Assessments - 3, GPA: 4.3
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For natural gas installations, check the burner rate by observing the gas meter (making sure that all other gas appliances are turned off). The test hand on the meter should be timed for at least one revolution. Note the number of seconds for one revolution. BTU/HR Cubic Feet Per Revolution Heating = X 3600 X INPUT # Seconds Per Revolution Value Adjustments - Cooling Section (HWC models) No adjustments are required or should be attempted regarding any of the components of the cooling chassis. The chassis should be checked to see that none of the wiring is loose or missing. Blower The unit contains a direct-drive, multispeed blower. The proper speeds have been preset at the factory for heating and cooling. Refer to the wiring diagram for recommended heating/cooling speeds for specific models. Direct-drive blower motors are permanently lubricated and do not require oiling. Limit Control A fixed-temperature limit control is provided which will shut off the gas to the main burners if the unit is overheated for any reason. The control must not be adjusted or relocated. High Altitude Adjustments (U.S. Installations) Ratings shown on the rating plate are for elevations up to 2000 feet. For elevations above 2000 feet, ratings should be reduced at a rate of 4% for each 1000 feet above sea level. Refer to the National Fuel Gas Code Z223.1 (latest edition) for further explanation. High Altitude Adjustments (Canadian Installations) High altitude conversions may be made by the manufacturer’s authorized representative, in accordance with the requirement of the manufacturer, provincial or territorial authorities having jurisdiction, and in accordance with the requirements of CAN/CGA B149.1 or B149.2 Installation Code. A high altitude conversion kit, available from the manufacturer and approved for this purpose, must be used (see the Accessories section beginning on page 7-15). SRM-HW/ Service Reference Manual INSTALLATION Installation and Operation in Extremely Cold Weather Areas In areas where extremely cold (below – 20°F) outdoor temperatures can be expected, some additional installation and operating precautions should be taken. The following precautions are taken to prevent possible vent system ice blockage that could result in safety shutdown of the burners: 1. Adjust to the highest achievable temperature rise within the rise and static pressure ranges specified on the rating plate. Depending on specific model, it may be possible to change to a lower heating blower speed tap to get a higher temperature rise. This also increases comfort. 2. Make sure there are no leaks of outside air into the return air system. 3. Keep the outside louver grille as free as possible of any ice that may form and obstruct the flue outlet. SRM-HW/HWC 8/99 Service Reference Manual ACCESSORIES Section 7 - Accessories HW/HWC Accessory Kit Index .............. 7-2 CA-239 Wall Sleeve Kit ................................... 7-3 A242-1 Wall Sleeve Adaptor Kit ...................... 7-7 ALVR42 Architectural Louver Facade ............. 7-10 34961A001 Vibration Isolator ...................... 7-12 ALPKT389-2 L.P. Gas Conversion Kit ............. 7-14 AHALT390-1 High Altitude Kit ....................... 7-15 ATIMR466-1 Nuisance Blower Repair Kit........ 7-17 ADAPT420-2 Chassis Conversion Kit.............. 7-18 Fenwal Triton Ignition Control Kit .................. 7-19 TL109 Burner Tray Kits ................................ 7-20 AMUFFKT494-1 Tecumseh “AW” Model Compressor Sound Reduction Kit ................... 7-21 SRM-HW/HWC 8/99 ACCESSORIES Magic-Pak: HW/HWC Accessories There are a number of accessories available to increase the performance or versatility of the Armstrong Magic-Pak HW/HWC units. This section provides a general description of each. Note: Complete instructions are packaged with each kit or its components and accessories. These instructions should be read carefully prior to installation. The instructions are intended as a general guide only, for use by qualified personnel, and do not supersede any national or local codes in any way. TABLE 7-1 HW/HWC Accessory Kit Index . . . . . CA-239 Knocked Down Wall Sleeve Kit* All HW/HWC Models A242-1 Wall Sleeve Adaptor Kit All HW/HWC Models ALVR42 Architectural Extruded Aluminum Louver Facade* All HW/HWC Models 34961A001 Compressor Vibration Isolator/Spring In Grommet Kit All HW/HWC Models ALPKT389-2 . Gas Conversion Kit**L.P 26, 38, 51, 64HW/HWC Models AHALT390-1 High Altitude Conversion Kit** 26, 38, 51, 64HW/HWC Models ATIMR466-1 Nuisance Blower Operation Repair Kit All HW/HWC Series 2 Models ADAPT420-2 Chassis Conversion Kit All HW/HWC Models 43110-001 Ignition Control Conversion Kit All HW/HWC Series 2 Models TL109A Burner Tray Assembly Kit 26HW/HWC TL109B Burner Tray Assembly Kit 38HW/HWC TL109C Burner Tray Assembly Kit 51HW/HWC TL109D Burner Tray Assembly Kit 64HW/HWC AMUFFKT494-1 Tecumseh 'AW' Model Compressor Sound Reduction Kit HWC182 * Does not apply to 121, 181, 241 and 301 (...
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