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INSTALLATION
MANUAL
A new standard of reliability
Not intended for use in critical life support applications!
OUTDOOR INSTALLATION ONLY!
This manual should remain with the unit.
INTRODUCTION
Thank you for purchasing this model of the standby generator set.
Every effort was expended to make sure that the information and instructions in this manual are both accurate and current at the time the manual was written. However, the manufacturer reserves the right to change, alter or otherwise improve this product(s) at any time without prior notice.
READ THIS MANUAL THOROUGHLY
If any portion of this manual is not understood, contact the nearest
Dealer for starting, operating and servicing procedures.
Throughout this publication, and on tags and decals affixed to the generator, DANGER, WARNING, CAUTION and NOTE blocks are used to alert personnel to special instructions about a particular service or operation that may be hazardous if performed incorrectly or carelessly. Observe them carefully. Their definitions are as follows:
DANGER
After this heading, read instructions that, if not strictly complied with, will result in serious personal injury, including death.
After this heading, read instructions that, if not strictly complied with, could result in serious personal injury, including death.
After this heading, read instructions that, if not strictly complied with, might result in minor or moderate injury.
NOTE:
After this heading, read instructions that, if not strictly complied with, may result in damage to equipment and/or property.
These safety warnings cannot eliminate the hazards that they indicate. Common sense and strict compliance with the special instructions while performing the service are essential to preventing accidents.
Four commonly used safety symbols accompany the DANGER,
WARNING and CAUTION blocks. The type of information each indicates is as follows:
This symbol points out important safety information that, if not followed, could endanger personal safety and/or property of others.
This symbol points out potential explosion hazard.
This symbol points out potential fire hazard.
This symbol points out potential electrical shock hazard.
HOW TO OBTAIN SERVICE
When the generator requires servicing or repairs, contact a Dealer for assistance. Service technicians are factory-trained and are capable of handling all service needs.
When contacting a Dealer about parts and service, always supply the complete Model number, Serial number and Type Code (where applicable), of the unit as given on the Data Label affixed to the unit.
Table of Contents
Liquid-cooled Generators
INTRODUCTION ........................Inside Front Cover
Read this Manual Thoroughly .......................................... IFC
How to Obtain Service .................................................... IFC
SAFETY RULES ...................................................... 2
GENERAL INFORMATION ...................................... 4
Generator Installation ............................................................... 4
Before Installation .................................................................... 4
Other Published Standards ................................................. 4
Generator Location ................................................................... 5
Generator Mounting and Support ............................................. 5
Combustible Floor and Roof Protection .............................. 5
Unpacking ................................................................................ 5
Inspection.......................................................................... 5
Lifting the Generator ................................................................ 5
External Muffler or Catalyst Installation ..................................... 6
Muffler Assembly directions............................................... 6
Fuel Systems ........................................................................... 6
Introduction to Gaseous Fuel Systems ............................... 6
Properties of Gaseous Fuels .............................................. 6
The Natural Gas System .................................................... 6
LP Gas Vapor Withdrawal System ...................................... 7
Gaseous Fuel System Piping .............................................. 8
Calculating Volumetric Flow Rate and Pipe Size ........................ 8
Calculating Volumetric Flow Rate ....................................... 8
Calculating Pipe Size ......................................................... 9
Electrical Connections ............................................................ 11
Grouding the Generator .................................................... 11
Battery Charger Connection ............................................. 11
Battery Installation ................................................................. 11
Connection Diagrams ............................................................. 12
R-series Panel Connections ............................................. 12
H-100 Series Panel Connections ...................................... 13
G-series Panel Connections ............................................. 13
Block Heater Connections ................................................ 13
Wire Recommendations/Sizing ............................................... 13
NOTES ................................................................................... 17
1
IMPORTANT SAFETY INSTRUCTIONS
Liquid-cooled Generators
SAVE THESE INSTRUCTIONS – The manufacturer suggests that these rules for safe operation be copied and posted in potential hazard areas. Safety should be stressed to all operators, potential operators, and service and repair technicians for this equipment.
SAVE THESE INSTRUCTIONS – This manual contains important instructions that should be followed during installation of the generator and batteries.
WARNING:
The engine exhaust from this product contains chemicals known to the state of California to cause cancer, birth defects or other reproductive harm.
WARNING:
This product contains or emits chemicals known to the state of California to cause cancer, birth defects or other reproductive harm.
Study these SAFETY RULES carefully before installing, operating or servicing this equipment. Become familiar with this manual and with the unit. The generator can operate safely, efficiently and reliably only if it is properly installed, operated and maintained. Many accidents are caused by failing to follow simple and fundamental rules or precautions.
The manufacturer cannot anticipate every possible circumstance that might involve a hazard. The warnings in this manual, and on tags and decals affixed to the unit, are, therefore, not all-inclusive.
If using a procedure, work method or operating technique the manufacturer does not specifically recommend, ensure that it is safe for others. Also make sure the procedure, work method or operating technique that chosen does not render the generator unsafe.
GENERAL HAZARDS
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For safety reasons, the manufacturer recommends that the installation, initial start-up and maintenance of this equipment is carried out by an Authorized Service Dealer.
Keep hands, feet, clothing, etc., away from drive belts, fans, and other moving or hot parts. Never remove any drive belt or fan guard while the unit is operating.
When working on this equipment, remain alert at all times.
Never work on the equipment when physically or mentally fatigued.
Inspect the generator regularly, and contact the nearest
Authorized Service Dealer immediately for parts needing repair or replacement.
Inspect the generator regularly, and contact the nearest
Authorized Service Dealer immediately for parts needing repair or replacement.
Before performing any maintenance on the generator, disconnect its battery cables to prevent accidental start up. Disconnect the cable from the battery post indicated by a NEGATIVE, NEG or (–) first. Reconnect that cable last.
