Therma-Flow
®
PLUS
IOM 09900002
Revision C 08/15/21
© 2021, Encon Safety Products, Inc.
4-14
4 MAINTENANCE AND REPAIR
3.
Do the following continuity tests:
a. Using a cold water supply, the thermostat should close at 45°F (7.2°C) or
below.
b. Using a hot water supply, the thermostat should open at 55°F (12.7°C) or above.
To remove, test, and replace the thermostat:
1. Switch off the electrical power supply to the Therma-Flow
®
Plus.
2. Close the water supply.
3. Drain the shower by opening the eyewash valve and allow water to drain
through the bottom drain port.
4. Disconnect the thermostat wires from terminal strip. Refer to Figure 2-4 Electrical
Schematic on page 2-7).
5. Remove the conduit from the unilet by disconnecting union at unilet and
disconnecting the union from the thermostat coupling.
6. Remove the upper vertical ABS cover (see Figures 4-1 and 4-5).
7. Use a 7/8” wrench to remove the thermostat
8. Test the thermostat by doing the following:
a. Immerse the thermostat in a cold, below 45°F (7.2°C), water bath and
test for continuity. The continuity tester should show the contacts as
closed.
b. Immerse the thermostat in hot, 65 to 70°F (18.3 - 21°C), water bath and test
for continuity. The continuity tester should show the contacts as open.
9. Replace the thermostat if it fails either of the tests above. For the part number, see
section “6 Spare Parts” on page 6-1.
10. Install the thermostat in reverse order of removal.
4.9 Alarms (optional)
Local and remote alarms (if applicable) operate when the eyewash or shower is
actuated by a user. The alarms can be either or both of the following types:
•
Visual
with flashing lights
•
Audible
such as a horn, bell, or piezo annunciator
