Roberts Gorden CoRayVac CRV-B-2 Design Manual
Custom engineered, gas-fired, low-intensity infrared heating system
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- Installation, operation & service manual (94 pages) ,
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Design Manual
All designs must be installed in strict accordance with the CORAYVAC
© 2009 Roberts-Gordon LLC
Installation, Operation and Service Manual (P/N 127102NA).
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: 716.852.4400
Fax: 716.852.0854
Toll Free: 800.828.7450
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 D 05/09
®
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Related Manuals for Roberts Gorden CoRayVac CRV-B-2
Summary of Contents for Roberts Gorden CoRayVac CRV-B-2
- Page 1 All designs must be installed in strict accordance with the CORAYVAC Installation, Operation and Service Manual (P/N 127102NA). © 2009 Roberts-Gordon LLC Custom Engineered, Gas-Fired, Low-Intensity Infrared Heating System CRV-B-2 CRV-B-4 CRV-B-6 CRV-B-8 Roberts-Gordon LLC 1250 William Street P.O. Box 44 Buffalo, New York 14240-0044 Telephone: 716.852.4400...
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Page 3: Table Of Contents
TABLE OF CONTENTS SECTION 1: Concept ... 1 SECTION 2: The CRV-Series System... 2 2.1 Safety... 2 2.2 Zero Regulator ... 2 2.3 Fuel Savings and Comfort ... 4 SECTION 3: Clearances to Combustibles... 5 3.1 Required Clearances to Combustibles... 5 SECTION 4: Sizing and Design Considerations... - 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 ...
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Page 7: Section 1: Concept
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
With CRV-Series, all equipment and controls are C.S.A. design certified, both as individual parts and also as a complete heating system. Also, individual electrical component parts are listed as applicable. 2.2 Zero Regulator CRV-Series uses a 100% pre-mix burner with the input dependent on system vacuum. -
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
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... -
Page 11: Section 3: Clearances To Combustibles
SECTION 3: CLEARANCES TO COMBUSTIBLES 3.1 Required Clearances to Combustibles Clearances are the required distances that combusti- ble objects must be away from the heater to prevent serious fire hazards. Combustibles are materials, which may catch on fire and include common items such as wood, paper, rubber, fabric, etc. -
Page 12: Figure 2: Standard Reflector
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 FIGURE 3: ONE SIDE REFLECTOR FIGURE 4: TWO SIDE REFLECTORS (inches) Model CRV-B-2 CRV-B-4 CRV-B-6 CRV-B-8 CRV-B-9 CRV-B-10 CRV-B-12... -
Page 13: Figure 5: Universal Shield, Position 1
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 5: UNIVERSAL SHIELD, POSITION 1 FIGURE 6: UNIVERSAL SHIELD, POSITION 2 FIGURE 7: UNIVERSAL SHIELD, POSITION 3 (inches) Model CRV-B-2 CRV-B-4 CRV-B-6 CRV-B-8 CRV-B-9 CRV-B-10 CRV-B-12... -
Page 14: Figure 8: 2-Foot Deco Grille
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 FIGURE 9: BARRIER SHIELD FIGURE 10: PROTECTIVE GRILLE (inches) Model CRV-B-2 CRV-B-4 CRV-B-6 CRV-B-8 CRV-B-9 CRV-B-10 CRV-B-12... -
Page 15: Section 4: Sizing And Design Considerations
SECTION 4: S IZING AND heating system. The ability of a radiant system to pro- vide the advantages of these radiant effects rests largely with the ability of this system to establish a reserve heat capacity in the floor. -
Page 16: Selecting The Burners
CRV-S ERIES ESIGN ANUAL EXAMPLE 2: Given a building with a calculated heat loss of 500,000 Btu/h, what is the installed capac- ity required of a CRV-Series system mounted at 50' (15 m)? CORAYVAC ® Installed Capacity = Heat Loss x Radiant Adjustment x Height Adjustment. -
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 number of burners to be installed in-series, in the same radiant tube, resulting in a long, continuous radi- ant emitting surface to give even heat distribution within the building. -
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 The flow unit capacity of the pump is indicated on Page 14, Table 2, as a function of installed altitude. When the CRV-Series system is designed in accor- dance with this set of instructions and is in proper operating condition, a vacuum from 2-3"... -
Page 21: Section 6: Radiant Tube And Tailpipe
SECTION 6: RADIANT TUBE AND TAILPIPE The main purpose of the tailpipe and the radiant tube is to provide sufficient tube surface to transfer the heat from the flue gases to the tube wall where it radiates from the tube. Radiant tube is defined as the tubing between burners firing in a radiant branch, plus the radiant tubing immediately following the last down- stream burner. -
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. 6.3 Design Parameters When designing branches of 4 B-8 or larger burners in-series, the following limitation to the pump capacity... -
Page 23: Table 4: Allowable Tailpipe Lengths
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'. 6. For each branch, add the length of radiant tube after each heater: Radiant Tube Length Burner... -
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 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 •...
