Lennox RGEN30 User manual

506090-01
E2008 Lennox Industries Inc.
Dallas, Texas 75379-9900
This manual provides installation instructions for
Model RGEN30 residential generator sets. Operation
manuals are available separately.
The generator set is approved for use in stationary
standby applications in locations served by a reliable
utility power source.
Have a Lennox dealer who is approved to sell and install
Lennox generator sets (hereinafter referred to as a
Lennox dealer) install the generator set outdoors
according to the instructions in this manual. The
generator set installation must comply with the National
Electrical Code (NEC) and local code requirements. Do
not install this generator set indoors. If the generator set
is installed in Canada, the installation must comply with
the Canadian Electrical Code (CEC) and all applicable
local codes.
Information in this publication represents data available
at the time of print. The manufacturer reserves the right
to change this publication and the products represented
without notice and without any obligation or liability
whatsoever.
Read this manual and carefully follow all procedures
and safety precautions to ensure proper equipment
operation and to avoid bodily injury. Read and follow the
Safety Precautions and Instructions section. Keep this
manual with the equipment for future reference.
Shipping and Packing List
1 -- Generator Set
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.
INSTALLATION
INSTRUCTIONS
RGEN30
RESIDENTIAL GENERATOR SET
XP-6341 6/10b
Table of Contents
Safety Precautions and Instructions 3.............
Introduction 7...................................
Section 1 General 8..............................
1.1 Introduction 8..............................
1.2 Enclosed Generator Sets 8..................
1.3 Unit-Mounted Radiator Cooling 8.............
1.4 Block Heater 8.............................
1.5 Fuel Supply 8.............................
1.5.1 Fuel Lines 8...............................
1.5.2 Gas Regulators 8..........................
1.6 Oil Makeup Kit 9...........................
1.7 Electrical System 9.........................
1.7.1 Line Circuit Breakers 9.....................
1.7.2 Electrical Connections 9....................
1.7.3 Load Lead Connections 9...................
1.7.4 Ground and Neutral Connections 10...........
1.7.5 Terminal Connector Torque 10................
1.7.6 Battery Chargers 12.........................
1.7.7 Alternator Factory Connection 12..............
1.7.8 Automatic Transfer Switches 12...............
Section 2 Installation Instructions 13...............
2.1 Introduction 13..............................
2.1.1 Location Factors 13.........................
2.1.2 Mounting Surface 14........................
2.1.3 Vibration Isolation 14........................
2.1.4 Lifting Generator Set 14......................
2.2 Installation Procedure 14.....................
2.2.1 Prepare Site 15.............................
2.2.2 Mount and Ground Generator Set 15..........
2.2.3 Connect AC and DC Wiring 16................
2.2.4 Install Engine Starting Battery 16..............
2.2.5 Install and Connect Fuel Supply 17............
2.2.6 Generator Set Fuel Systems 18...............
2.2.7 Fuel Conversion Procedures, Early Models 19..
2.2.8 Fuel Conversion Procedures, Later Models 21..
2.2.9 Add Coolant 22.............................
2.2.10 Check and Adjust Fuel System 22.............
2.2.11 Operation Tests 24..........................
Section 3 Controller 25............................
3.1 Controller Automatic Power Down 25..........
3.2 Code Version 25............................
3.3 Controller Configuration 25...................
3.4 Voltage Adjustments 29......................
Section 4 Diagrams and Dimension Drawings 32....
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE

XP-6341 6/102
Engine exhaust from this product contains chemicals
known to the State of California to cause cancer, birth
defects, or other reproductive harm.
WARNING
California Proposition 65
Product Identification Information
Product identification numbers determine service parts.
Record the product identification numbers in the spaces
below immediately after unpacking the products so that
the numbers are readily available for future reference.
Record field-installed kit numbers after installing the
kits.
Generator Set Identification Numbers
Record the product identification numbers from the
generator set nameplate(s).
Model Designation
Specification Number
Serial Number
Accessory Number Accessory Description
Controller Identification
Record the controller description from the generator set
operation manual, spec sheet, or sales invoice.
Controller Description
Engine Identification
Record the product identification information from the
engine nameplate.
Manufacturer
Model Designation
Serial Number

XP-6341 6/10 3Safety Precautions and Instructions
Safety Precautions and Instructions
IMPORTANT SAFETY INSTRUCTIONS.
Electromechanical equipment,
including generator sets, transfer
switches, switchgear, and accessories,
can cause bodily harm and pose
life-threatening danger when
improperly installed, operated, or
maintained. To prevent accidents be
aware of potential dangers and act
safely. Read and follow all safety
precautions and instructions. SAVE
THESE INSTRUCTIONS.
This manual has several types of safety
precautions and instructions: Danger,
Warning, Caution, and Notice.
DANGER
Danger indicates the presence of a
hazard that will cause severe
personal injury, death,or
substantial property damage.
WARNING
Warning indicates the presence of a
hazard that can cause severe
personal injury, death, or
substantial property damage.
CAUTION
Caution indicates the presence of a
hazard that will or can cause minor
personal injury or property damage.
NOTICE
Notice communicates installation,
operation, or maintenance information
that is safety related but not hazard
related.
Safety decals affixed to the equipment
in prominent places alert the operator
or service technician to potential
hazards and explain how to act safely.
The decals are shown throughout this
publication to improve operator
recognition. Replace missing or
damaged decals.
Accidental Starting
Accidental starting.
Can cause severe injury or death.
Disconnect the battery cables before
working on the generator set.
Remove the negative (--) lead first
when disconnecting the battery.
Reconnect the negative (--) lead last
when reconnecting the battery.
WARNING
Disabling the generator set.
Accidental starting can cause
severe injury or death. Before
working on the generator set or
connected equipment, disable the
generator set as follows: (1) Move the
generator set master switch to the OFF
position. (2) Disconnect the power to
the battery charger. (3) Remove the
battery cables, negative (--) lead first.
Reconnect the negative (--) lead last
when reconnecting the battery. Follow
these precautions to prevent starting of
the generator set by an automatic
transfer switch, remote start/stop
switch, or engine start command from a
remote computer.
Battery
Sulfuric acid in batteries.
Can cause severe injury or death.
Wear protective goggles and
clothing. Battery acid may cause
blindness and burn skin.
WARNING
Explosion.
Can cause severe injury or death.
Relays in the battery charger
cause arcs or sparks.
Locate the battery in a well-ventilated
area. Isolate the battery charger from
explosive fumes.
WARNING
Battery gases. Explosion can cause
severe injury or death. Battery gases
can cause an explosion. Do not smoke
or permit flames or sparks to occur near
a battery at any time, particularly when
it is charging. Do not dispose of a
battery in a fire. To prevent burns and
sparks that could cause an explosion,
avoid touching the battery terminals
with tools or other metal objects.
Remove all jewelry before servicing the
equipment. Discharge static electricity
from your body before touching
batteries by first touching a grounded
metal surface away from the battery. To
avoid sparks, do not disturb the battery
charger connections while the battery
is charging. Always turn the battery
charger off before disconnecting the
battery connections. Ventilate the
compartments containing batteries to
prevent accumulation of explosive
gases.
Battery electrolyte is a diluted
sulfuric acid. Battery acid can cause
severe injury or death. Battery acid
can cause blindness and burn skin.
Always wear splashproof safety
goggles, rubber gloves, and boots
when servicing the battery. Do not
open a sealed battery or mutilate the
battery case. If battery acid splashes in
the eyes or on the skin, immediately
flush the affected area for 15 minutes
with large quantities of clean water.
Seek immediate medical aid in the case
of eye contact. Never add acid to a
battery after placing the battery in
service, as this may result in hazardous
spattering of battery acid.

