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Roberts Gorden CoRayVac CRV-B-2 Design Manual

Custom engineered, gas-fired, low-intensity infrared heating system
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Download this manual See also: Operation & Installation Manual, Installation, Operation and Service Manual
Design Manual
All designs must be installed in strict accordance with the CORAYVAC
© 2012 Roberts-Gordon LLC
Installation, Operation and Service Manual (P/N 127102NA).
CoRayVac
Custom Engineered,
Gas-Fired, Low-Intensity
Infrared Heating System
Roberts-Gordon LLC
1250 William Street
P.O. Box 44
Buffalo, New York 14240-0044
Telephone: +1.716.852.4400
Fax: +1.716.852.0854
Toll Free: 800.828.7450
www.robertsgordon.com
www.rg-inc.com
www.radiantheaters.com
www.corayvac.com
CRV-B-2
CRV-B-9
CRV-B-4
CRV-B-10
CRV-B-6
CRV-B-12
CRV-B-8
CRV-B-12A
®
P/N 127500NA Rev E 06/12
®

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Summary of Contents for Roberts Gorden CoRayVac CRV-B-2

  • Page 1 ® CoRayVac Custom Engineered, Gas-Fired, Low-Intensity Infrared Heating System CRV-B-2 CRV-B-9 CRV-B-4 CRV-B-10 CRV-B-6 CRV-B-12 CRV-B-8 CRV-B-12A Design Manual ® All designs must be installed in strict accordance with the CORAYVAC Installation, Operation and Service Manual (P/N 127102NA). Roberts-Gordon LLC 1250 William Street P.O.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS ® ™ SECTION 1: Concept .............. 1 SECTION 10: ROBERTS GORDON ULTRAVAC Design SECTION 2: The CRV-Series System........2 Requirements..........31 2.1 Safety................2 SECTION 11: CRV-Series Equipment Specifications..32 2.2 Zero Regulator ............. 2 11.1 Burner and Burner Controls ........32 2.3 Fuel Savings and Comfort ...........
  • Page 5 TABLE OF FIGURES Figure 1: Assembly Overview (Two Branch System Shown)..3 Figure 2: Standard Reflector ............. 6 Figure 3: One Side Reflector............. 6 Figure 4: Two Side Reflectors ........... 6 Figure 5: Universal Shield, Position 1 ........7 Figure 6: Universal Shield, Position 2 ........7 Figure 7: Universal Shield, Position 3 ........

  • Page 7: Section 1: Concept

    SECTION 1: C ONCEPT SECTION 1: CONCEPT The concept of CRV-Series is easy to understand. However, it means discarding old ideas because CRV- Series is a different kind of heating system. CRV-Series is a gas-fired, vacuum-operated, low- intensity infrared heating system incorporating a pat- ented incremental burner system.

  • Page 8: Section 2: The Crv-Series System

    CRV-S ERIES ESIGN ANUAL SECTION 2: THE CRV-SERIES SYSTEM A CRV-Series system consists of one pump, a control With CRV-Series, all equipment and controls are system, and a number of burners, see Page 3, Figure C.S.A. design certified, both as individual parts and 1.

  • Page 9: Figure 1: Assembly Overview (Two Branch System Shown)

    SECTION 2: T CRV-S ERIES YSTEM FIGURE 1: Assembly Overview (Two Branch System Shown)

  • Page 10: Fuel Savings And Comfort

    CRV-S ERIES ESIGN ANUAL 2.3 Fuel Savings and Comfort Space heating can be accomplished with less input capacity when a radiant heating system is utilized, rather than with a conventional convective heating system. Why is this so? A conventional, convective heating system, such as a unit heater or central furnace works by heating the air, which then indirectly heats the area and occupants.

  • Page 11: Section 3: Clearances To Combustibles

    SECTION 3: C LEARANCES TO OMBUSTIBLES SECTION 3: CLEARANCES TO COMBUSTIBLES 3.1 Required Clearances to Combustibles • Hang heater in accordance to the minimum sus- pension requirements. Clearances are the required distances that combusti- ble objects must be away from the heater to prevent •...

  • Page 12: Figure 2: Standard Reflector

    CRV-S ERIES ESIGN ANUAL NOTE: 1. All dimensions are from the surfaces of all tubes, couplings, elbows, tees and crosses. 2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the combustion chamber and the tube connect. FIGURE 2: STANDARD REFLECTOR (inches) (centimeters)

  • Page 13: Figure 5: Universal Shield, Position 1

    SECTION 3: C LEARANCES TO OMBUSTIBLES NOTE: 1. All dimensions are from the surfaces of all tubes, couplings, elbows, tees and crosses. 2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the combustion chamber and the tube connect.

