Thomas & Betts LDAP 1200 Burner Orifices, Heat Section Venter Motor and Wheel, Measurement

Page 35

31.Burner Orifice(s)

2.Attach the Gas Train - Slide the gas train so that the orifice adapter is through the bracket. Fasten the gas train to the bracket with the locking nut. Install the gas orifice. Re-connect the wires to the gas valve. Re-connect the union(s) inside of the control compartment.

3.Reconnect the gas supply at the union outside of the cabinet. Turn on the gas supply and leak test the connections with leak detecting solution.

4.Close the access panel.

5.Turn on the electric. Check for proper operation.

A burner orifice usually only needs to be replaced when installing a gas conversion kit. If ordering replacement orifice(s) only, give BTUH content and specific gravity of gas, as well as the model and serial number of the heater. When removing or replacing a burner orifice, use two wrenches being careful not to damage the venturi tube and/or the bracket.

32.Ignition System

DSI Integrated Control Module (circuit board) - See FIGURE 24. The module monitors the operation of the heater including ignition. The only replaceable compo- nent is the 3 amp Type ATC or ATO fuse. If the fuse is blown, the problem is most likely an external overload. Correct the problem and replace the fuse.

FIGURE 24 - DSI

Integrated Control

Module (Circuit

Board)

Only replaceable part is a Type ATC or ATO 3 amp fuse (Color Code Violet), P/N 201685

Do not attempt to disassemble the control mod- ule. However, each heating season check the lead wires for insulation deterioration and good connections. Size 400 has one control mod- ule; Size 800 has two control modules; and Size 1200 has three control modules.

Proper operation of the direct spark ignition system requires a minimum flame signal of 1.0 microamps as measured by a microampmeter. For further information and check out proce- dure on the direct spark ignition system, refer to Paragraph 19 and the Troubleshooting Flow Chart in Paragraph 43.

CAUTION: Due to high voltage on the spark wire and electrode, do not touch when energized. See Hazard Levels, page 2.

Ignitor

Flame Sensor

33.Heat Section Venter Motor and Wheel

Ignitor - Refer to FIGURE 22 and locate the ignitor. Disconnect the wire; remove the screw and the ignitor. Clean the ignitor assembly with an emery cloth.

Spark gap must be maintained to 1/8". See FIGURE 25.

FIGURE 25 - Ignitor

 

showing required

 

Spark Gap

1/8 inch

measurement

(3.2mm)

 

IMPORTANT: When re-assembling, the brown ground wire must remain attached to the ignitor.

CAUTION: Due to high voltage on the spark wire and electrode, do not touch when energized. See Hazard Levels, page 2.

Flame Sensor - Refer to FIGURE 22 and locate the flame sensor. Disconnect the wire; remove the screw and the flame sensor. Clean with an emery cloth.

Remove dirt and grease from the motor casing, the venter housing, and the venter wheel. Venter motor bearings are permanently lubricated. Follow these instructions for replacement of the venter motor and wheel assembly. Keep all hardware re- moved to be used in re-assembling and installing the replacement parts.

Form RZ-NA-I-LDAP, P/N 207733 (Rev 2), Page 35

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Contents Reznor Model Ldap Table of ContentsHazard Levels of Warnings in this Manual General Installation CodesWarranty Uncrating and Preparation High Altitude Operation SwitchesDownflow Technical DataDimensions Model OneModel LDAP800 and Model LDAP1200 Clearances inches/mm ClearancesCombustion Air Throw feet and meters Heater LocationMounting Height Heater Throw All Models Location Recommendations Hanging or Mounting the Heater and Installing LouversHeater Location cont’d Sound DataGuidelines for Wall Mounting Model Ldap Heaters Wall MountingSizing Gas Supply Installing Heater and Louvers cont’dInstalling Louvers Gas Piping and PressuresVertical Supply Valve Outlet or Orifice Pressure SettingGas Connection Size Horizontal SupplyCont’d GasPressures Burners Electrical Supply Connections Supply WiringThermostat and Connections Disconnect SwitchElectrical Supply and Connections cont’d CL7 CL1, CL2, CL3, CL7, or CL18 Thermostat and Connections cont’dMultiple Heater Control Option CL31 and Option CL32 Connections for Model Ldap 1200 with OptionHigh Limit Control Combustion Air Proving Pressure SwitchesPressure Switch Settings Limit ControlIgnition System Abnormal Heat Cycle Functions Normal Heat Cycle Operating SequenceIgnition System cont’d Fan Motors Fault Modes LockoutFan Motor Wiring Gas ValvesWiring Diagram Wiring DiagramsWhite = Neutral Black = High Heat Speed Above control wiring is Wiring Diagrams cont’dLine Voltage Above control wiring isVertical VentingVenting Requirements Type of Vent PipeJoints and Sealing Double Vent Wall Pipe With Sealant Pipe Run Venting cont’dVenting Requirements cont’d Joints and Sealing cont’dWall Ft 1M Minimum 305 mm Operating Instructions Operating Sequence Check Installation and StartupCheck the installation prior to startup Heater Startup Vent System Testing Procedure Check installation after startupNozzle Maintenance ScheduleDimensions Way Discharge Louvers, Option CD32 NozzlesLocation of Controls Heat Exchanger Maintenance Burner MaintenanceInstructions to Re-Install the Burner Refer to Figure Burner Maintenance cont’dInspect and Clean the Burner Re-Install the BurnerMeasurement Burner OrificesHeat Section Venter Motor and Wheel Ignitor Flame SensorGuards Heat Section Venter Motor and Wheel cont’dMain Venter Motor and Wheel Models 800 and 1200 only Fan BladesOperating Gas Valves Combustion Air Pressure SwitchesVent System TroubleshootingProblem Probablecause Remedy General TroubleshootingNo heat Heater General Troubleshooting cont’d

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.

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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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