Never use the generator or any of its parts as a step. Stepping on the unit can stress and break parts, and may result in dangerous operating conditions from leaking exhaust gases, fuel leakage, oil leakage, etc.
DANGER
Despite the safe design of this generator, operating this equipment imprudently, neglecting its maintenance or being careless can cause possible injury or death. Permit only responsible and capable persons to operate or maintain this equipment.
Potentially lethal voltages are generated by these machines. Ensure all steps are taken to render the machine safe before attempting to work on the generator.
Parts of the generator are rotating and/or hot during operation. Exercise care near running generators.
Generator exhaust gases contain DEADLY carbon monoxide gas. This dangerous gas, if breathed in sufficient concentrations, can cause unconsciousness or even death.
ENGINE EXHAUST HAZARDS
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Generator engine exhaust contains DEADLY carbon monoxide, an odorless, colorless poisonous gas. Breathing carbon monoxide can cause: dizziness, throbbing temples, nausea, muscular twitching, headache, vomiting, weakness and sleepiness, inability to think clearly, fainting, unconsciousness or even death. If you experience any carbon monoxide poisoning symptoms, move into fresh air and immediately seek medical attention.
Never operate the generator set with the vehicle inside any garage or other enclosed area.
Adequate, unobstructed flow of cooling and ventilating air is critical for expelling toxic carbon monoxide gas and fuel vapors from the generator compartment and for proper generator operation. Without sufficient cooling airflow, deadly carbon monoxide gas can accumulate and the engine/generator may quickly overheat, causing serious damage to the generator. Do not operate the genset in any confined space.
The exhaust system must be installed in accordance with the genset installation manual. Do not alter the installation or permit even partial blockage of ventilation systems, as this can seriously affect the safe and proper operation of the generator.
2
IMPORTANT SAFETY INSTRUCTIONS
Liquid-cooled Generators
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Do not operate the generator if the exhaust system is leaking or has been damaged or if you have experienced carbon monoxide poisoning symptoms during use. Shut down the generator and do not operate it until it has been inspected and/or repaired.
Never sleep in the vehicle while the genset is running unless the vehicle has a working carbon monoxide detector.
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ELECTRICAL HAZARDS
The generator covered by this manual produces dangerous electrical voltages and can cause fatal electrical shock. Avoid contact with bare wires, terminals, connections, etc., while the unit is running. Ensure all appropriate covers, guards and barriers are in place before operating the generator. If work must be done around an operating unit, stand on an insulated, dry surface to reduce shock hazard.
Do not handle any kind of electrical device while standing in water, while barefoot, or while hands or feet are wet.
DANGEROUS ELECTRICAL SHOCK MAY RESULT.
During installation onto the vehicle, have the generator properly grounded (bonded) either by solid mounting to the vehicle frame or chassis, or by means of an approved bonding conductor. DO NOT disconnect the bonding conductor, if so equipped.
DO NOT reconnect the bonding conductor to any generator part that might be removed or disassembled during routine maintenance. If the grounding conductor must be replaced, use only a flexible conductor that is of No. 8 American Wire Gauge (AWG) copper wire minimum.
In case of accident caused by electric shock, immediately shut down the source of electrical power. If this is not possible, attempt to free the victim from the live conductor. AVOID
DIRECT CONTACT WITH THE VICTIM. Use a nonconducting implement, such as a rope or board, to free the victim from the live conductor. If the victim is unconscious, apply first aid and get immediate medical help.
Never wear jewelry when working on this equipment. Jewelry can conduct electricity resulting in electric shock, or may get caught in moving components causing injury.
FIRE HAZARDS
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For fire safety, the generator must be installed and maintained properly. Installation always must comply with applicable codes, standards, laws and regulations. Adhere strictly to local, state and national electrical and building codes. Comply with regulations the Occupational Safety and Health Administration
(OSHA) has established. Also, ensure that the generator is installed in accordance with the manufacturer’s instructions and recommendations. Following proper installation, do nothing that might alter a safe installation and render the unit in noncompliance with the aforementioned codes, standards, laws and regulations.
Keep a fire extinguisher in the vehicle at all times. Extinguishers rated “ABC” by the National Fire Protection Association are appropriate for use on the recreational vehicle generator electrical system. Keep the extinguisher properly charged and be familiar with its use. If there are any questions pertaining to fire extinguishers, consult the local fire department.
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EXPLOSION HAZARDS
Do not smoke around the generator. Wipe up any fuel or oil spills immediately. Ensure that no combustible materials are left in the generator compartment, or on or near the generator, as
FIRE or EXPLOSION may result. Keep the area surrounding the generator clean and free from debris.
Gasoline is extremely FLAMMABLE and its vapors are
EXPLOSIVE. Do not permit smoking, open flame, sparks or any source of heat in the vicinity while handling gasoline. Comply with all laws governing the storage and handling of gasoline.
This generator may use liquid propane (LP) gas as a fuel. LP gas is highly EXPLOSIVE. The gas is heavier than air and tends to settle in low areas where even the slightest spark can ignite the gas and cause an explosion.
3
General Information
Liquid-cooled Generators
GENERATOR INSTALLATION
This equipment is a liquid-cooled, engine-driven generator set. The generator is designed to supply electrical power that operates critical electrical loads during utility power failure. The unit has been factory-installed in a weather resistant, all metal enclosure and is intended for outdoor installation only.
If this generator is used to power electrical load circuits normally powered by a utility power source, it is required by code to install a transfer switch. The transfer switch must effectively isolate the electric system from the utility distribution system when the generator is operating (NEC 701). Failure to isolate an electrical system by such means results in damage to the generator and may also result in injury or even death to utility power workers due to backfeed of electrical energy.
BEFORE INSTALLATION
Before installing this equipment, check the ratings of both the generator and the transfer switch. Read “Emergency Isolation Method” and “Total Circuit Isolation Method”.
