XP-6514 4/09
20
Section 1 Installation
Have a Lennox dealer or a licensed electrician make the
following
electrical
connections.
The
electrical
installation must comply with the National Electrical
Code (NEC) and all applicable local codes. Canadian
installations must comply with the Canadian Electrical
Code (CEC) and applicable local codes.
Ground the generator set from the GRD terminal inside
controller compartment according to applicable codes.
1.8.1
AC Connections
Refer to the
transfer switch
specifications and
Figure 1-23 for the acceptable cable sizes. Route AC
leads through flexible conduit. Ensure that the leads
and conduit do not interfere with the operation of the
generator set or obstruct the service areas.
GM54820
GM58022
Figure 1-23
Field-Connection Terminal Block
See Figure 1-23.
Leads have been factory-installed
from the junction box to the terminal block for easy field
wiring. Make field connections to the other side of the
terminal block. Refer to the decal near the terminal
block for connections and cable sizes.
1. Connect the leads from the transfer switch
emergency source lugs to the L1 and L2
connections on the generator set terminal block.
2. Connect the neutral (L0) and ground (GRD) leads
from the ATS and the main panel to the
corresponding connection points on the terminal
block.
See Section 1.8.3, Grounding.
See
Section 1.8.2 for remote start connections.
3. The
terminal
block
kit
includes
120 VAC
receptacles for the battery charger and optional
carburetor heater.
Connect utility power to the
terminal block as shown. Connect to a circuit that is
supplied by the generator set if utility power is lost.
See Section 1.5 for more information about the
120 VAC power requirement.
1.8.2
Remote Start Connection
Connect leads 3 and 4 from the
controller to the
automatic transfer switch’s engine start terminals or to
an optional remote start/stop switch. Route the engine
start leads through separate conduit from the AC power
and load leads.
1.8.3
Grounding
Ground the generator set. The grounding method must
comply with NEC and local codes.
Connect the
grounding strap to the generator set ground lug,
terminal GND inside the controller compartment.
Generator sets are shipped with the generator neutral
attached to the generator in the junction box.
At
installation, the neutral can be grounded at the
generator set or lifted from the ground stud and isolated
if the installation requires an ungrounded neutral
connection at the generator.
The generator set will
operate properly with the neutral either bonded to
ground or isolated from ground at the generator.
Various regulations and site configurations including the
National Electrical Code (NEC), local codes, and the
type of transfer switch used in the application determine
the grounding of the neutral at the generator. NEC 2002
Section 250.20 is one example that has a very good
explanation of the neutral grounding requirements for
generators.
1.8.4
Battery Charger
A 6-amp battery charger is factory-installed in the
battery compartment to keep the starting battery fully
charged. The battery charger’s DC leads are factory-
connected.
Plug the battery charger’s power cord into the
receptacle on the bottom of the controller junction box.
Refer to the generator set operation manual for battery
charger operation information.
