38.Limit Control

39.High Limit Control

40.Transformer

41.Adjustable Fan Control

If it is determined that the automatic reset limit control needs re- placing, use only a factory-authorized replacement part that is de- signed for the size of heater.

For approximate limit location, see FIGURE 22, page 34.

A manual reset high limit control is located at the top of each heat section. Do not reset high limit control without correcting the prob- lem. If it is determined that the limit control needs replacing, use only a factory-authorized replacement part that is designed for the size of heater.

See FIGURE 22, page 34, for location. Use a voltmeter to verify that there are 24 volts output from the transformer. If the trans- former is not functioning, it must be replaced. Use a replacement transformer identical to the factory-installed model.

See FIGURE 22, page 34, for location. Check the wiring connec- tions and the adjustment knob.

If it is determined that the destratification fan control needs re- placing, use only a factory-authorized replacement part that is de- signed for the heater.

42. Vent System

Check the complete vent system at least once a year. Inspection should include all

 

 

joints, seams, and the vent terminal cap. Clean openings. Replace any defective parts.

43. Troubleshooting

Check the Lights on the DSI Integrated Control Module (Circuit Board)

The integrated circuit board monitors the operation of the heater and includes two LED signal lights that indicate normal operation and various abnormal conditions. If the heater fails to operate properly, check this signal to determine the cause and/or to eliminate certain causes. See operating sequence in Paragraph 19.

Do not attempt to repair the DSI integrated control module; the only field replaceable component is the fuse.

IMPORTANT: When using a

Control Status - GREEN LED Codes

Flame Status - YELLOW LED Codes

Steady On

Normal Operation - No call for heat.

Steady On

Flame is sensed.

multimeter to troubleshoot the

Fast Flash

Normal Operation - Call for heat.

Slow Flash

Weak flame (current below

24 volt circuit, place the meter’s

 

 

 

1.0 microamps ±50%)

test leads into the 5 or 9 pin

 

 

 

1 Flash

System Lockout (failed to detect or

Fast Flash

Undesired flame (valve

connectors located on the

 

sustain flame)

 

open and no call for heat).

ignition control. Do not remove

 

 

 

 

2 Flash

Main combustion air pressure

 

 

connectors or terminals from

 

switch or heat section pressure

 

 

the electrical components.

 

switch does not close with 30

 

 

Doing so can result in misinter-

 

seconds of venter being energized.

 

 

preted readings due to the

3 Flash

Limit or high limit switch open.

 

 

ignition control board’s fault

4 Flash

Main combustion air pressure

 

 

mode monitoring circuits.

 

switch or heat section pressure

 

 

 

 

switch is closed before venter is

 

 

 

 

energized.

 

 

 

Steady Off

Blown fuse; No power; or Defective

 

 

Form RZ-NA-I-LDAP, P/N 207733 (Rev 2),

 

board

 

 

Page 38

 

 

 

Page 37 Page 39
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Image 38
Thomas & Betts LDAP 1200 warranty Vent System, Troubleshooting
Page 37 Page 39

LDAP 1200 specifications

The Thomas & Betts LDAP 1200 is a cutting-edge lighting control system designed specifically to enhance energy efficiency, reduce operational costs, and promote flexibility in various lighting applications. Ideal for commercial and industrial environments, the LDAP 1200 integrates advanced technologies to create a robust solution for managing lighting systems.

One of the standout features of the LDAP 1200 is its intelligent control capabilities. With occupancy sensors and daylight harvesting technology, the system can automatically adjust lighting levels based on the presence of people and the amount of natural light available. This results not only in energy savings but also in improved occupant comfort.

The LDAP 1200 is designed for easy installation and configuration. Its modular design allows for scalability, making it suitable for both small spaces and large commercial projects. The system supports a variety of lighting types, including LED, fluorescent, and incandescent, ensuring compatibility with existing infrastructure.

User-friendly interfaces are another key characteristic of the LDAP 1200. Operating through a centralized control panel or a mobile app, users can easily monitor and adjust lighting settings, schedule operations, and receive real-time feedback. This level of control empowers facility managers to respond quickly to changing needs and optimize lighting performance.

In terms of energy management, the LDAP 1200 integrates seamlessly with building management systems (BMS), enabling complex scheduling and reporting functions. The system collects data on energy usage, helping organizations to track performance and implement strategies to further reduce consumption.

Durability and reliability are paramount in industrial applications, and the LDAP 1200 does not disappoint. Constructed with high-quality materials, the system is designed to withstand everyday wear and tear. Its robust architecture ensures that it will function effectively in various environmental conditions.

In summary, the Thomas & Betts LDAP 1200 is a versatile and efficient lighting control solution that plays a critical role in enhancing energy efficiency, reducing costs, and improving user experience. With its intelligent control features, user-friendly interfaces, and compatibility with various lighting types, the LDAP 1200 represents a significant advancement in lighting technology, making it a smart choice for modern facilities seeking to optimize their lighting systems.
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