The generator’s rated wattage/amperage capacity must be adequate to handle all electrical loads that the unit will power. The critical (essential) loads may need to be grouped together and wired into a separate “emergency” distribution panel.
DANGER
Connecting this generator to an electrical system normally supplied by an electric utility shall be by means of a transfer switch, so as to isolate the electric system from the utility distribution system when the generator is operating.
Failure to isolate the electric system by these means will result in damage to the generator and may also result in injury or death to utility workers due to backfeed of electrical energy.
If an open bottom is used, the engine-generator is to be installed over non-combustible materials and should be located such that combustible materials are not capable of accumulating under the generator set.
Only authorized dealers or qualified, competent installation contractors, or electricians thoroughly familiar with applicable codes, standards and regulations should install this standby electric power system. The installation must comply strictly with all codes, standards and regulations pertaining to the installation.
After the system has been installed, do nothing that might render the installation in noncompliance with such codes, standards and regulations.
NFPA STANDARDS
The following published standards booklets pertaining to standby electric systems are available form the National Fire Protection
Association (NFPA), Batterymarch Park, Quincy, MA 02269:
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NFPA No. 37, STATIONARY COMBUSTION ENGINES AND GAS
TURBINES
NFPA No. 54, NATIONAL FUEL GAS CODE
NFPA No. 58, LIQUEFIED PETROLEUM GAS CODE
NFPA 70, NATIONAL ELECTRIC CODE (NEC)
NFPA 99, STANDARD FOR HEALTH CARE FACILITIES
NFPA 101, LIFE SAFETY CODE
NFPA 110, STANDARD FOR EMERGENCY AND STANDBY
POWER SYSTEMS
NFPA 220, STANDARD TYPES OF BUILDING CONSTRUCTIN
NOTE:
It is essential to use the latest version of any standard to ensure that the generator and its accessories comply with all the applicable standards and local codes.
OTHER PUBLISHED STANDARDS
In addition to NFPA standards, the following information pertaining to the installation and use of standby electric systems is available:
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Article X, NATIONAL BUILDING CODE, available from the
American Insurance Association, 85 John Street, New York,
N.Y. 10038.
AGRICULTURAL WIRING HANDBOOK, obtainable from the Food and Energy Council, 909 University Avenue, Columbia, MO,
65201.
ASAE EP-364.2, INSTALLATION AND MAINTENANCE OF FARM
STANDBY ELECTRIC POWER, available from the American
Society of Agricultural Engineers, 2950 Niles Road, St. Joseph,
MI 49085.
A52.1, AMERICAN NATIONAL STANDARD FOR CHIMNEYS,
FIREPLACES AND VENTING SYSTEMS, available from the
American National Standard Institute, 1430 Broadway, New
York, N.Y. 10018.
NOTE:
It is essential to use the latest version of any standard to ensure that the generator and its accessories comply with all the applicable standards and local codes.
The installer must comply with all applicable state and local codes.
4
General Information
Liquid-cooled Generators
GENERATOR LOCATION
Install the generator set, in its protective enclosure outdoors, where adequate cooling and ventilating air always is available.
Consider these factors:
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Install the unit where air inlet and outlet openings will not become obstructed by leaves, grass, snow, etc. If prevailing winds will cause blowing or drifting, consider using a windbreak to protect the unit.
Install the generator on high ground where water levels will not rise and endanger it.
This genset must be installed on a level surface. The base frame must be level within 1/2 inch all around.
Allow sufficient room on all sides of the generator for maintenance and servicing. This unit must be installed in accordance with current applicable NFPA 37 and NFPA 70 standards, as well as any other federal, state and local codes for minimum distances from other structures.
Where strong prevailing winds blow from one direction, face the generator air inlet openings into the prevailing winds.
Install the generator as close as possible to the transfer switch.
This reduces the length of wiring and conduit.
Install the generator as close as possible to the fuel supply, to reduce the length of piping. HOWEVER, REMEMBER THAT
LAWS OR CODES MAY REGULATE THE DISTANCE.
GENERATOR MOUNTING AND
SUPPORT
A CONCRETE BASE:
When designing a concrete base slab, all federal, state and local codes should be followed. Special attention should be given to the concrete base slab which should exceed the length and width of the generator by a minimum of six (6) inches (0.152 meters) on all sides.
Retain the generator compartment to the concrete slab with masonry bolts.
COMBUSTIBLE FLOOR AND ROOF PROTECTION
If the generator must be installed on any combustible floor or roof, comply with the following rules:
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Place a layer of non-combustible insulation, followed by a layer of sheet metal beneath the unit’s mounting base rails (Figure
1.1).
Both the layer of insulation and the sheet metal must extend beyond the generator base to a distance of at least 12 inches
(30.5 cm) on all sides.
For rooftop or building structure mounting, it is recommended that spring isolators be installed between the engine frame and the mounting system. A minimum of six (6) isolators are required and must be located at the front and rear cross members and the center of the frame.
Figure 1.1 — Combustible Floor and Roof Protection
Since the entire bottom of the genset is now exposed, it should be covered with a metal plate to keep out small animals and protect the integrity of the internal parts of the genset. Genset movement is more intense with spring isolation, so flexible connections for the fuel and the electrcal conduits are also required.
NOTE:
Consult the local building codes which may vary.
UNPACKING
UNPACKING PRECAUTIONS
Handle shipping cartons and crates with care. Use care to avoid damage from dropping, bumping, collision, etc. Store and unpack cartons with the proper side up, as noted on the shipping carton.
INSPECTION
After unpacking, carefully inspect the generator for any damage that may have occurred during shipment. If loss or damage is noted at the time of delivery, have the person(s) making delivery note all damage on the freight bill or affix their signature under the consignor’s memo of loss or damage.
