Roberts Gorden NEMA 4 Variable Frequency Drive Mounting, Variable Frequency Drive Requirements

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SECTION 3: INSTALLATION

3.4Electrical Installation Requirements

DANGER

Electrical Shock Hazard

Disconnect electrical before servicing.

This appliance must be connected to a properly grounded electrical source.

Replace cover before operating.

Failure to follow these instructions can result in death or electrical shock.

3.4.1The enclosure must be supplied from a local fused isolator rated for a total amperage not exceeding 25 A.

The method for calculating the current loading is as follows:

CORAYVAC® Burner

0.3 A/burner

Multiply the current for the individual burners above by the number of burners supplied from the enclosure to give the total current required.

The full load amps for the optional outside air blower

(P/N 90707500) are:

1.6 A

The total added current load for each individual relay must not exceed 3 A.

The total added current load for all 8 relays must not exceed 25 A.

3.5 Pump Requirements

The pump is powered directly from the Variable Frequency Drive (VFD). The VFD will be energized via an output from the relay board switched through a designated relay.

The 0-10 V signal from the ULTRAVAC™ controller enclosure wired into VFD input relays 5 and 2 (see Page 16, Figure 11 through Page 18, Figure 12) will dictate the speed of the pump. The VFD output sup- ply to the pump is 230 V 3 Ø 0-60 Hz for 115 V and 230 V models and is 460 V, 3 Ø, 0-60 Hz for 460 V models. The frequency of the output supply signal to the pump will be varied based on the 0-10 V signal from the control

enclosure. See Page 11, Section 3.2 for additional installation requirements.

FIGURE 7: Variable Frequency Drive Mounting

(Standard enclosures only, NEMA 4 enclosure mounting varies by model)

14.75" (37.5 cm)

10" (25.4 cm)

3.6 Variable Frequency Drive Requirements

The VFD must be powered separately from the con- trol enclosure. The 230 V drive power supply must be 230 V, 50-60 Hz, 1 Ø. The 120V drive power supply must be 120 V, 50-60 Hz, 1 Ø. The 460 drive power supply must be 460 V, 50-60 Hz, 3 Ø. See Page 9, Section 2.3 for additional details. The VFD on/off switching is done by an output on the relay board.

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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.
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