Thomas & Betts UDAS, UDAP dimensions Troubleshooting cont’d, Cont’d

Page 36

40. Troubleshooting (cont’d)

PROBLEM (cont’d)

PROBABLE CAUSE (cont’d)

REMEDY (cont’d)

Burner will not light

10. Integrated circuit board does not power

10.

(cont’d)

main valve.

 

 

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"

 

 

w.c. for propane gas.

 

d) Cracked ceramic at sensor.

d) Replace sensor.

Burner cycle on and off

1. Gas pressure too high or too low.

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

 

 

w.c. for propane gas.

 

2. Burner not grounded

2. Make certain integrated circuit board is grounded to ignitor.

 

3. Circuit board not grounded.

3. Make certain integrated circuit board is grounded to furnace chassis.

 

4. Faulty integrated circuit board

4. If 24 volt is available to the integrated circuit board and all other

 

 

causes have been eliminated, replace board.

 

5. Combustion air proving switch

5.

 

not closing.

a) Make sure unit is properly vented.

 

 

b) Remove obstructions from vent.

 

 

c) Replace faulty tubing to pressure switch.

 

6. Faulty combustion air proving switch.

6. Replace combustion air proving switch.

 

7. Flame sensor grounded.

7. Be certain flame sensor lead is not grounded or insulation or ceramic

 

 

is not cracked. Replace as required.

 

8. Cracked ceramic at sensor.

8. Replace sensor.

 

9. Incorrect polarity.

9. Reverse line volt leads to integrated circuit board.

No heat (Heater

1. Incorrect valve outlet pressure or orifice.

1. Check valve outlet pressure. See Rating plate for manifold pressure.

Operating)

2. Cycling on limit control.

2. Check air throughput.

 

3. Improper thermostat location or adjustment.

3. See thermostat manufacturer’s instructions.

Fan or venter motor will

1. Circuit open.

1. Check wiring and connections.

not run

2. Defective integrated circuit board.

2. Replace board.

 

3. Defective motor or starter.

3. Replace motor or starter.

Fan or venter motor

1. Motor overload device cycling on and off.

1. Check motor load against motor rating plate. Replace motor if

turns on and off while

 

needed.

burner is operating

 

 

Fan or venter motor cuts

1. Low or high voltage supply.

1. Correct electric supply.

out on overload

2. Defective motor.

2. Replace motor.

 

3. Poor air flow.

3. Clean motor, fan, fan guard, filter, and coils.

 

4. Defective bearing or lubrication.

4. Lubricate bearings (motor permitting) or replace motor.

FOR SERVICE OR REPAIR, FOLLOW THESE STEPS IN ORDER:

FIRST:

Contact the Installer

 

Name __________________________________________________________

 

Address_________________________________________________________

 

__________________________________________________________

 

__________________________________________________________

 

Phone _____________________________________

SECOND:

Contact the nearest distributor (See Yellow Pages). If no listing,

 

contact Authorized Factory Representative, 1-800-695-1901 (Press 1).

THIRD:

Contact

REZNOR® / Thomas & Betts Corporation

 

 

150 McKinley Avenue

 

 

Mercer, PA 16137

 

 

Phone: (724) 662-4400

 

 

Date of

Model No. ______________Unit Serial No._____________________________ Installation _______________

(800) 695-1901; www.ReznorOnLine.com

 

©2003 Thomas & Betts Corporation, All rights reserved.

Printed in the U.S.A.

 

MANUFACTURER OF HEATING, COOLING, AND VENTILATING SYSTEMS

 

Trademark Note: Reznor® , TCORE2® , and

are trademarks of Thomas & Betts.

