11 Operating information

General

How the water heater operates

The Armor water heater uses an advanced stainless steel heat exchanger and electronic control module that allows fully condensing operation. The blower pulls in air and pushes flue products out of the water heater through the heat exchanger and flue piping. The control module regulates blower speed to control the water heater firing rate. The gas valve senses the amount of air flowing into the water heater and allows only the right amount of gas to flow.

Control inputs and outputs

Tank thermostat / tank sensor

Either of these inputs will tell the water heater to provide heat to the water tank. If a tank sensor is connected, the SMART SYSTEM control will ignore the tank thermostat.

0 - 10VDC input (set point or power)

The Armor water heater can be controlled by a Building Management System (BMS) using a 0 - 10 VDC signal. The control can be configured by the installer to use this signal to either control set point or firing rate. This signal can be sent to the heater through ModBus as well.

Temperature control

Modulation

The Armor water heater is capable of modulating its firing rate from a minimum of 20% to a maximum of 100%. The firing rate is dictated by the hot water draw and various other temperature limitations.

Night setback

The controller may be programmed to reduce the DHW set point during certain times each week. Seven different start and stop times may be programmed for the DHW setback.

Flame current support

To prevent nuisance shutdowns when the water heater is firing at minimum rates, the control will increase fan speed when the flame signal drops too low.

Installation & Operation Manual

Protection features

Outlet temperature, flue temperature, and temperature rise limiting

The outlet temperature is monitored by the water heater outlet temperature sensor. When the outlet temperature exceeds 185°F, the unit will reduce the fan speed. If the outlet water temperature exceeds 195°F the control will shut the unit down until it cools off.

The control module monitors the flue temperature by a sensor located in the flue exhaust. If the flue temperature exceeds 215°F the control will reduce the maximum fan speed. If the flue temperature exceeds 240°F the control will shut the unit down. The unit will restart automatically once the flue temperature drops 25°F and the minimum off time has expired.

The control monitors the temperature difference between the inlet and the outlet sensor. On Models 151 - 501 if this difference is between 25 - 30°F the control will reduce the fan speed. If the temperature difference exceeds 30°F the control will shut the unit down.

On Models 601 - 801 if the temperature difference is between 30 - 35°F the control will reduce the maximum fan speed. If the temperature difference exceeds 35°F the control will shut the unit down.

The unit will restart automatically once the temperature difference has dropped below 25°F (Models 151 - 501) or 30°F (Models 601 - 801) and the minimum off time has expired.

Freeze protection

DO NOT install the water heater in a room likely to freeze.

The following integral feature of the SMART SYSTEM control module provides some protection for the water heater.

The SMART SYSTEM control module provides freeze-up protection as follows when the water heater water temperature drops below 45°F:

Below 45°F, the water heater pump operates constantly.

Below 37°F, the water heater turns on.

The water heater and pump will turn off if water heater water temperature rises above 45°F.

￿ CAUTION This feature of the SMART SYSTEM control module does not eliminate the possibility

of freezing. The installation must still use recognized design, installation and maintenance practice to prevent freeze potential for the water heater.

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Lochinvar 151 operation manual Operating information, General

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.