Roberts Gorden NEMA 4 installation manual Indoor Sensor Placement, Outside Air Supply

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ROBERTS GORDON® ULTRAVAC™ CONTROLLER INSTALLATION MANUAL

3.7 Indoor Sensor Placement

The sensor measures the air temperature in the building. It is important that the sensor is located in an area within the heated zone at occupant level. For the most accurate results, sensors should be mounted on an inside wall, away from any air vents or other sources of heat and cold. In order to avoid short system cycles and inaccurate temperature readings, do not mount sensors under the first section of radiant tube (first 10' (3 m) section of tube after the burner), in direct sunlight or in the path of other sources of radiant heat. The sensors are suit- able for direct surface mounting or 4" x 2 1/8" junction box mounting.

FIGURE 8: Indoor Sensor Mounting

 

 

 

 

 

Mounting

 

 

 

 

 

Hole

 

 

 

 

 

Plug-in LCD

 

 

 

 

 

Display

 

 

 

 

 

(grasp here

 

 

 

 

 

to unplug)

 

 

 

 

 

Setback

SEN

SET

O/R

-

+

Override

Button

 

 

 

 

 

 

 

 

 

 

Setpoint

 

 

 

 

 

Adjustment

 

 

 

 

 

Slide bar

 

 

 

 

 

Mounting

 

 

 

 

 

Hole

3.7.1 Indoor Sensor Mounting

Remove the cover of the sensor by the two 1/16" allen screws, located in the lower corners of the cover. To gain access to the top mounting hole, remove the plug-in LCD display. To remove the LCD display, grasp the green plug-in board at the lower corners and gently pull the board away from the sensor back plate. See Page 14, Figure 8. After removing the plug-in LCD display from its socket, secure the sensor to the wall or junction box using the screws provided. Replace the plug-in LCD dis- play and secure the cover with the two 1/16" allen screws.

Wiring from 32 V terminals on the controller to sensor power terminals "+" and "-" is polarity sensitive. Reversing polarity may cause sensor damage. Refer to Page 16, Figure 11 and Page 18,

Figure 12 for wiring details.

3.8 Outdoor Sensor Placement

The outdoor sensor measures air temperature out- side the building. It is important that the sensor is located on the outside of the building on the north facing wall. Failure to mount the sensor on the north facing wall will result in artificially high temperature readings. If possible, locate the sensor high under an eve to prevent incorrect readings from direct sunlight and damage due to the elements.

FIGURE 9: Outdoor Sensor Placement

North

Outside

Sensor

Sensor

Module

facing down

Mount the outside sensor with the sensor module facing down to prevent accumulation of dirt or water.

3.9 Outside Air Supply

If an outside air blower is to be used, See Page 16, Figure 11 for external wiring diagrams. See Page 13, Section 3.4.1 for current load.

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Contents Installer OwnerPage Roberts-Gordon LLC Page Table of Figures Page Introduction Carton Contents Urvsc Ultravac Satellite Controller Urvccm Ultravac Central Controller with Modem Inside ViewUrvccr Ultravac Central Controller with RS-485 Converter Example Site Layout SafetyManpower Requirements Example Site Layout Specifications Controller Enclosure Relay BoardControl Electrical Variable Frequency Drive VFD Enclosure Standard ModelsNema 4 Models Variable Frequency Drive Components Factory pre-wiring shown Installation PreparationCable Requirements 3.3.1 Line Power Supply Control Wiring5 RS-485 Communication Wire Between Controllers Indoor Sensor CableVariable Frequency Drive Mounting Variable Frequency Drive RequirementsIndoor Sensor Placement Outside Air SupplyTypical External Diagrams Central Controller Communication Equalization Wiring60 Hz BMS Enable Optional120 60 Hz Pump230 460 To Satellite Controller See NoteSupply Input VFD model shown See Note For 115 V For 460 Input Input VFD VFD modelsDedicated Phone Line for Central Controller Modem CommunicationsTCP/IP communication module RS-485 Converter for Central Controller To Controller #2Set to on + Central ControllerTCP/IP Communication Module Mounting Black RS-45 Jack Module power wire Ohm resistor includedEthernet Cable To LAN Red + RJ-11 JackDirect Connect Switch Order ControllerNumber Values 1=ON, 0=OFF Order 1,2,3,4,5,6,7,8Repeater Wiring RepeaterRoberts Gordon Ultravac VFD Parameter Settings For Use WithVariable Frequency Drive Programming Parameter Factory New Number Name Default Altering VFD ParametersSetting The Corayvac End Burner Vacuum Commissioning the Corayvac SystemApproximate reading after adjusting End Vent VacuumPossible Damper Couplings’ Locations Parameter Factory New Number Name Default Setting Description Part Number Replacement PartsRoberts Gordon Ultravac Controller Replacement Parts Variable Frequency Drive Replacement Parts Variable Frequency Drive Components DiagramControl Board Power LED 4 24V Power 1 a Fuse3 10080122 Eprom Chip Variable Frequency Drive VFDVariable Frequency Drive 25 a or 10 a Fuse Chart Troubleshooting FlowFlow Chart TroubleshootingTroubleshooting Flow Chart Yes control board 24 V output YesTroubleshooting Flow Chart Troubleshoot EndsLimitations on Authority Representatives Warranty is Void ifROBERTS-GORDON will not PAY for

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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