Weil-McLain 550-110-260/02002 manual 11b Troubleshooting air pressure switch

Page 42

GOLD CGs Gas-Fired Water Boiler

11b Troubleshooting — 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

Suction

Pressure

Inclined tube manometer

White

Flue collector

Red

White

Red

Rear

panel Red

White

Interior panel

Side panel

26035

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 correctly 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.

42

Part number 550-110-260/0200

Page 41 Page 43
Image 42
Page 41 Page 43
Contents Page How it works ① Control modulePage Contents Installer Please read before proceedingUser 1a Prepare boiler location codes & checklist Residential garage installation 1b Prepare boiler location clearancesFlooring and foundation 1c Prepare boiler location vent system Removing from existing vent1d Prepare boiler location contamination Air contamination1e Prepare boiler location air openings CGs combustion air optionsSizing air openings for CGs installations Place boiler/crate near position 2a Prepare boiler placement & setupOrifice replacement procedure Inspect orifices and burnersPrepare boiler for test 2b Prepare boiler pressure testPerform hydrostatic pressure test Fill and pressure test3a Water piping general information Diaphragm-type or bladder-type expansion tank Figure 3b Water piping single-zone systemExpansion tank Closed-type expansion tank Figure3c Water piping multiple zones Converted gravity or steam systemsTypical piping multiple-zone installations Temperature gauges Valve adjustment 3d Water piping low temp systemsPrimary/secondary preferred bypass piping For radiant heating or converted gravity systems3e Water piping low temp systems Boiler-bypass alternate piping 3f Water piping low temp systems 3f system-bypass alternate piping 3g Water piping refrigeration systemPrevent chilled water from entering boiler Connecting gas supply piping to boiler Venting and combustion airGas piping Natural Gas LengthThermostat Field wiringWiring connections Junction Box furnishedDetermine if water treatment is needed Freeze protection when used7a Start-up preparation Check for gas leaks7a Start-up preparation 7b Start-up operate boiler7c Start-up if boiler doesn’t start Check burner flamesCheck for Check-out procedure checklist Installation and service certificate9a Operation sequence Raise room thermostat to call for heat9b Operation wiring diagrams Schematic wiring diagramService For Your Safety Read Before Operating 9c Operation lighting instructions10a Service and maintenance schedule Service technician10b Service & maintenance annual start-up Condensate drain system Burners, base and inlet air boxBoiler heating surfaces Inducer motor10b Service & maint. annual start-up Boiler relief valve Lever must be operated AT LeastReview with owner 11a Troubleshooting procedure Before troubleshooting11b Troubleshooting air pressure switch Check pressure switch setting11c Troubleshooting control module Control indicator lights lockout modesControl 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 Turn OFF Power to boiler at service switch or breaker Does blower motor operate? Verify Sequence of operation, , 12a Replacement parts Page Page Page Page Page 13a Dimensions Dimensional drawing13b Ratings DOEHandling ceramic fiber and fiberglass materials Removal of Combustion Chamber Lining or Base Panels

550-110-260/02002 specifications

Weil-McLain is a well-known manufacturer of high-quality heating systems and boiler solutions, and the 550-110-260/02002 model is a testament to the company's commitment to innovation and performance. This particular boiler is designed for commercial and residential applications, providing exceptional heating efficiency and reliability.

One of the standout features of the Weil-McLain 550-110-260/02002 is its robust construction. Built using durable materials, this boiler is engineered to withstand demanding environments while maintaining optimal performance. The unit boasts a high thermal efficiency rating, which translates to lower energy costs and reduced environmental impact. The advanced design ensures that fuel consumption is minimized while delivering consistent heat output.

The Weil-McLain 550-110-260/02002 utilizes a multi-stage burner that enhances combustion efficiency. This feature not only reduces emissions but also improves overall energy use, making it an environmentally friendly choice. The sophisticated control system allows for precise modulation of the burner, ensuring that the boiler operates at peak efficiency under various load conditions.

The boiler is equipped with a user-friendly digital control interface, providing operators with real-time monitoring and diagnostics. This allows for easy adjustments and troubleshooting, which helps to reduce maintenance downtime. The integrated safety features enhance the operational reliability of the unit, ensuring safe operation in any environment.

Another important characteristic of the Weil-McLain 550-110-260/02002 is its adaptability. It can be configured to work with various types of fuel including natural gas and propane, giving users the flexibility to choose the most cost-effective energy source. This versatility also helps to extend the lifespan of the boiler as it can be easily adapted to changing energy needs.

In conclusion, the Weil-McLain 550-110-260/02002 is a high-performance boiler that combines durability, efficiency, and advanced technology. With its robust construction, efficient burner system, and user-friendly controls, it stands out as a reliable heating solution for both commercial and residential applications. The commitment to quality and innovation makes this model a preferred choice for those seeking dependable heating systems. Whether for new installations or replacements, the Weil-McLain 550-110-260/02002 delivers exceptional performance and value.
Top Page Image Contents