Service Manual

1Service

D: Functions

Reset last 10 errors

The reset last 10 errors parameter allows the error counter to be reset to 0. This parameter can only be cleared by the installer by accessing parameter D1. Once accessed, press the RESET key to clear the counter.

Service mode delay

By pressing the pin button on the front of the display for five (5) seconds, the control will be placed in Service Mode. This will override all other heat demands. The Service Mode allows the installer to set the unit to either maximum firing rate or minimum firing rate for the purpose of combustion analysis. The delay sets the length of time the water heater will stay in the Service Mode if no keys have been pressed before going back to its original state. This parameter can only be changed by the installer by accessing parameter D2. The time range of this parameter is 0 to 40 minutes. The default value is 20 minutes.

E: WHR settings

Tank set point

When a DHW call for heat becomes active, the control will use the tank set point to determine the firing rate of the water heater based on the actual water temperature. This parameter can be changed by the installer by accessing parameter E3. The temperature range of this parameter is 50°F to 190°F. The default value is 180°F.

F:Not used

G:Not used

H: Control modes

Control source

The control source parameter selects the method used to control the modulation of the water heater. This parameter is adjustable by the installer by accessing parameter H2. The control methods are as follows:

1 - Thermostat. The control modulates the water heater based on the user set point and the temperature of the tank sensor when a tank thermostat is used, or the inlet sensor.

2 - BMS (Building Management System). The control modulates the water heater based on the 0 - 10 VDC signal delivered to the appropriate terminals on the connection board. When BMS is selected additional parameters for BMS operation may need to be adjusted. These can only be accessed by the optional PC software. See the Armor Water Heater Smart System PC Program Instructions Manual for additional BMS parameter information.

3 - Cascade. The water heater is part of a group of water heaters sequenced together. The designated Leader water heater determines the total output needed from the group based on the set point and controlling sensor reading. It assigns portions of this output to itself (Leader) and the Member water heaters. When Cascade is selected, each water heater in the group requires a unique address (see below). The default control is Thermostat.

Cascade address

The water heater designated as the Leader needs to be programmed with address 0. All the Member water heaters require addresses from 1 to 7, and the addresses must be different for each Member. The addresses can be in any order, regardless of the order in which the units are wired together. This parameter is adjustable by the installer by accessing parameter H3. The tank sensor must be connected to the Leader water heater. The default address is 1.

Max. cascade set point - Not used

Cascade offset - Not used

Cascade off-on differential - Not used

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Lochinvar 150 - 500 service manual Functions, WHR settings, Not used Control modes
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150 - 500 specifications

Lochinvar has established itself as a leader in the field of hydronic heating solutions, and the Lochinvar 150 - 500 series is a prime example of its commitment to innovation and efficiency. Designed primarily for commercial applications, this line of high-efficiency boilers is engineered to provide optimized performance, reliability, and cost-effectiveness.

One of the standout features of the Lochinvar 150 - 500 series is its robust construction. Built with a durable stainless-steel heat exchanger, these boilers offer superior resistance to corrosion, ensuring a longer lifespan and consistent performance over time. The advanced design of the heat exchanger also maximizes heat transfer, contributing to higher efficiency ratings.

In terms of technology, the Lochinvar 150 - 500 series incorporates the Concentric Venting System, which allows for flexible installation options and reduces the overall footprint required for the boiler setup. This system is particularly advantageous in commercial settings where space can be limited. The boilers are equipped with smart controls that provide real-time monitoring and diagnostics, allowing for easier maintenance and reducing downtime.

The series features a comprehensive modulation range, allowing the boilers to adjust their output based on the heating demand. This capability not only enhances efficiency but also lowers energy consumption, making it an eco-friendly choice for businesses seeking to reduce their environmental impact. The Lochinvar 150 - 500 boilers utilize innovative combustion technologies, including an integrated burner that ensures optimal combustion efficiency and reduced emissions.

Safety is a priority with the Lochinvar 150 - 500 series, which includes multiple safety features such as lockout protection, pressure switches, and high-temperature limit controls. These measures ensure that the unit operates safely under varying conditions, providing peace of mind for operators.

Additionally, the compact design of the Lochinvar 150 - 500 series allows for easy transportation and installation. Its lightweight structure enables it to be maneuvered through tight spaces typically found in commercial buildings, making it a versatile option for installers.

In summary, the Lochinvar 150 - 500 series is an excellent choice for anyone seeking a reliable, efficient, and technologically advanced boiler solution. With its durable construction, advanced features, and commitment to safety and efficiency, this series stands out as a trusted option in the competitive market of hydronic heating systems.
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