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HEATER INSTALLATON CHECKLIST ITEMS - TM-5-3895-374-24-2_296
EXPANSION TANK

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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(page 3 - 931) TM 5-3895-374-24-2 FILLING HEATER WITH HEAT TRANSFER FLUID The piping to all the system to be heated should be completed using a good oil sealing pipe thread compound.  Avoid using pipe thread dope that has an oil base which will "wash out". CEI recommends Escoweld 7500 Epoxy by Exxon Chemical Co. After checking to be sure that there are no unplugged openings left in the piping, the heater and the system may be filled with heat transfer oil which meets the recommendations of our heat transfer oil specifications in Section 2. The burner should not be operated until the circulating oil system has been filled and the air worked out of the entire system. This can be determined by the fact that the circulating oil pump pressure is steady at 15 p.s.i.  or higher (that is, the pressure does not drop to nearly zero and stay there for several seconds). The heater is protected by a pump pressure switch which will shut the burner off when pump pressure drops below 10 p.s.i. Filling the heater can be done by putting the oil into the expansion tank.  The oil will enter the heater and system through the small trap between heater and expansion tank. When the oil is cold, it will flow rather slowly from the expansion tank into the heater. The circulating pump (but not the burner) may be turned on during the time that oil is being put into heater.  At first, as system is filling, circulating pump pressure may be zero or very erratic, becoming steady at 15 p.s.i. or higher after system is filled with oil and all air is worked out. Do not be alarmed if it takes a little while to fill the system to the point where the pump pressure is steady. In order to prevent overheating of the heater, it is important that the burner not be operated during the filling process. Use caution to assure that no water is introduced to the heating oil system!  Any moisture in the system will convert to steam when the temperature of the system begins to rise and can cause severe damage to equipment and injury to personnel.







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