Thomas & Betts RZ-NA 441-OMS Troubleshooting contd, Contact the Installer, Index

Page 12

19. Troubleshooting (cont'd)

Chart 1 (cont'd) - General Troubleshooting Guide (Check the diagnostic lights)

Symptom or Problem (cont'd)

 

Cause and Remedy (cont'd)

14. Disconnect closed; blower and burner switches in run position; control

1.

Air in pilot gas line - bleed pilot line.

switch is in "winter" position; "control power", high gas normal; "low

2.

Inadequate pilot gas pressure - verify pilot gas pressure (3.5" w.c.)

gas normal"; "firestat normal"; "system switch energized"; "starter

3.

Faulty pilot valve - replace pilot solenoid valve.

energized" and "freezestat normal" lights are lit; ignitor has reached

4.

Faulty ignition module - replace entire module.

1.4A and has opened the pilot valve bringing on the "pilot valve normal"

 

 

light; but the pilot flame is not present. (After two trials the unit will go

 

 

into safety lockout requiring cycling of the main disconnect switch.)

 

 

 

 

 

15. Disconnect closed; blower and burner switches in run position;

1.

Microamp signal on flame rod is inadequate - check position and

control switch is in "winter" position; all status lights are lit

 

condition of flame rod and signal (minimum 0.5 microamps required.)

except "main valve normal" light. The pilot flame is present

2.

Grounding for unit or flame rod inadequate - check ground path.

and stable, but the (low stage portion or) main gas valve will not

3.

Faulty main gas valve - replace main gas valve.

open, or rapid cycling of the main valve is occurring.

4.

Faulty ignition module - replace ignition module.

 

5.

Inadequate main gas pressure - verify main burner pressure.

 

 

 

16. Disconnect closed; blower and burner switches in run position;

1.

Faulty main gas valve - replace main gas valve.

control switch is in "winter" position; all status lights are lit; the

2.

Inadequate timing on high fire time delay relay - adjust setting.

pilot flame and low fire on the main burner are present and stable,

3.

Faulty high fire time delay relay - replace time delay relay.

but the unit will not progress to a high fire condition.

4.

High stage relay contacts are not closed - check control setting.

 

5.

Inadequate main gas pressure - verify main burner gas pressure.

 

6.

Faulty high stage relay - replace relay.

 

7.

Faulty ignition module - replace entire module.

 

 

 

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

Model No.

_____________________________________________

Unit Serial No.

_____________________________________________

Date of Installation _____________________________________________

Index

Page

Air Pressure

4

Air Pressure Switches

6

Blower Bearings

3

Circuit Indicator Board

4

Control Locations

5

Damper Motor

9

Direct-Fired Burner

7

Dirty Filter Switch

10

Drive Components

3

Electronic Circuit Board with

 

Diagnostic Lights

5

Emergency Cut Off

6

Index

Page

Index

Page

Filters

3

Manifold Arrangements

8

Firestat

10

Operation/Service Section

5-12

Freezestat

10

Outside Air Cutoff Control

8

Gas Control Systems

7

Photoelectric Smoke Detector

10

Gas Pressure

3

Photohelic Pressure Sensor

10

Gas Pressure Switches

8

Pilot Assembly

4

Inlet Air Controls

9

Potentiometer

9

Limit Control

5

Pressure Null Switch

9

Main Burner

4

Sensing Pressure Check

6

Maintenance Schedule

2

Troubleshooting

11

Maintenance Section

2-4

Wiring Diagram

In the main

Maintenance/Service Access

2

electrical box on the unit

 

 

 

 

©2001 Thomas & Betts Corporation, All rights reserved.

Printed in the U.S.A.

 

 

 

 

MANUFACTURER OF HEATING, COOLING, AND VENTILATING SYSTEMS

 

 

 

 

 

 

Trademark Note: Reznor® is registered in the United States and other countries.

 

 

 

 

 

 

 

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

 

Page 12

 

 

8/01 YL Form 441OMS (Version .1)

 

Page 11 Page 12
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Page 11 Page 12
Contents Operating/Maintenance/Service Instructions Table of ContentsMaintenance Section Maintenance ScheduleDrive Components 1A. Blower Bearings1B. Blower Belts 2. FiltersCircuit Indicator Board check lights Main Burner and Pilot AssemblyAir Pressure Controls Location, Operation, and Service Electronic Circuit Board with Diagnostic LightsTemperature Limit Safety Controls Manual Reset Limit Control BlowerTemperature Limit Safety Controls contd Air Pressure SwitchesIgnition System Direct-Fired Burner Electronic Modulation Gas Control Option AG37Selector, P/N Gas Pressure Switches Manifold ArrangementsCutoff Control Door Switch Option BX1 required on C.G.A.-certified units Inlet Air ControlsDirty Filter Switch Inlet Air Controls contdPhotoelectric Smoke Detector Option SA1 Firestat Option BD5Troubleshooting Troubleshooting contd Contact the InstallerContact Index

RZ-NA 441-OMS specifications

The Thomas & Betts RZ-NA 441-OMS is a cutting-edge component designed for advanced electrical applications, known for its reliability and performance. This product stands out in the market due to its innovative features and robust design, making it ideal for a variety of industrial and commercial uses.

One of the main features of the RZ-NA 441-OMS is its superior connectivity capabilities. The component is engineered to provide seamless integration with multiple electrical systems, ensuring efficient power distribution and minimal downtime. The versatility of this device enables it to be utilized in various setups, including complex machinery and sophisticated automation processes.

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In terms of installation, the RZ-NA 441-OMS is designed for ease of use. Its compact design allows for quick and straightforward mounting, saving valuable time during setup. Additionally, it features customizable configurations, making it suitable for various application needs. This flexibility is particularly beneficial for companies seeking to optimize their operations while ensuring compatibility with existing infrastructure.

Moreover, the RZ-NA 441-OMS is supported by extensive documentation and customer service, ensuring that users have access to the information and assistance they need for effective implementation and troubleshooting.

Overall, the Thomas & Betts RZ-NA 441-OMS represents a significant advancement in electrical connectivity solutions, combining robustness, versatility, and safety in a single package. Its innovative features make it an essential component for businesses looking to enhance their electrical systems reliably and efficiently.
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