Ditek DTK-120HW User Manual
DITEK Corporation
ONE DITEK CENTER
1720 Starkey Road
Largo, FL 33771
INSTALL INSTRUCTIONS
DTK-120HW
This Surge Protective Device (SPD) is a high performance device, designed to provide protection
for sensitive electronic loads connected to service panels, fire panels, or where the SPD is
directly connected to the electronic device. Maximum protection will only be achieved if the SPD
is properly installed. Please read and follow the installation instructions carefully.
NOTICE: This SPD should be installed by a qualified electrician in accordance with the National
and Local Electrical Codes and the following instructions.
APPLICATION:
Type 2 SPD for hardwired parallel installations on 120 VAC single branch circuits.
INSTALLATION
INSTRUCTIONS:
Caution: Measure all voltages to insure applied voltage does not exceed the voltage rating of
the unit. Improper installation voids the warranty.
NOTE: Suitable for use on a circuit capable of delivering not more than 10,000 rms symmetrical
Amperes, when protected by a 20 Ampere circuit breaker rated 120 Volts minimum.
This SPD Contains no serviceable parts.
1. Turn off the power at the circuit breaker or main before beginning installation.
2. Remove front cover from the panel.
Updated By: R. Mitchell 10-14-13
Approved By: H. Tu 10-14-13
3. Remove 3/4" knockout on side of panel box.
4. Unscrew nut from unit.
5. Feed all wires and the DTK-120HW nipple through knockout hole then through nut,
tighten nut securing the unit.
6. For ALARM/CONTROL PANEL INSTALLATION, refer to diagram #1. In this application,
make sure the DTK-120HW’s leads are as short as possible to the connection point
(isolated lugs or terminal).
Also, allow the unit reaction time by allowing no less than 3’ of conductor length between the
connection point and the equipment it is protecting.
7. For ELECTRICAL PANEL/DISCONNECT INSTALLATION, refer to diagram #2. In this
application, connect the DTK-120HW to the load side of the fuse or circuit breaker. Also, make
sure the leads are as short as possible with the ground wire being the shortest of all.
Ground Resistance Rule: Max ground resistance is 25 ohms, 5 ohms or less is optimum.
This cannot be an assumed value and must be measured to assure proper grounding.
8. After all connections have been made and no hazards exist, restore power.
9. This device features an internal protection that will disconnect the surge protective component
but will maintain power to the load - now unprotected. If this situation is undesirable for the
application, follow the manufacturer’s instructions for replacing the device.
NOTE: The LED on the unit must be on, if the LED is off than surge protection is compromised
and the unit must be replaced.
ALARM PANEL/CONTROL PANEL INSTALLATION
DIAGRAM #1
Battery
Circuit Board
Battery
DITEK Technical Support Available 24/7
1-888-472-6100
www.ditekcorp.com
120 VAC Power In
Connection Point
3’ Conductor Length
#12 AWG Minimum
DTK-120HW
ELECTRICAL PANEL/DISCONNECT INSTALLATION
DIAGRAM #2
Neutral Bus
Black wire
White Wire
DTK-120HW
Green Wire
Ground Bus
Doc # INT-100008-001
Part No. 191509 Rev. 6
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