UserísInformationManual

Common problems and solutions

Symptom

Common Causes

Possible Corrections

 

 

 

Rapid cycling —

Thermostat installed where drafts

Locate thermostat on inner wall away from heat sources or cool

boiler turns on and

or heat affect reading

drafts.

off frequently

 

 

Heat anticipator in thermostat

Adjust thermostat per manufacturer's instructions.

 

 

adjusted incorrectly

 

 

 

 

 

Incorrect limit setting

Set limit according to system needs. Maximum setting is 220˚F.

 

 

Increase limit setting to decrease cycling.

 

 

 

 

Insufficient water flow through

Check all valves to and from boiler. Return to proper setting.

 

boiler

 

 

Confirm circulator size.

 

 

 

 

 

Frequent release of

Expansion tank sized too small

Call qualified service technician to check expansion tank

water through relief

 

operation and size.

valve

 

 

Flooded expansion tank

Call qualified service technician to check expansion tank

 

 

 

operation.

 

 

 

 

Inoperative limit control

Call qualified service technician to replace limit control.

 

 

 

Need to frequently

Leaks in boiler or piping

Have qualified service technician repair leaks at once to avoid

add makeup water

 

constant use of makeup water. Makeup water can cause

 

 

mineral deposits which, in turn, can cause boiler section failure.

 

 

Do not use petroleum-base stop-leak compounds.

 

 

 

Black water

Oxygen corrosion due to leaks in

Have qualified service technician repair at once. Keep pH of

condition

boiler and piping

water between 7.0 to 8.5.

Popping or

Mineral deposits in sections due

Call qualified service technician to de-lime boiler, if necessary.

percolating noise

to constant use of makeup water

In some cases, deposits will be too heavy to remove with de-

heard in boiler

 

liming procedures.

 

 

 

 

 

Have qualified service technician repair leaks to eliminate need

 

 

for constant makeup water.

 

 

 

 

Incorrect pH of boiler water

Call qualified service technician to check pH level and correct.

 

 

pH should be maintained between 7.0 to 8.5.

 

 

 

 

Insufficient water flow through

Check all valves to and from boiler. Return to proper setting.

 

boiler

 

 

Confirm circulator size.

 

 

 

 

 

Metal flakes found in

Contaminated combustion air

Remove any contaminating products. See page 3 in this

vent outlet or vent —

supply — See page 3 in this

manual.

flueway corrosion

manual.

 

Provide outside air for combustion. Kit available through Weil-

 

 

 

 

McLain distributor. Have qualified service technician pipe-up kit.

 

 

 

 

Condensation of combustion

Have qualified service technician inspect system piping and

 

gases in boiler sections

controls to verify proper regulation of return water temperature.

 

 

 

Some radiators or

Air in system

Bleed air from system through air vents in radiators or

baseboard units do

 

baseboard units.

not heat or are noisy

 

 

Low system pressure

Fill to correct pressure.

 

 

 

 

 

 

Check for leaks in boiler or piping. Have qualified service

 

 

technician repair at once.

 

 

 

 

High limit set too low

Adjust high limit to higher setting.

 

 

 

Part Number 550-110-592/1000

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Weil-McLain EGH, PFG, PEG, CGs, CGi, LGB manual Common problems and solutions, Symptom Common Causes Possible Corrections
Page 22 Page 24

CGi, PFG, PEG, LGB, CGs specifications

Weil-McLain is a highly regarded manufacturer of boilers and hydronic heating systems, well-known for its innovative approach and commitment to quality. Among its extensive product lineup, the PEG, LGB, CGs, PFG, and CGi series stands out due to their advanced engineering, efficiency, and reliability. Each series caters to varying residential and commercial heating needs, making them versatile options for consumers.

The PEG series is recognized for its impressive efficiency ratings and robust construction. It utilizes a cast iron heat exchanger, which not only enhances heat retention but also ensures longevity. Its low water content and advanced control features allow for quick heating response times, making it ideal for homes requiring reliable heat. The PEG series is available in a range of sizes, ensuring a fit for any application.

The LGB series is tailored for light commercial applications, combining efficiency with remarkable performance. Built with Weil-McLain’s signature high-grade cast iron, the LGB models are designed for durability and ease of maintenance. They offer an impressive thermal efficiency and feature a compact design, making them suitable for installations where space is a concern. Advanced options such as multiple venting configurations contribute to their versatility, adapting to various building designs.

The CGs series is specifically designed for commercial applications and emphasizes efficiency through advanced technology, including an intelligent control system that optimizes operation based on demand. Its low NOx design helps meet stringent environmental standards, while its robust build ensures high performance under heavy load conditions. The CGs is often sought after for larger facilities requiring consistent and efficient heating.

Weil-McLain’s PFG series takes efficiency to the next level with its highly efficient gas-fired design. It features a light-weight configuration and quick-connect venting options, which simplify installation. This series is known for its low emissions and high energy efficiency, making it an eco-friendly choice for today’s environmentally conscious consumers.

Lastly, the CGi series is a standout for residential applications, offering flexibility and ease of use. The series features a cast iron heat exchanger and is compatible with various control systems, providing an adaptable and efficient solution for home heating.

Overall, Weil-McLain’s PEG, LGB, CGs, PFG, and CGi series exemplify the company’s dedication to quality, energy efficiency, and customer satisfaction, providing reliable heating solutions for diverse applications.
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