Roberts Gorden CRV-B-9 service manual Damper Couplings

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SECTION 6: RADIANT TUBE AND TAILPIPE

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

•In unsymmetrical layouts with branches having the same number of flow units, the damper cou- pling is placed in every branch except for the lon- gest branch.

The purpose of the damper coupling is to adjust the end vent vacuum down to the desired level. These are to be placed in the tailpipe section and not the radiant branch. The recommended location is before the first tee fitting or 10'-40' from the end of the radiant pipe. See Page 20, Figure 17; Page 23, Figure 21, Page 24, Figure 25, and Page 25, Figure 26 for placement examples.

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Contents Design Manual Page Roberts-Gordon LLC Page Table of Figures Page Concept CRV-SERIES System SafetyZero Regulator Assembly Overview Two Branch System Shown Fuel Savings and Comfort Clearances to combustibles at all times for safety ONE Side Reflector Standard ReflectorUniversal SHIELD, Position Foot Deco Grille Radiant Height Adjustment Factor Radiant Adjustment to Heat LossSizing and Design Considerations ExampleRadiant Distribution Selecting the BurnersRadiant Distribution Average Coverage Radiant Distribution Increased Coverage= mounting height Radiant Branch Flow Flow LoadingBurner Flow Units Tailpipe Flow Pump CapacityPump Exhaust Length Requirements Radiant Tube Length Radiant Tube and TailpipeMinimum Radiant Tube Length Maximum Radiant Tube LengthPump Model Series Maximum Loading Design ParametersCRV-Series Design Methods Flow Units Per BranchAllowable Tailpipe Lengths Burner Model After Each BurnerRule of Thumb Unshared Calculations Tailpipe Design MethodSystem with EP-300 Series Pump To Calculate the Total System TailpipeDamper Couplings Possible Damper Coupling Locations Example System Layout Option Example CRV-SERIES System Layouts12 m 10 3 m 20 6 m 12 m Tailpipe 10 3 m 100 30 m Example System Layout Option 7, 8 Roberts Gordon System Control Control MethodsRoberts Gordon Ultravac Corayvac Modulating ControlsMS/TP Wiring Analog Signal Modulating ThermostatPressure Switch Spst Transformer Relay Kit P/N 90417600KPressurized AIR Supply SystemNon-Pressurized Pressurized SystemsDuct Design Rules Pipe sizingBlower P/N 90707501K Performance 112 Flow Units Sample Layout for Pressurized Outside Air Systems Roberts Gordon Ultravac Design Requirements CRV-SERIES Equipment Specifications

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CRV-B-9 specifications

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