space must never be under a negative pressure, even if the appliance(s) are installed as direct vent. Always provide air openings sized not only to the dimensions required for the firing rate of all appli- ances, but also to handle the air movement rate of the exhaust fans or air movers using air from the building or space.

Motorized air dampers

If the air openings are fitted with motorized dampers, electrically interlock the damper to:

ss0REVENTVTHEHBOILER FROM lRINGIIF THEHDAMPER IS NOTO fully open.

ss3HUT THEHBOILER DOWN SHOULD THEHDAMPER CLOSEODUR- ing boiler operation.

To accomplish this interlock, wire an ISOLATED CONTACT (proving the damper open) in series with the thermo- stat input to the boiler. The boiler will not start if this contact is open, and will shut down should it open during operation.

11

Page 10 Page 12
Image 11
Page 10 Page 12
Contents Gold CGa Other boiler components How it worksGold CGa Gas-Fired Water Boiler Contents User InstallerPlease read before proceeding 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 Closed-type expansion tank 3b Water piping single-zone systemDiaphragm-type or bladder- type expansion tank Figure 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 onlyONE Valve $RAINAVALVE LendetemperaturemgaugeOiler Isolation BALANCING Valves 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 insulationSs 6ERIFY the Boilerhand System are Full Oflwater 6b Start-up operate boilerEfore STARTINGSTHEABOILER NDO the FOLLOWING 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 Owner maintenance 10a Service and maintenance scheduleService technician 10b Service & maintenance annual start-up Repair.URNERSNANDRBASE Boiler heating surfacesOiled-bearing circulators 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 owner #ONTINUITY CHECKER 11a Troubleshooting procedureBefore troubleshooting  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.
Top Page Image Contents