Hydronic Heating Boilers and Domestic Water Heaters

Table of Contents

General Product Information . . . . . . . . . . . . . . . . . . . . . . . . .3 Special Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Product Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Locating Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Clearances from Combustible Construction . . . . . . . . . .6 Base for Combustible Floors . . . . . . . . . . . . . . . . . . . . .7 Freeze Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Pump Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Hydronic System Antifreeze . . . . . . . . . . . . . . . . . . . . . .7 Outdoor Boiler Installation . . . . . . . . . . . . . . . . . . . . . . .7 Shutdown and Draining . . . . . . . . . . . . . . . . . . . . . . . . .8 Freeze Protection for a Heating Boiler System . . . . . . . . . . .8 Combustion and Ventilation Air . . . . . . . . . . . . . . . . . . .8 Combustion Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Combustion Air Options . . . . . . . . . . . . . . . . . . . . . . . . .9 Exhaust Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Venting Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Vertical Vent Termination Clearances and Location . .11 Sidewall Vent Termination Clearances and Location . .12 Combustion Air Inlet Piping . . . . . . . . . . . . . . . . . . . . .13 Combined Air Inlet Points . . . . . . . . . . . . . . . . . . . . . .15 Vent System Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Barometric Damper Location . . . . . . . . . . . . . . . . . . . .15 1. Conventional Negative Draft Venting . . . . . . . . . . .16

2. Vertical DirectAire™ Venting . . . . . . . . . . . . . . . . . . .17

3. Sidewall Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

4. Horizontal DirectAire™ Venting . . . . . . . . . . . . . . . .21

5. Direct Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

6. Outdoor Installation Venting . . . . . . . . . . . . . . . . . .26 Connecting to Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . .28 Gas Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 Connecting Gas Piping to Unit . . . . . . . . . . . . . . . . . . .28 Gas Train and Controls . . . . . . . . . . . . . . . . . . . . . . . . .29 Combination Gas Valves . . . . . . . . . . . . . . . . . . . . . . .30 Venting of Combination Gas Valves . . . . . . . . . . . . . .30 Checking Gas Supply Pressure . . . . . . . . . . . . . . . . . . .30 Gas Manifold Pressure Adjustment . . . . . . . . . . . . . . .31 Connecting to Water Supply . . . . . . . . . . . . . . . . . . . . . . . .32 Inlet and Outlet Connections . . . . . . . . . . . . . . . . . . . .32 Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 Water Flow Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 Low Water Cutoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 Connecting to Electrical Supply . . . . . . . . . . . . . . . . . . . . .33 Boiler System Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 Primary/Secondary Boiler Piping . . . . . . . . . . . . . . . . .35

Table of Contents

Low Temperature Return Water Systems . . . . . . . . . . .36 Radiant Floor and Snow Melt Heating Systems . . . . . .37 Boiler Flow Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 Boiler Bypass Requirements . . . . . . . . . . . . . . . . . . . . .38 Temperature/Pressure Gauge . . . . . . . . . . . . . . . . . . . . .38 Placing the Boiler in Operation . . . . . . . . . . . . . . . . . . .38 Installation with a Chilled Water System . . . . . . . . . . .39 Boiler Operating Temperature Control . . . . . . . . . . . . .39

Water Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Terminal Strip Connection Options . . . . . . . . . . . . . . .40

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Lighting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . .42

To Turn Off Gas To Appliance . . . . . . . . . . . . . . . . . . .43

Programming Temperature Control . . . . . . . . . . . . . . .43

Quick Programming Overview . . . . . . . . . . . . . . . . . . .43

Adjust Menu Setting Descriptions . . . . . . . . . . . . . . . .44

Access Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Placement of Sensors . . . . . . . . . . . . . . . . . . . . . . . . . .46

Staging Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Hot Surface Ignition System . . . . . . . . . . . . . . . . . . . . . . . .49

Operation and Diagnostic Lights . . . . . . . . . . . . . . . . . . . . .51

Domestic Water Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Water Velocity Control . . . . . . . . . . . . . . . . . . . . . . . . .52

Water Chemistry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Pipe Size Requirements . . . . . . . . . . . . . . . . . . . . . . . .53

Circulating Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Minimum Pump Performance . . . . . . . . . . . . . . . . . . . .54

Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Potable Hot Water Temperature Control Settings . . . . .54

Location of Cold Water Supply Piping Connections . .55

High Water Temperature Limit Control . . . . . . . . . . . .55

Optional Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . .55

Thermal Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Cathodic Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Cleaning and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . .56

Combustion and Ventilation Air . . . . . . . . . . . . . . . . . .57

Adjusting Differential Air Pressure . . . . . . . . . . . . . . . .58

Servicing Hot Surface Igniter and Ignition Module . . .59

Ignition System Checkout . . . . . . . . . . . . . . . . . . . . . . .59

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Troubleshooting Guide 399,999 - 750,000 Btu/hr Models . . . . . . .62

Troubleshooting Guide 990,000 - 2,070,000 Btu/hr Models . . . . . .63

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

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Lochinvar 399, 999 - 750, CF-CH(E)-i&s-08 service manual Hydronic Heating Boilers and Domestic Water Heaters
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399, CF-CH(E)-i&s-08, 999 - 750 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.
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