XP-6341 6/104 Safety Precautions and Instructions
Battery short circuits. Explosion
can cause severe injury or death.
Short circuits can cause bodily injury
and/or equipment damage.
Disconnect the battery before
generator set installation or
maintenance. Remove all jewelry
before servicing the equipment. Use
tools with insulated handles. Remove
the negative (--) lead first when
disconnecting the battery. Reconnect
the negative (--) lead last when
reconnecting the battery. Never
connect the negative (--) battery cable
to the positive (+) connection terminal
of the starter solenoid. Do not test the
battery condition by shorting the
terminals together.
Battery acid cleanup. Battery acid
can cause severe injury or death.
Battery acid is electrically conductive
and corrosive. Add 500 g (1 lb.) of
bicarbonate of soda (baking soda) to a
containerwith4L(1gal.)ofwaterand
mix the neutralizing solution. Pour the
neutralizing solution on the spilled
battery acid and continue to add the
neutralizing solution to the spilled
battery acid until all evidence of a
chemical reaction (foaming) has
ceased. Flush the resulting liquid with
water and dry the area.
Engine Backfire/Flash
Fire
Fire.
Can cause severe injury or death.
Do not smoke or permit flames or
sparks near fuels or the fuel system.
WARNING
Servicing the fuel system. A flash
fire can cause severe injury or death.
Do not smoke or permit flames or
sparks near the carburetor, fuel line,
fuel filter, fuel pump, or other potential
sources of spilled fuels or fuel vapors.
Catch fuels in an approved container
when removing the fuel line or
carburetor.
Servicing the air cleaner. A sudden
backfire can cause severe injury or
death. Do not operate the generator
set with the air cleaner removed.
Combustible materials. A fire can
cause severe injury or death.
Generator set engine fuels and fuel
vapors are flammable and explosive.
Handle these materials carefully to
minimize the risk of fire or explosion.
Equip the compartment or nearby area
with a fully charged fire extinguisher.
Select a fire extinguisher rated ABC or
BC for electrical fires or as
recommended by the local fire code or
an authorized agency. Train all
personnel on fire extinguisher
operation and fire prevention
procedures.
Exhaust System
Carbon monoxide.
Can cause severe nausea,
fainting, or death.
The exhaust system must be
leakproof and routinely inspected.
WARNING
Generator set operation. Carbon
monoxide can cause severe nausea,
fainting, or death. Carbon monoxide
is an odorless, colorless, tasteless,
nonirritating gas that can cause death if
inhaled for even a short time. Avoid
breathing exhaust fumes when working
on or near the generator set. Never
operate the generator set inside a
building. Never operate the generator
set where exhaust gas could seep
inside or be drawn into a potentially
occupied building through windows, air
intake vents, or other openings.
Carbon monoxide detectors.
Carbon monoxide can cause severe
nausea, fainting, or death. Install
carbon monoxide detectors on each
level of any building adjacent to the
generator set. Locate the detectors to
adequately warn the building’s
occupants of the presence of carbon
monoxide. Keep the detectors
operational at all times. Periodically
test and replace the carbon monoxide
detectors according to the
manufacturer’s instructions.
Carbon monoxide symptoms.
Carbon monoxide can cause severe
nausea, fainting, or death. Carbon
monoxide is a poisonous gas present in
exhaust gases. Carbon monoxide is an
odorless, colorless, tasteless,
nonirritating gas that can cause death if
inhaled for even a short time. Carbon
monoxide poisoning symptoms include
but are not limited to the following:
DLight-headedness, dizziness
DPhysical fatigue, weakness in
joints and muscles
DSleepiness, mental fatigue,
inability to concentrate
or speak clearly, blurred vision
DStomachache, vomiting, nausea
If experiencing any of these symptoms
and carbon monoxide poisoning is
possible, seek fresh air immediately
and remain active. Do not sit, lie down,
or fall asleep. Alert others to the
possibility of carbon monoxide
poisoning. Seek medical attention if
the condition of affected persons does
not improve within minutes of breathing
fresh air.
Fuel System
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling,
storing, and using fuels.
WARNING
The fuel system. Explosive fuel
vapors can cause severe injury or
death. Vaporized fuels are highly
explosive. Use extreme care when
handling and storing fuels. Store fuels
inawell-ventilatedareaawayfrom
spark-producing equipment and out of
the reach of children. Never add fuel to
the tank while the engine is running
because spilled fuel may ignite on
contact with hot parts or from sparks.
Do not smoke or permit flames or
sparks to occur near sources of spilled
fuel or fuel vapors. Keep the fuel lines
and connections tight and in good
condition. Do not replace flexible fuel

