Therma-Flow
®
PLUS
IOM 09900002 Revision C 08/15/21
© 2021, Encon Safety Products, Inc.
2. Close the water supply.
3. Relieve pressure and water from the system by opening the eyewash or shower.
4. Carefully remove the locking-ring that holds the scald protection valve and
remove the unit.
5. Place the valve in hot, 100°F (37.8°C), water for 15 to 20 minutes. The scald
protection valve should be fully open at the end of this period. If it is not fully
open, replace the defective valve.
6. If the valve opens, remove it from the hot water and clean it by forcing compressed
air 40 PSI (278 kPa) - 50 PSI (345 kPa) through the inlet side of the valve for two
(2) to three (3) minutes (see the nameplate for flow direction).
7. Place the scald protection valve in cold water 40°F (4.4°C) - 50°F (10°C) for 10 to
15 minutes.
8. Remove the valve from the cold water and force compressed air 100 PSI (689
kPa) through the inlet of the valve. No passage of air ensures the valve seat is
closed and the valve is functioning properly.
9. With air connected to the valve, submerge the valve in a cold water bath to check
for leakage. If bubbles appear repeat the cleaning process Steps 6 through 8 and
retest the valve in the water bath.
10. If the valve leaks after being cleaned two (2) times, replace the valve in reverse
order of removal.
11. Open the water supply.
12. Switch on the electrical power supply to Therma-Flow
®
Plus.
4.7 Heat Trace Cable (if applicable)
The heat trace cable keeps the pipes warm in the Therma-Flow
®
Plus system to
prevent the water from freezing. The energized heat trace cable keeps the water
temperature between 55°F (12.7°C) and 65°F (18.3°C). When the internal water
temperature falls below 45°F (7.2°C), the thermostat closes the circuit to apply power
to the heat trace cable. For more information, see “4.8 Heat Trace Cable Thermostat”
on page 4-13.
The optional Heat Trace Indicator Bulb (amber light) on the junction box indicates
power is being supplied to the heat trace cable.
When ‘trouble shooting’, to check the heat trace cable for operation, touch the heat
trace cable to ensure it is emitting heat. Some covers and insulation may have to be
removed for this effort. It should be warm when the controlling thermostat is below 45°F
(7.2°C) and may stay on until 65°F (18.3°C) is achieved.
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