RKI Instruments 49-8104RK - Manual (Page 4)

4 • 49-8104RK Standby Battery
Housing
The standby battery’s fiberglass housing is weather- and corrosion-resistant. It is suitable
for installation where general purpose equipment is in use. The housing door is hinged on
the left side and is secured by two latches on the right side. Four mounting feet are
attached to the back of the housing (one at each corner). The mounting feet allow you to
install the housing to a vertical surface. A conduit hub on the top of the housing is for
external wiring connections. A weather-resistant vent on the upper left side prevents
buildup of hydrogen in the housing if it is vented by the batteries.
Batteries
Two lead acid 12 VDC, 12 AH batteries are shipped with the housing but are not installed.
The batteries must be installed into the housing and connected with a wire jumper so that
they produce 24 VDC. Two wires must be connected to the batteries to allow connection to
the positive and negative of the standby battery. The ends of these wires are covered with
insulating shrink tubing to prevent shorting during shipment. These pieces of shrink
tubing will have to be removed during installation of the standby battery (see “Wiring the
Standby Battery to a Controller” on page 7).
Wire Nuts
Three wire nuts are provided with the standby battery for wiring connections. The wire
nuts are shipped in the standby battery packaged in a small plastic bag. Only two wiring
connections will have to be made to the standby battery (see “Wiring the Standby Battery
to a Controller” on page 7), so one of the wire nuts is provided as an extra in case one is
lost or damaged.