XP-6341 6/10 5Safety Precautions and Instructions
lines with rigid lines. Use flexible
sections to avoid fuel line breakage
caused by vibration. Do not operate the
generator set in the presence of fuel
leaks, fuel accumulation, or sparks.
Repair fuel systems before resuming
generator set operation.
Explosive fuel vapors can cause
severe injury or death. Take
additional precautions when using the
following fuels:
Propane (LP)—Adequate ventilation
is mandatory. Because propane is
heavier than air, install propane gas
detectors low in a room. Inspect the
detectors per the manufacturer’s
instructions.
Natural Gas—Adequate ventilation is
mandatory. Because natural gas rises,
install natural gas detectors high in a
room. Inspect the detectors per the
manufacturer’s instructions.
Gas fuel leaks. Explosive fuel
vapors can cause severe injury or
death. Fuel leakage can cause an
explosion. Check the LP vapor gas or
natural gas fuel system for leakage by
using a soap and water solution with
the fuel system test pressurized to
6--8 ounces per square inch
(10--14 inches water column). Do not
use a soap solution containing either
ammonia or chlorine because both
prevent bubble formation. A successful
test depends on the ability of the
solution to bubble.
Hazardous Noise
Hazardous noise.
Can cause hearing loss.
Never operate the generator set
without a muffler or with a faulty
exhaust system.
CAUTION
Engine noise. Hazardous noise can
cause hearing loss. Generator sets
not equipped with sound enclosures
can produce noise levels greater than
105 dBA. Prolonged exposure to noise
levels greater than 85 dBA can cause
permanent hearing loss. Wear hearing
protection when near an operating
generator set.
Hazardous Voltage/
Moving Parts
Hazardous voltage.
Will cause severe injury or death.
Disconnect all power sources before
opening the enclosure.
DANGER
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
areinplace.
Moving parts.
WARNING
Hazardous voltage.
Backfeed to the utility system can
cause property damage, severe
injury, or death.
If the generator set is used for
standby power, install an automatic
transfer switch to prevent inadvertent
interconnection of standby and
normal sources of supply.
WARNING
Welding the generator set.
Can cause severe electrical equip-
ment damage.
Never weld components of the
generator set without first discon-
necting the battery, controller wiring
harness, and engine electronic con-
trol module (ECM).
CAUTION
Grounding electrical equipment.
Hazardous voltage can cause
severe injury or death. Electrocution
is possible whenever electricity is
present. Ensure you comply with all
applicable codes and standards.
Electrically ground the generator set,
transfer switch, and related equipment
and electrical circuits. Turn off the main
circuit breakers of all power sources
before servicing the equipment. Never
contact electrical leads or appliances
when standing in water or on wet
ground because these conditions
increase the risk of electrocution.
Disconnecting the electrical load.
Hazardous voltage can cause
severe injury or death. Disconnect
the generator set from the load by
turning off the line circuit breaker or by
disconnecting the generator set output
leads from the transfer switch and
heavily taping the ends of the leads.
High voltage transferred to the load
during testing may cause personal
injury and equipment damage. Do not
use the safeguard circuit breaker in
place of the line circuit breaker. The
safeguard circuit breaker does not
disconnect the generator set from the
load.
Welding on the generator set. Can
cause severe electrical equipment
damage. Before welding on the
generator set perform the following
steps: (1) Remove the battery cables,
negative (--) lead first. (2) Disconnect
all engine electronic control module
(ECM) connectors. (3) Disconnect all
generator set controller and voltage
regulator circuit board connectors.
(4) Disconnect the engine battery-
charging alternator connections.
(5) Attach the weld ground connection
close to the weld location.
Installing the battery charger.
Hazardous voltage can cause
severe injury or death. An
ungrounded battery charger may
cause electrical shock. Connect the
battery charger enclosure to the ground
of a permanent wiring system. As an
alternative, install an equipment
grounding conductor with circuit
conductors and connect it to the
equipment grounding terminal or the
lead on the battery charger. Install the
battery charger as prescribed in the
equipment manual. Install the battery
charger in compliance with local codes
and ordinances.

XP-6341 6/106 Safety Precautions and Instructions
Connecting the battery and the
battery charger. Hazardous voltage
can cause severe injury or death.
Reconnect the battery correctly,
positive to positive and negative to
negative, to avoid electrical shock and
damage to the battery charger and
battery(ies). Have a qualified
electrician install the battery(ies).
Short circuits. Hazardous
voltage/current can cause severe
injury or death. Short circuits can
cause bodily injury and/or equipment
damage.Do not contact electrical
connections with tools or jewelry while
making adjustments or repairs.
Remove all jewelry before servicing the
equipment.
Engine block heater. Hazardous
voltage can cause severe injury or
death. The engine block heater can
cause electrical shock. Remove the
engine block heater plug from the
electrical outlet before working on the
block heater electrical connections.
Electrical backfeed to the utility.
Hazardous backfeed voltage can
cause severe injury or death. Install
a transfer switch in standby power
installations to prevent the connection
of standby and other sources of power.
Electrical backfeed into a utility
electrical system can cause severe
injury or death to utility personnel
working on power lines.
Heavy Equipment
Unbalanced weight.
Improper lifting can cause severe
injury or death and equipment
damage.
Do not use lifting eyes.
Lift the generator set using lifting bars
inserted through the lifting holes on
the skid.
WARNING
Hot Parts
Hot coolant and steam.
Can cause severe injury or death.
Before removing the pressure cap,
stop the generator set and allow it to
cool. Then loosen the pressure cap
to relieve pressure.
WARNING
Hot engine and exhaust system.
Can cause severe injury or death.
Do not work on the generator set until
it cools.
WARNING
Hot engine oil.
Can cause severe injury or death.
Avoid skin contact with hot oil. Do not
start or operate the generator set with
the engine oil filler cap removed, as
hot oil can spray out. Ensure that the
lubrication system is not under pres-
sure when servicing. Do not work on
the generator set until it cools.
WARNING
Servicing the exhaust system. Hot
parts can cause severe injury or
death. Do not touch hot engine parts.
The engine and exhaust system
components become extremely hot
during operation.
Notice
NOTICE
Canadian installations only.For
standby service connect the output of
the generator set to a suitably rated
transfer switch in accordance with
Canadian Electrical Code, Part 1.

