2020 Tech Report May-June

Task # 2.a.: Performing Float Switch Testing on Vessels with Drain Valve Configurations

ACTION

COMMENT

18.

Slowly close and tag Valve “B” on the level column.

19. 20.

Open the Source Valve.

Check for ammonia odor.

If a small ammonia leak is observed, the source of the leak should be in- vestigated and the leak repaired. If a large leak occurs, abort the op- eration and contact your supervisor or facility contact. When the leak check has been satisfac- torily completed, continue as follows:

NOTE: Valve “Z” is the shut-off valve on the transfer hose. Refer to the Transfer Hose Diagram on Page 3 of this Maintenance Procedure if you have any questions.

21.

Slowly open Valve “Z.”

22.

Slowly open Valve “C.”

23.

Ammonia liquid will begin to flow from the Source Valve into the level column. Moni- tor the liquid level in the column.

Control the speed with which the liquid am- monia fills. As the level approaches the float switch level, slow the fill rate.

RETA TECHNICAL REPORT PAGE 9