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.
Engine exhaust from this product contains chemicals
known to the State of California to cause cancer, birth
defects, or other reproductive harm.
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 NumberAccessory 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 6/102
Page 3
Safety Precautions and Instructions
IMPORTANT SAFETY INSTRUCTIONS.
Electromechanicalequipment,
including generator sets, transfer
switches, switchgear, and accessories,
can cause bodily harm and pose
life-threateningdangerwhen
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
hazardthatwillcausesevere
Caution indicates the presence of a
hazard that will or can cause minorpersonal injury or property damage.
NOTICE
Noticecommunicatesinstallation,
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
publicationtoimproveoperator
recognition.Replace missing or
damaged decals.
Accidental Starting
WARNING
Accidental starting.
Can cause severe injury or death.
Disconnect the battery cables before
working on thegenerator set.
Remove the negative (--) lead first
when disconnecting the battery.
Reconnect the negative (--) lead last
when reconnecting the battery.
Disablingthegeneratorset.
Accidentalstartingcancause
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, remotestart/stop
switch, or engine start command from a
remote computer.
Battery
WARNING
Sulfuric acid in batteries.
Can cause severe injury or death.
Wearprotectivegogglesand
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.
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.
Alwayswearsplashproofsafety
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 aidin 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 6/103Safety Precautions and Instructions
Page 4
Battery short circuits.Explosion
can cause severe injury or death.
Short circuits can cause bodily injury
and/orequipmentdamage.
Disconnectthebatterybefore
generatorsetinstallationor
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
chemicalreaction(foaming)has
ceased. Flush the resulting liquid with
water and dry the area.
Engine Backfire/Flash
Fire
WARNING
Fire.
Can cause severe injury or death.
Do not smoke or permit flames or
sparks near fuels or the fuel system.
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 injuryor 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
BCforelectricalfiresoras
recommended by the local fire code or
an authorized agency.Train all
personnelonfireextinguisher
operationandfireprevention
procedures.
Exhaust System
WARNING
Carbon monoxide.
Cancauseseverenausea,
fainting, or death.
Theexhaust systemmustbe
leakproof and routinely inspected.
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 whenworking
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.
Carbonmonoxidedetectors.
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
adequatelywarnthebuilding’s
occupants of the presence of carbon
monoxide.Keepthedetectors
operational at all times. Periodically
test and replace the carbon monoxide
detectorsaccordingtothe
manufacturer’s instructions.
Carbonmonoxidesymptoms.
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:
D Light-headedness, dizziness
D Physical fatigue, weakness in
joints and muscles
D Sleepiness, mental fatigue,
inability to concentrate
or speak clearly, blurred vision
D Stomachache, 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
possibilityofcarbonmonoxide
poisoning. Seek medical attention if
the condition of affected persons does
not improve within minutes of breathing
fresh air.
Fuel System
WARNING
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling,
storing, and using fuels.
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 6/104Safety Precautions and Instructions
Page 5
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.Ta k e
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 perthe 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 ouncespersquareinch
(10--14 inches water column). Do not
use a soap solution containing either
ammonia or chlorine because both
prevent bubble formation. Asuccessful
test depends on the ability of the
solution to bubble.
Hazardous Noise
CAUTION
Hazardous noise.
Can cause hearing loss.
Never operate the generator set
without a muffler or with a faulty
exhaust system.
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
DANGER
Hazardous voltage.
Will cause severe injury or death.
Disconnect all power sources before
opening the enclosure.
WARNING
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
areinplace.
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 ofstandby and
normal sources of supply.
CAUTION
Welding the generator set.
Can cause severe electrical equipment damage.
Never weld components of the
generator set without first disconnecting the battery, controller wiring
harness, and engine electronic control module (ECM).
Moving parts.
Grounding electrical equipment.
Hazardousvoltagecancause
severe injury or death. Electrocution
is possible whenever electricity is
present. Ensure you comply with all
applicablecodes andstandards.
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.
Hazardousvoltagecancause
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 batterychargingalternatorconnections.