LIFTING THE GENERATOR
When lifting or hoisting equipment is used, be careful not to touch overhead power lines. The generators weight of more than 900 pounds requires proper tools, equipment, and qualified personnel to be used in all phases of handling and unpacking.
5
General Information
Liquid-cooled Generators
EXTERNAL MUFFLER OR CATALYST
INSTALLATION
If the generator requires an external catalyst (shipped loose in a kit), follow the instructions provided with the Catalyst Kit or
Owner's Manual. If the generator requires an external muffler
(shipped loose in a kit), follow these installation instructions.
MUFFLER ASSEMBLY DIRECTIONS
1. Slip item 3 over the exhaust pipe which extends though the exhaust duct and secure with clamp (item 2) (see Figure
1.2).
2. Assemble item 5A to item 5B using six (6) screws (item 4).
3. Secure the item 5 assembly to the generator using four (4) screws (item 4).
4. Secure item 6 to the item 5 assembly using four (4) screws
(item 4).
5. Slip item 1 over item 3 and tighten.
Figure 1.2 — Muffler Extension Installation
FUEL SYSTEMS
6
INTRODUCTION TO GASEOUS FUEL SYSTEMS
DANGER
Gaseous fuels, such as LP and natural gas, are highly volatile and their vapors are explosive.
LP gas is heavier than air and will settle in low areas. Natural gas is lighter than air and will settle in high areas. Even the slightest spark can ignite these fuels and cause an explosion.
For safety, all codes, standards and regulations pertaining to the installation and use of gaseous fuels must be strictly complied with.
Local fuel gas codes may vary widely. For that reason, it is recommended that a local gas distributor or installer be consulted when installing a gaseous fuel supply system.
In the absence of local fuel gas codes and regulations, booklets published by the National Fire Protection Association (NFPA) may be used as sources of information.
PROPERTIES OF GASEOUS FUELS
Natural Gas
Natural gas is lighter than air. It is found in the gaseous state at normal ambient temperatures and pressures. It is highly explosive and can be ignited at the slightest spark. For that reason, fuel lines must be free of leaks and adequate ventilation is absolutely essential.
Local fuel/gas codes usually dictate the maximum pressure at which natural gas can enter a structure. In order to reduce the gas pressure to that required by law, a PRIMARY REGULATOR is required.
LP Gas
Liquefied petroleum (LP) gas is heavier than air. The gas vapors are explosive and, like natural gas, can be ignited by the slightest spark.
LP tank pressure is dependent on the ambient temperature and can be as high as 200 psi. A primary regulator is required at the tank to reduce the pressure to the required five to 14 inches of water column for units less than 70kW, or 11 to 14 inches of water column for units 70kW and larger.
THE NATURAL GAS SYSTEM
A typical natural gas system is shown in Figure 1.2, below. The maximum pressure at which the gas can enter a building is established by code and may vary from area to area. A primary regulator is required to reduce gas supply pressures to the required safe level before the gas enters a structure.
The primary regulator may or may not be provided by the gas supplier. The gas distribution company will usually provide piping from the main distribution line to the generator site. It is the responsibility of the gas supplier to ensure that sufficient gas pressure is available to operate the primary regulator.
From the primary regulator, gas flows to the generator connection.
A flexible length of gas line is required between rigid piping and the gas connection at the generator. The generator fuel system consists of an electrical fuel shutoff valve/regulator assembly and a gas actuator.
The secondary regulator reduces gas pressure to about five inches of water column before the gas Is delivered to the actuator.
NOTE:
Gas pressure from the primary regulator (supplied by the installing contractor) to the generator's fuel shutoff valve should not exceed 14 inches of water column.
General Information
Liquid-cooled Generators
Figure 1.2 — Typical Natural Gas System
Primary Regulator
(Supplied by
Installing
Contractor)
Generator Base Gas Actuator
Flex Fuel Line
(Supplied with Unit)
Fuel Shutoff/Regulator
Assembly
11 - 14” Water Column
Recommended (> = 70kW)
5 - 14" Water Column
Recommended (< 70kW)
Manual Shutoff
Valve
Follow the local codes on selecting the required AGA approved, and UL listed, for NG application flexible portion of the fuel line
(supplied by the installing contractor).
LP GAS VAPOR WITHDRAWAL SYSTEM
This type of system utilizes the vapors formed above the liquid fuel in the supply tank (see Figure 1.3). Approximately 10 to 20 percent of the tank capacity is needed for fuel expansion from the liquid to the vapor state. Gas pressure requirements for an LP vapor system at the frame of the generator are the same as those listed for natural gas in "The Natural Gas System". See Table 1 for information regarding the vapor capacity of LP tanks. The installer should be aware of the following:
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When ambient temperatures are low and engine fuel consumption is high, the vapor withdrawal system may not function efficiently.
Ambient temperatures around the supply tank must be high enough to sustain adequate vaporization or the system will not deliver the needed fuel volume.
In addition to the cooling effects of ambient air, the vaporization process itself provides an additional cooling effect.
Figure 1.3 — Typical LP Gas Vapor Withdrawal System
Manual Shutoff Valves
Generator Base
Fuel
Tank
Primary Regulator
(Supplied by
Installing
Contractor)
Flex Fuel Line
(Supplied with Unit)
Gas Actuator
Fuel Shutoff/Regulator
Assembly
11 - 14” Water Column
Recommended (> = 70kW)
5 - 14" Water Column
Recommended (< 70kW)
7
General Information
Liquid-cooled Generators
GASEOUS FUEL SYSTEM PIPING
NOTE:
The information below is to assist in planning gaseous fuel installation. In NO WAY should this information be interpreted to conflict with applicable fuel gas codes. Contact the local jurisdiction if questions arise.
The following general rules apply to piping used in gaseous fuel systems:
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The piping should be of black iron, rigidly mounted and protected against vibration.
Install the supplied length of flexible hose between the generator connection point and rigid piping.
