Installation & Service Manual

5Electrical connections

This appliance is wired for 120 VAC service. The appliance, when installed, must be electrically grounded in accordance with the requirements of the authority having jurisdiction or in the absence of such requirements, with the latest edition of the National Electrical Code ANSI/NFPA No. 70. When the unit is installed in Canada, it must conform to the CSA C22.1, Canadian Electrical Code, Part 1 and/or local Electrical Codes.

1.All wiring between the appliance and field installed devices shall be made with type T wire [63° F(35° C) rise].

2.Line voltage wire exterior to the appliance must be enclosed in approved conduit or approved metal clad cable.

3.The pump must run continuously when the appliance is being fired.

4.To avoid serious damage, DO NOT energize the appliance until the system is full of water. Serious damage may result.

5.Provide the unit with proper overload protection.

6.Install a wall thermostat on the inside wall. DO NOT install the thermostat in an area affected by drafts, sunlight, light fixtures, hot or cold water pipes or near a fireplace. See “Room Thermostat or Remote Thermostat Connection to Terminal Strip” (this page), for proper wiring connection.

Boiler Operating Temperature Control

The operating temperature control is located in the control panel, behind the control panel front access door. The sensing element for the operator is placed in a bulbwell installed in the heat exchanger. Carefully observe the inlet water temperature on the initial boiler on cycles. The exact temperature set point is based on your system’s requirements. Turn the control set point dial to the desired operating water temperature. Observe the boiler discharge temperature after each set point adjustment to ensure proper operation.

Room Thermostat or Remote Thermostat Connection to Terminal Strip

A room thermostat or remote temperature control may be connected to the boiler. The room thermostat should be installed on an inside wall, away from the influences of drafts, hot or cold water pipes, lighting fixtures, televisions, sun rays or fireplaces. Follow the manufacturers instructions supplied with the thermostat for proper installation and adjustment. The boiler is equipped with a terminal strip on the left side of the control panel to allow easy connection (FIG. 5-1).

Remove the jumper between the R and W terminals on the terminal strip. Refer to the chart in this section (Table 5A) to determine maximum allowable length and wire gauge recommended to connect the switching contacts of the room thermostat to the R and W terminals on the terminal strip. Connection to the terminal strip will allow the room thermostat to make and break the 24VAC boiler control circuit turning the boiler on and off based on the room ambient temperature requirements. Set the boiler operating temperature control as described in this section.

B

A

Figure 5-1_Terminal Strip Connections

TABLE - 5A

TERMINAL STRIP WIRING

 

Wire Gauge

Maximum

 

 

Allowable Length

 

 

 

 

 

 

 

 

 

12 GA

100 ft.

 

 

 

 

 

 

14 GA

75 ft.

 

 

 

 

 

 

16 GA

50 ft.

 

 

 

 

 

 

18 GA

30 ft.

 

 

 

 

 

Auxiliary Device Connection to Terminal Strip

A terminal connection strip is provided for ease of connection for Power Venting Systems, see FIG. 5-1, inset A.

A field supplied powered venter or powered louver/damper may be connected to the Solution boiler via a terminal strip located on the left side of the unit, see FIG. 5-1, inset B.

A 24 VAC relay can be powered from this location when a call for heat has been established. A device proving switch can be interlocked back to the appliance to ensure its operation before the appliance is allowed to fire.

Reference the wiring diagram on page 50 of this manual.

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Lochinvar 45,000 - 260,000 BTU/HR Electrical connections, Terminal Strip Wiring, Boiler Operating Temperature Control
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45,000 - 260,000 BTU/HR specifications

Lochinvar, a leader in high-efficiency heating solutions, presents the Lochinvar line of boilers, specifically the Lochinvar 45,000 - 260,000 BTU/HR models. These boilers are designed to meet a wide range of heating demands, making them ideal for residential and commercial applications alike.

One of the key features of the Lochinvar boilers is their impressive efficiency rating. Utilizing advanced condensing technology, these units can achieve efficiencies of up to 96% AFUE (Annual Fuel Utilization Efficiency). This high efficiency not only reduces fuel consumption but also lowers utility bills, making it a cost-effective solution for heating needs.

The Lochinvar boilers are equipped with a powerful heat exchanger constructed from durable stainless steel. This design not only maximizes heat transfer but also enhances the longevity of the unit. By preventing corrosion and minimizing maintenance requirements, the stainless steel heat exchanger ensures that the boiler operates at peak performance for years.

Another significant aspect of the Lochinvar boilers is their modulating burner system. This technology allows the boiler to adjust its output based on demand, ensuring that it only uses the energy necessary to maintain the desired temperature. This feature not only improves efficiency but also contributes to a more comfortable indoor environment by minimizing temperature fluctuations.

The Lochinvar series also showcases a user-friendly control interface. The advanced LCD display allows for easy monitoring and adjustment of system settings. Connectivity options are often included, providing the ability to integrate with modern building management systems for enhanced control and diagnostics.

Safety features abound in the Lochinvar models, which include built-in safeguards such as temperature and pressure relief valves, flame detection systems, and modulation cut-off to protect against overheating and other hazardous conditions.

Moreover, these boilers are designed for easy installation and maintenance. Compact dimensions and lightweight design facilitate straightforward setup, even in tight spaces. Additionally, users can take advantage of the unit’s self-diagnostic capabilities to simplify troubleshooting and reduce downtime.

In conclusion, the Lochinvar 45,000 - 260,000 BTU/HR boilers represent a pinnacle of innovation in heating technology. With high efficiency, advanced control systems, durable components, and safety features, they stand out as reliable and effective solutions for a variety of heating applications, ensuring comfort and efficiency in any environment.
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