GOLD CGs Gas-Fired Water Boiler — Boiler Manual

11d Troubleshooting — control module lights (cont.)

CHART 7 — Insufficient heat or no heat to system (POWER light on steady)

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.

• Has it been at least 5 minutes since setting thermostat to call for heat? If not, wait 5 minutes. Is system heating?

• Is thermostat set to call for heat? Remove thermostat wires at boiler and check continuity across the two wires. If circuit isn't closed, check external thermostat (zone valve, relay, etc.) wiring. Correct problems and retry.

• Reconnect external thermostat wiring at boiler.

Is thermostat circuit closed (continuity across wires)?

No

 

Yes

Is boiler System circulator operating?

No

Yes

•Remove CIRCULATOR harness plug from CIRCULATOR plug receptacle (Figure 25, Item 7, page 46). Check with voltmeter across pins of control module receptacle.

Does voltmeter show 120 VAC across pins?

No

Yes

Are all red lights off?

No

Yes

 

 

 

Wait 30 seconds. Are all red lights off?

No

Yes

 

 

 

Replace control module. Retest.

•Boiler is in standby.

•Set thermostat to call for heat and recheck

operation.

•Verify Sequence of operation, Figure 18, page 31.

•

Replace control

 

•

Repair/replace

 

module.

 

 

circulator. Retest.

•

Retest.

 

•

Repair/replace

 

 

 

 

wiring. Retest.

 

 

 

 

 

 

 

 

 

• Wait 5 minutes.

 

Is FLAME light on?

Yes

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

•If you have sufficient heat — boiler should be in normal operating sequence. (See normal sequence of operation, Figure 18, page 31.)

•If you have less than sufficient heat —

 

Is LIMIT light on?

No

Yes

Is vent or combustion air piping free of blockage?

No

 

Yes

 

 

 

 

 

 

 

 

 

 

• Correct conditions and

 

Contact your Weil-McLain

recheck operation.

 

sales representative.

•See Figure 18, page 31 for normal sequence of operation.

•Wait for boiler water to cool to temperature 20 to 30 °F

lower than temperature set on limit switch.

•Check limit switch contacts with continuity checker.

Are limit switch contacts

closed?

 

No

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

•Replace control module.

•Retest.

Check rollout switch continuity — is switch closed?

No

 

 

Yes

 

 

 

 

 

Are limit switch contacts closed?

 

No

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Boiler water temperature exceeded

 

 

 

 

setting on limit switch with thermostat

 

 

 

 

•

Replace

 

calling for heat. Boiler is OK. (See normal

 

sequence of operation, Figure 18, p. 31.)

 

limit switch.

 

 

 

• Also check setting on limit switch (should

•

Retest.

 

 

be above 140°F.).

 

 

 

 

• Replace rollout switch.

If rollout thermal fuse element has opened, determine cause and correct condition. Failure to do so will cause severe personal injury, death or substantial property damage.

•Check any other limit controls wired into the limit circuit. If all are OK, then replace control module.

•Retest.

Part number 550-110-260/0508

53

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Image 53
Weil-McLain 550-110-260/0508 manual Verify Sequence of operation
Page 52 Page 54

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.
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