XP-6341 6/10 7Introduction
Introduction
List of Related Literature
Figure 1 identifies related literature available for the
generator sets covered in this manual. Only trained and
qualified personnel should install or service the
generator set.
Literature Type Part Number
Installation Manual, RGEN30 XP-6341
Operation Manual (Generator Set) XP-6344
Parts Catalog* XP-6319
Service Manual (Engine) [TP-6362
Service Manual (Engine) wTP-6724
Service Manual (Generator Set) XP-6198
* One Parts Catalog combines generator and engine
information.
[Generator set serial numbers below 2272938
wGenerator set serial numbers above 2272938
Figure 1 Related Literature
Nameplate
The generator set nameplate contains the generator set
model, material number, and other information. See
Figure 2 for the nameplate location.
1
ADV-7692
1. Nameplate location on top of junction box
Figure 2 Nameplate Location (enclosure not shown)
Warranty Registration
Complete the startup and installation checklists
supplied with the startup notification form. Complete
and sign the startup notification form and return copies
as instructed on the form.

XP-6341 6/108 Section 1 General
Section 1 General
1.1 Introduction
Review this section and the Safety Precautions before
starting the installation procedure. The generator set
specification sheet also contains data that may be
required during the installation process.
The generator set and accessories must be installed by
a Lennox dealer or authorized representative. The
installation must comply with all applicable national and
local codes.
1.2 Enclosed Generator Sets
Install the generator set outdoors. Enclosed generator
sets include a factory-supplied sound enclosure. The
exhaust systems of enclosed units are complete for
outdoor installations. Review Section 1 and then refer to
Section 2 for the outdoor installation of enclosed units.
Note: DO NOT install enclosed units inside a
building.
1.3 Unit-Mounted Radiator
Cooling
The generator set is equipped with a unit-mounted
radiator common cooling system.
1.3.1 Cooling System Features
The system’s major components include an engine-
driven fan and circulating water pump, a radiator, and a
thermostat. The pump circulates water through the
engine until it reaches operating temperature. Then the
engine thermostat opens, allowing water circulation
through the radiator. The thermostat restricts water flow
as necessary to prevent overcooling. The fan blows air
from the engine side of the radiator across the cooling
surface.
1.3.2 Recommended Coolant
Add coolant before starting the generator set or
energizing the block heater.
The generator set manufacturer recommends a solution
of 50% ethylene glycol and 50% clean, softened water to
provide freezing protection to --37_C(--34_F) and
boiling protection to 129_C (256_F). A 50/50 solution
also inhibits corrosion. Consult the engine manufacturer’s
instructions for engine coolant specifications. See the
List of Related Materials in the Introduction.
1.4 Block Heater
Use block heaters on all standby applications where the
generator set is subject to temperatures below 16°C
(60°F). Connect the block heater to a power source that
is energized when the generator set is not running.
Note: Block heater damage. The block heater will fail
if the energized heater element is not immersed
in coolant. Fill the cooling system before turning
on the block heater. Run the engine until it is
warm and refill the radiator to purge the air from
the system before energizing the block heater.
1.5 Fuel Supply
Gas fuel systems operate on either LP (liquefied
petroleum) or natural gas. Refer to the the instructions
in Section 2.2.5 for more detailed information on fuel
requirements.
Note: Design and install gas fuel systems in
accordance with NFPA-54, National Fuel Gas
Code, and applicable local codes.
1.5.1 Fuel Lines
Gas lines. Never use fuel piping to ground electrical
equipment. The gas supplier is responsible for
installation, repair, and alteration to gas piping.
Use Schedule 40 black-iron pipe for gas piping. Copper
tubing may be used if the fuel does not contain hydrogen
sulfide or other ingredients that react chemically with
copper.
Line size. Size piping according to the requirements of
the equipment. Refer to the the instructions in
Section 2.2.5. In addition to actual fuel consumption,
consider the following pressure loss factors:
DPipe length
DOther appliances on the same fuel supply
DNumber of fittings
Flexible connections. Rigid mount the piping but
protect it from vibration. Use flexible connections
spanning a minimum of 152 mm (6 in.) between the
stationary piping and the engine fuel inlet connection.
1.5.2 Gas Regulators
Gas regulators reduce high incoming fuel pressures to
lower levels acceptable for engines. See the generator

XP-6341 6/10 9Section 1 General
set specification sheet for fuel supply pressure
requirements.
Primary gas regulator. The primary regulator reduces
the high pressure from a tank or transmission line to the
lower pressure required by the secondary regulator on
the engine. The fuel supplier provides the primary
regulator. The fuel supplier is also responsible for
providing sufficient gas pressure to operate the primary
regulator.
Secondary gas regulator. The secondary regulator is
factory-installed on the generator set engine and
controls the inlet pressure to the engine.
Integrated electronic secondary pressure
regulators. Models with generator set serial numbers
above 2272938 use an electronic pressure regulator.
See Section 2.2.7.
Note: The Integrated Electronic Pressure Regulator
(IEPR) and air/fuel mixer are specially calibrated
emission-control devices. Do not adjust the IEPR
or the air/fuel mixer.
1.6 Oil Makeup Kit
The oil makeup kit includes an oil level gauge and a
2-quart reservoir to provide additional oil for the engine.
Check the oil level in the gauge and reservoir, and follow
the instructions provided with the kit to add oil, if
necessary.
Note: The oil reservoir bottle looks similar to the coolant
bottle. Be sure to add oil only to the oil reservoir.
1.7 Electrical System
Before installing the generator set, provide for electrical
connections through conduit to the transfer switch and
other accessories for the generator set. Route DC leads
in separate conduit from AC conductors. Carefully
install the selected generator set accessories. Route
wiring to the generator set through flexible connections.
Comply with all applicable codes when installing a wiring
system.
1.7.1 Line Circuit Breakers
AC circuit protection. All AC circuits must include
circuit breaker or fuse protection. If the generator set is
not equipped with a factory-installed circuit breaker,
select a circuit breaker for up to 125% of the rated
generator set output current. The circuit breaker must
open all ungrounded connectors. The circuit breaker or
fuse must be mounted within 7.6 m (25 ft.) of the
alternator output terminals.
1.7.2 Electrical Connections
Several electrical connections must be made between
the generator set and other components of the system
for proper operation. Most field-installed accessory kits
include installation instructions. Comply with applicable
national and local codes when installing a wiring system.
Size the wire according to the length of run and 115% of
the circuit current (amperage) as directed by the
National Electrical Coder(NEC) in ANSI/NFPA 70.
For Canadian installations, refer to the Canadian
Electrical Code (CEC).
1.7.3 Load Lead Connections
Feed load leads to the generator set junction box
through the nonservice side of the box. See Figure 1-1.
Route DC leads in separate conduit from AC
conductors.
GM65412
2. Bring leads in through back of junction box.
Nonservice Side
2
Figure 1-1 Load Lead Access (enclosure not
shown)
The National Electrical Coder is a registered trademark of the National Fire Protection Association, Inc.

