Roberts Gorden NEMA 4 Troubleshooting Flow Chart, Yes control board 24 V output Yes

Page 45

 

 

 

 

 

Contact your

 

 

 

 

 

 

 

ROBERTS GORDON®

 

 

 

 

 

 

 

Independent Distributor.

 

 

 

Yes

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

Are pump and/or burners

 

 

Are shield wires from RS-485

 

 

 

Yes

communication wiring and

Verify wiring between

 

turning on and off erratically?

VFD 0-10 V signal wiring

 

controller and burner.

 

 

 

 

 

correctly twisted and/or

 

 

 

 

 

 

 

Yes

No

 

 

 

grounded?

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

After 45 seconds pre-purge

 

On the relay board, is the

Is there power at the

 

No

 

appropriate zone relay Yes

Yes

period, do the burners light?

 

burner recepticle?

 

 

 

(#1-3) LED lit?

 

 

 

 

 

 

 

 

Replace plug-in relay. See

Replacement Parts section.

Correct gas problem. See

gas piping section of

CORAYVAC® IOS manual

(P/N 127102NA)

No

Yes Is there proper gas pressure and flow to the burners?

Yes

Troubleshooting Flow Chart (continued)

No

Is there continuity across meter input #4 (pressure switch input) on the control board?

No

 

Yes

Is there 24 Vac across the

Is there 24 Vac across the

Yes control board 24 V output Yes

relay board's appropriate 24

(#1-3) for that zone?

V output connection (#1-3)?

No

No

Unplug burner, wait 10

 

Check for proper vacuum

seconds, then plug it in again.

 

Yes

at end vent. See

Does the ignition module

Commissioning of the

 

begin ignition

 

CRV System for details.

sequence by sparking?

 

 

No

 

 

Yes

Verify pressure switch wiring

and operation. Replace

pressure switch if necessary.

Contact your

 

Secure wiring between 24 V

ROBERTS GORDON

®

output on the control board

Independent Distributor.

and output connection on

the relay board.

 

Adjust system for proper

 

Pre-purge. Wait 45 seconds.

Do the burners light?

Check LED on module and refer to LED codes below.

No

Yes

Troubleshoot Ends

Do all the burners

No

Is the end vent vacuum

ignite smoothly?

setting too high?

 

Yes

 

No

 

 

 

 

Wrong end vent plate may

 

 

be installed. Make sure

 

 

plate and burner match.

Yes

vacuum at the end vent.

See Commissioning of the

 

 

CRV System for details.

Is there 24 V at the burner

transformer secondary (blue and yellow wires)?

No

Replace burner transformer.

Yes Replace ignition module.

 

 

Ignition Module Diagnostic Codes:

 

LED

Problem

Solution

 

4 second steady

 

 

 

flash at start of cycle

Normal

Wait for valve to open

Yes

Steady on

Microprocessor failure

Replace module

 

 

within module

 

 

Three flashes

Ignition lockout

Recycle unit: check for

 

 

Lockout of module

spark and valve opening and

 

 

after 3 tries

replace:if none, replace module

 

 

 

 

39

SECTION 9: TROUBLESHOOTING

Page 44 Page 46
Image 45
Page 44 Page 46
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 Safety Manpower RequirementsExample Site Layout Example Site Layout Specifications Relay Board ControlController Enclosure Variable Frequency Drive VFD Enclosure Standard Models Nema 4 ModelsElectrical Variable Frequency Drive Components Factory pre-wiring shown Preparation InstallationControl Wiring Cable Requirements 3.3.1 Line Power Supply5 RS-485 Communication Wire Between Controllers Indoor Sensor CableVariable Frequency Drive Requirements Variable Frequency Drive MountingOutside Air Supply Indoor Sensor PlacementCentral Controller Communication Equalization Wiring Typical External DiagramsBMS Enable Optional 12060 Hz Pump 230 46060 Hz See Note To Satellite ControllerFor 115 V For 460 Input Input VFD VFD models Supply Input VFD model shown See NoteCommunications TCP/IP communication moduleDedicated Phone Line for Central Controller Modem To Controller #2 RS-485 Converter for Central ControllerSet to on + Central ControllerTCP/IP Communication Module Mounting Ohm resistor included Black RS-45 Jack Module power wireEthernet Cable To LAN Red + RJ-11 JackDirect Connect Controller Switch OrderNumber Values 1=ON, 0=OFF Order 1,2,3,4,5,6,7,8Repeater Repeater WiringVFD Parameter Settings For Use With Variable Frequency Drive ProgrammingRoberts 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 Replacement Parts Roberts Gordon Ultravac Controller Replacement PartsDescription Part Number Variable Frequency Drive Components Diagram Variable Frequency Drive Replacement Parts4 24V Power 1 a Fuse Control Board Power LED3 10080122 Eprom Chip Variable Frequency Drive VFDVariable 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 ChartWarranty is Void if ROBERTS-GORDON will not PAY forLimitations 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.
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