Thomas & Betts LDAP 1200 warranty General Troubleshooting, Problem Probablecause Remedy

Page 39

DSI Integrated

Control Module

(Circuit Board) Trial

Troubleshooting

Flowchart

Trial for

 

Is there a

NO

 

Is there

YES

Ignition

 

spark across gap at

 

 

spark voltage at

 

 

 

 

 

Call for Heat

 

ignitor?

 

 

control?

 

 

 

YES

 

 

NO

 

 

 

 

Check wiring and/or

NO

Is there

YES

 

 

 

24VAC transformer

 

24V P1-2 to power

 

 

 

 

output.

 

control?

 

Check high voltage wire continuity.

Replace control module.

Is there minimum

Is there

YES minimum flame current

flame current at the flame

sensor?

at the control

module?

 

YES

Does gas

NO

 

ignite?

 

YES

Replace control

YES Is gas flowing? NO

 

module.

 

 

 

NO

NO

 

 

 

 

 

YES

 

Check connections to

Check gas pressure and

 

YES

 

Clean

Is the flame sensor

flame sensor or

supply voltage. If either YES

Is the ignitor

Is there

flame

 

corroded?

moisture in bulkhead

are low, correct and

position correct in the

Replace gas valve.

24VAC at the gas

sensor.

 

gas flow?

 

valve?

 

 

connector.

repeat startup.

 

 

 

 

 

 

 

NO

Is the sensor

YES

located in flame

 

correctly?

 

 

NO

 

 

NO

Replace flame

Reposition spark

Check wiring and

YES

Is there 24VAC from

sesnsor.

ignitor.

connections to gas

 

gas valve output on control

valve.

 

module to chassis?

 

 

 

NO

NO

 

Repositon flame

Replace ignition

sensor.

control module.

General Troubleshooting

PROBLEM

PROBABLECAUSE

REMEDY

Venter motor will

1. No power to unit.

1. Turn on power; check supply fuses or main circuit breaker.

not start

2. No 24 volt power to integrated circuit board.

2. Turn up thermostat; check control transformer output.

 

3.

Integrated circuit board fuse blown.

3.

Correct cause. Replace fuse (type ATC or ATO, 32VDC, 3A).

 

4.

No power to venter motor.

4.

Tighten connections at circuit board and/or motor terminals.

 

5.

Integrated circuit board defective.

5.

Replace intergrated circuit board.

 

6.

Defective venter motor.

6.

Replace venter motor. See Paragraph 32.

Burner will

1. Manual valve not open.

1. Open manual valve.

not light

2. Air in the gas line.

2. Bleed gas line (initial startup only).

 

3.

Gas pressure too high or too low.

3.

Supply pressure should be 5" - 14" w.c. for natural gas or 11" - 14"

 

 

 

w.c. for propane gas.

 

4.

No Spark:

4.

 

 

a) Loose wire connections.

a) Be certain all wire connections are solid.

 

b) Transformer failure.

b) Be sure 24 volts is available.

 

c) Incorrect spark gap.

c) Maintain spark gap at 1/8".

 

d) Spark cable shorted to ground.

d) Replace worn or grounded spark cable.

 

e) Spark electrode shorted to ground.

e) Replace if ceramic spark electrode is cracked or grounded.

 

f) Burner not grounded.

f) Make certain integrated circuit board is grounded to ignitor.

 

g) Circuit board not grounded.

g) Make certain integrated circuit board is grounded to furnace chassis.

 

h.) Unit not properly grounded.

h.) Make certain unit is properly field grounded to earth ground and

 

 

 

properly phased (L1 to hot lead L2 to neutral).

 

i) Integrated circuit board fuse blown.

i) Correct cause. Replace fuse (type ATC or ATO, 32VDC, 3A).

 

j.) Faulty intergrated circuit board.

j) If 24 volt is available to the integrated circuit board and all other causes

 

 

 

have been eliminated, replace board.

 

5.

Lockout device interrupting control circuit by above causes. 5. Reset lockout by interrupting control at the thermostat or main power.

 

6.

Combustion air proving switch

6.

 

 

not closing.

a) Make sure unit is properly vented.

 

 

 

b) Remove obstructions from vent.

 

 

 

c) Replace faulty tubing to pressure switch.

 

7.

Faulty combustion air proving switch.

7.

Replace combustion air proving switch.

 

8.

Main valve not operating.

8.

 

 

a) Defective valve.

a) If 24 volt is measured at the valve connections and valve remains

 

 

 

closed, replace valve.

 

b) Loose wire connections

b) Check and tighten all wiring connections.

 

9.

Integrated circuit board does not power main valve.

9.

 

 

a) Loose wire connections.

a) Check and tighten all wiring connections.

 

b) Flame sensor grounded.

b) Be certain flame sensor lead is not grounded or insulation or ceramic is

 

 

 

not cracked. Replace as required.

 

c) Incorrect gas pressure.

c) Supply pressure should be 5" - 14" w.c. for natural gas or 11" - 14"

 

d) Cracked ceramic at sensor.

w.c. for propane gas.

 

d) Replace sensor.

Form RZ-NA-I-LDAP, P/N 207733 (Rev 2), Page 39

Page 38 Page 40
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Page 38 Page 40
Contents Reznor Model Ldap Table of ContentsGeneral Installation Codes WarrantyHazard Levels of Warnings in this Manual Uncrating and Preparation High Altitude Operation SwitchesDownflow Technical DataDimensions Model OneModel LDAP800 and Model LDAP1200 Clearances Combustion AirClearances inches/mm Heater Location Mounting Height Heater Throw All ModelsThrow feet and meters 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 SupplyGas PressuresCont’d Burners Electrical Supply Connections Supply WiringDisconnect Switch Electrical Supply and Connections cont’dThermostat and Connections 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 Check Installation and Startup Check the installation prior to startup Heater StartupOperating Instructions Operating Sequence 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 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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