(5) Attach the weld ground connection
close to the weld location.
ungrounded battery chargermay
cause electrical shock. Connect the
battery charger enclosure to the ground
of a permanent wiring system. As an
alternative,installanequipment
groundingconductorwithcircuit
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 6/105Safety Precautions and Instructions
Page 6
Connecting the battery and the
battery charger. Hazardous voltage
can cause severe injury or death.
Reconnectthebatterycorrectly,
positive to positive and negative to
negative, to avoid electrical shock and
damage to the battery charger and
battery(ies).Haveaqualified
electrician install the battery(ies).
Shortcircuits.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
makingadjustmentsorrepairs.
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 backfeedinto a utility
electrical system can cause severe
injury or death to utility personnel
working on power lines.
Hot Parts
WARNING
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.
Heavy Equipment
WARNING
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.
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 pressure when servicing. Do not work on
the generator set until it cools.
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 6/106Safety Precautions and Instructions
Page 7
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 TypePart Number
Installation Manual, RGEN30XP-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
w Generator set serial numbers above 2272938
Figure 1Related Literature
Nameplate
Warranty Registration
Complete the startup andinstallation checklists
supplied with the startup notification form. Complete
and sign the startup notification form and return copies
as instructed on the form.
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 2Nameplate Location (enclosure not shown)
XP-6341 6/107Introduction
Page 8
Section 1 General
1.1Introduction
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.
1.2Enclosed 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.
1.3Unit-Mounted Radiator
Cooling
The generator set is equipped with a unit-mounted
radiator common cooling system.
1.3.1Cooling System Features
The system’s major components include an enginedriven 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.
1.3.2Recommended Coolant
1.4Block 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.
1.5Fuel 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: Designandinstallgasfuelsystemsin
accordance with NFPA-54, National Fuel Gas
Code, and applicable local codes.
1.5.1Fuel 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:
D Pipe length
D Other appliances on the same fuel supply
D Number of fittings
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.
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.
1.5.2Gas Regulators
Gas regulators reduce high incoming fuel pressures to
lower levels acceptable for engines. See the generator
XP-6341 6/108Section 1 General
Page 9
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.
1.7.2Electrical 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).
Integratedelectronicsecondarypressure
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.
1.6Oil 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.
1.7Electrical 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.
1.7.3Load 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.
Nonservice Side
2
GM65412
2. Bring leads in through back of junction box.
Figure 1-1Load Lead Access (enclosure not
shown)
1.7.1Line 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.
The National Electrical Coder is a registered trademark of the National Fire Protection Association, Inc.
XP-6341 6/109Section 1 General
Page 10
1.7.4Ground 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
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.
1.7.5Terminal 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.
GM69195
1. Ground (GRD) connection
Figure 1-2Generator 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
Socket Size Across
Flats, mm (in.)
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.
Tightening Torque,
Nm (in. lb.)
Figure 1-3Tightening Torque for Pressure Wire
Connectors with Internal-Drive
Socket-Head Screws
XP-6341 6/1010 Section 1 General
Page 11
Tightening Torque, Nm (in. lb.)
Wire Size for Unit
Connection
AWG, kcmil (mm2)
Slot Head 4.7 mm (No. 10) or Larger*
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.)
* 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 1-4Tightening Torque for Screw-Type Pressure Wire Connectors
XP-6341 6/1011Section 1 General
Page 12
1.7.6Battery Chargers
1.7.8Automatic Transfer Switches
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.
1.7.7Alternator 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.
100-- 120/200--240V, 60Hz
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.
Figure 1-5Single-Phase Factory Connection,
120/240 V 60 Hz
ADV-5875A--
XP-6341 6/1012 Section 1 General
Page 13
Section 2 Installation Instructions
2.1Introduction
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.
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.
WARNING
Carbon monoxide.
Cancauseseverenausea,
fainting, or death.
Theexhaust systemmustbe
leakproof and routinely inspected.
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 occupiedbuilding 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 toadequately 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.
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 ofstandby and
normal sources of supply.
XP-6341 6/1013Section 2 Installation Instructions
2.1.1Location 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:
D Support 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.
