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Load Lead and Engine Start Connections
1. Install a 120 VAC receptacle for the generator set
battery charger and block heater, if equipped.
Supply power to the receptacle through a circuit
that is powered at all times, by the utility and by the
generator set during utility power outages.
2. Some codes require the use of a disconnect switch.
Check the code requirements for your location and
install a disconnect switch, if required.
3. Use separate conduit for the power cables and the
low voltage engine start leads. Local codes and the
length of run as well as the transfer switch wire size
requirements will determine the wire size needed
for the AC leads. Route the load leads into the
junction box through the access opening in the
back of the box.
4. Connect the load leads from the line circuit breaker
in the generator set junction box to the transfer
switch emergency power connection points. See
Figure 3-1 and refer to the transfer switch
Installation
Manual
instructions.
5. Use a minimum of 16 gauge wire for the engine
start connections. Connect the engine start leads
to leads 3 and 4 at the customer interface
connector and to the engine start terminals on the
transfer switch.
Installation
Manual
instructions.
6. If an auxiliary fault switch is used, connect it to
leads 30 and N at the customer interface
connector.
Optional Five-Relay Interface Board (RIB)
The optional relay interface board (RIB) has 5 relays and
a customer connection harness. The standard RIB has
3 relays with no customer connections required. See
Figure 3-1 for the RIB location.
The common fault relay is energized on a fault. The
auxiliary run relay is energized when the generator set is
running. When a relay is energized, the normally open
contacts close and the normally closed contacts open.
Connect customer equipment to connector P24 on the
optional relay board harness. Use 16 gauge or larger
leads for the relay connections. Connect to each relay's
normally open or normally closed contacts depending
on the requirements for the connected equipment. See
Figure 3-2 and the manufacturer's instructions for the
connected equipment.
26
Section 3 Installation Instructions
for
ATS
connection
Refer to the transfer switch
for
ATS
connection
Lead
P24 Pin
Number
Number
88
6
Common fault relay normally open
89
2
Common fault relay common
90
3
Common fault relay normally closed
91
4
Run relay normally open
92
1
Run relay common
93
5
Run relay normally closed
Figure 3-2 Optional Relay Connections
3.6 Exhaust Pipe Orientation
(Dropover Sound Enclosures)
Generator sets equipped with dropover style sound
enclosures are shipped with the exhaust pipe
disconnected from the silencer. Connect the exhaust
pipe after installing the enclosure. Install the exhaust
pipe with the opening pointed down and angled toward
the center of the generator set at a 45 degree angle. See
Figure 3-3 and the decal in the exhaust compartment of
the enclosure.
1. Exhaust pipe. Orient at 45 degree angle as shown.
Figure 3-3 Exhaust Pipe Orientation
Connection
1
GM36247
TP-6329 8/07
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