4 MAINTENANCE AND REPAIR
4.1 Scheduling Maintenance
It is recommended that you flush the unit at least once a week by running the
eyewash and shower. It is also recommended that you routinely complete the
checklist items in the “3.5 Therma-Flow
®
Plus Inspection Report” on page 3-4.
Also, at least once a year, the freeze and scald protection valves (if applicable)
should be removed and tested by cycling water through them. For complete
instructions on this procedure, see “4.6 Freeze and Scald Protection Valves” on
page 4-9.
4.2 Removing and Replacing ABS Covers to Access Components
(if applicable)
If a Therma-Flow
®
shower is present, the internal components are under ABS
plastic covers that help to freeze protect the system (see Figure 4-1 on page
4-2). The ABS covers are divided into segments so that you can easily remove
them to access the components for repairs.
The covers are held together by closure strips compressed at the flange area of
the cover. The closure strips are adjustable and can be opened using a blade
screw- driver and reinstalled by using pliers to compress them. The compo-nents
that pass through the removable covers are sealed with synthetic rubber seals
(grommets) that keep out water, gases, and moving air (a very important feature to
maintain freeze protection).
To remove the ABS covers:
1. Pull the neoprene (black) closure strips away from the flanged edge of the
covers.
2. Separate the covers at the segment line (gasket sealed at time of manufacture)
and remove them.
3. All items protruding through the covers, such as the eyewash yoke and push
plate(s), must be physically removed from the shower unit prior to cover
removal. For more information, see “4.4 Dismantling and Reassembling the
Eyewash and Drench Hose” on page 4-3.
Inspect the covers to ensure nothing is missing or broken and replace as required.
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