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Roberts Gorden
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Gas Heater
Roberts Gorden
CRV-B-4, CRV-B-8, CRV-B-6, CRV-B-2 service manual
Models:
CRV-B-4
CRV-B-2
CRV-B-6
CRV-B-8
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Specification
Maintenance
Radiant Adjustment to Heat Loss
Safety
Pressure Switch
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Contents
Custom Engineered
Design Manual
CoRayVac
Gas-Fired, Low-Intensity
Page
2009 Roberts-GordonLLC
TABLE OF CONTENTS
Page
LIST OF TABLES
TABLE OF FIGURES
Page
SECTION 1 CONCEPT
2.1 Safety
SECTION 2 THE CRV-SERIESSYSTEM
2.2 Zero Regulator
1. Radiant tubing between burners, and 20-50 6-15m downstream of the last burner is normally hot rolled steel or heat-treatedaluminized steel. All tailpipe tubing must be por- celain coated steel or heat-treatedaluminized steel
2.3 Fuel Savings and Comfort
clearances to combustibles at all times for safety
Fire Hazard
FIGURE 3 ONE SIDE REFLECTOR
FIGURE 2 STANDARD REFLECTOR
inches
centimeters
inches
FIGURE 5 UNIVERSAL SHIELD, POSITION
inches
centimeters
inches
FIGURE 8 2-FOOTDECO GRILLE
FIGURE 9 BARRIER SHIELD
FIGURE 10 PROTECTIVE GRILLE
4.1 Radiant Adjustment to Heat Loss
4.2 Radiant Height Adjustment Factor
SECTION 4 SIZING AND DESIGN CONSIDERATIONS
4.4.2 Radiant Distribution Increased Coverage
4.3 Selecting the Burners
4.4 Radiant Distribution
4.4.1 Radiant Distribution Average Coverage
FIGURE 13 Radiant Distribution Heavy Coverage
FIGURE 11 Radiant Distribution Average Coverage
5.1 Radiant Branch Flow
SECTION 5 FLOW LOADING
B-10Burner #3
FIGURE 14 Burner Flow Units
B-10Burner #1
B-10Burner #2
Tailpipe
5.2 Pump Capacity
5.3 Tailpipe Flow
FIGURE 15 Vacuum Loss Curve for 4 Shared
6.1.2 Maximum Radiant Tube Length
SECTION 6 RADIANT TUBE AND TAILPIPE
6.1 Radiant Tube Length
6.1.1 Minimum Radiant Tube Length
6.4CRV-SeriesDesign Methods
FIGURE 16 Tube Length vs. Efficiency
6.3 Design Parameters
Pump Model Series Maximum Loading
After Each Burner
System with EP-300Series Pump
EXAMPLE 3 B-10Radiant Tube vs. Tailpipe Length
6.5 Tailpipe Design Method
6.5.1 Rule of Thumb Unshared Calculations
6.5.5 Damper Couplings
FIGURE 17 Possible Damper Coupling Locations
SECTION 7 EXAMPLE CRV-SERIESSYSTEM LAYOUTS
FIGURE 18 Example System Layout Option
7.1 Example System Layout Option
7.3 Example System Layout Option
FIGURE 19 Example System Layout Option
7.2 Example System Layout Option
FIGURE 20 Example System Layout Option
7.5 Example System Layout Option
FIGURE 21 Example System Layout Option
FIGURE 22 Example System Layout Option
7.4 Example System Layout Option
FIGURE 25 Example System Layout Option
FIGURE 23 Example System Layout Option
7.6 Example System Layout Option
FIGURE 24 Example System Layout Option
7.7 Example System Layout Option 7, 8 and
FIGURE 26 Example System Layout Option
Electrical Shock Hazard
Disconnect electric before service or maintenance
Turn off gas supply to heater before service
SECTION 8 CONTROL METHODS
8.5 Pressure Switch
8.3 SPST Transformer Relay P/N 90417600K
8.4 DPST Transformer Relay P/N
9.3.2 Pressurized Systems
SECTION 9 AIR SUPPLY SYSTEM
9.1 Pressurized
9.2 Non-Pressurized
FIGURE 28 Outside Air Blower
9.3.3 Pipe sizing
Duct Design Rules
Blower P/N 90707501 Performance 112 Flow Units
Branch A
Branch B
Branch C
Page
11.2.2 Pump
SECTION 11 CRV-SERIESEQUIPMENT SPECIFICATIONS
11.1 Burner and Burner Controls
11.2Equipment 11.2.1 Burner
Page
clearance below
Maintain
clearance
the side