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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: EXAMPLE CRV-SERIES SYSTEM LAYOUTS Systems that are symmetrical are preferred because the vacuum available in the system branches are bal- anced as a function of design (damper couplings are not needed). Where radiant tube lengths are variable in a single branch, the average length shall be used to determine the total radiant tube length. -
Page 28: Example System Layout (Option 2)
CRV-S ERIES ESIGN ANUAL FIGURE 19: Example System Layout (Option 2) 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. Layout will minimize up front equipment cost of tubing by implementing minimum tailpipe length. -
Page 29: Example System Layout (Option 4)
FIGURE 21: Example System Layout (Option 4) 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. All shared tailpipe is 6" diameter. Layout will exhibit nominal system efficiency. -
Page 30: Example System Layout (Option 6)
CRV-S ERIES ESIGN ANUAL Layout to provide minimum system efficiency. Adjust the lengths as necessary for different input systems and to increase the efficiency levels. 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 intensity from the tailpipe of the first system. -
Page 31: Example System Layout (Option 7, 8 And 9)
FIGURE 26: Example System Layout (Option 9) 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. Option 7 is a 180' (55 m) straight system connected to an EP-100 pump. -
Page 32: Section 8: Control Methods
CRV-S ERIES ESIGN ANUAL SECTION 8: CONTROL METHODS DANGER Electrical Shock Hazard Disconnect electric before service or maintenance. More than one disconnect switch may be required to disconnect electric to the unit. Control must be properly grounded to an electrical source. Failure to follow these instructions can result in death or electrical shock. -
Page 33: Spst Transformer Relay (P/N 90417600K)
TCP/IP (LAN): Connect to ULTRAVAC™ via your local area network of computers. Load ULTRAVAC™ software onto any computer on the network and control and view your heating system from your computer. MODEM: Dial into ULTRAVAC™ from anywhere in the world via modem. Supplied as standard on all central controllers! RS-485: Hard wire ULTRAVAC™... -
Page 34: Section 9: Air Supply System
This is true regard- less of whether the heating system is CRV-Series, other infrared systems or conventional gas or oil-fired equipment such as unit heaters, central boiler plant, etc. -
Page 35: Figure 28: Outside Air Blower
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. Use only this distance in Figure 27 (or the next longer distance if the exact distance is not shown). -
Page 36: Figure 29: Sample Layout For Pressurized Outside Air Systems
CRV-S ERIES ESIGN ANUAL FIGURE 29: Sample Layout for Pressurized Outside Air Systems... -
Page 37: Section 10: Roberts Gordon Ultravac Design Requirements
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-B-12A-110,000 (Btu/h) CRV-B-12-120,000 (Btu/h) When using ROBERTS GORDON trols, burner rates will modulate between 60% and 100% rated input (CRV-B-2 and CRV-B-4 are not avail- able for use with ROBERTS GORDON controls). 11.1.4 The design of burners supplied shall provide for maintaining a constant proportion of fuel gas to fil- tered combustion air. - Page 40 Attach this information to a wall near the ROBERTS GORDON I n f r a r e d Read the Installation, Operation, and Service Manual thoroughly before installation, operation, or service. Know your model number and installed configuration. Model number and installed configuration are found on the burner and in the Installation, Operation and Service Manual. Write the largest clearance dimensions with permanent ink according to your model number and configuration in the open spaces below.