Page 14
D Meet applicable fire rating codes and standards.
2.1.4Lifting Generator Set
D Position the generator set over a noncombustible
surface. DO NOT allow accumulation of combustible
materials under or around the generator set.
D Permit vibration isolation to reduce noise and prevent
damage.
D Not be subject to flooding.
D Provide clearance for cooling air flow and access for
service. See Section 2.2 for required clearances from
obstructions and combustible materials.
D Allow safe expulsion of exhaust.
D Minimize 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.
2.1.2Mounting 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.
WARNING
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.
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.
2.2Installation Procedure
Tools Required:
D Multimeter (for measuring voltage and current)
D Frequency meter (may be part of multimeter)
D Manometer (for measuring fuel pressure)
D Torque wrench
D Wrenches
D Screwdrivers
D Socket wrenches or nut drivers
D Pliers
D Safety glasses or goggles
D Drill with bits and hole saw
2.1.3Vibration 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.
D One 12-volt battery with a minimum rating of 525 cold
crankingamps(CCA)at0_F.
D Remote harness with pigtail connector
(to connect ATS engine start, if used)
D Gravel or crushed stone
D Concrete mounting pad
D Cables and conduit
D Fuel supply line with shutoff valve and pipe sealant
(provided by fuel supplier)
D Carbon monoxide (CO) detector(s)
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 stubups 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.
Available Accessories:
D Air cleaner restriction indicator
D Battery
D Battery charger
D Battery heater
D Block heater
D Flexible fuel lines
D Maintenance kit (includes filters and belt)
D Natural gas strainer
D Relay kit, includes common fault and auxiliary run
relays
D Remote digital gauge
D Remote harnesses
D Rodent guards
2.2.1Prepare 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 tomark thelocations 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.
2.2.2Mount 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.
3
2
1
4
5
GM39949B--R
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
Figure 2-1Generator Set Electrical Connections
(enclosure not shown)
XP-6341 6/1015Section 2 Installation Instructions
Page 16
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.
Variousregulationsandsiteconfigurations
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.
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 switchinstallation manual forATS
connection instructions.
6. If an auxiliary fault switch is used, connect it to
leads 30 and N at the customer interface
connector.
2.2.4Install Engine Starting Battery
WARNING
2.2.3Connect 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.
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.
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.
6. Connect the red battery cable to the positive (+)
battery terminal.
7. Connect the black battery cable to the negative (--)
battery terminal.
ModelGas Flow Rate, Btu/hr.
RGEN30450000
Figure 2-2Gas Flow Rate (natural gas and LP)
8. Place the boots over the battery terminals.
9. Plug the battery charger into the 120 VAC power
supply.
2.2.5Install and Connect Fuel Supply
WARNING
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling,
storing, and using fuels.
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. Donot 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.
Fuel Supply Specifications
LP Gas or Natural
Fuel type
Fuel supply inlet3/4-14 NPT
Fuel supply pressure,
2
oz./in.
Nominal Fuel Rating, Btu/ft.3:
(in. H2O)
Natural gas1000
LP vapor2500
Gas
4--6 (7--11)
Figure 2-3Fuel Requirements
Fuel Consumptionm3/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 2-4Fuel 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 2-5Fuel Pipe Sizes
XP-6341 6/1017Section 2 Installation Instructions
Page 18
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.
1
2
4
3
GM39949D-- R
Note: UL 2200-listed units include a second fuel valve.
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
Figure 2-6Manual Fuel Shutoff Valve (outdoor
installation shown)
2.2.6Generator Set Fuel Systems
Compare your fuel system to Figure 2-7 and Figure 2-8.
D Generator sets with serial numbers below 2272938,
built before November 2, 2009, use the secondary
regulator shown in Figure 2-7.
D Generator 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.
Figure 2-7Early Model Fuel System (LP gas setup
shown)
1
3
Note: UL 2200-listed units include a second fuel valve. See
Note: This procedure applies to models equipped with
Check that the fuel system is set up for the fuel being
used (natural gas or LP).
Procedures, Early Models
the fuel regulator shown in Figure 2-7. For later
modelsequippedwiththeIEPR,see
Section 2.2.8.