XP-6341 6/1010 Section 1 General
1.7.4 Ground and Neutral Connections
Ground the generator set. The grounding method must
comply with NEC and local codes. Connect the
grounding strap to the generator set ground lug. See
Figure 1-2 for the ground lug location inside the junction
box.
1. Ground (GRD) connection
1
GM69195
Figure 1-2 Generator Set Equipment Ground
Connection
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.
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.
1.7.5 Terminal Connector Torque
Use the torque values shown in Figure 1-3 or Figure 1-4
for terminal connectors. Refer to UL-486A, UL-486B,
and UL-486E for information on terminal connectors for
aluminum and/or copper conductors. Comply with
applicable national and local codes when installing a
wiring system.
Note: If a connector has a clamp screw such as a
slotted, hexagonal head screw with more than
one means of tightening, test the connector using
both applicable torque values provided in
Figure 1-4.
Socket Size Across
Flats, mm (in.)
Tightening Torque,
Nm (in. lb.)
3.2 (1/8) 5.1 (45)
4.0 (5/32) 11.4 (100)
4.8 (3/16) 13.8 (120)
5.6 (7/32) 17.0 (150)
6.4 (1/4) 22.6 (200)
7.9 (5/16) 31.1 (275)
9.5 (3/8) 42.4 (375)
12.7 (1/2) 56.5 (500)
14.3 (9/16) 67.8 (600)
Note: For values of slot width or length not corresponding to
those specified, select the largest torque value
associated with the conductor size. Slot width is the
nominal design value. Slot length is to be measured at
the bottom of the slot.
Figure 1-3 Tightening Torque for Pressure Wire
Connectors with Internal-Drive
Socket-Head Screws

XP-6341 6/10 11Section 1 General
Wire Size for Unit
Connection
Tightening Torque, Nm (in. lb.)
Slot Head 4.7 mm (No. 10) or Larger*
Hexagonal Head—External
Drive Socket Wrench
AWG, kcmil (mm2)
Slot Width <1.2 mm (0.047 in.)
Slot Length <6.4 mm (0.25 in.)
Slot Width >1.2 mm (0.047 in.)
Slot Length >6.4 mm (0.25 in.)
Split-Bolt
Connectors
Other
Connections
18--10 (0.82--5.3) 2.3 (20) 4.0 (35) 9.0 (80) 8.5 (75)
8 (8.4) 2.8 (25) 4.5 (40) 9.0 (80) 8.5 (75)
6--4 (13.3--21.2) 4.0 (35) 5.1 (45) 18.6 (165) 12.4 (110)
3 (26.7) 4.0 (35) 5.6 (50) 31.1 (275) 16.9 (150)
2 (33.6) 4.5 (40) 5.6 (50) 31.1 (275) 16.9 (150)
1 (42.4) — 5.6 (50) 31.1 (275) 16.9 (150)
1/0--2/0 (53.5--67.4) — 5.6 (50) 43.5 (385) 20.3 (180)
3/0--4/0 (85.0--107.2) — 5.6 (50) 56.5 (500) 28.2 (250)
250--350 (127--177) — 5.6 (50) 73.4 (650) 36.7 (325)
400 (203) — 5.6 (50) 93.2 (825) 36.7 (325)
500 (253) — 5.6 (50) 93.2 (825) 42.4 (375)
600--750 (304--380) — 5.6 (50) 113.0 (1000) 42.4 (375)
800--1000 (406--508) — 5.6 (50) 124.3 (1100) 56.5 (500)
1250--2000 (635--1016) — — 124.3 (1100) 67.8 (600)
* For values of slot width or length not corresponding to those specified, select the largest torque value associated with the conductor size.
Slot width is the nominal design value. Slot length is to be measured at the bottom of the slot.
Note: If a connector has a clamp screw such as a slotted, hexagonal head screw with more than one means of tightening, test the
connector using both applicable torque values.
Figure 1-4 Tightening Torque for Screw-Type Pressure Wire Connectors

XP-6341 6/1012 Section 1 General
1.7.6 Battery Chargers
An engine-driven, battery-charging alternator charges
the battery whenever the generator set operates.
Engine-driven systems can quickly restore the charge
used in a normal cranking cycle.
When the engine is not operating, a very low charge rate
from an AC-powered battery charger is usually sufficient
to maintain a full charge on the batteries.
1.7.7 Alternator Factory Connection
Figure 1-5 shows the factory connection for the
single-phase 120/240 V 60 Hz generator set. The
generator set is not reconnectable.
ADV-5875A--
100--120/200--240V, 60Hz
Figure 1-5 Single-Phase Factory Connection,
120/240 V 60 Hz
1.7.8 Automatic Transfer Switches
A typical standby system has at least one automatic
transfer switch connected to the generator set output to
automatically transfer the electrical load to the
generator set if the normal source fails. When normal
power returns, the switch transfers the load back to the
normal power source and then signals the generator set
to stop.
The transfer switch uses a set of contacts to signal the
engine/generator to start. When the normal source fails
and the generator set master switch is in the AUTO
position, the transfer switch contacts close to start the
generator set.
The engine start terminals are usually located near the
transfer switch contactor with an engine start decal
identifying the terminals. Use the transfer switch wiring
diagrams to identify the engine start terminals prior to
making connections.
Connect the transfer switch engine-start contacts or a
remote manual engine-start switch to the engine start
connectors on the generator set. Use the remote
harness with pigtail to connect to leads 3 and 4 from the
generator set controller to the engine-start leads from
the ATS. Size the wire according to the transfer switch
connection and the length of run. Use separate conduit
for the DC engine-start leads and the AC generator set
load cables and battery charger leads.

