Weil-McLain 550-141-951/1002 manual Install propane gas orifice, Perform Boiler Manual start-up

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GAS-FIRED WATER BOILER — Propane Conversion Instructions

You must read and have the Ultra Boiler Manual with you to

Figure 1 Gas component locations

proceed with these instructions.

 

Install propane gas orifice

1.Turn off electrical power to boiler at external line switch or breaker.

2.Remove jacket front door by removing two knurled head screws at lower front.

3.Lift door away from boiler to remove.

4.Shut off gas to boiler by closing the manual gas valve (Figure 1).

5.Remove propane orifice disc from conversion kit envelope. Read the stamping on the orifice.

The orifice stamping must agree with the boiler size (see front page). DO NOT proceed with installation if orifice is incorrect. Installing the wrong orifice could result in severe personal injury, death or substantial property damage.

6.Disconnect the gas line union (Figure 1).

7.Remove (3) star-drive screws securing gas valve to venturi (Figure 2).

8.Place orifice in the black rubber grommet in the gas valve outlet port (Figure 2).

9.Reposition gas valve against venturi and replace (3) screws securing valve to venturi.

10.Reconnect gas line union.

11.DO NOT ADJUST gas valve pressure. See WARNING, bottom right.

12. Perform leak test and gas pressure checks given on page 19 of Boiler Figure 2 manual. Verify gas pressure at gas valve inlet pressure tap is in the range

given on the front page of this document and in Boiler Manual.

Perform Boiler Manual start-up

Follow all instructions in Boiler Manual Section 7, pages 24 through 30, to start-up the boiler after converting for propane. Because the boiler has been changed, you must verify correct operation, including checking combustion with test instruments both at high fire and low fire as described in the Boiler Manual. Failure to comply could result in severe personal injury, death or substantial property damage.

Replace boiler jacket front door

Replace boiler jacket front door after servicing. The boiler front door must be securely fastened to the boiler to prevent boiler from drawing air from inside the boiler room. This is particularly important if the boiler is located in the same room as other appliances. Failure to keep the door securely fastened could result in severe personal injury or death.

Apply conversion label

1.After installation is complete, attach the propane conversion label (in instruction manual envelope) next to the boiler rating plate.

Installing propane orifice

DO NOT adjust or attempt to measure gas valve outlet pressure. The gas valve is factory-set for the correct outlet pressure. This setting is suitable for natural gas and propane, requiring no field adjustment. Attempting to alter or measure the gas valve outlet pressure could result in damage to the valve, causing potential severe personal injury, death or substantial property damage.

Part number 550-141-951/1002

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Contents Pipe sizing for propane gas STOP! Read this noticePropane gas operation requirements Propane supply pressure requirementsReplace boiler jacket front door Install propane gas orificePerform Boiler Manual start-up Apply conversion label

550-141-951/1002 specifications

The Weil-McLain 550-141-951/1002 is a highly regarded heating solution ideal for residential and commercial applications. Known for its efficient performance and robust design, this boiler is a reliable choice for those seeking effective temperature regulation and heating solutions.

One of the standout features of the Weil-McLain 550-141-951/1002 is its high-efficiency rating. The unit is designed to convert a significant amount of fuel energy into usable heat, minimizing waste and maximizing energy savings. This efficiency is further enhanced by advanced technologies that optimize the combustion process.

Built from high-quality materials, the Weil-McLain boiler boasts exceptional durability and longevity. Its corrosion-resistant heat exchanger enhances reliability while working under varying pressure levels. Moreover, its construction allows for excellent thermal conduction, ensuring rapid heating and reduced operational costs.

The 550-141-951/1002 features a user-friendly control panel, making it easy for homeowners and facility managers to adjust settings as needed. The integrated control system allows for precise temperature management, enabling users to achieve their desired comfort levels efficiently. In addition, this boiler is compatible with various heating systems, including hydronic and radiant heating applications.

Noise levels are often a concern with conventional boilers, but the Weil-McLain 550-141-951/1002 addresses this with its quiet operation. The design focuses on minimizing sound, creating a more pleasant environment for users.

Safety is paramount in the design of the Weil-McLain 550-141-951/1002. It comes equipped with multiple safety features, including pressure relief valves, automatic shut-off systems, and safety locks. These mechanisms work collectively to prevent accidents and ensure that the boiler operates within safe parameters.

Installation versatility is another strong point of the 550-141-951/1002. Its compact size allows it to fit into various spaces, making it suitable for both new constructions and retrofits in existing buildings.

In summary, the Weil-McLain 550-141-951/1002 stands out in the heating market due to its high efficiency, durability, user-friendly controls, quiet operation, and stringent safety features. This makes it a top choice for those looking for a dependable and effective heating solution, ensuring a warm, comfortable environment throughout the cold months.
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