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Propane Conversion Kit Condensing gas boiler Instruction Required Input Rates GB142-24 GB142-30 GB142-45 GB142-60 84,800 btu/hr 106,000 btu/hr 160,900 btu/hr 214,800 btu/hr This kit and instructions are for converting the GB142 model boilers from Natural Gas to Liquid Propane. WARNING!
Contents Contents Safety considerations Application purpose Hazard definitions Observe the following symbols Parts list for converting the boiler to propane LP conversion Testing for gas leaks Inlet gas pressure Checking and adjusting the gas/air ratio Carrying out a tightness test in operating conditions Measuring the carbon monoxide content (CO)
Safety considerations Safety considerations Contents Observe the following symbols For use in Canada the conversion kit shall be carried out in accordance with the requirements of the provin- cial authorities having jurisdiction and in accordance DANGER with the requirements of the CAN-B149.1 and CAN1-B149.2 Installation Code.
Parts list for converting the boiler to propane Parts list for converting the boiler to propane Conversion kit propane for the 24/30 kW # 76687 includes: – orifice # 7099016 (dia. 3.35 mm / 0.131 inch) – 2 o-rings – bag –...
LP conversion LP conversion To convert the boiler to propane, the following instruc- tions must be adhered to: DANGER if flammable gas explodes. Only carry out work on gas conduits and fit- tings if you are licensed for such work. This appliance is NOT suitable for use with gas mixtures such as Butane/Propane Shut down the boiler...
LP conversion Loosen the three Phillips screws (fig. 4, pos. 1) and remove the gas valve from the fan unit. Remove the gas orifice (fig. 4, pos. 2). Fit the correct orifice for the new type of gas supply (table 1). Make sure not to damage the O-rings. Re-assemble all parts in reverse order of disassem- bly.
LP conversion Inlet gas pressure Open at least one thermostatic radiator valve if present to allow water to flow through the boiler. Do not switch on the boiler. Close the gas shut-off valve. Loosen the screw plug on the inlet gas pressure testing nipple by two turns (fig.
LP conversion Press the "Chimney Sweep" button to end the measurement procedure. Close the gas shut-off valve. Remove the connection hose again and tighten the screw plug on the testing nipple. Open the gas shut-off valve again. CAUTION – Contact the relevant gas utility company if the required inlet gas pressure is not available.
LP conversion Read out the differential pressure. The differential pressure (p – p ) must be -0.02 inch W.C. (- 5 Pa) (±0.02 inch W.C. = ± 5 Pa) (read-out on pressure gauge: -0.04 – 0 inch W.C. = -10 – 0 Pa). Enter the value measured in the start-up report.
LP conversion Measuring the carbon monoxide content (CO) Measure the carbon monoxide content on the flue gas sampling point (fig. 9). The CO values in an air-free condition must be below 400 ppm or 0.04 vol. %. Values of 400 ppm and up indi- cate that the burner adjustment may be wrong, the gas burner fitting or the heat exchanger are dirty or that there may be burner faults.
Operating Instructions Operating Instructions Start up the boiler STOP! Read the safety precautions on page 10 of this manual. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! Follow "B" in the safety information on page 10.
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Bosch Thermotechnology Corporation 50 Wentworth Avenue Londonderry, NH 03053 Tel.: 603-552-1100 Fax: 603-584-1681 www.buderus.net Products manufactured by: Bosch Thermotechnik GmbH Sophienstrasse 30-32 D-35576 Wetzlar www.buderus.de info@buderus.de Bosch Thermotechnology Corporation reserves the right to make changes without notice due to continuing engineering...
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