NorthStar 951X, Руководство по установке

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SECTION TWO - Installing the unit
951/952 INSTALLATION MANUAL Revision B Page 13
Wiring the unit
The majority of installation problems are caused by shortcuts taken with
system cables. When installing the unit, be sure that you:
•
assemble connectors carefully
•
don’t make sharp bends
•
leave service and drip loops
•
tie-wrap all cables to keep them secure
•
if cables are shortened, lengthened, or re-terminated, seal all wiring
splices
The unit should be connected to a source of 10- to 40-volt electrical
power, using at least 16-gauge wire. A 10-foot fused power cable is sup-
plied with the unit, and should be long enough for most installations. If it
is necessary to lengthen the power cable, however, you may extend it to a
maximum of 25 feet (using at least 14-gauge wire for runs over 15 feet)
without adversely affecting the operation of the unit.
Electrical power
requirements
The unit is a negative-ground system that is reverse-polarity protected;
an external fuse prevents damage to sensitive components.
The wires in the 10-foot power cable must be connected as follows (black
and white can be connected together at the power source):
• Red
→
Po) (fused lead)
•
Black
→
Negative(–)
• White
→
Ground (earth)
CAUTION!
When flush-mounting, be sure to mount the unit on a flat sur-
face. Mounting on a curved surface can distort or break the
plastic and cause a breech in the waterproof seal. Do not over-
tighten as case damage may occur and waterproof integrity
may be compromised. This will void the warranty due to physi-
cal damage.
CAUTION!
Ensure that fuse or circuit-breaker protection is provided at the
power source.
NOTE:
If a noise-free earth grounding point isn’t available, the white
wire should be capped and insulated. It shouldn’t be used
when an earth ground isn’t available.