Weil-McLain 550-110-260/0508 manual 11b Troubleshooting air pressure switch, Air pressure switch

Page 44

GOLD CGs Gas-Fired Water Boiler — Boiler Manual

11b Troubleshooting — air pressure switch

Air pressure switch

Make sure boiler water temperature is 100 °F or cooler before starting procedure to obtain appropriate readings.

Check pressure switch setting

1.See Figure 24 and Table 6.

2.Remove both air pressure switch hoses from air pressure switch.

3.Install tees and tubing as shown in Figure 24 to inclined manometer.

4.Turn off gas valve and set thermostat to call for heat. Inducer will run but burners will not ignite.

5.Check for 24 VAC between both air pressure switch terminals and ground.

6.If manometer reading is above the setpoint of the switch (see Table 6), but there is not 24 VAC between both air pressure switch terminals and ground

— replace air pressure switch.

Figure 24 Manometer connections

Table 6

Pressure switch setpoint

 

(for elevations above 2,000 ft, contact your

 

local Weil-McLain sales office for details.)

 

 

Boiler model number

Inches W.C.

 

CGs-3

1.79"

 

 

 

 

CGs-4

1.48"

 

CGs-5

1.22"

 

 

 

 

CGs-6

0.95"

 

 

 

Troubleshooting air pressure reading

1.If manometer reading is lower than the setpoint of the switch (see Table 6) — check for possible causes:

•blockage in hoses

•obstruction in inducer housing outlet

•loose inducer wheel on motor shaft

•inducer motor not in proper rpm

•inducer back plate not sealed properly

•blockage in block assembly

•blockage in flue pipe or termination

•incorrect pressure switch

Return to normal operation

When pressure reading is correct and air pressure switch is operating properly — remove tees and reinstall hoses to air pressure switch.

The boiler will not operate cor- rectly unless pressure switch hoses are correctly located. The red hose connects from the right side (negative) hose barb to the flue collector. The white hose connects from the left side (positive) hose barb of the switch to the connector box (between flue collector and inducer) as shown in

Figure 24.

44

Part number 550-110-260/0508

Page 43 Page 45
Image 44
Page 43 Page 45
Contents Gold CGs How it works Gold CGs Gas-Fired Induced-Draft Water Boiler Contents User InstallerPlease read before proceeding Before locating the boiler, check the following 1a Prepare boiler location codes & checklistInstallations must follow these codes 1b Prepare boiler location clearances When removing boiler from an existing common vent system 1c Prepare boiler location vent systemCGs special vent system Vent system1d Prepare boiler location contamination Products to avoid1e Prepare boiler location air openings Combustion air optionsSizing air openings Special considerationsSizing air openings for CGs installations 2a Prepare boiler placement & setup Orifice replacement procedurePlace boiler/crate near position Inspect orifices and burners2b Prepare boiler pressure test Hydrostatic pressure testDrain and remove fittings Prepare boiler for test3a Water piping general information 3b Water piping single-zone system 3c Water piping multiple zones Piping multiple zones3c Water piping multiple zones Temperature gauges Valve adjustment Figures 8 and 9 only3d Piping low temp systems Primary/secondary preferred bypass piping method3d Piping low temp systems Valve adjustment BOILER-bypass piping methodFigures 8 SYSTEM-bypass piping method Boiler 3e Water piping refrigeration systemsPrevent chilled water from entering Venting and combustion air Use direct vent sealed combustion if combustion airConnecting gas supply piping to boiler Gas pipingNatural Gas Propane GasField wiring Electrical installation must comply withWiring connections ThermostatFreeze protection when used 7a Start-up preparationCheck for gas leaks Verify water chemistry7b Start-up operate boiler Inspect system water piping Inspect base insulationFinal check before starting boiler Start the boiler7c Start-up if boiler doesn’t start Check burner flamesCheck for Pilot burner flame FigureCheck-out procedure checklist Installation and service certificate9a Operation sequence 9b Operation wiring diagrams Schematic wiring diagramLadder wiring diagram 9c Operating instructions CGs-3 to CGs-6 9c Operating instructions CGs-3 to CGs-6 9c Operating instructions CGs-3 to CGi-6 10a Service and maintenance schedule Verify Proper Operation After Servicing10b Service & maintenance annual start-up Oiled-bearing circulators Condensate drain system Burners, base and inlet air boxInducer motor 10b Service & maint. annual start-up Boiler relief valve Relief valve, typicalCleaning boiler heating surfaces Review with ownerCheck the following 11a Troubleshooting procedureBefore troubleshooting 11b Troubleshooting air pressure switch Air pressure switchCheck pressure switch setting Troubleshooting air pressure reading11c Troubleshooting control module Control indicator lights Lockout modesControl indicator lights NON-LOCKOUT modes Troubleshooting the control moduleControl module connections 11d Troubleshooting control module lights Chart 1 Troubleshooting Power light statusChart 2 Tstat Circ & Power lights flashing Chart 3 Press Switch & Power lights flashing Chart 4 Flame & Power lights flashing Item 8 , Does blower motor operate? Verify Sequence of operation, , 12a Replacement parts Section assembly Base Jacket Trim Controls12b Replacement parts section assembly Item number Description Weil-McLain part numberPage 12c Replacement parts base Description Weil-McLain Part number12d Replacement parts jacket Jacket assemblyBoiler Model Weil-McLain part number 12e Replacement parts trim Part number12f Replacement parts controls Propane gas components13a Dimensions Dimensional drawing13b Ratings DOEHandling ceramic fiber and fiberglass materials Removal of Combustion Chamber Lining or Base Panels

550-110-260/0508 specifications

Weil-McLain is a well-known name in the heating industry, offering a wide range of high-quality boilers and heating systems. Among its impressive lineup, the Weil-McLain 550-110-260/0508 model stands out for its performance, efficiency, and advanced technologies, making it suitable for residential and commercial heating applications.

The 550-110-260/0508 boiler is designed for flexibility and performance, providing an output capacity of 110,000 BTU per hour. This makes it suitable for various heating needs, from single family homes to larger commercial spaces. One of the key features of this model is its high-efficiency design, which allows it to operate at an AFUE (Annual Fuel Utilization Efficiency) rating of up to 95%. This means that a significant portion of the fuel consumed is converted into usable heat, resulting in lower energy bills and reduced environmental impact.

A standout characteristic of the Weil-McLain 550-110-260/0508 is its durable construction. Built with high-quality materials, this boiler is designed to withstand the rigors of daily use and provide reliable service over the years. Additionally, the unit features a compact design, allowing for easy installation in various configurations, whether it be in a basement, utility room, or outdoor setting.

Another impressive technology incorporated in this model is the advanced control system, which allows for precise temperature management and improved energy efficiency. The intuitive control interface enables homeowners and facility managers to easily set and adjust heating schedules, ensuring optimal comfort while minimizing energy consumption.

Safety is also a top priority for Weil-McLain. The 550-110-260/0508 is equipped with multiple safety features, including a pressure relief valve, limit controls, and a low water cutoff, which help to ensure safe and reliable operation.

In conclusion, the Weil-McLain 550-110-260/0508 model boasts a combination of efficient heating, durable construction, advanced control technology, and safety features, making it an excellent choice for those seeking a reliable and effective heating solution. Its versatility and performance make it well-suited for a variety of applications in both residential and commercial settings.
Top Page Image Contents