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Troubleshooting a Therm-O-Mix Station in the field may require turning off the hot and cold
water supply to the emergency safety shower/eyewash system. As such, please contact the
plant safety manager/supervisor and follow proper procedures for tagging, locking out, and other
possible issues relating to servicing and temporarily rendering the safety equipment unusable.
Notify all personnel working in the area that the emergency safety shower/eyewash equipment
will be temporarily disabled.
Follow the steps listed below to properly decommission the Therm-O-Mix Station for
troubleshooting and repairs:
1.
Close the hot water supply line valve to the station.
2.
Activate the shower and eyewash system for a minimum of two minutes to deplete the hot
water pressure trapped between the supply shutoff valve and the station. A longer period of
time may be needed, depending on the size and length of supply piping.
3.
With the system activated close the cold water supply valve to the station.
4.
See Section 4.0, for individual valve adjustment and/or replacement.
5.
Once Therm-O-Mix has been repaired, open the hot and cold water supply valves to the
station. Allow station to run for at least one minute to purge the system.
6. Insert the temperature-reading device into the eyewash nozzle. Activate the eyewash and
record the temperature several times over a 5-10 minute cycle. Repeat this step for the
shower, attaching the temperature-reading device to the shower head. Record temperatures
on the Unit Checklist (see Appendix# 4).
CAUTION: THERM-O-MIX PIPING MAY BE HOT AND CARE SHOULD BE TAKEN
DURING REPAIRS. BE CAREFUL WHEN REMOVING PARTS FOR REPAIR OR
REPLACEMENT; HOT WATER MAY BE TRAPPED IN THE STATION.
Section 3.1: Trouble Shooting/Repair Warning Statement
Section 3.2: Decommissioning the Therm-O-Mix Station For Troubleshooting
and Repairs
Section 3.0: Trouble Shooting and Repairs
