Chamberlain HDSW24UL Installation Manual page 21

33AH Batteries
The batteries are charged in the circuit by the integrated transformer. The
33AH application requires battery harness K41-0102-000 (not provided)
and 33AH battery tray K41-0105-000 (not provided), see Accessories.
1. Turn the AC power switch to OFF.
2. Turn the battery switch OFF.
3. Connect a jumper between the positive(+) terminal of the battery to
the negative terminal(-) of the other battery.
4. Replace the existing battery tray with 33AH battery tray. Place the
batteries in the tray.
5. Connect the (+) terminal of the battery to the red battery wire from
the operator using the RED harness kit wire .
6. Connect the (-) terminal of the battery to the black battery wire from
the operator using the BLACK harness kit wire.
7. Turn the battery switch ON .
8. Turn the AC power switch to ON to restore AC power.
33AH batteries are NOT compatible if transformer kit model 3PHCONV is
installed.
INSTALLATION
Red Wires
21
Jumper
Black Wires
Red and Black Wires
Harness Kit Model K42-0102-000
Battery Wiring