48

AUX. DEVICE

 

 

 

 

 

 

RELAY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AUX. DEVICE

 

 

 

 

 

 

 

PROVING SWITCH

 

 

 

 

 

 

 

HIGH GAS

C

24VAC

AUX. DEVICE

 

 

 

 

PILOT SUPPLY

 

 

 

PRESSURE SWITCH

NO

GND

 

 

 

 

AUX. DEVICE

 

 

 

(500 ONLY)

NC

 

 

 

PROVING

 

 

 

 

 

 

GAS PRESSURE

 

 

 

LOW GAS

C

SWITCH

 

 

 

 

FLOW

 

 

 

 

PRESSURE SWITCH

NO

 

 

 

 

SWITCH

 

 

 

 

(500 ONLY)

NC

ALARM

 

 

 

 

 

 

CONTACTS

CN4

 

 

 

 

 

 

 

 

 

COM

RUNTIME

 

 

 

 

CONTACTS

 

 

 

 

FLOW SWITCH

NO

DHW THERMOSTAT

LOW WATER

 

 

 

 

 

 

 

 

R

ROOM THERMOSTAT /

CUTOFF

 

 

 

W

ZONE CONTROL

 

 

 

 

 

CN5

 

 

 

 

 

CN2

 

 

 

 

 

 

 

SYSTEM

 

 

 

 

TANK THERMOSTAT

 

SENSOR

 

 

 

 

 

DHW TANK

 

 

 

 

 

 

 

 

 

 

 

 

SENSOR

 

 

 

 

 

 

OUTDOOR

 

 

 

 

 

 

SENSOR

 

 

 

 

WALL THERMOSTAT /

 

SHIELD GROUND

 

 

 

 

A

SEQUENCING

 

 

 

ZONE CONTROL

 

B

 

 

 

 

 

 

 

 

 

 

 

SHIELD GROUND

CN3

 

 

 

 

 

 

 

 

 

0-10VDC

EXTERNAL

 

 

 

SYSTEM SUPPLY SENSOR

 

 

GND

CONTROL

 

 

 

 

CN1

 

 

 

 

 

(AUX) DHW SENSOR

 

 

 

 

 

 

 

OUTDOOR SENSOR

 

 

 

 

 

 

 

BUILDING

 

 

 

 

 

 

 

MANAGMENT

 

 

 

 

 

 

 

SYSTEM

 

 

 

LOW WATER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CUTOFF

 

 

 

 

SHIELD

 

SHIELD

 

 

FROM

 

 

TO

PREVIOUS A

A

NEXT

BOILER

B

B

BOILER

 

 

Figure 8-3Low Voltage Field Wiring Connections

8 Field wiring

Installation & Operation Manual

Page 48
Image 48
Lochinvar 399 operation manual 3Low Voltage Field Wiring Connections

399 specifications

Lochinvar 999 - 750, CF-CH(E)-i&s-08,399 is a cutting-edge boiler designed for commercial heating applications. With its robust construction and high efficiency, this model stands out in the crowded market of heating solutions.

One of the main features of the Lochinvar 999 - 750 is its exceptional thermal efficiency rating. The unit incorporates advanced condensing technology that allows it to recover heat from flue gases, which helps in achieving efficiency levels of up to 99%. This efficiency not only reduces energy consumption but also lowers operational costs, making it an excellent investment for businesses looking to minimize their carbon footprint.

The boiler is designed to provide a powerful output of 750 kW, ensuring it meets the heating demands of larger buildings or commercial spaces. Its capacity makes it suitable for a range of applications including schools, hospitals, and industrial facilities. Moreover, the unit features a built-in cascading system that enables multiple boilers to be connected, enhancing system reliability and flexibility.

In terms of technology, the Lochinvar 999 - 750 is equipped with a user-friendly touchscreen interface. This innovative control system allows operators to monitor and adjust settings with ease, providing real-time performance data and alerts for maintenance needs. The intelligent controls optimize operation to match the heating load, further enhancing energy efficiency.

Safety is a top priority with this model. It is built with multiple safety features such as automatic shut-off valves, pressure relief valves, and flame monitoring systems, ensuring safe operation under various conditions. The unit also adheres to stringent industry standards and regulations, making it a reliable choice for commercial applications.

Furthermore, the Lochinvar 999 - 750 is designed with serviceability in mind. Its compact footprint and accessible components simplify maintenance, reducing downtime and associated costs. The unit also supports a variety of fuel sources, including natural gas, propane, and biodiesel, providing flexibility to meet different facility requirements.

In summary, the Lochinvar 999 - 750, CF-CH(E)-i&s-08,399 represents a blend of efficiency, reliability, and safety in commercial heating. Its advanced technologies and thoughtful design make it a powerful solution for various heating needs, making it an ideal choice for businesses aiming for excellence in energy management and operational efficiency.