Roberts Gorden DAT100, DAT75, DAT90, DAT115 service manual BREAK-OFF Link Must be Removed

Page 50

DUALAIR® HEATING AND COOLING UNITS INSTALLATION OPERATION AND SERVICE MANUAL

Figure 19: Combination Fan/Limit Thermostat

WARNING

Fire Hazard

Break-off link must be removed from replacement thermostat.

Heat exchanger damage may result.

Failure to follow these instructions can result in death, injury, property damage or product damage.

Dial

Set Point 3 Limit Temp.

Set Point 2 Fan On

Set Point 1 Fan Off

Fan Terminals

Manual Fan Switch

(White)

Pull out for normal operation. Push in for continuous fan.

Push Screwdriver in and hold to release

Push in Lock

Wire to Controlled Equipment

Limit Stat

Manual Reset Button (Red)

Limit Terminals

BREAK-OFF LINK

MUST BE REMOVED

44

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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 Shelf Mounting and Suspension Heater Installation 5.1 GeneralHandling 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 Gas Valves Conversion Between Gases 14.1 GeneralBurner Conversion 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, SectionFilter Pressure Switch Pressure SwitchesCoil Pressure Switch Fan Motor Removal Ignition Control16.7.1 S4563C Fan Removal and Replacement BREAK-OFF Link Must be Removed Page Some objects can catch fire or explode when placed

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