Installation & Operation Manual

8 Field wiring

￿WARNING ELECTRICAL SHOCK HAZARD – For your safety, turn off electrical power supply

before making any electrical connections to avoid possible electric shock hazard. Failure to do so can cause severe personal injury or death.

4.

Wire the boiler pump as shown in FIG. 8-2.

5.

When connecting a domestic hot water (DHW) pump,

 

connect the wiring to the line voltage terminal strip as

 

shown in FIG. 8-2.

6.

To activate a system pump, wire as shown in FIG. 8-2. If

NOTICE

￿CAUTION

Wiring must be N.E.C. Class 1.

If original wiring as supplied with boiler must be replaced, use only type 105°C wire or equivalent.

Boiler must be electrically grounded as required by National Electrical Code ANSI/NFPA 70 – latest edition.

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation.

the motor is larger than 1/8 hp or 1.8 amps, you must isolate

with a relay.

Figure 8-2Line Voltage Field Wiring Connections

Figure 8-1Remove Bezel

REMOVE BEZEL

Installation must comply with:

Low voltage connections

1.Route all low voltage wires through the knockouts in the bottom front right side, just under the control panel, as shown in FIG. 8-3.

2.Connect low voltage wiring to low voltage connection board as shown in FIG. 8-4 on page 55 of this manual and the boiler wiring diagram.

Figure 8-3Routing Field Wiring

1.National Electrical Code and any other national, state, provincial, or local codes, or regulations.

2.In Canada, CSA C22.1 Canadian Electrical Code Part 1, and any local codes.

Line voltage connections

1.Remove bezel as shown in FIG. 8-1.

2.Connect 120 vac power wiring to the line voltage terminal strip in the junction box, as shown in FIG. 8-2.

3.Provide and install a fused disconnect or service switch (15 amp recommended) as required by the code (see FIG. 8-2).

52

LOW VOLTAGE CONNECTION BOARD

LOW VOLTAGE KNOCKOUTS

LINE VOLTAGE

JUNCTION BOX

LINE VOLTAGE

KNOCKOUTS

IMG00164

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Lochinvar WH 55-399 Field wiring, Installation must comply with Low voltage connections, Line voltage connections
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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.
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