2.2.7Fuel Type Check and Conversion
GM39123
2
1. Fuel solenoid valves (qty. 2)
2. Fuel supply connection, 3/4 NPT
Figure 2-9Fuel 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,andapplyfreshpipesealant.
Reconnect the lines and recheck for leaks.
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.
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.
1
1. Fuel select leads
Figure 2-10 Fuel Select Leads, Early Models (shown
connected for natural gas)
XP-6341 6/1019Section 2 Installation Instructions
tp6341
Page 20
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
2
34
1. Fuel regulator
2. Spring
3. Adjustment screw
4. Cover plug
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.
SB-527
1. Rotate the regulator so that it is pointing up.
2. Remove the fuel regulator cover plug.See
Figure 2-11.
6. Connect leads 65 and 70A at the quick-connects in
the wiring harness. See Figure 2-10.
2.2.8Fuel Type Check and Conversion
Procedures, Later Models with
IEPR
Note: This procedure applies to models equipped with
the integrated electronic pressure regulator and
fuel valves shown in Figure 2-8.
Check the connections to the fuel solenoid valve to
verify that the fuel system is set up for the type of fuel that
will be used (natural gas or LP). See Figure 2-8 for the
location of the fuel solenoid valve.
To change the fuel type, change the connection to the
fuel solenoid valve as described below and shown in
Figure 2-12.
LP Connections:
D Disconnect lead 73A from the fuel valve.
D Connect lead 73B to the fuel valve.
D Connect lead 65 to lead N3 (ground).
Natural Gas Connections:
D Disconnect lead 65 from N3.
D Disconnect lead 73B from the fuel valve.
D Connect lead 73A to the fuel valve.
ADV-7602
Figure 2-12 Fuel Type Connections, Models with
IEPR
XP-6341 6/1021Section 2 Installation Instructions
Page 22
2.2.9Add Coolant
1
Follow the instructions below to fill the cooling system.
1. Close the radiator’s coolant drain valve and tighten
the hose clamps.
Note: Do not add coolant to a hot engine. Adding
coolant to a hot engine can cause the
cylinder block or cylinder head to crack.
Wait until the engine has cooled.
2. Fill the radiator with the recommended coolant
mixture of 50% ethylene glycol and 50% clean,
softened water to inhibit rust/corrosion and prevent
freezing. See Figure 2-13 for coolant capacity. Do
not replace the pressure cap at this time.
Note: A coolant solution of 50% ethylene glycol
provides freezing protection to--37°C
(--34°F) and overheating protection to
129°C (265°F). A coolant solution with less
than 50% ethylene glycol may not provide
adequatefreezingandoverheating
protection.A coolant solution with more
than 50% ethylene glycol can cause engine
or component damage. Do not use alcohol
or methanol antifreeze or mix them with the
specified coolant.
ModelCoolant Capacity , L (gal.)
15 kW11.5 (3.0)
30 kW11.5 (3.0)
2
3
1. Pressure cap (engine coolant fill)
2. Coolant overflow tube
3. Coolant overflow bottle
ADV-7692
Figure 2-14 Coolant Fill
2.2.10 Check and Adjust Fuel System
(early models only)
3. Check the oil level before operating the engine.
4. Operate the engine with the radiator’s pressure
cap removed until the thermostat opens and the
radiator upper hose becomes hot.
5. Stop the engine and allow it to cool.
6. Add coolant to the radiator to just below the
overflow tube on the filler neck. See Figure 2-14 for
the overflow tube location.
7. Replace the radiator’s pressure cap.
8. Maintain the coolant level in the coolant overflow
bottle between the High and Low markings. See
Figure 2-14 for the coolant overflow bottle location.
Hot engine and exhaust system.
Can cause severe injury or death.
Do not work on the generator set until
it cools.
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.
Use an oxygen sensor to check the fuel system
adjustment. Use Oxygen Sensor Service Kit Y1143.
1. Place the generator set master switch in the OFF
position.
2. Disconnect power to battery charger, if equipped.
3. Disconnect the generator set engine starting
battery, negative (--) lead first.