The supplied flexible hose is not to be installed underground or in contact with ground. The flexible hose is for in-line installation only. Bends, kinks or off-center in-line installation of flexible hose is NOT allowed.
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Piping must be of the correct size to maintain the required supply pressures and volume flow under varying conditions (see
Calculating Volumetric Flow Rate and Pipe Size).
Installed piping must be properly purged and leak-tested, in accordance with applicable codes and standards.
Use an approved pipe sealant or joint compound on all threaded fittings, to reduce the possibility of leakage.
NOTE:
In the absence of local purging and leak test standards, NFPA
No. 54 may be used as a guide.
CALCULATING VOLUMETRIC FLOW
RATE AND PIPE SIZE
If the Owner's Manual identifies the fuel consumption requirements by a volumetric flow rate (units of ft
3
/hr), skip the next section and go on to the section, Calculating Pipe Size. If the Fuel Consumption requirements are given in units of lb/hr, follow the next section,
Calculating Volumetric Flow Rate.
CALCULATING VOLUMETRIC FLOW RATE
Since the fuel consumption requirements (from the owners manual) are given as a mass flow (units of lb/hr), the volumetric flow rate (ft
3
/hr) must be identified before the appropriate pipe size can be selected. The relationship between the mass flow rate
(lb/hr), density (lb/ft
3
), and volumetric flow rate (ft
3
/hr) can be described by Equation 1. According to Equation 1, the volumetric flow rate can be calculated by dividing the mass flow rate by the density. You may need to contact your fuel vendor to identify the density or specific gravity for your fuel. If your vendor provides the specific gravity (relative to air) Table 1 can be used to identify the appropriate density. Since the density of natural gas and LP is temperature dependant, the maximum temperature of the fuel (at the fuel shutoff/regulator assembly) should be measured so the fuel consumption requirements can be more accurately identified for the generator. A sample calculation (Example 1) is included in this section.
Equation 1:
ν •
=
Where:
ν = Volumetric Flow Rate (ft
3
/hr) ṁ = Mass Flow Rate (lb/hr)
p = Density from Table 1 -
—
C
TABLE 1
Specific
Gravity(1)
0.5
0.55
0.6
0.65
0.7
Multiplier
1.1
1.04
1
0.962
0.926
Density lb/ft
0.0383
0.0421
0.0459
0.0497
0.0536
0.8
0.9
0.867
0.817
0.0612
0.0689
Note 1: Relative to air at 30 inches Hg, 60°F
3
8
Specific
Gravity(1)
1
1.2
1.4
1.5
1.7
1.9
2.1
Multiplier
0.775
0.707
0.655
0.633
0.594
0.565
0.535
Density lb/ft
3
Pressure Drop
0.0765
0.0918
0.1072
0.1148
0.1301
0.1454
0.1607
0.1
0.2
0.3
0.5
1
2
5
Multiplier
0.577
0.815
1
1.29
1.83
2.58
4.08
General Information
Liquid-cooled Generators
C = 11111 (for Natural Gas) or 3333 (for LP)
T = Temperature of the fuel into the fuel shut-off/regulator
Example 1: Determine the volumetric flow rate for a generator that requires 91.34 lb/hr of natural gas at 100% load.
Solution:
Specific gravity according to the local vendor: 0.5
Density of Natural Gas from Table 1: 0.0383 lb/ft3
Maximum Temperature of the fuel going into the generator: 90°F
C=11111 (for Natural Gas) from Equation 1
ν
=
Thus:
•
ν
=
And:
and
ν
•
= 2566 ft
3
/hr
ṁ = 91.34 lb/hr
p = 0.0383 -
(90-60)
—
11111
p = 0.0356 lb/ft
3
CALCULATING PIPE SIZE
Now that the volumetric flow rate has been identified, the minimum pipe size can be determined by using Table 2. This table is based on a specific gravity of 1.00 (specific gravity of air). For that reason, a correction is required when the fuel used has a different specific gravity. The fuel’s specific gravity can be obtained from the fuel supplier. The table is also based on a pressure drop of
0.3, which allows for a nominal amount of restrictions from bends, fittings, etc. Example 2 illustrates how to calculate the pipe size for the generator.
Example 2: Determine the iron pipe size for a generator that requires 2566 ft
3
/hr of Natural Gas. The unit is located 75 feet from the fuel source.
Solution:
Specific gravity of natural gas according to the local vendor: 0.5
Multiplier for the given specific gravity from Table 1: 1.1
According to Table 2, a 2-1/2 inch pipe will deliver 1750 ft^3/hr of air if it is located 75 feet from the fuel source. To determine the volumetric flow rate of natural gas, multiply the given flow rate by the multiplier (from Table 1).
Natural gas flow rate = air flow rate (ft
3
/hr) * Multiplier
= 1750 ft
3
/hr * 1.10
Natural gas flow rate = 1925 ft
3
/hr
Since the flow rate through a 2-1/2 inch iron pipe is less than the flow rate required by the generator (2430 ft
3
/hr), we must evaluate the next larger pipe (3 inches) by the same method.
