Installation & Operation Manual

Please read before proceeding

￿WARNING

NOTICE

Installer – Read all instructions, including this manual and the Knight Wall Mount Service Manual, before installing. Perform steps in the order given.

User – This manual is for use only by a qualified heating installer/ service technician. Refer to the User’s Information Manual for your reference.

Have this boiler serviced/inspected by a qualified service technician, at least annually.

Failure to comply with the above could result in severe personal injury, death or substantial property damage.

When calling or writing about the boiler

Please have the boiler model and serial number from the boiler rating plate.

Consider piping and installation when determining boiler location.

When servicing boiler –

To avoid electric shock, disconnect electrical supply before performing maintenance.

To avoid severe burns, allow boiler to cool before performing maintenance.

Boiler operation –

Do not block flow of combustion or ventilation air to the boiler.

Should overheating occur or gas supply fail to shut off, do not turn off or disconnect electrical supply to circulator. Instead, shut off the gas supply at a location external to the appliance.

Do not use this boiler if any part has been under water. The possible damage to a flooded appliance can be extensive and present numerous safety hazards. Any appliance that has been under water must be replaced.

￿WARNING

Any claims for damage or shortage in shipment must be filed immediately against the transportation company by the consignee.

Factory warranty (shipped with unit) does not apply to units improperly installed or improperly operated.

Failure to adhere to the guidelines on this page can result in severe personal injury, death, or substantial property damage.

Boiler water –

• Thoroughly flush the system (without boiler

connected) to remove sediment. The high-efficiency

heat exchanger can be damaged by build-up or

corrosion due to sediment.

• Continual fresh make-up water will reduce boiler life.

Mineral buildup in the heat exchanger reduces heat

transfer, overheats the stainless steel heat exchanger,

and causes failure. Addition of oxygen carried in by

makeup water can cause internal corrosion in system

components. Leaks in boiler or piping must be repaired

￿WARNING

If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

This appliance MUST NOT be installed in any location where gasoline or flammable vapors are likely to be present.

at once to prevent makeup water.

￿ CAUTION Do not use petroleum-based cleaning or sealing compounds in the boiler system.

Gaskets and seals in the system may be damaged. This can result in substantial property damage.

WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance.

Do not touch any electric switch; do not use any phone in your building.

Immediately call your gas supplier from a near by phone. Follow the gas supplier’s instructions.

If you cannot reach your gas supplier, call the fire department.

Installation and service must be performed by a qualified installer, service agency, or the gas supplier.

Do not use “homemade cures” or “boiler ￿ CAUTION patent medicines”. Serious damage to

the boiler, personnel, and/or property may result.

Freeze protection fluids –

NEVER use automotive antifreeze. Use only inhibited propylene glycol solutions, which are specifically formulated for hydronic systems. Ethylene glycol is toxic and can attack gaskets and seals used in hydronic systems.

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Lochinvar WH 55-399 operation manual Please read before proceeding, When servicing boiler, Boiler operation, Boiler water

WH 55-399 specifications

The Lochinvar WH 55-399 is a high-efficiency water heater designed for residential and commercial applications, offering a reliable solution for hot water needs. This model represents an advanced approach to water heating, combining cutting-edge technologies and features that ensure optimal performance and energy efficiency.

One of the standout features of the Lochinvar WH 55-399 is its high thermal efficiency, which is a key factor in reducing energy consumption and operating costs. With an efficiency rating exceeding 90%, this water heater ensures that more energy is converted into usable hot water, making it an environmentally friendly choice.

The WH 55-399 utilizes advanced condensing technology, which allows it to extract additional heat from the exhaust gases before they are expelled. This process not only increases efficiency but also significantly decreases greenhouse gas emissions. The unit is also equipped with an intelligent control system that allows for precise temperature adjustments, ensuring that the user has an optimal supply of hot water while maintaining energy savings.

Another important aspect of this model is its impressive recovery rate. The ability to quickly heat water after a significant draw ensures that users will not experience interruptions in their hot water supply, making it ideal for busy households or commercial environments. This is particularly beneficial in applications requiring consistent hot water availability, such as restaurants or athletic facilities.

The Lochinvar WH 55-399 is designed with durability in mind. Constructed from high-quality materials, this water heater boasts a robust tank lined with corrosion-resistant coatings, extending the lifespan of the unit and reducing maintenance needs. Additionally, it features a reliable gas burner and a well-insulated tank, contributing to its overall efficiency and performance.

Safety is also a priority with the WH 55-399. The unit incorporates multiple safety features, including a flame sensor, automatic shut-off valve, and over-temperature protection, ensuring peace of mind for users.

In summary, the Lochinvar WH 55-399 stands out with its combination of high efficiency, advanced technology, and durable construction. Whether for residential or commercial use, this water heater provides a dependable and cost-effective solution for all hot water needs. Its innovative design and performance characteristics make it a top choice for anyone seeking a premium water heating option.