Roberts Gorden DAT75, DAT90, DAT100, DAT115 service manual Fan Removal and Replacement

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DUALAIR® HEATING AND COOLING UNITS INSTALLATION OPERATION AND SERVICE MANUAL

16.8.1 Fan Removal and Replacement

Fan Plate
Fan Outlet Flange
Securing Screws
		Fan Mounting
		Brackets
		(re-use on new fan)
		Bracket Screws
		(re-use on new fan)
		Fan Foot
		Screws
Description	Part Number
Torin Fan DDC 270-270	A047
Torin Fan DDC 241-241	A049	Mounting Rail
		Mounting Rail

1.Remove motor leaving the pulley in place. See Page 41, Section 16.8.

2.Remove screws securing the fan outlet flange to the fan panel. (captive nuts)

3.Remove nuts and bolts securing the fan feet to the mounting brackets.

4.Slide the fan out.

(fan is heavy, may need two people)

5.Remove the fan mounting brackets from the fan. Retain components to fit to new fan.

6.Remove the Fan pulley by using a hexagonal key to remove the taper lock screws. Use one of these screws to fit into the centre jacking screw and tighten into this position to separate the taper lock bush and the pulley.

7.Refit the components above to the new fan and refit in reverse order.

8.Check belt alignment and tension.

9.Check fan rotation is correct.

16.9Combination Fan/Limit Thermostat 16.9.1 Removal and Replacement

1. Remove wires.

2. Remove the mounting screws.

3.Fit a new thermostat ensuring that the correct temperature setting and type are selected. See Page 7, Section 4.3 through Page 8, Figure 4.4.

4.Reconnect wires and test operation.

42

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Contents DualAir Page 2005 Page Table of Figures Page Product Approval Clearances to Combustibles Corrosive ChemicalsNational Standards and Applicable Codes Minimum Required Installation Clearances Critical Considerations 3.1 Basic InformationElectrical Supply FlueInstallation Clearances and Clearances to Combustibles Specifications 4.1 DAT all models Front View Left VersionGeneral Technical Data Table all models Model 100 115 Fan DataModel 100 115 2 DAT100 and 115 4 kW motor Heater Installation 5.1 General HandlingShelf Mounting and Suspension Flue Installation 6.1 Flue Installation Type B22 ApplianceAir Intake Terminal Cover Flue ConversionControl Section & Upper Panel Vertical and Horizontal Flue Termination Type B22 Appliance Room Sealed Installation Open Flued InstallationHeaters Installed Within the Heated Space Building VentilationOptional Heater Configurations 8.1 Distribution Duct 14, .1 and to ensure that there isDepartment for recommendations regarding Duct resistance and design. Tel +44 0Gas Connection with Stainless Steel Flex Connector ConnectionsRemote Control Remote Frost ThermostatSee Page 17, .3 through Page 18, Section Number DAT Wiring Diagram Models See Page 20, SectionSite wiring connections shown DAT Site Connections at Main Circuit Board Gas Fired Heater Cooling Coils/CondensersLouvers Electrical ChecksAutomatic Burner Control Box Sequence Combustion Testing all models Commissioning the Gas ValvesCommissioning the Gas Valve Set Minimum PressurePressure Switch Turning Off the DualAir UnitComplete the Commissioning Instruction to the UserSee Page 26, Section See Page 25, SectionHeater Operation See Page 7, .3 and Page 8, FigureBurner Lockout Reset Button Simple Fault Finding all modelsSimple Fault Finding burner faults Cooling Section OperationBurner Maintenance 13.3 Fan/Motor Assembly MaintenanceHeat Exchanger Maintenance Servicing 13.1 Servicing InstructionsGas Control Valve Maintenance all models 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, SectionGas Valve Replacement all models Burner ComponentsSee Page 5, Section 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 S4563C Models 75 toFan Motor Removal Fan Removal and Replacement Combination Fan/Limit Thermostat Page Page Some objects can catch fire or explode when placed

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