TABLE 2
Length of Pipe
(In Feet)
120
150
180
210
240
270
300
450
600
60
75
90
105
15
30
45
1/2”
76
52
43
38 86
77
70
65
3/4”
172
120
99
120
109
100
92
173
155
141
131
1”
345
241
199
270
242
225
205
190
178
170
140
119
1-1/4”
750
535
435
380
345
310
285
320
300
285
270
226
192
Iron Pipe Size (IPS Inches)
1-1/2”
1220
850
700
2”
2480
1780
1475
2-1/2”
3850
2750
2300
610
545
490
450
420
380
350
1290
1120
1000
920
860
780
720
2000
1750
1560
1430
1340
1220
1120
660
620
580
545
450
390
1030
970
910
860
710
600
2300
2090
1950
1780
1680
1580
1490
1230
1030
3”
6500
4700
3900
3450
3000
2700
2450
13680
12240
11160
10330
9600
9000
8500
7000
6000
6”
38700
27370
23350
19330
17310
15800
14620
4800
4350
4000
3700
3490
3250
3000
2500
2130
4”
13880
9700
7900
6800
6000
5500
5100
27920
25000
22800
21100
19740
18610
17660
14420
12480
8”
79000
55850
45600
39500
35300
32250
29850
9
General Information
Liquid-cooled Generators
TABLE 3 — VAPOR CAPACITY OF PROPANE STORAGE TANKS
To Use: Go to the First column and pick the required kW load and then pick the minimum ambient temperature (40º, 20º or 0º F) that the generator would be operating in. The third column (tank capacity) will give the required tank size to continually produce the given fuel flow.
Max kW
Vapor
30
Minimum
Temp
40
Operating
Hours @
Max kW
24
Tank Capacity
(Gallons)
Length
Inches
Dia
Inches
Overall
Ht. Inches
20 20 35 120 57 24 33
10 0
40 35
67
26
25 20 36 150 68 24 33
12
60
0
40
72
26
40 20 38 250 94 30 39
20
80
0
40
74
26
50 20 40 325 119 30 39
25
100
0
40
77
31
60 20 51 500 119 37 46
30
150
100
50
170
120
60
0
40
20
0
40
20
0
100
35
53
105
36
51
103
850
1000
165
192
41
41
50
50
Propane storage tanks can provide either a liquid or a vapor supply to the generator. The above chart is for vapor withdrawal only and provides the kW output or amount of vapor that can be withdrawn at a given temperature while keeping the temperature of the liquid above the boiling point. If the withdrawal rate is too high, the LP temperature goes below the boiling point, the pressure drops to zero and no vapor can be withdrawn. A primary regulator is also required at the tank to reduce the line pressure to the generator to 5-14 inches of water column.
Propane Conversions: 36.38 ft
3
= 90,500 btu = 1 gal • 1lb = 21,500 btu = 8.56 ft
3
Figure 1.6 — Propane Storage Tank
10
General Information
Liquid-cooled Generators
Natural gas flow rate = air flow rate (ft
3
/hr) * Multiplier
= 3000 ft
3
/hr * 1.10
Natural gas flow rate = 3300 ft
3
/hr
A 3 inch pipe is required at the given distance of 75 feet. Pressure drop does not have to be considered unless an unusual number of fittings, bends or other restrictions are used. In such unusual cases, the fuel supplier will usually specify which multiplier is applicable.
NOTE:
The installed piping system shall be capable of providing the
Fuel Consumption requirements as identified in the specifications section of the Owners Manual.
ELECTRICAL CONNECTIONS
GROUNDING THE GENERATOR
A GROUNDING LUG is provided on the generator mounting base for the purpose of grounding the frame and the external electrically conductive parts of this equipment to an approved earth ground and/or grounding rods where required by the National Electrical
Code (Figure 1.4). Consult a qualified electrician for grounding requirements in the area. Grounding procedures must meet local regulations.
DANGER
Do not connect the ground wire to any pipe that carries a flammable or explosive substance –
FIRE or an EXPLOSION may result.
Proper grounding helps protect personnel against electrical shock in the event of a ground fault condition in the generator or in connected electrical devices. In addition, grounding helps dissipate static electricity that often builds up in ungrounded devices.
Figure 1.4 – Generator Grounding Lug (typical)
GROUNDING
LUG
BATTERY CHARGER CONNECTION
The generator has been equipped with a battery charger installed in the control panel. Power leads for the charger have been run to the connection box (Figure 1.5). On units equipped with 2.5L engines, this connection is found in the control panel. The terminals will
need to be supplied from a 120VAC, 15 Amp circuit.
Refer to the Connection Diagrams section in this manual.
Figure 1.5 — Battery Charger Connection
Customer to provide
120 VAC
15 Amp
} {
Factory provided connection to battery charger in control panel.
BATTERY INSTALLATION
DANGER
Standby generators installed with automatic transfer switches will crank and start automatically when NORMAL (UTILITY) source voltage is removed or is below an acceptable preset level.
To prevent such automatic start-up and possible injury to personnel, do not connect battery cables until certain that normal source voltage at the transfer switch is correct and the system is ready to be placed into operation.
Storage batteries give off explosive hydrogen gas. This gas can form an explosive mixture around the battery for several hours after charging. The slightest spark can ignite the gas and cause an explosion. Such an explosion can shatter the battery and cause blindness or other injury. Any area that houses a storage battery must be properly ventilated. Do not allow smoking, open flame, sparks or any spark producing tools or equipment near the battery.
Battery electrolyte fluid is an extremely caustic sulfuric acid solution that can cause severe burns. Do not permit fluid to contact eyes, skin, clothing, painted surfaces, etc. Wear protective goggles, protective clothing and gloves when handling a battery. If fluid is spilled, flush the affected area immediately with clear water.
11
General Information
Liquid-cooled Generators
Do not dispose of the battery in a fire. The battery is capable of exploding.
Do not open or mutilate the battery. Released electrolyte can be toxic and harmful to the skin and eyes.
The battery represents a risk of high short circuit current. When working on the battery, always remove watches, rings or other metal objects, and only use tools that have insulated handles.
VENTED BATTERIES
The electrolyte is a dilute sulfuric acid that is harmful to the skin and eyes. It is electrically conductive and corrosive. The following procedures are to be observed:
•
•
•
•
Wear full eye protection and protective clothing,
Where electrolyte contacts the skin, wash it off immediately with water,
Where electrolyte contacts the eyes, flush thoroughly and immediately with water and seek medical attention, and
Spilled electrolyte is to be washed down with an acidneutralizing agent. A common practice is to use a solution of one pound (500 grams) bicarbonate of soda to one gallon
(4 liters) of water. The bicarbonate of soda solution is to be added until the evidence of reaction (foaming) has ceased.
