Lochinvar 1.0- 1.3- 1.5 Unit Operation with Modbus Communications, Demand Configuration

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Modbus Instructions

5Unit Operation

Unit Operation with Modbus Communications

To control a SYNC boiler through a Building Management System communicating through Modbus, the SYNC Demand Configuration must be set to a value of 4, 5, or 6. These configurations allow different control points for a variety of applications. The configuration can be set by selecting Main>>Setup>>Service/Setup>>Demand Config.

Figure 5-1_Setup Screen

The SYNC boiler is equipped with a Modbus communication timer. This timer is programmable from 0 - 120 seconds. The timer can be programmed from the Modbus Setup Menu by selecting Main>>Setup>>BMS>>Modbus Timeout. The purpose of the timer is to ensure proper temperature data is communicated to the boiler in a timely manner. Additionally, it will provide for fail safe operation should Modbus communication be lost. This timer will cause the unit to revert back to internal unit controls should the Modbus communication be interrupted longer than the Modbus timer. The timer is reset every time a Modbus write command is received with updated temperatures or commands. It is the recommendation of Lochinvar that this timer be set to the shortest value possible.

When controlling a SYNC boiler through a Building Automation System (BAS), it is very important to ensure that the correct configuration bits are sent to holding register 40001, and that the correct data and enable signals are sent to holding registers 40002 - 40007, per the demand configuration.

Demand Configuration 4

In this configuration the unit is controlled by setting the setpoints locally on the boiler and providing an enable signal through Modbus communications.

All sensors and limiting devices should be hardwired to the terminal strip on the back of the unit excluding the thermostat enable and tank thermostat enable signal. These signals will be sent to the unit via Modbus.

The holding registers will need to be set as follows:

Holding Registers

Definition

Bit Value (HEX)

Action

 

 

 

 

40001

Configuration

00 01

Set Configuration to read 40002

 

 

 

 

40002

Coils

00 01

Enables unit (00 00 disables unit)

 

 

 

 

NOTE: To ensure proper operation re-send the configuration bits to holding register 40001 prior to issuing a command.

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Contents Modbus Communication Instructions Sync Models 1.0 1.3Contents Configuration AddressingModbus Board Diagnostics Timing SpecificationsData Transmission Mode ParityModbus Function Set DecModbus Exception Codes NameSync Boiler Memory Map Memory MapPrimary Data Tables Configuration Bits Holding RegistersWiring Requirements Physical WiringSecondary Secondary Smart Touch Control Module Primary Typical Boiler System Wiring 4Control LocationPhysical Configuration Cascade with individual Monitoring Unit Operation with Modbus Communications Demand ConfigurationUnit Operation Hot Water Generation DHW with direct controlMonitoring Only DHW with remote controlCascade Rate Rate and Temperature ConversionsTemperature Deg C Deg F VoltagesTroubleshooting Installation / Replacement Procedure Lockout Codes Input Registers 30016Diagrams LOW Voltage 120 VAC High Voltage2Ladder DiagramPart 3Wiring Diagram

1.0- 1.3- 1.5 specifications

Lochinvar has long been recognized as a leader in the water heating industry, offering high-efficiency solutions for residential and commercial applications. Among its celebrated products are the Lochinvar 1.0, 1.3, and 1.5 models, which represent a range of advanced technologies and features designed to meet diverse customer needs.

The Lochinvar 1.0 is crafted for residential applications, featuring a robust design that emphasizes energy efficiency and reliability. This model incorporates condensing technology, ensuring that water heating is optimized, resulting in reduced energy costs. With a thermal efficiency rating of up to 95%, the Lochinvar 1.0 significantly lowers fuel consumption while providing ample hot water for households. This model also includes a digital control system that offers precise temperature management, enhancing user convenience.

Moving up the scale, the Lochinvar 1.3 model is tailored for slightly larger residential needs and small commercial spaces. This model not only maintains high efficiency with a similar condensing technology but also boasts an expanded capacity. It is equipped with advanced features like an integrated tankless design, which ensures an uninterrupted supply of hot water without the need for a bulky storage tank. Moreover, the Lochinvar 1.3 offers advanced diagnostics, allowing homeowners and technicians to troubleshoot issues quickly and efficiently.

The Lochinvar 1.5 model ramps up the capability even further, catering to larger commercial applications or extensive residential requirements. It offers exceptional performance with an increased output and efficiency, ensuring that even in high-demand scenarios, users are not left wanting for hot water. With an impressive thermal efficiency rating exceeding 96%, this model is engineered to meet stringent energy regulations while providing reliable performance.

All three models feature durable components including stainless steel heat exchangers, enhancing longevity and resistance to corrosion. They also integrate user-friendly interfaces, making them accessible for easy adjustments and monitoring. Additionally, all Lochinvar models are designed with environmental responsibility in mind, contributing to reduced greenhouse gas emissions.

In summary, Lochinvar's 1.0, 1.3, and 1.5 models showcase a commitment to innovation in water heating technology. They offer a blend of efficiency, capacity, and user-friendly features suitable for various applications, making them a wise choice for those in search of reliable hot water solutions.
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