ICP PGN324 Installation Instructions Manual

Contents

13FIRE, EXPLOSION HAZARDFailure to follow this warning could result in personalinjury, death or property damage.Do not purge gas supply into the combustion chamber.Do not use a match or other open flame to check for gasleaks.! WARNING4. Verify the following conditions:a. Make sure gas line is free of air. Before lighting theunit for the first time, perform the following with thegas valve in the OFF position:NOTE: If the gas supply pipe was not purged beforeconnecting the unit, it will be full of air. It is recommendedthat the ground joint union be loosened, and the supply linebe allowed to purge until the odor of gas is detected. Neverpurge gas lines into a combustion chamber. Immediatelyupon detection of gas odor, retighten the union. Allow 5minutes to elapse, then light unit.b. Make sure that condenser--fan blade is correctlypositioned in fan orifice. Top 1/3 of condenser--fanblade should be within fan orifice venturi.c. Ensure fan hub is positioned correctly with respectto motor housing (See Fig. 11).d. Make sure that air filter(s) is in place.e. Make sure that condensate drain trap is filled withwater to ensure proper drainage.f. Make sure that all tools and miscellaneous looseparts have been removed.FIGURE 11 Fan Blade ClearanceFAN GRILLEMOTOR1/8" MAX BETWEENMOTOR AND FAN HUB MOTOR SHAFT1/2ýSTART--UPStep 1—CHECK FOR REFRIGERANT LEAKSProceed as follows to locate and repair a refrigerant leakand to charge the unit:1. Locate leak and make sure that refrigerant systempressure has been relieved and reclaimed from bothhigh-- and low--pressure ports.2. Repair leak following accepted practices.NOTE: Install a filter drier whenever the system has beenopened for repair.3. Add a small charge of R--22 refrigerant vapor to systemand leak--test unit.4. Recover refrigerant from refrigerant system andevacuate to 500 microns if no additional leaks arefound.5. Charge unit with R--22 refrigerant, using a volumetriccharging cylinder or accurate scale. Refer to unit ratingplate for required charge. Be sure to add extrarefrigerant to compensate for internal volume of filterdrier.STEP 2—START--UP HEATING AND MAKE ADJUST-MENTSComplete the required procedures given in thePre--Start--Up section before starting the unit. Do notjumper any safety devices when operating the unit. Makesure that burner orifices are properly aligned. Unstableoperation my occur when the burner orifices in the manifoldare misaligned.Follow the lighting instructions on the heating sectionoperation label (located inside the burner or blower accessdoor) to start the heating section.NOTE: Make sure that gas supply has been purged, andthat all gas piping has been checked for leaks.FIGURE 12 Burner AssemblyMANIFOLD PIPE PLUGFIGURE 13 Monoport BurnerMANIFOLDBURNERBURNER FLAME