Thomas & Betts LDAP 1200 warranty Vent System, Troubleshooting

Page 38

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

 

 

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Contents Table of Contents Reznor Model LdapHazard Levels of Warnings in this Manual General Installation CodesWarranty Switches Uncrating and Preparation High Altitude OperationModel One Technical DataDimensions DownflowModel LDAP800 and Model LDAP1200 Clearances inches/mm ClearancesCombustion Air Throw feet and meters Heater LocationMounting Height Heater Throw All Models Sound Data Hanging or Mounting the Heater and Installing LouversHeater Location cont’d Location RecommendationsWall Mounting Guidelines for Wall Mounting Model Ldap HeatersGas Piping and Pressures Installing Heater and Louvers cont’dInstalling Louvers Sizing Gas SupplyHorizontal Supply Valve Outlet or Orifice Pressure SettingGas Connection Size Vertical SupplyCont’d GasPressures Supply Wiring Burners Electrical Supply ConnectionsThermostat and Connections Disconnect SwitchElectrical Supply and Connections cont’d CL7 Connections for Model Ldap 1200 with Option Thermostat and Connections cont’dMultiple Heater Control Option CL31 and Option CL32 CL1, CL2, CL3, CL7, or CL18Limit Control Combustion Air Proving Pressure SwitchesPressure Switch Settings High Limit ControlIgnition System Normal Heat Cycle Operating Sequence Abnormal Heat Cycle FunctionsIgnition System cont’d Gas Valves Fault Modes LockoutFan Motor Wiring Fan MotorsWiring Diagrams Wiring DiagramWhite = Neutral Black = High Heat Speed Wiring Diagrams cont’d Above control wiring isAbove control wiring is Line VoltageType of Vent Pipe VentingVenting Requirements VerticalJoints and Sealing Joints and Sealing cont’d Venting cont’dVenting Requirements cont’d Double Vent Wall Pipe With Sealant Pipe RunWall Ft 1M Minimum 305 mm Operating Instructions Operating Sequence Check Installation and StartupCheck the installation prior to startup Heater Startup Check installation after startup Vent System Testing ProcedureWay Discharge Louvers, Option CD32 Nozzles Maintenance ScheduleDimensions NozzleHeat Exchanger Maintenance Burner Maintenance Location of ControlsRe-Install the Burner Burner Maintenance cont’dInspect and Clean the Burner Instructions to Re-Install the Burner Refer to FigureIgnitor Flame Sensor Burner OrificesHeat Section Venter Motor and Wheel MeasurementFan Blades Heat Section Venter Motor and Wheel cont’dMain Venter Motor and Wheel Models 800 and 1200 only GuardsCombustion Air Pressure Switches Operating Gas ValvesTroubleshooting Vent SystemGeneral Troubleshooting Problem Probablecause RemedyGeneral Troubleshooting cont’d No heat Heater

LDAP 1200 specifications

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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.

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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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