GOLD CGi Gas-Fired Water Boiler — Boiler Manual

11c Troubleshooting — control module lights (cont.)

CHART 2 — TSTAT CIRC & POWER lights flashing

— Usually indicates 48 VAC on thermostat circuit (stray voltage) —

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.

•Disconnect the two external wires connected to the boiler thermostat leads (two black low voltage leads in J-box).

•Connect a voltmeter across these two incoming wires. Close each thermostat, zone valve and relay in the external circuit one at a time and check the voltmeter reading across the wires.

•There should NEVER be a voltage reading.

•If a voltage does occur under any condition, check and correct the external wiring. (This is a common problem when using 3-wire zone valves.)

•Once the external thermostat circuit wiring is checked and corrected if necessary, reconnect the external thermostat circuit wires to the boiler thermostat wires and allow the boiler to cycle.

Did you find a voltage across the two external thermostat circuit wires?

Yes

No

•Leave external boiler thermostat connection wires disconnected from boiler.

•Troubleshoot the external thermostat circuit until you find the source of the stray voltage. (Pay close attention to the wiring connections to 3-wire zone valves.)

•Correct the problem and repeat the voltmeter test above, verifying there is no longer a voltage reading under any condition in the external thermostat circuit.

•An isolating relay may be required.

•If no voltage is found under any condition of the external thermostat circuit, connect the two boiler thermostat connection leads together (or jumper the boiler aquastat T-T terminals).

• Turn off power to the boiler for 1 minute.

• Turn on power and allow boiler to cycle.

Do the TSTAT and POWER lights still flash?

No

 

Yes

 

 

 

 

•Boiler should now operate per the normal sequence of operation shown in Figure 30, page 37.

•Replace control module.

•Retest.

52

Part Number 550-110-710/0107

 

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Weil-McLain Series 2 manual Chart 2 Tstat Circ & Power lights flashing
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Series 2 specifications

The Weil-McLain Series 2 is a highly regarded boiler system known for its robustness, efficiency, and ease of installation. Designed primarily for residential and light commercial applications, the Series 2 boasts a variety of features that cater to diverse heating needs.

One of the standout characteristics of the Series 2 is its cast iron construction, which provides durability and longevity. Cast iron is well-suited for heat retention, allowing the boiler to operate more efficiently and deliver consistent warmth. The Series 2 is available in multi-fuel options, accommodating both natural gas and propane, making it versatile for various installations.

Efficiency is a key feature of the Weil-McLain Series 2, with annual fuel utilization efficiency (AFUE) ratings that meet or exceed industry standards. This ensures that homeowners can enjoy not only a comfortable living environment but also reduced energy bills. The Series 2 is designed to provide optimal performance, minimizing fuel consumption while maximizing heat output.

Another innovative aspect of the Series 2 is its user-friendly control system. Equipped with advanced controls, the boiler allows for precise temperature management and can easily be integrated with existing heating systems. This adaptability is crucial for ensuring that the boiler matches the specific heating demands of any space, increasing overall comfort levels.

Installation is straightforward, thanks to the boiler's thoughtful design. The Series 2 features a compact footprint, allowing for flexible placement in various settings. Additionally, Weil-McLain provides comprehensive documentation and customer support, making it easier for technicians to install and maintain the system.

The Series 2 also includes features aimed at ease of maintenance. Its clean-out ports facilitate quick access for servicing, ensuring that the boiler remains in peak operating condition throughout its lifespan. Weil-McLain’s commitment to quality means users can expect reliable performance year after year.

Overall, the Weil-McLain Series 2 stands out as an excellent choice for those seeking a dependable, efficient, and straightforward heating solution. Its combination of durable construction, high efficiency, and user-centric design makes it a leading option in the boiler market, appealing to both homeowners and professionals alike. Whether for a new installation or a replacement, the Series 2 is poised to deliver exceptional heating performance.
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