2020 Tech Report May-June

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

ACTION

COMMENT

NOTE: Connection “P” is the outlet of the Valve “Y” (the purge/drain valve) on the trans- fer hose. Refer to the Transfer Hose Diagram on Page 3 of this Maintenance Procedure if you have any questions. Remove the transfer hose from the Source Valve. Reinstall the plug into the Source Valve. Reinstall the plug into Valve “C” on the level column. Observe the liquid level. If there is a level probe, verify the reading when the liquid level reaches a minimum. Consult your supervisor, facility contact, or the facility’s Ammonia Refrigeration Compliance Program for policies regarding the disposal of this barrel.

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Remove the purge hose from Connection “P” on the transfer hose.

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Remove the transfer hose from Valve “C” on the level column. Remove the transfer hose from the Source Valve. Reinstall the plug into the Source Valve. Reinstall the plug into Valve “C” on the level column. Remove the tag and slowly open Valve “B” on the level column. Reset alarms and utilize the reset to re- start the refrigeration system if required. The barrel utilized for water purging now contains a fluid with water, some ammo- nia, and oil. Typically, containers used for water purging are relocated outside of the engine room and allowed to off gas for a minimum of 24 hours.

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RETA TECHNICAL REPORT PAGE 12