Roberts Gorden NEMA 4 installation manual Chart, Troubleshooting Flow

Page 43

START

Set the setpoint above the

 

 

 

 

zone temperature. Verify

No

Is the power light on the

 

Are pump and/or burners

 

 

scheduling times and adjust

control panel lit?

Yes

turning on and off erratically? No

 

the correct setpoint (occupied

 

 

 

 

or setback). Verify zone

 

 

 

 

temperature sensor reading

 

 

 

Yes

on the Board Status screen.

 

 

 

 

Does the pump turn ON?

 

 

 

Are shield wires from RS-485

Yes

 

 

 

communication bus wiring and

 

 

 

 

VFD 0-10 V signal wiring

 

 

 

 

correctly twisted and/or

 

 

 

 

grounded?

 

 

 

 

Yes

 

 

 

 

Contact your

 

 

 

 

ROBERTS GORDON®

 

 

 

 

Independent Distributor.

 

No

 

 

 

 

 

No

 

 

 

 

Is the power light bulb

 

Replace 24 V power 1 A fuse

 

 

 

on relay board. See Section 8.

 

 

burnt out?

 

 

Is the pump light on the

controller lit?

No

Is the bulb for the pump light on the controller burnt out?

No

No

Yes

FIGURE 24:

SECTION 9:

Troubleshooting Flow

TROUBLESHOOTING

Chart

 

Yes

Yes

Yes

No

Is the 24 Vac switch on the

relay board on?

Yes

Is the green power LED on No the control board lit?

 

Yes

 

No

Is the red “RUN” LED on

No

the control board blinking?

Yes

On the Manual Override

Yes screen (Alt+M), set the pump No status to "Auto".

Does the pump go on?

Yes

Is there 120 V at the relay

board power input terminals No L1 and L2?

No

Is there 24 Vac across the

24 V control board power Yes supply terminals on the

relay board?

Press the reset button on

the control board. Is the No red "RUN" light blinking.

Are current conditions being continually updated on the No

Board Status screen?

Check circuit breaker and controller power supply.

Is there 24 Vac at the 24 V

No

control board power input?

 

Yes

Contact your

ROBERTS GORDON®

Independent Distributor.

Verify communication wiring between PC and controller. Verify wiring between sensor No and controller. Verify shield

wires are twisted and/or grounded. Does the pump light on the controller turn on?

Yes

Rectify wiring between 24

V control board power supply and 24 V control board power input.

No

On the Manual Override screen (Alt+M), set the pump status to ON. Does the pump light on the controller come on?

Yes

Yes

SECTION 9: TROUBLESHOOTING

37

Image 43 Roberts Gorden NEMA 4 installation manual Chart, Troubleshooting Flow
Contents Owner InstallerPage Roberts-Gordon LLC Page Table of Figures Page Introduction Carton Contents Urvsc Ultravac Satellite Controller Inside View Urvccm Ultravac Central Controller with ModemUrvccr Ultravac Central Controller with RS-485 Converter Manpower Requirements SafetyExample Site Layout Example Site Layout Specifications Control Relay BoardController Enclosure Nema 4 Models Variable Frequency Drive VFD Enclosure Standard ModelsElectrical Variable Frequency Drive Components Factory pre-wiring shown Preparation InstallationIndoor Sensor Cable Cable Requirements 3.3.1 Line Power SupplyControl Wiring 5 RS-485 Communication Wire Between ControllersVariable Frequency Drive Requirements Variable Frequency Drive MountingOutside Air Supply Indoor Sensor PlacementCentral Controller Communication Equalization Wiring Typical External Diagrams120 BMS Enable Optional60 Hz 230 460 Pump60 Hz See Note To Satellite ControllerFor 115 V For 460 Input Input VFD VFD models Supply Input VFD model shown See NoteTCP/IP communication module CommunicationsDedicated Phone Line for Central Controller Modem + Central Controller RS-485 Converter for Central ControllerTo Controller #2 Set to onTCP/IP Communication Module Mounting Red + RJ-11 Jack Black RS-45 Jack Module power wireOhm resistor included Ethernet Cable To LANDirect Connect Order 1,2,3,4,5,6,7,8 Switch OrderController Number Values 1=ON, 0=OFFRepeater Repeater WiringVariable Frequency Drive Programming VFD Parameter Settings For Use WithRoberts Gordon Ultravac Altering VFD Parameters Parameter Factory New Number Name DefaultCommissioning the Corayvac System Setting The Corayvac End Burner VacuumEnd Vent Vacuum Approximate reading after adjustingPossible Damper Couplings’ Locations Parameter Factory New Number Name Default Setting Roberts Gordon Ultravac Controller Replacement Parts Replacement PartsDescription Part Number Variable Frequency Drive Components Diagram Variable Frequency Drive Replacement PartsVariable Frequency Drive VFD Control Board Power LED4 24V Power 1 a Fuse 3 10080122 Eprom ChipVariable Frequency Drive 25 a or 10 a Fuse Troubleshooting Flow ChartTroubleshooting Flow ChartYes control board 24 V output Yes Troubleshooting Flow ChartTroubleshoot Ends Troubleshooting Flow ChartROBERTS-GORDON will not PAY for Warranty is Void ifLimitations on Authority Representatives

NEMA 4 specifications

The Roberts Gordon NEMA 4 is a leading example of industrial heating technology, specifically designed for demanding environments. Known for its ruggedness and efficiency, it meets the needs of various industries, including manufacturing, warehousing, and food processing. The robust design ensures that it can operate efficiently in harsh conditions, making it a popular choice for facilities where moisture, dust, and other contaminants are common.

One of the standout features of the Roberts Gordon NEMA 4 is its weatherproof and dust-tight enclosure, which adheres to the NEMA 4 classification. This means that the unit can withstand water splashes and rain, making it suitable for outdoor installations or areas where water exposure is likely. The housing is constructed from durable materials that resist corrosion, ensuring longevity and reliability.

In terms of technology, the Roberts Gordon NEMA 4 utilizes advanced infrared heating, which provides direct and efficient heat transfer. This type of heating warms objects and surfaces rather than the surrounding air, allowing for faster heat-up times and enhanced energy efficiency. The units are equipped with high-output infrared emitters, which are designed to maximize radiant heat output while minimizing energy consumption.

The operational characteristics of the Roberts Gordon NEMA 4 are also noteworthy. The units are designed to be user-friendly, featuring intuitive controls that allow for easy temperature adjustments and monitoring. Furthermore, they come equipped with automatic safety features, including over-temperature protection and fail-safe shutdown mechanisms, which enhance operational safety.

Another advantage of the Roberts Gordon NEMA 4 is its versatility. It can be configured for various applications, including ceiling-mounted installations or wall-mounted setups, depending on the specific heating needs of a facility. This adaptability allows for efficient space utilization in warehouses and production areas.

The energy efficiency of the Roberts Gordon NEMA 4 translates into cost savings for businesses. By providing targeted heating where it is needed most, the units help reduce overall energy expenditures. Additionally, the longevity of the unit minimizes the frequency of replacements, contributing to long-term value.

In summary, the Roberts Gordon NEMA 4 is a highly effective industrial heating solution characterized by its robust design, advanced infrared technology, versatility, and energy efficiency. It is well-suited for challenging environments and has been embraced by industries that demand reliable and efficient heating solutions.