  • Page 14: Figure 8: 2-Foot Deco Grille

    CRV-S ERIES ESIGN ANUAL NOTE: 1. All dimensions are from the surfaces of all tubes, couplings, elbows, tees and crosses. 2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the combustion chamber and the tube connect. FIGURE 8: 2-FOOT DECO GRILLE (inches) (centimeters)

  • Page 15: Section 4: Sizing And Design Considerations

    SECTION 4: S IZING AND ESIGN ONSIDERATIONS SECTION 4: SIZING AND DESIGN CONSIDERATIONS The building heat loss must be calculated in accor- heating system. The ability of a radiant system to pro- dance to accepted energy load calculation methods. vide the advantages of these radiant effects rests ASHRAE (American Society of Heating, Refrigeration largely with the ability of this system to establish a and Air-Conditioning Engineers) offers in-depth infor-...

  • Page 16: Selecting The Burners

    CRV-S ERIES ESIGN ANUAL EXAMPLE 2: calculated CRV-Series system required installed capacity. Given a building with a calculated heat loss 4.4 Radiant Distribution of 500,000 Btu/h, what is the installed capac- Radiant heat distribution at occupant level must be ity required of a CRV-Series system mounted considered in the burner and design selection at 50' (15 m)? process.

  • Page 17: Figure 11: Radiant Distribution (Average Coverage)

    SECTION 4: S IZING AND ESIGN ONSIDERATIONS FIGURE 11: Radiant Distribution (Average Coverage) FIGURE 12: Radiant Distribution (Increased Coverage) FIGURE 13: Radiant Distribution (Heavy Coverage)

  • Page 18: Section 5: Flow Loading

    CRV-S ERIES ESIGN ANUAL SECTION 5: FLOW LOADING The patented CRV-Series burner system allows a burners, the burner inlet flow consists the of the total of number of burners to be installed in-series, in the the end vent air plus the combustion gases from all same radiant tube, resulting in a long, continuous radi- upstream burners.

  • Page 19: Figure 14: Burner Flow Units

    SECTION 5: F OADING FIGURE 14: Burner Flow Units...

  • Page 20: Pump Capacity

    CRV-S ERIES ESIGN ANUAL 5.2 Pump Capacity number of flow units carried in the tube. The flow unit capacity of the pump is indicated on See Figure 15. Readings for length and flow when Page 14, Table 2, as a function of installed altitude. plotted on the graph must fall on OK side to avoid When the CRV-Series system is designed in accor- excessive vacuum losses.

  • Page 21: Section 6: Radiant Tube And Tailpipe

    SECTION 6: R ADIANT UBE AND AILPIPE SECTION 6: RADIANT TUBE AND TAILPIPE The main purpose of the tailpipe and the radiant tube Page 16, Figure 16 relates the effect on system ther- is to provide sufficient tube surface to transfer the heat mal efficiency of variations in radiant and tailpipe from the flue gases to the tube wall where it radiates lengths.

  • Page 22: Design Parameters

    CRV-S ERIES ESIGN ANUAL FIGURE 16: Tube Length vs. Efficiency NOTE: Thermal efficiency values shown do not include the contribution due to condensing conditions when operating in cyclic fashion. To estimate cyclic efficiencies, add 2-3% to the values obtained from the graph. in insufficient vacuum to burners.

  • Page 23: Table 4: Allowable Tailpipe Lengths

    SECTION 6: R ADIANT UBE AND AILPIPE 4. Select pump model series for total system flow units: EP-100: up to 66 flow units EP-200: up to 110 flow units EP-300: up to 224 flow units 5. See Page 14, Table 2 for altitudes greater than 2000'.

  • Page 24: Tailpipe Design Method

    CRV-S ERIES ESIGN ANUAL EXAMPLE 3: B-10 Radiant Tube vs. Tailpipe Length For a B-10 burner system of 200 flow units and an average of 40' radiant tube length per burner, See Page 17 , Table 4 for the tailpipe lengths per flow unit that can be used and the corresponding operating characteristic.
  • Page 25 SECTION 6: R ADIANT UBE AND AILPIPE Table 5 for the burner model to ensure that the result- ing tailpipe lengths maintain intended operating char- acteristic. 6.5.5 Damper Couplings Damper couplings are needed: • In any tailpipe branch that carries less flow units than other tailpipe branches connected to the same pump •...

  • Page 26: Figure 17: Possible Damper Coupling Locations

    CRV-S ERIES ESIGN ANUAL FIGURE 17: Possible Damper Coupling Locations...

  • Page 27: Section 7: Example Crv-Series System Layouts

    SECTION 7: E CRV-S XAMPLE ERIES YSTEM AYOUTS SECTION 7: EXAMPLE CRV-SERIES SYSTEM LAYOUTS Systems that are symmetrical are preferred because FIGURE 18: Example System Layout (Option 1) the vacuum available in the system branches are bal- anced as a function of design (damper couplings are not needed).

