Generac Power Systems 20 kW LP, Owner'S Manual

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General Information
Owner’s Manual for 60 Hz Air-Cooled Generators 7
Specifications
Generator
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 Independent Authorized Service Dealer (IASD) for your specific
generator model.
Model 9 kW 11 kW 16 kW 20 kW 22 kW
Rated Voltage 240
Rated Maximum Load
Current (Amps) at Rated
Voltage with LP*
37.5 45.8 66.6 83.3 91.7
Main Line Circuit Breaker
(Generator Disconnect)
40 Amp 50 Amp 70 Amp 100 Amp 100 Amp
Phase 1
Rated AC Frequency 60 Hz
Battery Requirement
(Field supplied)
12 volts, Group 26R-540CCA Minimum or Group 35AGM-650CCA Minimum
(see
Replacement Parts
)
Enclosure Aluminum
Weight (lbs/kilos)
(without battery)
340/154 348/158 409/186 448/203 466/211
Normal Operating Range
This unit is tested in accordance to UL 2200 standards with an operating temperature of -20 °F (-29 °C) to 122 °F
(50 °C). For areas where temperatures fall below 32 °F (0 °C) a cold weather kit is recommended. When operated
above 77 °F (25 °C) there may be a decrease in engine power. See
Engine
.
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 joules/BTU content. Typical derates are between 10-20% off the LP gas rating.
Model 9 kW 11 kW 16/20/22 kW
Type of Engine GH-426 GTH-530 GT-999
Number of Cylinders 1 2 2
Displacement 426 cc 530 cc 999 cc
Cylinder Block Aluminum w/ cast iron sleeve
Recommended Spark Plug
See
Replacement Parts
Spark Plug Gap 0.020 in (0.508 mm) 0.030 in (0.76 mm) 0.040 in (1.02 mm)
Valve Clearance 0.002–0.004 in
(0.05–0.1 mm)
0.002–0.004 in
(0.05–0.1 mm)
0.002–0.004 in
(0.05–0.1 mm)
Starter 12 VDC
Oil Capacity Including Filter Approx. 1.1 qt (1.03 L) Approx. 1.7 qt (1.6 L) Approx. 1.9 qt (1.8 L)
Recommended Oil Filter
See
Replacement Parts
Recommended Air Filter
See
Replacement Parts
Engine power is subject to and limited by such factors as fuel BTU/joules, ambient temperature and altitude. Engine power decreases about 3.5% for
each 1000 ft (304.8 m) above sea level, and also will decrease about 1% for each 10 °F (6 °C) above 60 °F (15 °C) ambient temperature.