XP-6341 6/10 13Section 2 Installation Instructions
Section 2 Installation Instructions
2.1 Introduction
Have the generator set installed by a Lennox dealer or
authorized representative. Install the equipment in
compliance with the National Electrical Code (NEC) and
local codes. For Canadian installations, refer to the
Canadian Electrical Code (CEC).
Note: These instructions outline one procedure for
installing the generator set. Local codes may
require different procedures.
The generator set must be installed outdoors. The
exhaust systems on enclosed units are designed for
outdoor installation only. Review the information in
Section 1, General, before beginning the installation
procedure.
Note: DO NOT install enclosed generator sets inside a
building.
Note: Install carbon monoxide (CO) detector(s) on
each level of any building adjacent to a generator
set. Locate the detectors to adequately warn the
building’s occupants of the presence of carbon
monoxide.
Read and follow the safety precautions in this manual
and observe the decals on the equipment. Refer to the
diagrams and drawings in Section 4 for dimensions and
electrical connections during the installation procedure.
Read the entire installation procedure and obtain the
accessories and tools needed before beginning
installation. Perform the steps in the order shown.
To install optional accessories, follow the instructions
provided with each kit.
Hazardous voltage.
Backfeed to the utility system can
cause property damage, severe
injury, or death.
If the generator set is used for
standby power, install an automatic
transfer switch to prevent inadvertent
interconnection of standby and
normal sources of supply.
WARNING
Grounding electrical equipment. Hazardous voltage can
cause severe injury or death. Electrocution is possible
whenever electricity is present. Ensure you comply with all
applicable codes and standards. Electrically ground the
generator set, transfer switch, and related equipment and
electrical circuits. Turn off the main circuit breakers of all
power sources before servicing the equipment. Never contact
electrical leads or appliances when standing in water or on wet
ground because these conditions increase the risk of
electrocution.
Carbon monoxide.
Can cause severe nausea,
fainting, or death.
The exhaust system must be
leakproof and routinely inspected.
WARNING
Generator set operation. Carbon monoxide can cause
severe nausea, fainting, or death. Carbon monoxide is an
odorless, colorless, tasteless, nonirritating gas that can cause
death if inhaled for even a short time. Avoid breathing exhaust
fumes when working on or near the generator set. Never
operate the generator set inside a building. Never operate the
generator set where exhaust gas could seep inside or be
drawn into a potentially occupied buildingthrough windows, air
intake vents, or other openings.
Carbon monoxide detectors. Carbon monoxide can
cause severe nausea, fainting, or death. Install carbon
monoxide detectors on each level of any building adjacent to
the generator set. Locate the detectors to adequately warn the
building’s occupants of the presence of carbon monoxide.
Keep the detectors operational at all times. Periodically test
and replace the carbon monoxide detectors according to the
manufacturer’s instructions.
2.1.1 Location Factors
Ideally, the generator set should be mounted on
concrete at ground level. For above-ground installations,
including roof installations, weight considerations are
especially important. The building engineer must
determine whether the structure can support the weight
of the generator set.
The location of the generator set must:
DSupport the weight of the generator set and related
equipment such as batteries, radiators, and mounting
pad(s). Keep in mind that the mounting pad weight
may exceed the weight of the generator set.

XP-6341 6/1014 Section 2 Installation Instructions
DMeet applicable fire rating codes and standards.
DPosition the generator set over a noncombustible
surface. DO NOT allow accumulation of combustible
materials under or around the generator set.
DPermit vibration isolation to reduce noise and prevent
damage.
DNot be subject to flooding.
DProvide clearance for cooling air flow and access for
service. See Section 2.2 for required clearances from
obstructions and combustible materials.
DAllow safe expulsion of exhaust.
DMinimize the risk of public or unauthorized access.
Notice
DO NOT locate the generator set near patios,
decks, play areas, or animal shelters. Keep items
such as lawn furniture, toys, sports equipment,
and all combustible materials away from the
generator set exhaust outlet.
Remind family members, children, and visitors to
use caution near the generator set. Generator
sets connected to automatic transfer switches
start automatically during exercise periods and
power outages. Some generator set components
become hot when the generator set is running and
remain hot for a time after the generator set shuts
down.
2.1.2 Mounting Surface
The manufacturer recommends a single, level concrete
mounting pad. This method provides maximum stability
for the generator set. The recommended mounting pad
dimensions are shown in the dimension drawings in
Section 4.
Refer to the generator set dimension drawings for
conduit and fuel-line placement. The drawings give
dimensions for electrical and fuel connection rough-ins
and stub-ups.
2.1.3 Vibration Isolation
The generator set is equipped with neoprene vibration
isolators. Connections between the generator set or its
mounting base and any conduits or fuel lines must
include flexible sections to prevent breakage and to
isolate vibration.
2.1.4 Lifting Generator Set
Unbalanced weight.
Improper lifting can cause severe
injury or death and equipment
damage.
Do not use lifting eyes.
Lift the generator set using lifting bars
inserted through the lifting holes on
the skid.
WARNING
Enclosed units weigh approximately 500 kg (1100 lb.).
Use equipment that is rated for the generator set’s
weight to lift the unit into place. Lift the enclosure and
generator set together as one unit.
DO NOT lift the generator set using the lifting eyes
attached to the engine and/or alternator. These eyes
cannot support the generator set’s weight. Instead,
insert lifting hooks or lifting bars through the four holes in
the mounting skid. The placement of the holes
maintains balance during lifting.
2.2 Installation Procedure
Tools Required:
DMultimeter (for measuring voltage and current)
DFrequency meter (may be part of multimeter)
DManometer (for measuring fuel pressure)
DTorque wrench
DWrenches
DScrewdrivers
DSocket wrenches or nut drivers
DPliers
DSafety glasses or goggles
DDrill with bits and hole saw