The resulting liquid is to be flushed with water and the area dried.
Lead acid batteries present a risk of fire because they generate hydrogen gas. The following procedure are to be followed:
•
•
•
DO NOT SMOKE when near batteries,
DO NOT cause flame or spark in battery area, and
Discharge static electricity from body before touching batteries by first touching a grounded metal surface.
Servicing of batteries is to be performed or supervised by personnel knowledgeable of batteries and the required precautions. Keep unauthorized personnel away from batteries.
For recommended batteries, see the “Specifications” section in the Owner’s Manual. All batteries must be at 100 percent state-ofcharge before they are installed on the generator.
When using maintenance-free batteries, it is not necessary to check the specific gravity or electrolyte level. Have these procedures performed at the intervals specified in the “Maintenance” section in the Owner’s Manual. A negative ground system is used.
Battery connections are shown on the wiring diagrams. Make sure all batteries are correctly connected and terminals are tight.
Observe battery polarity when connecting batteries to the generator set.
12
NOTE:
Damage will result if the battery connections are made in reverse.
CONNECTION DIAGRAMS
All wiring in the standby electric power system must be in strict compliance with applicable codes, standards and regulations.
Such wiring must be properly supported, routed, and connected.
In addition, wiring must be properly sized to carry the maximum load current to which is will be subjected.
The connections between the generator and transfer switch will vary depending on the equipment ordered. In each case there are two types of interconnections, load wiring and control wiring.
NOTE:
Control wiring must always be run in a separate conduit from the load wiring.
DANGER
Make sure to turn OFF both the NORMAL
(UTILITY) and STANDBY (EMERGENCY) power supplies before trying to connect power source and load lines to the transfer switch. Supply voltages are extremely high and dangerous.
Contact with such high voltage power supply lines causes extremely hazardous, possibly lethal, electrical shock.
Be sure to maintain proper electrical clearances between live electrical parts and grounded metal. Allow at least one-half inch of clearance circuits up to 400 amps.
DANGER
Extremely high and potentially lethal supply voltages are present at the transfer switch when verifying phase rotation. This operation should only be performed by a trained electrician.
R-SERIES PANEL CONNECTIONS
The R-series generator consists of an AUTO/OFF/ MANUAL switch, a SET EXERCISE switch, and several fault indicator LEDs. See
Figure 1.7 on page 13 for an interconnection diagram. On units equipped with 2.5L engines, the control connections and main circuit breaker are found in the control panel. In this configuration the control wires consist of Utility 1 and Utility 2 (N1 and N2), and
23 and 194. See "Control Wiring" for control wire sizing recommendations.
General Information
Liquid-cooled Generators
DANGER
Make sure to turn OFF the NORMAL (UTILITY) power supply before trying to connect the Utility
1 and Utility 2 control wires. Supply voltages are extremely high and dangerous. Contact with such high voltage power supply lines causes extremely hazardous, possibly lethal, electrical shock.
Terminals 178 and 183 in the generator AC connection box are not used in this application.
Connection of any wires to these terminals may result in unwarrantable damage to the control board.
The load wires consist of wires run between the generator main circuit breaker and the transfer mechanism, and a neutral wire. See
"Wire Recommendations/Sizing" for load wire sizing information.
H-100 SERIES PANEL CONNECTIONS
An H-100 controlled generator is identified from the front of the control panel, which consists of a control panel with integrated dual LCD display and tactile keypad. See Figure 1.8 on page 15 for an interconnection diagram. In this configuration the control wires consist of RS485 + and RS485 - communication wires run in a shielded cable. See "Wire Recommendations/Sizing" for communication wire sizing and type recommendations.
NOTE:
RS485 communication wiring MUST consist of a 2 wire, twisted pair cable with overall screen.
NOTE:
The shield wire of the RS485 communication cable MUST be connected on one end only.
Terminals 0 and 183 in the generator AC connection box are not used in this application.
Connection of any wires to these terminals may result in unwarrantable damage to the control board.
The load wires consist of wires run between the generator main circuit breaker and the transfer mechanism, and a neutral wire. See
"Wire Recommendations/Sizing" for load wire sizing information.
G SERIES PANEL CONNECTIONS
A G Series (or PowerManager Digital Controller Platform™) controlled generator is identified from the front of the control panel, which consists of a touch screen. Contact an Authorized Dealer for interconnection diagrams.
BLOCK HEATER CONNECTIONS
Industrial generator models are equipped with a block heater and an AC outlet (Figure 1.9). The block heater will not function unless it is plugged into the AC outlet and the outlet is properly wired to an AC power supply (by the installer).
Block heater kits can be purchased at the authorized dealer if the generator is not already equipped.
Figure 1.9 — AC Outlet for Block Heater and
Battery Charger (to be wired by installer)
WIRE RECOMMENDATIONS/SIZING
(SEE TABLE 4 ON PAGE 16)
CONTROL WIRING
Control system interconnections on an R-series controlled generator consist of N1 and N2, and leads 23 and 194. Control system interconnection leads must be run in a conduit that is separate from the AC power leads. Recommended wire gauge size depends on the length of the wire:
Max. Cable Length
460 feet (140m)
461 to 730 feet (223m)
731 to 1,160 feet (354m)
1,161 to 1850 feet (565m)
Recommended Wire Size
No. 18 AWG.
No. 16 AWG.
No. 14 AWG.
No. 12 AWG.
LOAD WIRING
Power source and load line conductors must be properly supported, of approved insulative qualities, and of the correct wire gauge size.
When connecting power, source, and load lines remove surface oxides from stripped ends of conductors with a wire brush. Apply joint compound to stripped ends of conductors. Tighten terminals to the specified torque value, as given in the owner's manual for the transfer switch.