4. Allow the generator set to cool.
5. Install the oxygen sensor in the exhaust manifold at
the location shown in Figure 2-15.
tp6329
1. Exhaust manifold pipe plug
1
14. Use a digital multimeter to check the output voltage
and frequency. Verify 120 volts line-to-neutral and
60 Hz output.
15. Allow the generator set to run until the generator
set reaches normal operating temperature. The
timerequiredtoreachnormaloperating
temperature depends primarily on the ambient
temperature and the size of the engine.
16. With the generator set at normal operating
temperature, apply 90%--100% of rated load. If a
load bank is not available, apply a load at least
comparable to what is generally connected to the
generator set.
17. Adjust the fuel mixture adjustment screw (on the
mixer, see Figure 2-16) to obtain a full load oxygen
sensor voltage reading of 2.5 ±0.10 VDC (or a
lambda λ value of approximately 1.0 as indicated in
the instructions provided with the oxygen sensor
kit.
If the oxygen sensor voltage reading is too low with
the fuel mixture adjustment in the richest position
(turned in clockwise), turn the fuel regulator
adjustment screw clockwise and readjust the fuel
mixture adjustment screw.
Figure 2-15 Oxygen Sensor Mounting Location
6. Connect a manometer to check the fuel supply
pressure on the supply side of the fuel solenoid
valve. See Figure 2-7.
7. Connect the oxygen sensor harness as directed in
the instructions provided with oxygen sensor kit.
8. Check that the generator set master switch is in the
OFF position.
9. Reconnect the generator set engine starting
battery, negative (--) lead last.
10. Place the controller master switch in the RUN
position to start generator set.
11. Adjust the fuel supply pressure with the generator
set running at full load.Rotate the adjustment
screw on the primary fuel regulator until the
manometer indicates a fuel pressure of 7--11 in.
water column. Pressures below 7 in. water column
may result in poor response to load changes or lack
of power.
If the oxygen sensor voltage reading is too high
with the fuel mixture adjustment in the leanest
position (turned out counterclockwise), turn the
fuel regulator adjustment screw counterclockwise
and readjust the fuel mixture adjustment screw.
1
2
12. Reinstall the cover plug.
13. Check the fuel connections for leaks with the
generator set running.
19. Adjust the idle screw (see Figure 2-16) to obtain a
no-loadoxygensensor voltagereadingof
2.5 ±0.10 VDC(ora lambdaλvalue of
approximately 1.0).
20. Repeat steps 16 through 19 to verify the settings.
1. Verify that all guards are in place.Install the
enclosure’s end panels and nonservice side door.
2. Check the items in the Prestart Checklist in the
generator set operation manual.
3. Move the generator set master switch to the RUN
position to start the generator set.
21. Place the generator set master switch in the OFF
position to stop generator set.
22. Disconnect the generator set engine starting
battery(ies), negative (--) lead first.
23. Allow the generator set exhaust system to cool.
Disconnect and remove the oxygen sensor as
directed in the instructions provided with oxygen
sensor kit.
24. Reconnect the generator set engine starting
battery, negative (--) lead last.
25. Reconnect the power to the battery charger, if
equipped.
2.2.11Operation Tests
WARNING
4. Use a digital voltmeter (DVM) to check the output
voltage from the generator set.If voltage
adjustments are required, refer to Section 3.4 for
instructionstousethecontrollervoltage
adjustment menu.
5. Perform voltage checks as described in the ATS
operation and installation manual. Close the main
circuit breaker on the main distribution panel when
instructed to connect power in the test procedure.
6. Move the generator set master switch to OFF and
then to the AUTO position.
7. Install the enclosure’s service-side door. Verify that
all enclosure doors and panels are installed.
8. Test the system operation as described in the ATS
operation and installation manual.
9. Set the exerciser on the transfer switch to exercise
the generator set weekly. Refer to the instructions
in the ATS operation and installation manual.
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
areinplace.
The controller uses password-protected menus for
generatoroutputadjustmentsandcontroller
configuration.
