2020 Tech Report Jan-Feb

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

ACTION

COMMENT

6.

Remove lock and tag and slowly open Valve “A” to introduce pressure to the control group which is isolated. Check for ammonia odor. If a small ammonia leak is observed, the source of the leak should be inves- tigated and the leak repaired. If a large leak occurs, secure the area to prevent unauthorized personnel from entering; notify safety personnel; close, apply lock and tag to Valve “A” then pumpout the valve group. See Task # 2.b. of this Maintenance Pro- cedure. Change the following automatic valve’s manual operating stem to the “AUTO- MATIC” operating position. Valve “B” Regulator Remove lock and tag and slowly open Valve “D.” 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.)

7.

See Task # 2.b. of this Maintenance Proce- dure.

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!

8.

9.

10.

11. 12.

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.

13.

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

RETA TECHNICAL REPORT PAGE 22