Roberts Gorden DAT100, DAT75, DAT90 Removal and Replacement Parts, Burner Components, Gas Valve

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DUALAIR® HEATING AND COOLING UNITS INSTALLATION OPERATION AND SERVICE MANUAL

SECTION 16: REMOVAL AND REPLACEMENT PARTS

See warnings and notes on Page 28, Section 13 before removing or replacing parts.

Burner Components

All serviceable burner parts are accessed by the door on the side of the heater.

See Page 5, Section 4.

16.1 Gas Valve

The VR4605 gas valve is fitted with the V7335A Modureg regulator (P/N L512) supplied as a separate component.

Figure 17: Standard Regulator Removal

Sealing

Washer

Remove Standard

Regulator

When replacing the gas valve, the Modureg will

Fit the Modureg ensuring that the rubber seal is in

need to be fitted on site. To fit the Modureg, remove

place and the two screws are tight. See Page 36,

the standard regulator by removing the two screws

Section 16.1.1. Once fitted follow commissioning

retaining the rubber sealing washer. See Page 36,

procedure in Section 11.

Figure 17

 

16.1.1 Gas Valve Replacement - (all models)

Rubber

Seal

 

Modureg Modulating

 

Regulator

Description

Part Number

Gas Valve VR4605

90033404

Ignition Control

90434020

Step 2

Unscrew valve from the

burner manifold

or

unscrew the screws for

the inlet and outlet flanges.

Step 1

Unscrew gas pipe from the valve inlet.

Ignition

Control

16.1.2 Gas Valve Replacement continued- (all models)

Replace in reverse order. Verify that the gas flow direction of the valve is correct. Re-use the "O" ring seal in the outlet flange where fitted. Check that all the joints are leak free. Reset gas valve.

See Page 23, Section 11.4.2.

IT IS IMPORTANT THAT ONLY THE CORRECT GAS VALVES SPECIFIED FOR EACH MODEL TYPE ARE USED WHEN REPLACING THESE CONTROLS.

36

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Contents DualAir Page Roberts-Gordon, LLC Page Table of Figures Page Product Approval Clearances to Combustibles Heater SafetyInstaller Responsibility Corrosive ChemicalsLocation and Suspension All models Minimum Required Installation ClearancesCritical Considerations 3.1 Basic Information VentilationInstallation Clearances and Clearances to Combustibles Specifications 4.1 DAT Front View Left VersionGeneral Technical Data Table Model 100 115 Fan DataModel 100 115 2 DAT100 and 115 4 kW motor Heater Installation 5.1 General HandlingShelf Mounting and Suspension Air Intake Terminal Cover Flue Installation 6.1 Flue InstallationType B22 Appliance Flue ConversionControl Section & Upper Panel Vertical and Horizontal Flue Termination Type B22 Appliance AIR Supply Room Sealed InstallationOpen Flued Installation Building VentilationDuct resistance and design. Tel +44 0 121 Optional Heater Configurations 8.1 Distribution DuctDepartment for recommendations regarding 7700GAS Piping ConnectionsSee Page 17, .3 through Page 18, Section Wiring and Electrical InformationRemote Control ModelsNumber DAT Wiring Diagram See Page 20, SectionSite wiring connections shown DAT Site Connections at Main Circuit Board Commissioning Automatic Burner Control Box Sequence Commissioning the Gas Valve Combustion TestingCommissioning the Gas Valves Set Minimum PressureComplete the Commissioning Pressure SwitchTurning Off the DualAir Unit Instruction to the UserSee Page 7, .3 and Page 8, Figure Heater OperationCommon User Controls Combination Fan/Limit Thermostat Secondary Limit ThermostatSimple Fault Finding burner faults Burner Lockout Reset ButtonSimple Fault Finding Cooling Section OperationIf you smell gas Heat Exchanger Maintenance Burner Maintenance13.3 Fan/Motor Assembly Maintenance Servicing 13.1 Servicing InstructionsGas Control Valve Maintenance Conversion Between Gases 14.1 General Burner ConversionGas Valves Conduct Commissioning procedure as shown on Page 21, Section Troubleshooting For Automatic Ignition Burner Systems Result in death or electrical shockTroubleshooting for Flame Supervision System StartTroubleshooting for Solenoid Valves Troubleshooting for Main FanTroubleshooting for Fan Contactor Conduct Commissioning procedure as on Page 21, SectionBurner Components Removal and Replacement PartsGas Valve Replacement all models Gas ValveBurner Compartment Burner InjectorsIgnition Electrode and Flame Probe Remove screws securing outlet flange to the flue adapter Heater Pressure Switch See Page 21, SectionPressure Switches Coil Pressure SwitchFilter Pressure Switch Ignition Control 16.7.1 S4563CFan Motor Removal Fan Removal and Replacement BREAK-OFF Link Must be Removed Page Some objects can catch fire or explode when placed
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