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Automatic Standby Generator Owner’s Manual 7
2.4 — Specifications
2.4.1 — Generator
2.4.2 — Engine
The specification sheet for your generator was included in the documentation provided with the unit at the time of purchase. For additional
copies, consult your local Authorized Service Dealer for your specific generator model.
2.4.3 — Fuel Requirements
The engine has been fitted with a dual fuel carburetion system. The unit will run on natural gas or LP gas (vapor), but it has been factory set to
run on natural gas. The fuel system will be configured for the available fuel source during installation.
Recommended fuels should have a btu content of at least 1,000 Btus per cubic foot (37.26 megajoules per cubic meter) for natural gas, or at
least 2,500 Btus per cubic foot (93.15 megajoules per cubic meter) for LP gas (vapor).
NOTE: If converting to LP gas from natural gas, a minimum LP tank size of 250 gallons (946 liters) is recommended. See the Installation
Manual for complete procedures and details.
Output 7 kW
Rated Voltage 240
Rated Maximum Load
Current (Amps) at 240
Volts (LP)*
29.2
Main Circuit Breaker 30 Amp
Phase 1
Rated AC Frequency 60 Hz
Battery Requirement Group U1, 12 Volts and 300 CCA Minimum (Generac Part No. OD4575)
Weight (unit only in lbs./
kg)
280/127.3
Enclosure Galvanneal Steel
Normal Operating
Range
This unit is tested in accordance to UL 2200 standards with an operating temperature of -20 ºF (-29 ºC) to 122 ºF (50 ºC). For areas
where temperatures fall below 32 ºF (0 ºC) a cold weather kit is required. When operated above 77 ºF (25 ºC) there may be a decrease
in engine power. Please reference the engine specifications section.
These generators are rated in accordance with UL 2200, Safety Standard for Stationary Engine Generator Assemblies, and CSA-C22.2 No. 100-04
Standard for Motors and Generators.
* Natural Gas ratings will depend on specific fuel Btu/joules content. Typical derates are between 10-20% off the LP gas rating.
** Circuits to be moved must be protected by same size breaker. For example, a 15 Amp circuit in the main panel must be a 15 Amp circuit in the transfer switch.
Type of Engine GA-420
Number of Cylinders 1
Displacement 420 cc
Cylinder Block Aluminum w/Cast Iron Sleeve
Recommended Spark Plug F7TC/ Champion N9YC
Spark Plug Gap 0.76 mm (0.030 in)
Starter 12 VDC
Oil Capacity Including Filter Approx. 1.2 Qt/1.1 L
Recommended Air Filter Generac Part No. 0E9371A
Engine power is subject to and limited by such factors as fuel Btu/joules content, ambient temperature and altitude. Engine power decreases about
3.5 percent for each 1,000 feet (304.8 meters) above sea level, and also will decrease about 1 percent for each 10 ºF (6 ºC) above 60 ºF (15 ºC)
ambient temperature.