Thomas & Betts RZ-NA 441-OMS Controls Location, Operation, and Service, Cabinet

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Operation/Service Section

Controls - Location, Operation, and Service

To service this system, it is necessary to understand the normal operation of the controls and the function of the diagnostic circuit board. Refer to the electrical box drawing in Figure 7 and to the individual illustrations to identify and locate each of the controls. The wiring diagrams for this unit are located in the main electrical box.

WARNING: Service work on this system should only be done by a qualified gas ser- vice person. The service information and the troubleshooting guides are intended as an aid to a qualified service person.

Figure 7 - Control Locations

Control

Outside Air Cutoff

Time Delay

 

Relays

(high ambient limit control)

Relay

24-volt Terminals

Ignition

Module

Maxitrol Amplifier

Circuit

or Signal Conditioner

Board

 

Bypass

Damper

Motor

Status Lights

-Volt Terminals

Transformer

Service

Switches

24

 

Return

Air

Damper

Motor

Motor

Starter

High Low

Optional

Optional Bypass Damper

Standard Pressure

Relay for

Dirty Filter

Pressure Switches

Switches

Optional 2-Speed

Pressure Switch

 

 

 

NOTE: Wiring diagrams for the unit are located on the inside of the electrical box door.

Starter

Line Voltage

Relay

Terminals

7.Electronic Circuit Board with Diagnostic Lights

Location: Control Compartment Electrical Box (See Figure 7)

Function: The diagnostic lights on the circuit board are designed to assist in troubleshooting. When the system is operating properly, the lights on the circuit board are lit. If the system fails to operate properly, all lights on the circuit board up to that one that represents the component or system that has failed will be lit. For more detailed information, refer to the Trouble- shooting Guide in Paragraph 19.

Figure 8 -

 

 

 

 

Diagnostic

 

 

Column of 13

Circuit

Board,

indicator

P/N 151263

bulbs; always

 

replace

 

burned out

 

bulbs, P/N

 

125189.

8. Temperature Limit Safety Controls

Location: 1) Manual Reset Limit Switch is mounted on a 2x4 electrical box located in the blower section. To access the manual reset, remove the blower section access panel to the left of the discharge (left when facing the discharge); 2) Emergency Cutoff Limit Control is in the burner/control cabinet just above the electri- cal box.

• Manual Reset Limit Control - Blower

Cabinet

 

Figure 9 -

Function: The

Manual Reset

manual reset limit

Limit

is a temperature

 

activated safety

Capillary tubing is

control. Re-start

in a holder that

of the system can

extends into the

be done only after

the limit control is

 

cooled and the reset button is depressed.

CAUTION: If the manual reset limit activates, find and correct the cause before re-starting the system.

Service: Failure of the manual reset limit requires replacement of the control.

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Contents Table of Contents Operating/Maintenance/Service InstructionsMaintenance Schedule Maintenance Section1A. Blower Bearings Drive Components1B. Blower Belts 2. FiltersAir Pressure Circuit Indicator Board check lightsMain Burner and Pilot Assembly Electronic Circuit Board with Diagnostic Lights Controls Location, Operation, and ServiceTemperature Limit Safety Controls Manual Reset Limit Control BlowerIgnition System Temperature Limit Safety Controls contdAir Pressure Switches Selector, P/N Direct-Fired BurnerElectronic Modulation Gas Control Option AG37 Cutoff Control Gas Pressure SwitchesManifold Arrangements Inlet Air Controls Door Switch Option BX1 required on C.G.A.-certified unitsInlet Air Controls contd Dirty Filter SwitchPhotoelectric Smoke Detector Option SA1 Firestat Option BD5Troubleshooting Contact the Installer Troubleshooting contdContact 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.

Another notable characteristic of the RZ-NA 441-OMS is its remarkable insulation properties. The device is built with high-quality materials that enhance its thermal stability and resistance to environmental factors. This ensures that it can withstand harsh conditions while maintaining optimal functionality, making it a reliable choice for outdoor applications and areas with extreme temperatures.

The RZ-NA 441-OMS also incorporates advanced safety features, such as overcurrent protection and fault detection systems. These technologies are designed to prevent electrical failures, safeguarding both the equipment and personnel involved. This emphasis on safety aligns with Thomas & Betts’ commitment to providing reliable solutions that prioritize user protection and system integrity.

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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