Installation and

Service Manual

CAUTION: Control panel is heavy and awkward to handle when removed. Carefully support the control panel when removing.

Ignition and Control Timings

Proven Pilot Hot Surface Ignition System M-9 on 990,000 through 2,070,000 Btu/hr models with two hot surface ignition modules.

Hot Surface Ignition Module Timings (Nominal)

Prepurge:

15 Seconds

Hot Surface Igniter Heat-up Time:

25- 35 seconds

Main Burner Flame Establishing Period:

4 Seconds

Failure Response Time:

0.8 Seconds at less than 0.5 µA flame current

Flame Current:

5 - 15 µA

Time Delay Between Stages 1&2 and 3&4*:

15 Seconds

399,999 - 750,000 TIME DELAY stages 1 and 2 ONLY.

Note: Delay starts from the beginning of the ignition process. In order to achieve a 15 second delay, a 60 second delay would have to be programmed. Allow 45 seconds for the ignition process.

Post-purge:

30 Seconds

Pump Delay Timing:

30 seconds minimum after burner shutdown up to a value of ΔT MIN (adjustable from 1°F to 20°F)

*You can program a time delay of up to five minutes into the temperature controller. This only applies to Mode 1 and Mode 2 operation. Mode 3 does not have any stage delay capability. It is recommended, but not required, that the building control system have a delay between the stages to allow time for the system temperature to settle before additional stages are applied to the load. This will help prevent short cycling.

OPERATION AND DIAGNOSTIC LIGHTS

The control panel has up to 11 indicating and diagnostic lights to show all major steps of operation and control sensed malfunctions.

FIG. 53 Exterior Control Panel with Operation/Diagnostic Lights and LCD Display

 

TABLE-V

Status LED Diagnostic Codes

Code

 

Sequence

Condition Lights

Prepurge 1

Operation of combustion

 

air fans before ignition on

 

stages 1 and 2.

Prepurge 2

Operation of combustion

 

air fans before ignition on

 

stages 3 and 4.

Trial for Ignition 1

Hot surface igniter 1

 

preparing to light

 

burners.

Trial for Ignition 2 (if equipped) Hot surface igniter 2

 

preparing to light burners.

Stage 1 On

Burners for stage 1

 

operating.

Stage 2 On

Burners for stage 2

 

operating.

Stage 3 On (if equipped)

Burners for stage 3

 

operating.

Stage 4 On (if equipped)

Burners for stage 4

 

operating.

Status 1

Remote status light

 

for ignition module #1.

Status 2 (if equipped)

Remote status light for

 

ignition module #2.

Alarm

Indicates flame failure on

 

either ignition module and

 

will indicate additional

 

alarms if the alarm on any

 

failure option is

 

purchased.

 

 

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Lochinvar 999 - 750 Operation and Diagnostic Lights, Ignition and Control Timings, Table-V, Status LED Diagnostic Codes
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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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