10 Operating information

General

How the boiler operates

The SYNC uses advanced stainless steel heat exchangers and electronic control modules that allow fully condensing operation. The blowers pull in air and push flue products out of the boiler through the heat exchangers and flue piping. The control modules regulate blower speed to control the boiler firing rate. The gas valve senses the amount of air flowing into the boiler and allows only the right amount of gas to flow.

How the control modules operate

The SYNC boiler is equipped with two (2) SMART TOUCH control modules. The control modules work in synchronization to meet the heat demand of the system.

The SMART TOUCH control modules receive input from boiler sensors and external inputs. The control modules activate and control the blowers and gas valves to regulate heat input and switches the boiler, Hot Water Generator (HW), and system pumps on and off as needed. The user programs the control modules to meet system needs by adjusting control parameters. These parameters set operating temperatures and boiler operating modes. Boiler operation is based on system temperature.

Control inputs and outputs

Room thermostat / zone control

This input tells the boiler to provide water for space heating.

Hot Water Generator (HW) tank thermostat

This input tells the boiler to provide water for heating an indirect HW tank.

Installation & Operation Manual

HW priority

The SMART TOUCH control module allows connection of a HW thermostat to the low voltage connection board. When the HW thermostat calls for heat, the control modules activate the HW pumps, shuts down the boiler pumps, and immediately sets the target outlet water temperature to 180°F (82.2°C). This provides automatic priority heat allocation to the HW Generator for maximum response and recovery. The HW pumps continue for 30 seconds after the heating cycle to deliver the most possible heat.

Controlling sensor

The control module is programmed to use the outlet sensor as the control sensor by default. If a system supply sensor is connected, the control automatically uses it as the control sensor.

Anti-cycling

After a space heating demand has been satisfied, the control will delay the next space heating call for a set time period (time is adjustable by the installer). The time delay will be bypassed if the inlet water temperature drops too far during the delay.

Boiler, system, and HW pump control

When a space heating call for heat starts and no HW call is on, the system and boiler pumps are turned on. As long as the space heating call for heat is on, the system pump will remain on. If a HW call for heat is on, the boiler pumps will wait to turn on until just before the HW pumps turn off. After the space heating call for heat ends, both pumps will run for an additional period of time.

When a HW call for heat starts, the HW pumps are turned on. If a space heating call for heat was on, the boiler pumps will turn off a few seconds after the HW pumps turn on.

0 - 10V input (set point or power)

The SYNC 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.

Louver

A dry contact is provided to open and close louvers whenever the SYNC boiler requires combustion air from inside the room. Connect the Louver End Switch to the Louver Proving Switch input on the Low Voltage Connection Board.

Temperature control

Modulation

The SYNC is capable of modulating its firing rate from a minimum of 10% to a maximum of 100%. The firing rate is dictated by the call for heat (i.e., space heating or hot water generation), the heating load, and various other temperature limitations.

49

Page 48 Page 50
Page 49
Image 49
Lochinvar 5 operation manual Operating information, General
Page 48 Page 50

5 specifications

Lochinvar 5 is a cutting-edge residential boiler designed to meet the heating needs of modern homes while ensuring high efficiency and user convenience. As one of the latest offerings from Lochinvar, a trusted name in the heating industry, the Lochinvar 5 combines advanced technology with robust features that make it a top choice for homeowners and contractors alike.

One of the standout characteristics of the Lochinvar 5 is its impressive energy efficiency. It boasts an AFUE (Annual Fuel Utilization Efficiency) rating of up to 95%, which significantly reduces fuel consumption compared to traditional heating systems. This not only translates to lower energy bills for homeowners but also minimizes the environmental impact, aligning with the growing demand for sustainable energy solutions.

The Lochinvar 5 employs a highly efficient modulating burner technology that optimizes fuel usage based on real-time heating demand. This ensures that the boiler operates at peak efficiency, providing consistent warmth without unnecessary energy waste. The inclusion of advanced controls further enhances its performance, allowing users to adjust settings easily and monitor usage through a user-friendly digital display.

Durability and reliability are also paramount in the design of the Lochinvar 5. Constructed with high-quality materials, this boiler is built to withstand the rigors of daily use and provide long-lasting performance. Its compact design allows for flexible installation options, making it suitable for various residential settings, even where space is limited.

In addition to its impressive performance metrics, Lochinvar 5 is equipped with smart technology features that cater to the needs of modern consumers. Wi-Fi connectivity enables remote monitoring and control via a mobile app, giving homeowners the ability to adjust settings on the go. This feature not only enhances user convenience but also allows for proactive maintenance and alerts, helping to prevent potential issues before they arise.

Safety is a key consideration in the design of Lochinvar 5. It includes multiple safety features, such as a sealed combustion system that minimizes the risk of carbon monoxide leaks and an advanced monitoring system that ensures optimal operating conditions at all times.

In conclusion, the Lochinvar 5 stands out as an exceptional choice for those seeking a reliable, efficient, and smart residential heating solution. Its combination of advanced technologies, user-friendly features, and robust construction make it a leading option in the boiler market, ready to meet the demands of today’s homeowners. With an eye on energy efficiency and ease of use, Lochinvar 5 is well-equipped to provide comfortable, cost-effective heating for years to come.
Top Page Image Contents