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Resumen del manual
Minor faults may be traced by using the troubleshooting charts on Page 31, Section 15 through Page 34, Section 15.5. NOTE 2: Check all gas pipes and pipe joints to ensure there are no cracks or gas leaks. NOTE 3: Inspect all suspended components and hardware. Insure that they are in good condition, properly tightened, and corrosion free. 13.1.1 Cooling Equipment The cooling coil does not require maintenance except that during filter replacement it is recommended to clean the surface of the coil with a soft brush and vacuum cleaner. Carry out any maintenance recommended by the condenser manufacturer. 13.1.2 Filters The air filters should be inspected regularly to ensure that no excessive build up of deposit is being experienced. If heavy deposit is being formed, then the filters may be cleaned using a vacuum cleaner. Filters should be replaced at least every four months to ensure that adequate air flow. The cooling equipment will automatically turn off should the air flow drop to a preset low value even though the fan will still run. The maximum resistance across a dirty filter should be no more than 150 Pa (1.5 mbar) and the dirty filter warning light will be on. A resistance higher than this indicates that the filters must be replaced. 13.2 Burner Maintenance 1. Open the hinged door and remove the burner compartment cover. See Page 37, Section 16.2. 2. Clean any deposits from the main burner which may have formed in the injectors or venturi of the burner. See Page 37, Section 16.2. 3. Remove the ignition electrode and flame probe. Check condition of ignition electrode and flame probe. Clean off any deposits which may have been formed, check condition of ceramic insulators. Replace as necessary. 13.3 Fan/Motor Assembly Maintenance The main fan bearings are permanently sealed and do not need lubrication. Before cleaning, turn off gas and electrical supply. Remove the fan compartment covers and use a small brush or duster to clean the fan blades from each side. Replace fan(s) when done. Figure 16: Belt Tension <4 !4 !0 Check the condition and tension of the drive belts. The condition is best inspected with the belts removed. Check for chaffing or lateral cracks. Replace belts as a matched pair as necessary. Do not over-tighten belts, as this may cause bearing damage. 13.4 Heat Exchanger Maintenance The heat exchanger will remain clean unless a problem has developed with combustion. Inspect the heat exchanger. Look for signs of overheating at the front tubes which may indicate burner over firing or persistently low air flows. SECTION 13: SERVICING 13.5 Gas Control Valve Maintenance No regular maintenance is required on these devices. To change gas control valves, See Page 36, Step 16.1 and Page 40, Section 16.5. Do not repair or disassemble on site. Replace faulty gas valves with genuine ROBERTS GORDON® replacement parts. 13.6 Flue Fan The flue fan should not require maintenance. However, If the air pressure switch is causing burner lockout then remove the flue fan from the vent box. See Page 39, Section 16.4. Ensure that the fan is free to run and that the fan wheel is clean. DUALAIR® HEATING AND COOLING UNITS INSTALLATION OPERATION AND SERVICE MANUAL SECTION 14: CONVERSION BETWEEN GASES 14.1 General Conversion between gasses will require a change of burner injectors and the gas valve re-commissioning to the new conditions. 14.2 Burner Conversion Conversion of the burner assembly from one gas to the other is the same for all types of heaters. 1. Remove the burner compartment cover as shown on Page 37, Section 16.2. 2. Remove the connection between the gas valve outlet and the manifold. See Page 36, Section 16.1 for gas valve removal. 3. Remove the manifold from the burner assembly by removing the screws at the top and bottom. See Page 37, Section 16.2.1. 4. Remove the main burner injectors. 5. Replace with the injectors for the new gas ensuring a gas tight seal. 6. Refit all components in reverse order. 14.3 Gas Valves All gas valves used on the DualAir® units have pressure regulators that may be set to operate on natural gas or LPG. Conversion is carried out by re-setting the burner pressure to the value in the data table during commissioning. See Page 7, Section 4.3. Ensure that the gas inlet pressure to the heater is correct for the new gas, and that the gas supply has been purged of the old gas. SECTION 15: TROUBLESHOOTING SECTION 15: TROUBLESHOOTING 15.1 General . . . !. ". . . . . . . $% . ' . ". " "$ H$ $ * " &04110" "!"$ H$ $ . %I2 % "$ H$ $ . % I?. %I< 1&& L ' "!% IL 4 "" % IL L 3% % < 1& % ' $ ""/9+3*/./D3 EF88,-1686500 ""$) / 9) 1 G% " " #' "$ H$ $ " "#I* " &04110< 1& % ) % J"! /%KIL : ; " % "% % "#" IL For your safety and optimum heater performance use only ROBERTS GORDON® replacement parts. Conduct Commissioning procedure as shown on Page 21, Section 11 DUALAIR® HEATIN...
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