2 Prepare water heater

Model 400

1.Remove the top and front access covers from the unit (no tools required for removal).

2.Remove the three screws securing the venturi to the blower.

Note: When separating the venturi from the blower, take care not to damage the O-ring inside the blower (FIG. 2-3).

3.Remove the four screws securing the gas valve to the venturi (FIG. 2-3).

4.Locate the propane orifice disk from the conversion kit bag. Verify that the stamping on the orifice disk matches the water heater size (see Table 2A on page 13).

5.Remove the existing orifice from the O-ring in the side of the gas valve and replace it with the orifice from the kit. Position and secure the orifice in the valve as shown in FIG. 2-3.

6.Reposition the gas valve against the venturi and replace the screws (FIG. 2-3) securing the valve to the venturi.

7.Inspect the O-ring inside the blower. Handle the O-ring with care, do not damage. Reposition the venturi against the blower and replace the screws securing the venturi to the blower (FIG. 2-3).

8.After installation is complete, attach the propane conversion label (in the conversion kit bag) next to the water heater rating plate. Attach the LP caution label (in the conversion kit bag) to the left side of the unit in the lower left corner.

9.Replace the top and front access covers.

￿WARNING After converting to LP, check combustion per the Start-up procedure in Section 10

of this manual. Failure to check and verify combustion could result in severe personal injury, death, or substantial property damage.

￿DANGER Armor 400: Inspect the O-ring when the blower is disassembled. The O-ring

must be in good condition and must be installed. Failure to comply will cause a gas leak, resulting in severe personal injury or death.

Figure 2-3Installing Propane Orifice - Model 400

Installation & Operation Manual

Model 501

1.Remove the top access cover from the unit (no tools required for removal).

2.Turn the adjustment screw on the gas valve clockwise until it stops. Then turn the adjustment screw counterclockwise four and three quarter (4 3/4) turns (see FIG. 2-4).

3.Use a combustion analyzer to verify CO2 is within the range of 9.6 – 10.5%. If not, adjust the screw

counterclockwise incrementally to raise CO2 and clockwise to lower CO2 (FIG. 2-4).

4.After adjustment is complete, attach the propane conversion label (in the conversion kit bag) next to the water heater rating plate. Attach the LP caution label (in the conversion kit bag) to the left side of the unit in the lower left corner.

5.Replace the top access cover.

￿ WARNING

After converting to LP, check combustion

 

per the Start-up procedure in Section

 

10 of this manual. Failure to check and

 

verify combustion could result in severe

 

personal injury, death, or substantial

 

property damage.

Figure 2-4Gas Valve Adjustment - Model 501

14

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Lochinvar 151 operation manual 3Installing Propane Orifice Model
Page 13 Page 15

151 specifications

Lochinvar 151,286 is a notable model in the realm of commercial water heating solutions, designed primarily for large-scale applications. This model incorporates advanced technologies and features that set it apart in terms of efficiency, usability, and reliability.

One of the hallmark features of Lochinvar 151,286 is its high-efficiency system that leverages condensing technology. This technology enables the unit to extract additional heat from exhaust gases, allowing it to operate at an impressive annual fuel utilization efficiency (AFUE) rating. This not only reduces energy consumption, but it also significantly lowers operational costs.

The Lochinvar 151,286 is equipped with a robust stainless steel heat exchanger, which provides both durability and enhanced thermal efficiency. This design withstands the rigors of high-demand environments, making it ideal for restaurants, schools, hospitals, or any facility requiring consistent hot water supply. Its compact footprint allows it to be installed in tight spaces without sacrificing performance.

Another standout characteristic is its intelligent control system. The built-in touchscreen interface offers users an intuitive way to manage settings, monitor performance, and troubleshoot issues. This smart technology aids in simplifying maintenance and improves overall system reliability. The unit also features advanced safety protocols, including multiple sensors that monitor operation and provide alerts in case of irregular performance.

In terms of capacity, the Lochinvar 151,286 can deliver an impressive output, accommodating varying demands with ease. Its innovative modulation capabilities allow the unit to adjust its heating output based on real-time hot water needs, ensuring unmatched comfort and efficiency.

Supporting the model’s performance are versatile connectivity options. Lochinvar 151,286 can integrate seamlessly with building management systems, allowing facility managers to monitor and control heating processes remotely. This level of connectivity not only enhances control but also supports energy-saving strategies across the facility.

In conclusion, Lochinvar 151,286 stands out as a premium choice for commercial water heating needs. With its high-efficiency ratings, durable construction, intelligent control system, impressive capacity, and versatile connectivity, it ensures that hot water is delivered reliably and efficiently, meeting the demands of modern businesses while reducing energy costs. This combination of technology and design makes it an essential component for any large-scale facility focused on performance and sustainability.
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