Purkeys SELECT User manual

A MISSION CRITICAL ELECTRONICS BRAN
D
SELECT™& DIRECT™NOSEBOX
INSTALLATION GUIDE
300-18 R4.00

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P: 479.419.4800 | F: 479.419.4801 | www.purkeys.net
CONTENTS
General Information ..........................................................................................2
Dual/Single Nosebox Installation.....................................................................3
Aux Harness Installation ...................................................................................4
7-Way Nosebox Tips ..........................................................................................6
Main Harness Installation.................................................................................7
Interior Light Installation without Severe Service .......................................11
Installation Connections Outside the Nosebox..................................11
Interior Light Installation with Severe Service.............................................12
Momentary Switch (optional).........................................................................13
LED Logic..........................................................................................................14
Interior Light Control ............................................................................18
Limited Commercial Warranty Policy...........................................................21

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e Purkeys Select™ and Direct™ nosebox systems improve ligate battery
charging by utilizing a DC/DC converter to boost the voltage for optimal
charging.
e boost in voltage overcomes the normal voltage drop caused by the
extended distance between the ligate batteries and the vehicle charging
system. Also, in cold temperatures batteries require increased charging
voltages to maintain a high state of charge. e DC/DC converter
compensates for temperature by providing higher charging voltages in cold
weather. e result is well-charged ligate batteries that will last longer and
have ample power for ligate operation.
NOTE: Our ligate charging systems are designed to work with ooded cell
and AGM batteries. If you are using this system to charge any other type of
battery, please contact us at 479-419-4800 before installation.
GENERAL INFORMATION

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SELECT/DIRECT INSTALLATION GUIDE
Step 1: Using the supplied mounting
screws, mount the dual/single
Select or Direct nosebox at the
front of the trailer, near the 7-way
nosebox, via the mounting holes
on the plate.
Charging
Good Voltage
Low Voltage
Fault
Over-Temp Prot.
Green Solid
Green Blink
Orange Blink
Orange Rapid
Orange Solid
This product is patented. Includes 3-year warranty.
NOTE: The warranty will be void if the unit has
been drilled or modified. If you experience any
problems with this unit, please call 800-219-1269
and we will gladly assist you.
LED STATUS
L-098 R1.00
Note: Do not block the LED status
decal on the side of the Select/
Direct when mounting the
Nosebox.
Nosebox Mounting Complete.
DUAL/SINGLE NOSEBOX INSTALLATION
Note: e mounting plate can
be removed if space is an issue
or if a standard bolt pattern
is wanted. Simply remove the
plate and mount the nosebox
to the trailer using the supplied
mounting screws and the
standard bolt holes inside the
nosebox.

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AUX HARNESS INSTALLATION
Step 1: Route the jacketed aux and
ground 2-conductor from the
nosebox controller over to the
7-way nosebox.
Note: Place the cable clamps along the 7-way aux harness every 6 inches
to ensure proper support for the cable. Avoid sharp edges and possible
chang points.
Step 2: Position the 2-conductor
harness so that is reaches the
ground pin on the top of the 7-way
receptacle and the aux pin in the
center of the 7-way receptacle.
Mark the cable, then cut to length.
Step 3: Slide the supplied red 1/4
inch heat shrink over the blue
wire.
Slide the supplied black 1/4 inch
heat shrink over the white wire.

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SELECT/DIRECT INSTALLATION GUIDE
Step 4: Crimp the supplied 10 gauge
#10 eyelets onto both the blue and
white wires.
Step 5: Solder, then position the heat
shrink over the crimps and apply
heat to the 2 terminals.
Note: Place the cable clamps along the 7-way aux harness every 6 inches
to ensure proper support for the cable. Avoid sharp edges and possible
chang points.
Aux Harness Installation Complete.

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7-WAY NOSEBOX TIPS
SERVICE TIP - Purkeys oers the Ligate Double Check tool, which
can simplify the diagnosis of ligate charging system problems
caused by excessive voltage drop. For more information on the tool,
please call 1-800-219-1269 or visit our website at www.purkeys.net.
• Inspect circuits inside the 7-way box for excessive electrical resistance
caused by overheating, corrosion, loose/poor connections, or
undersized wiring.
• Check to see if the 7-way nosebox is equipped with circuit breakers
(see Figure 1), as the problem may be a failing circuit breaker. Either
replace circuit breaker with a new part or connect the blue wire from
the nosebox controller to the unprotected side of the circuit breaker.
Circuit protection is provided by the 30 amp fuse inside the nosebox
controller.
• Ensure the 7-way or stinger cord has a tight t and has good electrical
contact at the tractor and trailer receptacles.
Figure 1: 7-Way Nosebox

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P: 479.419.4800 | F: 479.419.4801 | www.purkeys.net
SELECT/DIRECT INSTALLATION GUIDE
Step 1: Route the 4-conductor
jacketed DC/DC converter main
harness behind the front plate,
then behind the header plate
through the air/electrical tube to
the center channel.
Step 2: Route the jacketed
4-conductor main harness in the
center channel toward the back of
the trailer. Secure with wire ties or
cable clamps as you go.
MAIN HARNESS INSTALLATION
Place the cable clamps along the 4-conductor jacketed wire every 6 inches
to ensure proper support for the cable. Avoid sharp edges and possible
chang points.
Step 3: Once you are near the ligate
battery box, begin routing the
4-conductor main harness into
the ligate battery box through a
dome nut or rubber grommet.
Note: Ensure that the 4-conductor jacketed wire enters the ligate battery
box through a dome nut or rubber grommet to prevent chang the wire,
which could result in possible electrical short in the system.

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Step 6: Cut about 8 inches o the
jacketed portion o the conductor.
Step 7: Apply the supplied ¾ inch
black heat shrink where the jacket
was stripped o.
Step 4: Position the 4-conductor
main harness so it will reach the
2-stud strip and all the slack has
been taken up. Mark the wire so
it can be taken back out of the
battery box to be terminated.
Step 5: Pull the conductor out of the
box (easier to work on), and cut
o the excess at the mark.
Note: If your battery box includes a slide-out tray, include enough slack to
allow the tray to fully extend without tugging the wire connections.