This section contains instructions for using the
controller’s password-protected menus to check and
adjust the generator output and controller configuration.
The controller configuration and generator set output
are factory-set and should not require field adjustment
under normal circumstances. Check and adjust the
configuration and/or output when:
D The controller has been replaced.
D The voltage requires adjustment for a particular
application.
D Troubleshooting generator set problems.
Have controller setup and adjustment performed only by
a Lennox dealer or authorized representative.
3.1Controller Automatic Power
Down
With the generator set master switch in the AUTO
position, there are three possible controller power
modes.
48-hour power down. If the controller is not configured
for a CAN gauge (communications parameter setting
Cn00, see Section 3.3), the controller will power down
after 48 hours of no activity. If the generator set has
been started, the controller will power down 48 hours
after the generator stops. A remote start signal from a
transfer switch or remote switch connected to engine
start leads 3 and 4 will signal the controller to power up
and the generator set to start.
Continuous power mode.If the controller is
configuredforaCANgauge(communications
parameter setting Cn01), the controller will not power
down. The controller remains powered at all times to
allow remote start commands from the remote CAN
gauge.
1-hour power down.Setting the communications
parameter to Cn06 will cause the controller to power
down after 1 hour of no activity. In this mode, a remote
start/stop switch or the generator set master switch
must be used to activate the controller after it has
powered down.Controller application code version
1.21 or higher is required for the 1--hour power down
option.
3.2Code Version
Generator sets with serial numbers above 2272938
require ADC 2100 application code version 3.25 or later.
The code version is displayed as you enter the controller
configuration mode. See Figure 3-2.
3.3Controller Configuration
The controller configuration for each generator model is
set at the factory and should not normally require
changes. The controller’s configuration mode allows
adjustment of the system parameters listed in this
section. Use the instructions in this section to check the
configuration after installation and change them to
match the settings shown in Figure 3-1, if necessary.
Note: If the controller is replaced, the new controller will
need to be configured to the settings for the
generator set as described in this section.
Note: Thecontrollerwillautomaticallyexitthe
configuration mode without saving any changes
after about 1 minute if no buttons are pressed.
Start the configuration procedure over again from
thebeginningifthecontrollerexitsthe
configuration mode before the settings have
been saved.
XP-6341 6/1025Section 3 Controller
Page 26
ParameterSettingDefinition
Unit’s system voltage and frequencyUu01Single phase, 3 wire, 60 Hz, 120/240 VAC
Unit configurationUc01Standby
Engine type
Engine data input typesEd01
Battery VoltageBt12Battery voltage 12 VDC
Communications
* See Section 2.2.6.
Ec06RGEN30 (serial numbers below 2272938) *
Ec11RGEN30 (serial numbers above 2272938) *
RGEN30
Cn00No CAN communications, 48-hour power down
Cn01J1939 (use for Remote Digital Gauge), no power down
Cn06 *
Enables J1939 communications and 1-hour controller power
down after engine stop for either:
a. Remote start/stop switch
b. Automatic transfer switch
c. Remote Digital Gauge with remote start/stop switch and
replacement harness
Figure 3-1Configuration Parameters
Follow the instructions in Figure 3-2 to enter the
configuration mode while the engine is not running and
then step through the parameters. Use the up (
∨) arrow buttons to select the appropriate setting
down (
∧) and
for the application.
Note: Be sure to save your settings before exiting the
configuration mode.See Figure 3-4.The
controller reverts to the last saved settings when
the master switch is moved to the OFF/RESET
position.
Voltage/frequency setting (Uu).Set the system
voltage and frequency to the value shown in Figure 3-1.
Note: This parameter sets the nominal system voltage
and frequency. To adjust the output (measured)
voltage, see Section 3.4.
Unit configuration (Uc).This parameter sets the
generator set type: marine, standby, or mobile.
Engine configuration (Ec). The engine configuration
must match the generator set engine type. The Ec
setting for units built after November 2, 2009, is diffferent
than the setting for earlier units. See Figure 3-1 and
Section 2.2.6.