Form RZ-NA I-UDA, P/N 195673 Rev 5, Page 36

1/03 YL Form RZ-NA I-UDA (Version .5)

 

 

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Contents Table of Contents Series Fan-Type Unit HeatersInstallation Codes GeneralHazard Levels of Warnings in this Manual Venting Manual by ModelWarranty Uncrating and Preparation Massachusetts RequirementDimensions SizeModel Udas Separated Combustion Fan Technical Data Size 100 125Instructions for Changing Pressure Switch Pressure SwitchHigh Altitude Operation ClearancesCombustion Air applies to Model Udap and Model Model Udap and Model UDAP-CVUnit Heater Location Heater ThrowLocation Recommendations Unit Heater Location cont’d Hanging the HeaterModel Udap Size 100 125 150 175 225 250 300 350 400 Model Udas Size 100 125 150 175 225 250 300 350 400Connectors are Recommended maximum hanger rod length is 6 feet 1.8MBe sure Threaded swivel Locked toGas Piping and Pressures Sizing Gas Supply LineGas Connection Size Instructions Manifold Pressure Settings by Altitude for Canada Gas Piping and Pressures cont’dInstructions for High Altitude Derate Two -Stage ValveHigh Altitude Capacity Changes Feet MetersBurner Electrical Supply and Connections Thermostat and ConnectionsCombustion Air Proving Switch Pressure Switch Pressure Switch Settings Combustion Air ProvingLimit Control Door Switch Model Udas only Ignition System Dip SwitchNormal Heat Cycle Operating Sequence StatusLED LightsIgnition System cont’d SW1 SW2 TimeContinuous Fan Operation Fault Modes Fault Modes cont’d Lockout Gas Valve Fan MotorWiring Diagrams Operating SequenceWiring Diagrams cont’d SW1 Check Installation and Startup Check the installation prior to startup Heater StartupOperating Instructions Operating Sequence Check installation after startup Vent System Testing Procedure Model UdapMaintenance Schedule Startup cont’dUse only factory-authorized parts Heat Exchanger Maintenance Burner Maintenance Burner Removal Instructions Refer to FigureBurner Maintenance cont’d Inspect and Clean the Burner Re-Install the BurnerInstructions to Re-Install the Burner Refer to Figure Burner OrificeDSI Ignition SystemCont’d Fan BladesCombustion Air Pressure Switch Door SwitchOperating Gas Valve Udas onlyFlame Rollout Switch Sizes 30-125 only SwitchAir System Troubleshooting DisconnectGeneral Troubleshooting Venter motorWill not start Burner willTroubleshooting cont’d Cont’d

UDAP, UDAS specifications

Thomas & Betts is a well-respected name in the electrical and industrial products sector, known for its innovation and quality. Among its impressive portfolio, the UDAS and UDAP series of connectors stand out for their reliable performance and advanced features. These connectors are specifically designed to meet the rigorous demands of electrical applications in various industries.

The UDAS (Universal Disconnect Appliance Switch) and UDAP (Universal Disconnect Appliance Plug) are engineered for high-capacity applications where safety, efficiency, and ease of use are paramount. One of the main features of these connectors is their ability to deliver increased electrical resistance and durability. They are constructed from high-quality materials that can withstand extreme environmental conditions, making them ideal for outdoor and harsh industrial applications.

Another key technology employed in the UDAS and UDAP series is the quick-connect mechanism. This innovative design allows users to connect and disconnect circuits swiftly without requiring excessive force or complex tools. This is particularly beneficial in settings where downtime must be minimized and efficiency is crucial. Additionally, the connectors are designed to provide a secure, locking fit to ensure consistent electrical contact, thereby enhancing operational safety.

The UDAS and UDAP connectors are manufactured to comply with several industry standards, ensuring that they meet or exceed the requirements for electrical safety and performance. Their user-centric design features help in reducing installation time and costs, making them a preferred choice among contractors and engineers.

Furthermore, these connectors are versatile, compatible with a wide range of electrical systems, and can be employed in applications such as HVAC, lighting, and power distribution. They also come in various sizes and configurations to accommodate diverse specifications, improving customization options for different projects.

In summary, the Thomas & Betts UDAS and UDAP series stands out for their robust design, quick-connect technology, and versatility across various industrial applications. Their durability and compliance with safety standards make them an excellent choice for professionals seeking reliable connectivity solutions in demanding environments. Investing in these connectors ensures optimal performance and safety in electrical installations, showcasing Thomas & Betts' commitment to excellence in electrical components.
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