XP-6341 6/10 15Section 2 Installation Instructions
Installer/Customer-Supplied Items:
DOne 12-volt battery with a minimum rating of 525 cold
crankingamps(CCA)at0_F.
DRemote harness with pigtail connector
(to connect ATS engine start, if used)
DGravel or crushed stone
DConcrete mounting pad
DCables and conduit
DFuel supply line with shutoff valve and pipe sealant
(provided by fuel supplier)
DCarbon monoxide (CO) detector(s)
Available Accessories:
DAir cleaner restriction indicator
DBattery
DBattery charger
DBattery heater
DBlock heater
DFlexible fuel lines
DMaintenance kit (includes filters and belt)
DNatural gas strainer
DRelay kit, includes common fault and auxiliary run
relays
DRemote digital gauge
DRemote harnesses
DRodent guards
2.2.1 Prepare Site
Choose a location that is at least 0.9 m (3 ft.) from any
building or structure and near the incoming gas service.
Allow a minimum of 2.4 m (8 ft.) clearance beyond the
exhaust end of the generator set. Plan the installation so
that the exhaust end of the generator set is not directed
toward the building or any openings where exhaust gas
could be drawn into the building.
Install carbon monoxide detectors on each level of any
building adjacent to the generator set. Locate the
detectors to adequately warn the building’s occupants of
the presence of carbon monoxide.
1. Obtain a building permit and contact your local
utility companies to mark the locations of
underground pipes and cables.
2. Prepare an area for mounting the generator set.
a. Clear all combustible materials, including
plants and shrubs, building materials, and lawn
furniture, from an area at least 2.4 m (8 ft.)
beyond the exhaust end of the generator set.
b. Spread a 76 mm (3 in.) thick layer of gravel to
support the concrete mounting pad. For the
mounting pad dimensions, see Figure 4-3 or
for weather enclosures or Figure 4-4 for sound
enclosures.
c. Lay a 100 mm (4 in.) thick concrete pad on the
gravel layer. Include mounting bolts and stub-
ups for the fuel supply and electrical conduit.
See Figure 4-3 or Figure 4-4 for the mounting
pad dimensions, mounting bolts, and stub-up
locations.
2.2.2 Mount and Ground Generator Set
1. Place the generator set on the concrete mounting
pad. Secure the generator set with mounting bolts
anchored in the concrete pad.
2. Remove the enclosure doors and alternator-end
panel to gain access to the junction box and other
generator set components during installation.
3. 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 GRD inside the junction box. See
Figure 2-1.
1. Neutral (L0) connection
2. Ground (GRD) connection
3. Relay interface board (RIB; standard 3--relay board shown)
4. Line circuit breaker
5. Load lead access opening and customer interface connector
4
3
5
2
1
GM39949B--R
Figure 2-1 Generator Set Electrical Connections
(enclosure not shown)

XP-6341 6/1016 Section 2 Installation Instructions
Generator sets are shipped with the generator set
neutral attached to the generator set 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 set. The
generator set will operate properly with the neutral
either bonded to ground or isolated from ground at
the generator set.
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 set. NEC 2002 Section 250.20 is
one example that has a very good explanation of
the neutral grounding requirements for generator
sets.
2.2.3 Connect AC and DC Wiring
Note: Have a licensed electrician make the following
electrical connections. All connections must
comply with state and local codes.
Size the wire according to the length of run and 115% of
the circuit current (amperage) as directed by the
National Electrical Coder(NEC) in ANSI/NFPA 70. See
Figure 2-1 and refer to the wiring diagrams in Section 4,
Diagrams and Drawings.
Refer to Section 1.7 for additional information about
connecting the electrical system.
Load Lead and Engine Start Connections
1. Install a 120 VAC receptacle for the generator set
battery charger and block heater. 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 2-1 and refer to transfer switch installation
manual for ATS connection instructions.
5. Use the remote harness with pigtail connector at
the customer interface connector to connect
engine start leads 3 and 4 to the engine start
terminals on the transfer switch. Refer to the
transfer switch installation manual for ATS
connection instructions.
6. If an auxiliary fault switch is used, connect it to
leads 30 and N at the customer interface
connector.
2.2.4 Install Engine Starting Battery
Explosion.
Can cause severe injury or death.
Relays in the battery charger
cause arcs or sparks.
Locate the battery in a well-ventilated
area. Isolate the battery charger from
explosive fumes.
WARNING
Battery gases. Explosion can cause severe injury or
death. Battery gases can cause an explosion. Do not smoke
or permit flames or sparks to occur near a battery at any time,
particularly when it is charging. Do not dispose of a battery in a
fire. To prevent burns and sparks that could cause an
explosion, avoid touching the battery terminals with tools or
other metal objects. Remove all jewelry before servicing the
equipment. Discharge static electricity from your body before
touching batteries by first touching a grounded metal surface
away from the battery. To avoid sparks, do not disturb the
battery charger connections while the battery is charging.
Always turn the battery charger off before disconnecting the
battery connections. Ventilate the compartments containing
batteries to prevent accumulation of explosive gases.
Use a 12 VDC battery with a minimum rating of
525 CCA.
1. Verify that the generator set master switch is in the
OFF/RESET position.
2. Ensure that the starting battery is fully charged
before placing the battery in service.
3. Clean the battery posts and/or adapters if
necessary.
4. Install battery post adapters, if needed.
5. See dimension drawing ADV-7000A in Section 4
for the battery rack location. Place the battery on
the battery rack on the skid.

XP-6341 6/10 17Section 2 Installation Instructions
6. Connect the red battery cable to the positive (+)
battery terminal.
7. Connect the black battery cable to the negative (--)
battery terminal.
8. Place the boots over the battery terminals.
9. Plug the battery charger into the 120 VAC power
supply.
2.2.5 Install and Connect Fuel Supply
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling,
storing, and using fuels.
WARNING
The fuel system. Explosive fuel vapors can cause severe
injury or death. Vaporized fuels are highly explosive. Use
extreme care when handling and storing fuels. Store fuels in a
well-ventilated area away from spark-producing equipment
and out of the reach of children. Never add fuel to the tank
while the engine is running because spilled fuel may ignite on
contact with hot parts or from sparks. Do not smoke or permit
flames or sparks to occur near sources of spilled fuel or fuel
vapors. Keep the fuel lines and connections tight and in good
condition. Do not replace flexible fuel lines with rigid lines. Use
flexible sections to avoid fuel line breakage caused by
vibration. Do not operate the generator set in the presence of
fuel leaks, fuel accumulation, or sparks. Repair fuel systems
before resuming generator set operation.
Note: Have the fuel piping and regulator installed by the
fuel supplier. The fuel supply installation must
comply with NFPA and local codes.
1. See Figure 2-2, Figure 2-3, and Figure 2-4 for the
fuel supply requirements. Add up the fuel
requirements for the generator set plus all other
gas-fired equipment fueled by the same supply.
2. Check that the primary regulator and gas meter
have sufficient capacity for the fuel requirements
for the generator set plus all other gas-fired
equipment. Have the fuel supplier install a larger
gas meter, if necessary.
Model Gas Flow Rate, Btu/hr.
RGEN30 450000
Figure 2-2 Gas Flow Rate (natural gas and LP)
Fuel Supply Specifications
Fuel type
LP Gas or Natural
Gas
Fuel supply inlet 3/4-14 NPT
Fuel supply pressure,
oz./in.2(in. H2O) 4--6 (7--11)
Nominal Fuel Rating, Btu/ft.3:
Natural gas 1000
LP vapor 2500
Figure 2-3 Fuel Requirements
Fuel Consumption m3/hr. (cfh)
Natural Gas at % Load
100% 12.7 (450)
75% 10.6 (375)
50% 8.5 (300)
25% 6.4 (225)
LP Gas at % Load
100% 5.1 (180)
75% 4.2 (150)
50% 3.4 (120)
25% 2.5 (90)
Figure 2-4 Fuel Consumption
3. Measure the pipe length from the primary gas
pressure regulator to the pipe connection on the
generator set fuel inlet. Add 2.4 m (8 ft.) to the
measured length for each 90 degree elbow. Use
the pipe size indicated in Figure 2-5 for the total
length of pipe.
Maximum Pipe Length m (ft.) Pipe Size
6.1 (20) 1 1/4 in. NPT
9.1 (30) 1 1/4 in. NPT
18.3 (60) 1 1/2 in. NPT
30.5 (100) 1 1/2 in. NPT
45.7 (150) 2in.NPT
61.0 (200) 2in.NPT
Figure 2-5 Fuel Pipe Sizes