Advanced configuration mode (Adnc).The data
input types, battery voltage, and communications
setting can be changed in the advanced configuration
mode.Press the up arrow button when Adnc is
displayed to enter the advanced configuration mode.
SeeFigure3-3.
Engine data input types (Ed). This setting defines the
type of senders used on the generator set engine.
Battery voltage (Bt). This setting toggles between 12
and 24 VDC for the engine starting battery voltage. The
RGEN30 uses a 12-volt battery, Bt12.
Communications setting (Cn). This setting allows the
user to set the controller for communication with
optional meters. The RGEN30 is factory-set for no CAN
communications, Cn00. Change this setting to Cn01 or
Cn06 if an optional Remote Digital Gauge is used. See
Figure 3-1.
XP-6341 6/1026 Section 3 Controller
Page 27
Controller Configuration Mode:
Hold the Select button:
Move the generator set master switch to the
RUN position. (The generator set engine will
not start.)
Wait about 5 seconds until the display shows
the program version number. (The number
may be different than the one shown here.)
Press the down arrow key and then the up
arrow key 3 times to enter the configuration
mode. (This is the controller “password.”)
Now release the Select button.
Press:
or
To set the voltage/frequency setting to Uu01. See
Figure 3-1.
To step to the next parameter, unit configuration
Uc.
Display:
.0
1 0 4
U u 0 1
U u 0 1
or
or
Now either save your settings or enter the Advanced Configuration Mode to
set the engine data inputs, battery voltage, and communications.
Press:
or
orTo proceed to the save mode without
To set the unit configuration setting to Uc01, if
necessary.
To step to the next parameter, engine type Ec.
To change the engine type, if necessary.
To step to the next parameter, advanced
configuration mode or save mode selection.
To enter advanced configuration mode.
Go to Figure 3-3.
entering the advanced configuration mode.
Go to Figure 3-4.
U c1
0
E c 1 1
A d n c
E d 0 1
S A V E
Note: Shaded boxes show which number in the controller display changes when the up or down arrow
keyispressed.
Figure 3-2Configuration Mode (system voltage/frequency, unit configuration, and engine type parameters)
XP-6341 6/1027Section 3 Controller
Page 28
Pressing the up arrow key at the Adnc display (See Figure 3-2) puts you into
the Advanced Configuration Mode.
Press:
or
or
or
Note: Be sure to save your settings before exiting the configuration mode. The controller reverts
to the last saved settings when the master switch is moved to the OFF/RESET position.
Figure 3-3Advanced Configuration Mode (engine data input type, battery voltage, and engine communications)
To set the engine data input type to Ed01.
SeeFigure3-1.
To enter battery voltage selection mode.
To toggle between 12 and 24 VDC. Set this
parameter to 12 VDC.
To enter communications selection mode.
To set the communications parameter Cn.
SeeFigure3-1.
To enter SAVE mode. Go to Figure 3-4.
E d 0 1
B t 1 2
C n 0 0
S A V E
There are 3 options when the display says SAVE:
Press:
To return to the first parameter, system voltage/frequency
Uu, to check or change settings before saving. See
Figure 3-2.
or
To save changes.
or
To discard changes without saving.
“Yes”or “no” flashes when the up or down arrow is pressed and then
the controller exits the configuration mode. The display returns to
the runtime hours.
Now move the master switch to OFF/RESET.
* X in the runtime hours display above denotes any number from 0 to 9.
Figure 3-4Save Mode (after configuring generator set parameters)
S A V E
U u 0 1
Y E S
n o
x xxx
XP-6341 6/1028 Section 3 Controller
Page 29
3.4Voltage Adjustments
Pressing the Select button when SAVE is displayed
returns to the first parameter, voltage adjust (1P).
WARNING
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
areinplace.
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.
The controller’s adjustment mode allows adjustment of
the output voltage, if necessary.Have adjustments
performed by a Lennox dealer or service technician.
Note: Adigitalvoltmeter isrequired forthese
adjustments.
Use a voltmeter to check the output voltage. If the output
voltage is not within specifications, use the controller to
adjust the output voltage while the generator set is
running. The flowcharts in Figure 3-6 and Figure 3-7
outline the adjustment procedures.
