2020 Tech Report Jan-Feb

Task # 3.a.: Returning a Configuration “A” Control Group to Normal Operation

ACTION

COMMENT

CAUTION: Do not stop the procedure at this point. This can create a hydrostatic lock which can result in ruptured piping and a release of ammonia! If the control valve configuration is as shown in Figure #2, the correct position of Valve “D” was noted in the Master Maintenance Log (or facility equivalent) or on your work order dur- ing the shutdown procedure. If you have any questions, consult your supervisor or facility contact. NOTE: Log entries must contain the name of the person making the entry, as well as the time, date, and pertinent details. Be Specific! If there is not an established Master Mainte- nance Log (or facility equivalent), log the infor- mation on your work order. See Task # 4 of this Maintenance Procedure.

8.

Change the following automatic valve’s manual operating stem to the “AUTO- MATIC” operating position. Valve “B” Solenoid Remove lock and tag and slowly open Valve “D.” If the control valve configura- tion is as shown on Figure #2, ensure Valve “D” is throttled open to the correct position. Remove PPE, clean, perform any re- quired preventive maintenance and stow. Secure all tools and equipment utilized. Log “Control group ______ ( insert the appropriate valve number ) has been re- turned to normal operation” in the Mainte- nance Log (or facility equivalent.)

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Continue to Task # 4 “Concluding Refrig- eration System Strainer Cleaning.”

RETA TECHNICAL REPORT PAGE 20