XP-6341 6/1018 Section 2 Installation Instructions
Have your fuel supplier install a manual fuel shutoff
valve and rigid gas piping. Bring the pipe to within
254 mm (10 in.) of the generator set fuel inlet
location. See Figure 2-6.
Figure 2-6 Manual Fuel Shutoff Valve (outdoor
installation shown)
2.2.6 Generator Set Fuel Systems
Compare your fuel system to Figure 2-7 and Figure 2-8.
DGenerator sets with serial numbers below 2272938,
built before November 2, 2009, use the secondary
regulator shown in Figure 2-7.
DGenerator sets with serial numbers above 2272938,
built after November 2, 2009, use the fuel system
shown in Figure 2-8, which has an integrated
electronic pressure regulator (IEPR) mounted above
the engine.
Note: The integrated electronic pressure regulator
(IEPR) and air/fuel mixer are specially
calibrated emission-control devices. Do not
adjust the IEPR or the air/fuel mixer.
1
GM39949D--R
1. Fuel solenoid valve (2 required for UL2200)
2. 1/4 in. port for inlet fuel pressure (back side)
3. Secondary regulator (shown pointing down for LP)
4. Fuel supply connection
3
4
2
Note: UL 2200-listed units include a second fuel valve.
Figure 2-7 Early Model Fuel System (LP gas setup
shown)
3
Note: UL 2200-listed units include a second fuel valve. See
Figure 2-9.
2ADV-7692
1
1. Integrated electronic pressure regulator (IEPR)
2. Fuel solenoid valve
3. Fuel supply connection, 3/4 NPT
Figure 2-8 Later Model Fuel System with IEPR

XP-6341 6/10 19Section 2 Installation Instructions
2
GM39123
1. Fuel solenoid valves (qty. 2)
2. Fuel supply connection, 3/4 NPT
1
Figure 2-9 Fuel Supply Connection with Two Fuel
Valves
1. Remove the enclosure door on the service side of
the unit.
2. Connect the fuel supply:
a. Apply pipe sealant that is approved for fuel
connections to the threaded fuel connections.
b. Use a section of flexible fuel line to connect the
fuel supply to the fuel inlet connection on the
generator set. See Figure 2-7 or Figure 2-9 for
the fuel inlet connection location.
c. Open the manual fuel valves and leak test all
fuel connections using soapy water. If a leak is
detected, close the fuel valves, disconnect the
lines at the location of the leak, clean the
fittings, and apply fresh pipe sealant.
Reconnect the lines and recheck for leaks.
Note: After the system installation is complete,
you will be instructed to check for fuel
leaks with the generator set running.
See Section 2.2.11, Operation Tests.
2.2.7 Fuel Type Check and Conversion
Procedures, Early Models
Note: This procedure applies to models equipped with
the fuel regulator shown in Figure 2-7. For later
models equipped with the IEPR, see
Section 2.2.8.
Check that the fuel system is set up for the fuel being
used (natural gas or LP).
1. Check the orientation of the fuel regulator and
check the hang tag attached to the regulator. The
fuel regulator is installed pointing up for natural gas
or down for LP gas. See Figure 2-7.
2. Check fuel select leads 65 and 70A in the wiring
harness. See Figure 2-10. The leads are
connected for natural gas and disconnected for LP.
3. Use one of the following procedures to convert the
fuel system, if necessary.
4. After checking the fuel type and converting the fuel
system if necessary, proceed to Section 2.2.9, Add
Coolant.
1tp6341
1. Fuel select leads
Figure 2-10 Fuel Select Leads, Early Models (shown
connected for natural gas)

XP-6341 6/1020 Section 2 Installation Instructions
LP Fuel Conversion Procedure
Use the following steps to convert the fuel system to LP
gas, if necessary:
1. Remove the fuel regulator cover plug. See
Figure 2-11.
2. Remove the adjustment screw and spring from the
fuel regulator. Save the adjustment screw and
spring for possible conversion back to natural gas.
3. Reinstall the cover plug.
4. Rotate the regulator to point down as shown in
Figure 2-7.
5. Disconnect leads 65 and 70A at the quick connects
in the wiring harness. See Figure 2-10.
6. Proceed to Section 2.2.10 to check and adjust the
fuel supply pressure.
Natural Gas Fuel Conversion Procedure
Use the following steps to convert the generator set to
natural gas, if necessary:
1. Rotate the regulator so that it is pointing up.
2. Remove the fuel regulator cover plug. See
Figure 2-11.
SB-527
1. Fuel regulator
2. Spring
3. Adjustment screw
4. Cover plug
1
2
34
Figure 2-11 Fuel Regulator
3. Install the spring and adjustment screw.
4. Adjust the screw 11.1 mm (7/16 in.) down from the
top of the regulator.
5. Reinstall the cover plug.
6. Connect leads 65 and 70A at the quick-connects in
the wiring harness. See Figure 2-10.