Note: Be sure to save your settings before exiting the
configuration mode.
Moving parts.
Note: Refer to the flowcharts in Figure 3-6 and
Figure 3-7duringthevoltageadjustment
procedure.
Voltage Adjustment Procedure
1. With the generator set off, connect a digital
multimeter to the output leads or an electrical outlet
on the load side of the generator set. Set the meter
to measure AC voltage.
2. Start the generator set by moving the generator set
master switch to the RUN position.
3. Use the controller to adjust the voltage (parameter
1P) until the output voltage reaches the desired
value. See Figure 3-5 for the approximate change
in voltage per step in parameter 1P. See Figure 3-6
for adjustment instructions.
Measured
Voltage, VAC
85--13250.5
180--25170.7
Voltage Change per Step, VAC
Coarse AdjustFine Adjust
Figure 3-5Voltage Adjustment (approximate)
4. Adjust the voltage stability (gain, parameter 2P) to
minimize lightflicker.See Figure 3-6for
adjustment instructions.
5. Readjust the voltage, if necessary.
Voltage changes are lost if they are not saved before the
generator set shuts down. The generator set continues
6. Save the controller settings as described in
Figure 3-7.
to run with the new settings until it shuts down but then
reverts to the previous settings at the next startup if the
7. Stop the generator set.
changes have not been saved.
XP-6341 6/1029Section 3 Controller
Page 30
Output Voltage Adjustment Mode:
Move the generator set master switch to the RUN position. The generator set
engine starts and the controller display shows the engine runtime hours.
Display :*
x x x x
Hold:
The controller is now in the voltage coarse adjustment mode.
Press:
Wait about 5 seconds until the display changes from runtime hours
to the program version number.
Press the down arrow key and then the up arrow key 3 times to enter the
adjustment mode. (This is the controller “password.”)
or
or
To raise or lower the voltage in large increments
(approximately 5--7 volts per step).
To enter fine voltage adjustment mode.
To raise or lower the voltage in smaller increments
(approximately 0.5--0.7 volts per step).
x
1 P
1 P
1 P
.
x x
x x
x x
xx
To enter coarse voltage stability (gain) adjustment mode.
2 P
or
To raise or lower the voltage stability (gain) in large
increments.
To enter fine voltage stability (gain) adjustment mode.
2 P
or
To raise or lower the voltage stability (gain) in smaller
increments.
To enter volts/Hz adjustment mode.
3 P 0
or
Continued on Figure 3-7.
* Shaded boxes show which character in the controller display changes for each adjustment. X in the
examples above denotes any number from 0 to 9. The actual values may vary from model-to-model.
To raise or lower the volts/Hz: 00=low; 09= high
x x
xx
x
TP6196
Figure 3-6Output Voltage Adjustments
XP-6341 6/1030 Section 3 Controller
Page 31
Continued from Figure 3-6:
Display:*
To enter SAVE mode.
Note: Be sure to save your settings before exiting the configuration mode. The controller reverts to
the last saved settings when the master switch is moved to the OFF/RESET position.
There are 3 options when the display says SAVE:
Press:
To return to the first parameter, coarse voltage adjustment, to check
or change settings before saving. See Figure 3-6.
or
To save changes.
or
To discard changes without saving.
“Yes”or “no” flashes when the up or down arrow is pressed and then the
controller exits the configuration mode. The display returns to the
runtime hours.
S A V E
S A V E
1 P
x x
Y E S
n o
x x x x
Now move the master switch to OFF/RESET.
* X in the examples above denotes any number from 0 to 9. The actual values may vary from model-to-
model.
Figure 3-7Output Voltage Adjustments, Continued
XP-6341 6/1031Section 3 Controller
Page 32
Section 4 Diagrams and Dimension Drawings
Later model generator sets use an updated fuel system.
See Section 2.2.6 and compare your generator set’s fuel
system to Figure 2-7 and Figure 2-8 to determine which
fuel system is installed, or check the generator set serial
number on the nameplate.Then see Figure 4-1 to
determine which version number to use.Find the