Grounding; Surge Suppression; Ferrite Filter - DKS 1834 PC Programmable Installation & Owner's Manual

2.1.3 Grounding

Proper grounding of this system is a requirement. To be effective, ground connections should be made with a minimum 12
AWG, 600 volt insulated wire to a ground point within 10 feet of the telephone entry system. The ground point must be at an
electrical panel, a metallic cold water pipe that runs in the earth, or a stainless steel grounding rod driven at least ten (10) feet
into the soil. A architectural style mounting post anchored to concrete does NOT make a good ground.
Ground to an existing electrical system.

2.1.4 Surge Suppression

The use of surge suppressors can significantly reduce the chance of component failure because of static charges or surges.
DoorKing recommends Installing a Phone Line surge suppressor (DoorKing P/N 1877-010 or equivalent) and two Low Voltage
surge suppressors (DoorKing P/N 1878-010 or equivalent) to help protect the entry system from power surges.
Phone Company
16.5 VAC, 20 VA
16.5 VAC, 20 VA

2.1.5 Ferrite Filter

The Telephone Entry System comes with a Ferrite Filter. This will
help prevent noise and hum pickup in the phone lines. Install around
the 16 VAC power wires on the main terminal #19 and #20 and the
Aux. terminal.
18
Some Acceptable Ground Sources
Ground
Wire
Ground to a metallic cold water pipe.
Phone Line Surge Suppressor
1877-010 PHONE LINE
Surge suppressor within 3 ft of ground source.
Low Voltage Surge Suppressor
1878-010 POWER LINE
Surge suppressor within 3 ft of ground source.
Low Voltage Surge Suppressor
1878-010 POWER LINE
Surge suppressor within 3 ft of ground source.
To install the ferrite filter, release the
clip on the side to open the filter,
place the wires in the circular core
and snap the filter closed.
IMPORTANT:
safety protection for clarity. Make sure
ground wire is protected from being
touched or electrical shock could occur!
Ground
Wire
Phone line surge suppressor
within 10 ft of entry system.
Low voltage surge suppressor
within 10 ft of entry system.
Low voltage surge suppressor
within 10 ft of entry system.
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C
1 6 A
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1 6 A
B A T
M a
1 N O
1 N C
2 R Y
2 C
2 0
1 9
1 8
1 7
1 6
1 5
1 4
Ground wire shown without
Grounding rod 10 feet in soil.
SP SP ABC ABC DEF DEF
1 1 2 2 3 3
GHI GHI JKL JKL MNO MNO
4 4 5 5 6 6
PQRS PQRS TUV TUV WXYZ WXYZ
7 7 8 8 9 9
OPER OPER
0 0
A
Z
CALL
C l i
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a s e
1834-065-B-10-14