Recommended wire gauge size depends on the current rating of the generator main circuit breaker.
13
General Information
Liquid-cooled Generators
Figure 1.7 — R-series Panel Connections
QUIET TEST SERIES ENGINE
GENERATOR CONNECTION PANEL
BATTERY CHARGER
CONNECTIONS
LINE
NEU
GND 3 PHASE
ON
SINGLE PHASE
N1
N2
23
194
TB1
1
N1
UTILITY
2
N2
UTILITY
3
TRNS SW
WIRE 23
4
TRNS SW
WIRE 194
5
RM STRT
WIRE 183
6
RM STRT
WIRE 178
7
8
CUSTOMER
CONNECTION
E1 E2 (E3)
E1 E2
NEUTRAL BLOCK
TO 120VAC,
15 AMP CIRCUIT
NOTE:
178 AND 183
CONNECTIONS ARE
NOT USED IN THIS
APPLICATION
NOTE: E3, N3 AND T3 WIRES ARE ONLY
USED ON 3 PHASE SYSTEMS
POWER LEADS
TRANSFER SWITCH
LEADS
14
General Information
Liquid-cooled Generators
Figure 3.3 — H-100 Series Panel Connection
15
General Information
Liquid-cooled Generators
TABLE 4 — ALLOWABLE AMPACITIES OF INSULATED CONDUCTORS RATED 0-2000 VOLTS, 60° TO 90° C (140° TO 194°
F). NOT MORE THAN THREE CONDUCTORS IN RACEWAY OR CABLE OR EARTH (DIRECTLY BURIED), BASED
ON AMBIENT TEMPERATURE OF 30° C (86° F) (REFERENCE NEC TABLE 310-16)
60° C
(140° F)
TYPES
TW¥, UF¥
24
260
280
320
355
385
400
410
435
455
495
520
545
560
—
—
20¥
25¥
30
40
55
70
85
95
110
125
145
165
195
215
14
12
10
8
6
4
3
2
1
1/0
2/0
3/0
4/0
250
300
350
SIZE
AWG
kcmil
18
16
400
500
600
700
750
800
900
1000
1250
1500
1750
2000
TEMPERATURE RATING OF CONDUCTOR
75° C
(167° F)
TYPES
FEPW¥
RH¥, RHW¥
THHW¥
THW¥
THWN¥
XHHW¥
90° C
(194° F)
TYPES
TA, TBS, SA
SIS, FEP¥
FEPB¥
RHH¥, RHW2
THHN¥, THHW¥
THW2, THWN2
USE2, XHH
XHHW¥
XHHW2, ZW2
60° C
(140° F)
TYPES
TW¥
42
460
475
490
520
545
590
625
650
665
175
200
230
255
285
310
335
380
USE¥, ZW¥
COPPER
—
—
20¥
25¥
35¥
50
65
85
100
115
160
150
14
18
25¥
30¥
40¥
55
75
95
110
130
150
170
195
225
260
290
320
350
380
430
475
520
535
555
585
615
665
705
735
750
UF¥
75° C
(167° F)
TYPES
RH¥, RHW¥
THHW¥
THW¥
THWN¥
XHHW¥
SIZE
90° C
(194° F)
TYPES
TA, TBS
SA, SIS,
THHN¥
THHW¥
USE¥
THW2, THWN2
RHH¥, RHW2
USE2
XHH, XHHW
XHHW2, ZW2
ALUMINUM OR COPPER CLAD ALUMINUM
—
—
—
20¥
25
30
40
55
65
75
85
100
115
130
150
170
190
210
225
260
285
310
320
330
355
375
405
435
455
470
230
250
270
310
340
375
385
395
425
445
485
520
545
560
—
—
—
20¥
30¥
40
50
65
75
90
100
120
135
155
180
205
255
280
305
350
385
420
435
450
480
500
545
585
615
630
—
—
—
25¥
35¥
45
60
75
85
100
115
135
150
175
205
230
AWG
900
1000
1250
1500
1750
2000
300
350
400
500
600
700
750
800
3
2
1
1/0
2/0
3/0
4/0
250
10
8
6
4
—
—
—
12
¥ Unless otherwise specifically permitted in the NEC, the overcurrent protection for conductor types marked with an ¥ shall not exceed 15 amperes for No.
14, 20 amperes for No. 12, and 30 amperes for No. 10 copper; or 15 amperes for No. 12 and 25 amperes for No. 10 aluminum and copper-clad aluminum after any correction factors for ambient temperature and number of conductors have been applied.
16
Notes
17
Part No. 0H2649 Revision B (08/14/09) Printed in U.S.A.
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Table of contents
- 4 SAFETY RULES
- 6 GENERAL INFORMATION
- 6 Generator Installation
- 6 Before Installation
- 6 Other Published Standards
- 7 Generator Location
- 7 Generator Mounting and Support
- 7 Combustible Floor and Roof Protection
- 7 Unpacking
- 7 Inspection
- 7 Lifting the Generator
- 8 External Muffler or Catalyst Installation
- 8 Muffler Assembly directions
- 8 Fuel Systems
- 8 Introduction to Gaseous Fuel Systems
- 8 Properties of Gaseous Fuels
- 8 The Natural Gas System
- 9 LP Gas Vapor Withdrawal System
- 10 Gaseous Fuel System Piping
- 10 Calculating Volumetric Flow Rate and Pipe Size
- 10 Calculating Volumetric Flow Rate
- 11 Calculating Pipe Size
- 13 Electrical Connections
- 13 Grouding the Generator
- 13 Battery Charger Connection
- 13 Battery Installation
- 14 Connection Diagrams
- 14 R-series Panel Connections
- 15 H-100 Series Panel Connections
- 15 G-series Panel Connections
- 15 Block Heater Connections
- 15 Wire Recommendations/Sizing
- 19 NOTES