Check air vents

2 Maintenance schedule

1.Reference FIG. 2-3 below.

2.Visually inspect vent to make sure that no leaks are present.

3.If there is leaking, tighten the pin valve.

4.If the leaking continues, replace the air vent.

Figure 2-3 Air Vent

MANUAL

User’s Information Manual

WARNING Have leaks fixed at once by a qualified service technician. Failure to comply could

result in severe personal injury, death, or substantial property damage.

3.Replace the front access door.

Operate relief valve

1.Before proceeding, verify that the relief valve outlet has been piped to a safe place of discharge, avoiding any possibility of scalding from hot water.

AIR VENT VALVE

Test low water cutoff (if installed)

WARNING

To avoid water damage or scalding due to valve operation, a metal discharge line must be connected to the relief valve outlet and run to a safe place of disposal. This discharge line must be installed by a qualified heating installer or service technician in accordance with the instructions in the Knight Wall Mount Installation and Operation Manual. The discharge line must be terminated so as to eliminate possibility of severe burns or property damage should the valve discharge.

1.If the system is equipped with a low water cutoff, test the low water cutoff periodically during the heating season, following the low water cutoff manufacturer’s instructions.

Reset button (low water cutoff)

1.Testing the low water cutoff shuts the unit off. Press the RESET button on the low water cutoff to turn the unit back on.

Check boiler piping (gas and water)

1.Remove the boiler front access door and perform a gas leak inspection per steps 1 through 7 of the Operating Instructions on page 9. If gas odor or leak is detected, immediately shut down the boiler following the procedures on page 9. Call a qualified service technician.

2.Visually inspect for leaks around water piping. Also inspect the circulators, relief valve, and fittings. Immediately call a qualified service technician to repair any leaks.

2.Read the boiler pressure/temperature gauge to make sure the system is pressurized. Lift the relief valve top lever slightly, allowing water to relieve through the valve and discharge piping.

3.If water flows freely, release the lever and allow the valve to seat. Watch the end of the relief valve discharge pipe to ensure that the valve does not weep after the line has had time to drain. If the valve weeps, lift the seat again to attempt to clean the valve seat. If the valve continues to weep afterwards, contact your qualified service technician to inspect the valve and system.

4.If water does not flow from the valve when you lift the lever completely, the valve or discharge line may be blocked. Immediately shut down the boiler, following the operating instructions on page 9 of this manual. Call your qualified service technician to inspect the boiler and system.

Shut boiler down (unless boiler is used for Domestic Water)

1.Follow “To Turn Off Gas to Appliance” on page 9 of this manual.

2.Do not drain the system unless exposure to freezing temperatures will occur.

3.Do not drain the system if it is filled with an antifreeze solution.

4.DO NOT shut down boilers used for domestic water heating, they must operate year-round.

51 - 211 specifications

Lochinvar 51-211 is a notable model in the realm of high-performance heating solutions, designed to efficiently meet commercial and residential hot water demands. This innovative water heater stands out due to its capacity, advanced technologies, and energy efficiency, making it a preferred choice for many.

One of the primary features of the Lochinvar 51-211 is its impressive output. With a 211,000 BTU input and a robust design, it is capable of delivering a substantial amount of hot water quickly, which is essential in applications where hot water demand fluctuates significantly. This unit is particularly suitable for large residential homes, restaurants, and other commercial settings where high-volume hot water is critical.

The Lochinvar 51-211 incorporates cutting-edge technology to optimize its performance. It features a stainless steel heat exchanger that not only enhances durability but also improves heat transfer efficiency. This construction provides not only longevity but also minimizes maintenance needs over the lifespan of the unit. Additionally, its smart control system allows for precise temperature control and monitoring, ensuring that users can easily customize settings according to their needs.

Energy efficiency is a cornerstone of the Lochinvar brand, and the 51-211 model is no exception. It achieves a high Energy Factor (EF), which translates to lower energy costs and reduced environmental impact. This unit is also designed to meet stringent efficiency standards, making it an ideal option for environmentally conscious consumers.

Another characteristic of the Lochinvar 51-211 is its versatility in installation. It can be installed in various configurations, allowing for flexible integration into existing systems. Furthermore, its compact design means it can fit into tight spaces without compromising functionality, making it perfect for urban settings where space is often a premium.

Safety features are also a priority in the design of the Lochinvar 51-211. The unit incorporates built-in safeguards, including flue gas monitoring and a vent system designed to prevent backdrafts, ensuring reliable and safe operation for users.

In summary, the Lochinvar 51-211 water heater combines high BTU output, advanced stainless steel technology, excellent energy efficiency, versatile installation options, and safety features. These attributes make it a top choice for anyone in need of a dependable and efficient hot water solution. With Lochinvar’s commitment to quality, users can feel confident that this unit will provide consistent performance for years to come.

Lochinvar 51 - 211 manual Check air vents

Models: 51 - 211