Roberts Gorden DAT90 Critical Considerations 3.1 Basic Information, Electrical Supply, Flue

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SECTION 3: CRITICAL CONSIDERATIONS

SECTION 3: CRITICAL CONSIDERATIONS 3.1 Basic Information

The CTUD heater that forms the heating section of the DualAir® unit has an automatic ignition burner and may be operated as fully modulating or ON/OFF operation.

The standard unit has the air flow from left to right when viewed from the controls side.

A special order version with the opposite air flow is available where the combustion air intake and flue will be at the front of the unit.

3.2Location and Suspension All models:

• Must be installed indoors.

• Must be installed in a level position.

May be mounted on the floor or on a shelf of non-combustible material. (See Page 5, Section 4 and Page 9, Figure 3 for support points)

May be suspended from above (See Page 9, Figure 3),on the floor, or from wall brackets of sufficient strength to support the DualAir® unit as listed in the Dimension Data Table on Page 6, Section 4.2. Drop rods must be a minimum of 12 mm diameter mild steel. Six suspension points are located on top of the DualAir® unit.

Must be installed in a manner which allows the hinged door to be fully opened to provide access to all serviceable components.

3.3 Minimum Required Installation Clearances

Clearances around the DualAir® unit and flue must be as indicated on Page 4, Figure 2, Page 10, Figure 4 through Page 12, Figure 8 to ensure access for servicing, and correct operation.

3.7 Electrical Supply

A permanent 400v 3ø 50Hz electrical supply is required at the main electrical terminals. The heater also requires suitable energy controls in accordance with Section 10.

3.8 Flue

Choose a location to allow for the proper alignment of the flue. Each DualAir® unit must be fitted with an individual and correctly sized sealed flue system (See Page 10, Section 6).

No other appliance may be connected to the flue. For room sealed installation the air intake must be the same size sealed system and the flue/air intake must terminate at an approved concentric wall or roof terminal.

3.9 Coil Condense Drain

The cooling coil must be fitted with a suitable condense drain. The condense pipe work should be in plastic or copper piping in accordance with the latest revision of applicable standards and local and national codes.

Figure 1: Condense Drain

Drain to Open Funnel 100 mm min.

Trap must be filled with water to be effective and prevent air being drawn backwards into the drip tray.

Install to Suitable Drain

3.4 Clearances to Combustibles

Clearances must be as indicated on Page 4, Figure 2. If no clearances to combustibles are indicated then installation clearances apply.

3.5 Ventilation

It is important to ensure that there is adequate air circulation around the DualAir® unit to supply air for combustion, ventilation and distribution in accordance with local and national codes.

3.6 Gas Supply

It is important that the gas supply pipe is sized correctly to provide the inlet pressure as stated on the heater data plate. The gas supply pipe and electrical connections must not support any of the heater's weight.

Failure to install the condense drain correctly may cause water carry over into the fan compartment, which may then escape and cause property damage.

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Contents DualAir Page 2005 Page Table of Figures Page Product Approval Clearances to Combustibles Corrosive ChemicalsNational Standards and Applicable Codes Critical Considerations 3.1 Basic Information Minimum Required Installation ClearancesElectrical Supply FlueInstallation Clearances and Clearances to Combustibles Front View Left Version Specifications 4.1 DAT all modelsModel 100 115 Fan Data General Technical Data Table all modelsModel 100 115 2 DAT100 and 115 4 kW motor Heater Installation 5.1 General HandlingShelf Mounting and Suspension Type B22 Appliance Flue Installation 6.1 Flue InstallationAir Intake Terminal Cover Flue ConversionControl Section & Upper Panel Vertical and Horizontal Flue Termination Type B22 Appliance Open Flued Installation Room Sealed InstallationHeaters Installed Within the Heated Space Building Ventilation14, .1 and to ensure that there is Optional Heater Configurations 8.1 Distribution DuctDepartment for recommendations regarding Duct resistance and design. Tel +44 0Connections Gas Connection with Stainless Steel Flex ConnectorRemote Control Remote Frost ThermostatSee Page 17, .3 through Page 18, Section Number See Page 20, Section DAT Wiring Diagram ModelsSite wiring connections shown DAT Site Connections at Main Circuit Board Cooling Coils/Condensers Gas Fired HeaterLouvers Electrical ChecksAutomatic Burner Control Box Sequence Commissioning the Gas Valves Combustion Testing all modelsCommissioning the Gas Valve Set Minimum PressureTurning Off the DualAir Unit Pressure SwitchComplete the Commissioning Instruction to the UserSee Page 25, Section See Page 26, SectionHeater Operation See Page 7, .3 and Page 8, FigureSimple Fault Finding all models Burner Lockout Reset ButtonSimple Fault Finding burner faults Cooling Section Operation13.3 Fan/Motor Assembly Maintenance Burner 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 Result in death or electrical shock Troubleshooting For Automatic Ignition Burner SystemsStart Troubleshooting for Flame Supervision SystemTroubleshooting for Main Fan Troubleshooting for Solenoid ValvesConduct Commissioning procedure as on Page 21, Section Troubleshooting for Fan ContactorBurner Components Gas Valve Replacement all modelsSee Page 5, Section Gas ValveBurner Injectors Burner CompartmentIgnition Electrode and Flame Probe Remove screws securing outlet flange to the flue adapter See Page 21, Section Heater Pressure SwitchPressure 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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