ThermOmegaTech THERM-O-MIX STATION, Руководство по устранению неисправностей

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Section 1.0: Introduction
This manual is designed to aid qualified personnel in troubleshooting and repairing of the
Therm-O-Mix® Station. Qualified personnel assigned to troubleshoot or repair a Therm-O-Mix®
Station should read the entire manual before proceeding. If you have any questions or concerns
about the information found in this manual, please contact ThermOmegaTech® at 1-877-379-8258.
Section 1.1: Definitions and Terminology
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System = safety shower/eyewash station
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Heater = Therm-O-Mix® Station tempered water unit
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Normal Range = tepid/moderately warm/lukewarm not to exceed 100F
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Flow Pressure = gauge pressure measured during flow (dynamic pressure)
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HtEx = stainless steel brazed plate heat exchanger
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V1 = primary mixing valve; mixes cold inlet water with heated water from V5
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V2 = normally open; controls hot water temperature out of HtEx by regulating steam flow into HtEx
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V3 = normally closed; pressure sensing diaphragm valve; opens in response to pressure
differential across unit, allowing steam flow to HtEx
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V4 = normally closed; senses water temp out of mixing valve V1; V4 will open if the water
temperature is too high, short circuiting pressure differential across diaphragm, closing V3 and
turning steam flow off
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V5 = normally open; pre-mixes cold water with hot water from heat exchanger prior to mix entering
the V1 mixing valve.
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V6 = normally closed; starts to open when water temp at valve approaches 95F due to heat soak
or heat migration.
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Section 1.2: Checklist
Review the below checklist before troubleshooting.
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Does the plant have adequate Steam Flow Pressure for the selected Therm-O-Mix® Station?
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Standard Pressure Steam Heater - Requires min. 45 PSIG/max. 60 PSIG. Above 60 PSIG
requires pressure regulator. Above 75 PSIG requires pressure regulator and relief valve.
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Lower Pressure Steam (LPS) Heater - Requires min. 15 PSIG/max. 30 PSIG. Above 30 PSIG
requires pressure regulator. Above 45 PSIG requires pressure regulator and relief valve.
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Is the station’s steam supply line properly sized? (Recommended min. 1” IPS)
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Does the plant have adequate Water Flow Pressure? (min. 55 PSIG while flowing 25 GPM.)
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Is the station’s water supply line properly sized? (Recommended min. 1-1/4” IPS)
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Is the station’s supplying tepid water to anything other than the Safety Shower Station?
NOTE: Water flow from heater must be dedicated to safety shower/eyewash.
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Are freeze and scald protection valves installed correctly?
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Is the water supply line in contact with or being overheated by another source?
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Is the condensate properly sized? Is the condensate blocked?