  • Page 28: Example System Layout (Option 2)

    CRV-S ERIES ESIGN ANUAL FIGURE 19: Example System Layout (Option 2) FIGURE 20: Example System Layout (Option 3) 7.2 Example System Layout (Option 2) Six B10 burners at recommended radiant tube length and 1.2'/flow unit tailpipe, the recommended pump for this system is an EP-200 Series pump.

  • Page 29: Example System Layout (Option 4)

    SECTION 7: E CRV-S XAMPLE ERIES YSTEM AYOUTS FIGURE 21: Example System Layout (Option 4) FIGURE 22: Example System Layout (Option 5) 7.4 Example System Layout (Option 4) Nine B10 burners at recommended radiant tube length and 1.58'/flow unit tailpipe, the pump for this system is an EP-300 Series Pump.

  • Page 30: Example System Layout (Option 6)

    CRV-S ERIES ESIGN ANUAL Layout to provide minimum system efficiency. Adjust This layout method is often used effectively in heatloss the lengths as necessary for different input systems and perimeter heating applications. and to increase the efficiency levels. FIGURE 24: Example System Layout (Option 7) This system is generally accompanied by an addi- tional system, as shown, so that the radiant output of the additional system supplements the lack of radiant...

  • Page 31: Example System Layout (Option 7, 8 And 9)

    SECTION 7: E CRV-S XAMPLE ERIES YSTEM AYOUTS FIGURE 26: Example System Layout (Option 9) Layout to provide condensed radiant output and good uniformity of distribution. Layout will exhibit minimum system efficiency. 7.7 Example System Layout (Option 7, 8 and 9) These systems are for B9 burners only, this burner is specially rated for 2 burners in-series applications in the systems shown.

  • Page 32: Section 8: Control Methods

    CRV-S ERIES ESIGN ANUAL SECTION 8: CONTROL METHODS zones and indicates the status of the pressure switch with lights. DANGER The System Control is ETL listed in accordance with UL873 – Standard for Temperature Indicating and Regulating Equipment. 8.2 ROBERTS GORDON ®...

  • Page 33: Spst Transformer Relay Kit (P/N 90417600K)

    SECTION 8: C ONTROL ETHODS CORAYVAC Modulating system. The system will supply an analog output (0-10VDC) signal control to ® modulate based on the temperature sensed at the dictate the speed of the pump. modulating thermostat, not outdoor temperature. The This thermostat is a flexible, wall-mounted stand- modulating controls offer many features like 7 day alone control with combined controller/sensor.

  • Page 34: Section 9: Air Supply System

    CRV-S ERIES ESIGN ANUAL SECTION 9: AIR SUPPLY SYSTEM An air supply free of dust and corrosive contaminants ULTRAVAC or relay transformer, a separate ® ™ is essential for proper operation and best life expec- load relay package is required. Wire the control for the tancy with any heating system.

  • Page 35: Figure 28: Outside Air Blower

    SECTION 9: A UPPLY YSTEM 9.3.3 Pipe sizing To size each section of pipe proceed as follows: • Calculate the required flow units at each outlet of the supply system. • Measure the longest run of pipe from the blower to the most remote outlet.

  • Page 36: Figure 29: Sample Layout For Pressurized Outside Air

    CRV-S ERIES ESIGN ANUAL FIGURE 29: Sample Layout for Pressurized Outside Air Systems...

  • Page 37: Requirements

    SECTION 10: ROBERTS GORDON ULTRAVAC ® ™ ESIGN EQUIREMENTS SECTION 10: ROBERTS GORDON ULTRAVAC DESIGN REQUIREMENTS ® ™ CRV-B-2 and CRV-B-4 are not available for use with ROBERTS GORDON ULTRAVAC controls. ® ™ CRV-Series systems designed with minimum radiant tube lengthshall have 1.5' - 2.0' per flow unit of tailpipe length.

  • Page 38: Section 11: Crv-Series Equipment Specifications

    CRV-S ERIES ESIGN ANUAL SECTION 11: CRV-SERIES EQUIPMENT SPECIFICATIONS The total heating system supplied shall be design cer- 11.2 Equipment tified by the CSA International per American National 11.2.1 Burner Standard ANSI Z83.20/CSA 2.34 (latest edition). Each burner assembly shall consist of heavy-duty 11.1 Burner and Burner Controls cast-iron burner heads, pre-wired gas controls with 11.1.1 Burners shall be designed to operate simulta-...

This manual is also suitable for:

Corayvac crv-b-4Corayvac crv-b-6Corayvac crv-b-9Corayvac crv-b-10Corayvac crv-b-8Corayvac crv-b-12 ... Show all

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