Chapter 7—AUXILIARY MACHINERYWARNING: Protective clothing shall be worn while pouring concentrated chemicals into chemicalinjection tank and while topping off.GENERAL PROCEDURE FOR ADDING CHEMICAL (ASSUMING VALVES SET FOR NORMALOPERATION, i.e., VALVES 1,2,3 OPEN AND VALVES 4,5,6,7,8 CLOSED).1. Slowly open valves 7 (drain), 6 (overflow/vent), and then 5 (funnel fill).2. Close valve 7.3. Charge the injection tank with treatment chemicals already in solution throughthe funnel.4. Top off tank with feedwater obtained in bucket until an overflow just starts.5. Close valves 5 and 6.6. Open valves 4 and 8.7. Close valve 1.8. Maintain a flow of water for 10 minutes to wash out the injection tank.INJECTION TANK SECURING PROCEDURE1. Open valve 1.2. Close valves 4 and 8.3. Drain injection tank by first slowly opening valve 7 and then valve 6.4. Close valves 6 and 7.121.54Figure 7-3.—Auxiliary Boiler Chemical Injection Procedure.7-11
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