Specialty Concepts SCS/90 - Manual (Page 5)

INSTALLATION INSTRUCTIONS:
1. LOCATION: - A suitable location must be found for mounting the SCS. The unit
features mercury relays that require the unit to be mounted on a vertical surface.
This unit should also be as close as possible to the batteries to avoid errors in
battery voltage reading. The temperature sensor wire is 10 feet long and should
reach the battery bank if possible.
2. PROTECTION REQUIREMENTS: - The unit should not be placed in direct sunlight
or close to any heat generating source to avoid extreme temperature increases. It
must receive adequate protection from rain, dust and insects. The standard SCS is
supplied in an indoor NEMA 1 enclosure, or optional outdoor enclosures are
available.
3. INSPECT UNIT / PREPARE AND MOUNT THE SCS ENCLOSURE: - Remove the
inner panel of the SCS by unscrewing the four acorn nuts in the four corners.
Inspect the circuitry and hardware for connections that may have become loose
during transit. Determine the size and location of holes needed in the enclosure for
conduit hubs or strain relief feed-throughs for the wiring. Proceed with making holes
in the enclosure by punching out the knock-outs in the steel NEMA 1 and 3R
enclosures, or drilling holes in the plastic NEMA 4X enclosure. Return the inner
panel.
4. COMPLETE THE INSTALLATION OF PANEL, BATTERIES AND LOAD: - Follow
the manufacturer's instructions for mounting and wiring the solar panel, batteries
and the load.
5. SELECT WIRE
WIRE TYPE: - It is recommended to follow the NEC requirements for wiring
methods. Use stranded wire rather than solid wire whenever possible, because
stranded wire does not fatigue and cause loose connections over time as easily
as solid wire.
WIRE SIZE: - The SCS/50 terminal block accepts bare wire up to 6 AWG. The
SCS/90 terminal block accepts bare wire up to 1/0 AWG. Wire should be sized
of sufficient gauge to safely handle the rated current of the system and to limit
voltage drop. Consult wire sizing tables and local alternative energy system
suppliers for information on wire type and sizing.
6. REMOVE POWER FROM BATTERY / PANELS: - Disconnect power from the
batteries and panels prior to running the wires to the controller to prevent accidental
damage and/or bodily harm.
7. SET CIRCUIT BREAKERS TO “OFF”: - Make sure all three circuit breakers on the
SCS are “OFF”.