Appendix E: Replacing The Backup Battery - Phonetics Skymetry WTU-14 User Manual

APPENDIX E: Replacing the Backup Battery

The back-up battery will provide about 4–5 years of service life
depending on usage and temperature. After 5 years (or when backup
time is insufficient) the battery should be replaced. Replacement
batteries can be ordered from Phonetics. To replace the battery, fol-
low the instructions below:
1. Disconnect the red battery wire and cover the bare wire with
insulating electrical tape.
2. Disconnect the black battery wire and cover the bare wire with
insulating electrical tape.
3. Unplug the power transformer.
4. Loosen the compression wiring connectors and allow 6-10" of
cable slack to come into the enclosure. This will make it easier
to turn the panel over.
5. Remove the four screws securing the Skymetry housing to the
back panel and carefully remove the Skymetry WTU-14.
6. Remove the connectors from the battery by carefully pulling
and wiggling the connectors from the battery tabs.
7. Remove the screws holding the battery bracket and remove the
bracket.
8. Dispose of/recycle the old battery following local recycling
regulations for lead batteries.
9. Insert the new replacement battery into the slot and replace the
bracket. Secure the bracket with the two screws.
10. Attach the battery connector at the end of the BLACK wire to
the -(negative) terminal of the new battery.
11. Attach the battery connector at the end of the RED wire to the
+(positive) terminal of the new battery.
(NEMA-4 enclosure models only)
Appendix E: Replacing the Backup Battery
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