Weil-McLain RL 28 - 38, F10 - F20 specifications Riello Models 40 Series F & RL

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Riello – Models 40 Series F & RL

Notes

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1Burner capacities listed for elevations up to 2,000 feet. For higher elevations, contact local Weil-McLain distributor/agent or sales office.

2Light oil based on No. 2 fuel oil with heating value of 140,000 Btu per gallon

3Boiler-burner unit to be adjusted to achieve +0.10 inches W.C. pressure at flue collar, resulting in positive pressure in firebox as listed.

4All settings and pressures shown are for initial start-up. Final values should be confirmed with combustion analysis.

5Light Oil Control Systems:

OO: On - Off operation. Single-position air damper.

LFS:

On-off operation, low fire start, high fire run. Two position air, two position oil.

LHL:

Low-high-low-off firing conditions – two position air & fuel controlled by separate motor, open

 

 

damper pre-purge.

MOD:

On-off operation with proven low fire start and full modulating firing conditions. Proportional motor

 

 

drives fuel metering valve and combustion air damper according to firing conditions, open damper pre-

 

 

purge.

6120/60/1 control circuit is used for all burners

7All 3 phase models require a separate 120/60/1 control voltage supply.

8Two stage units require a single SPDT controller for LHL firing rate operation.

9Models 780 through 1280 require a 120v bumping type signal or PID control type for modulation.

10Models 780 through 1280 include a motor relay or contactor

11Combustion Controls:

Riello model 530 SE/C electro-mechanical combination flame safeguard control/ignition transformer monitors the oil burner flame with cad-cell, provides interrupted ignition and pre-purge. Post purge relay option available upon request.

Siemens LAL 2.25 flame safeguard control monitors the oil burner flame with visual diagnostic window, provides pre- purge and post purge, provides switching necessary to allow firing rate motor to be driven to both low fire and high fire positions, prevent start up if pre-ignition interlocks are open and has low fire start proven circuit. In the event pre- ignition interlock circuit or running interlock circuit does not “prove”, system will lock out on safety. Infra red detector is standard.

12Other flame safeguards make and models available upon request on models 780 through 1280.

13Burners will be completely assembled and wired and factory tested fired.

14R Series Burners listed by Underwriters Laboratories, Inc. for the US and Canada, Fire Marshall Commonwealth of Massachusetts, City of New York MEA and others.

1540 Series F Burners listed by Underwriters Laboratories, Inc. for the US, Fire Marshall Commonwealth of Massachusetts, City of New York MEA, CSA and others.

16Special controls can be provided to meet other code requirements not listed. Consult local Weil-McLain distributor/agent or sales offices.

17All models will be provided with direct spark ignition. Electric gas pilot is not available.

1840 Series F burner motors run at 3250 RPM. R Series burner motors run at 3400 RPM.

19Combustion air damper position indicator reads 0-90° on RL28-38 and is found internally.

20On all modulating units air settings adjusted on cam profile.

Part Number 550-141-974/0404

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Contents Riello burner Riello Models 40 Series F & RL Burner Specification and Data Sheet Part Number 550-141-974/0404

F10 - F20, RL 28 - 38 specifications

The Weil-McLain RL Series, specifically the models RL 28 through RL 38 and the F10 to F20 variants, represents a significant advancement in commercial and industrial cast iron boiler design. Renowned for their efficiency, durability, and performance, these boilers are suitable for a wide array of heating applications, making them a preferred choice for many builders and heating professionals.

One of the key features of the Weil-McLain RL Series is its cast iron construction, which ensures longevity and resistance to wear and thermal shock. The sectional design allows for easy maintenance and versatile installation options. The units are available in various sizes, making it suitable for residential spaces as well as large commercial applications.

The RL 28 to RL 38 models come with an impressive thermal efficiency rating, achieving up to 84% when operating under optimal conditions. This efficiency can lead to significant energy savings over time, making them an eco-friendly choice amid rising energy costs. These models incorporate advanced heat transfer technology, allowing them to provide rapid heating while minimizing energy consumption.

Equipped with a two-pass design, the RL boilers extract maximum heat from the combustion gases, resulting in enhanced thermal efficiency. This feature not only improves performance but also reduces emissions, adhering to modern environmental standards.

The F10-F20 variants further enhance the versatility of the RL Series with their focus on hydronic heating systems. These models are designed to support a variety of piping configurations and can work seamlessly with both hot water and steam heating systems. This adaptability is crucial for historical renovations or modern installations that require specific heating solutions.

User-friendly controls are another hallmark of the RL Series, featuring integrated control systems that simplify operation and enhance safety. The controls are designed to provide precise temperature management, ensuring optimal comfort levels while maximizing energy efficiency.

Additionally, the Weil-McLain RL Series includes industry-standard components and accessories that facilitate ease of installation and serviceability. The combination of robust construction, advanced technology, and user-friendly features empowers building owners to achieve reliable heating performance year after year.

In summary, the Weil-McLain RL 28 to RL 38 and F10 to F20 models present an excellent choice for those seeking a durable, efficient, and versatile boiler solution. Their advanced design and operational flexibility make them suitable for various heating applications, making them a staple in the industry for both new installations and retrofitting existing systems.