Cummins 20kW Home Standby Generator Quiet Connect™ RS20AC

Cummins 20kW Home Standby Generator Quiet Connect™ RS20AC

Details and Specifications

Cummins Air Cooled 3600RPM Gas Generator Set Model A065D231 RS20AC Combo 120/240V: 20kW-NG/LPV-Aluminum Enclosure & RA212S3 200Amp SE-Transfer Switch (A045P697 NEMA3R Steel Enclosure)

Shipping Dimensions: 45x39x40 inch

Shipping Weight: 615 lbs

Features:

• Designed to be extremely quiet and neighborhood friendly
• Built in remote monitoring means you can control your generator from anywhere
• Intelligent load management so you don’t have to make choices on which circuits you power
• Flexible exercise mode to suit your preference and reduces unnecessary fuel consumption, emissions and noise
• Compact and aesthetically pleasing design blends into your landscape
• Can be installed as close as 18” from your home

Specifications:

• Operates on natural gas or propane
• Length 34.1 inches, width 36.0 inches, height 27.3 inches
• Weight of generator is 479 pounds
• Sound level is 65 dB(A) at 23 feet at normal load
• 5 year limited warranty

Product Specifications:

Product Features

Engine:

• Natural gas/propane
• Engine air cleaner
• Engine oil (Synthetic)
• Oil drain extension tube
• Low oil pressure shutdown

Fuel System:

• Single fuel – natural gas or propane vapor, field selectable (Set to Natural gas from factory)

Alternator:

• 60 Hz, 1 phase, < 5% THD (total harmonic distortion)
• Long life electrographic DC brushes
• Slip ring heater

Control:

• Display language – English
• Under hood built in display

Electrical:

• Single 100A circuit breaker, UL certified (On all models)
• Battery charging alternator
• Battery charger – 4 Amps

Cooling:

• Single direct drive blower

Enclosure:

• Aluminum exterior, galvanized steel interior
• Evaluated to withstand 180 mph wind loads in accordance with ASCE7-10

Code Compliance:

• UL 2200
• CSA 22.2 and B149.1
• EPA emissions
• NFPA 37 – 18 inches

Warranty

Base: 5 years / 2000 hours

Extended warranties available

Generator Set performance

Voltage regulation, no load to full load: ±1.25%

Steady state voltage variation: ±1.25%

Frequency regulation: Isochronous

Motor starting kVA (30% voltage dip): 40 for RS20A/AC,

34 for RS17A, and 26 for RS13A

Steady state freq. variation: ±1.25% (±1.5% @ No load)

Operating temperature: 122 °F (50 °C) to -40 °F (-40 °C)

See Accessories section for details on kits

Engine Specifications

Model: QSJ999G

Design: Naturally aspirated, V twin air cooled

Bore: 3.54 in (89.9 mm)

Stroke: 3.09 in (78.5 mm)

Displacement: 60.96 inch3 (999 CC)

Cylinder block: Aluminum

Battery capacity: Group 51R, 450 CCA at ambient

temperature of 32 °F (0 °C)

Starting voltage: 12 Volt, negative ground

Oil Filter type: Spin-on

Rated speed: 3600 rpm

Fuel Supply Pressure

Minimum - in H2O (kPa):

NG - 3.5 (0.87) / LP - 6.0 (1.49)

Maximum - in H2O (kPa):

NG - 12.0 (3.0) / LP - 12.0 (3.0)

Typical Fuel Consumption:

RS20AC Fuel consumption – natural gas:

RS20AC Fuel consumption – LP vapor:

Sound: 65 dB(A) at 23 ft. (7 m) at normal load[*]
Rated amp[**] (NG / LPV): 75 / 83.3
[*] Quietest point at a normal load.
 Sound performance may be affected by installation.
[**] Derating guidelines: Maximum wattage or maximum current 
 are subject to and limited by such factors as fuel Btu content, 
 ambient temperature, altitude, engine power and condition, etc. 
 Full rated power available up to the following, 
 derate 3.5% for each increase of 300 m (1000 ft.) and 1% for each increase of 5.5 °C (10 °F) after that:
 RS20A & R20AC – at 15 °C (60 °F) and 0 m (0 ft.).

PRODUCT Related documents:

Installation Manual RS13A-RS17A-RS20A-RS20AC

Operator Manual RS13A-RS17A-RS20A-RS20AC

Outline Drawing RS13A-RS17A-RS20A-RS20AC

Spec Sheet RS13A, RS17A, RS20A, RS20AC

Wiring Diagram, Genset

POWER TO WEATHER brochure

PROTECTING YOUR HOME brochure

Warranty Statement