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PRODUCT DESCRIPTION
2.8 Technical Data
Unit AR 3000 AR 4000
Boiler Category ASME Sect.IV
Type of Gas Natural Gas, Propane*
Max input rate BTU/hr 3,000,000 4,000,000
(kW) (879) (1172)
Min input rate BTU/hr 100,000 100,000
(kW) (29) (29)
Turndown Rate 30:1 40:1
Gas Connections (NPT) Ø Inch 2” 2”
Max. NG Pressure Inch w.c. 20 20
(mbar) (50) (50)
Min. NG Pressure Inch w.c. 4.0 4.0
(mbar) (10) (10)
Max. LPG Pressure Inch w.c. 20 20
(mbar) (50) (50)
Min. LPG Pressure Inch w.c. 8 8
(mbar) (19.9) (19.9)
O2 Working Range (Natural Gas) % 4.4 – 5.8 4.4 – 5.8
Water Connections Ø Inch 4 “ 4”
Max. Allowable Working Pressure (MAWP) PSI 80 80
(bar) (5.5) (5.5)
Relief drain connection Ø Inch 2.5” 2.5”
(Ø mm) (65mm) (65mm)
Water Volume Gallon 36 48
(liter) (138) (184)
Water ow at max power
(ΔT 36°F / 20°C)
GPM 170 227
(m3/h) (39) (52)
Water ow at max power
(ΔT 45°F / 25°C)
GPM 136 182
(m
3
/h) (31) (41)
Vent/Air Intake Connections Ø Inch [8 or 10]/10 [8 or 10]/10
(Ø mm) (200 or 250/250) (200 or 250/250)
Vent Materials CPVC, PP, Stainless Steel AL29-4C
Max operating temperature °F 194 194
(°C) (90) (90)
Max HE allowable temperature °F 210 210
(°C) (98.9) (98.9)
Ambient storage temperature °F 5 to 158 5 to 158
(°C) (-15 to 70) (-15 to 70)
Ambient functioning
temperature
°F 32 to 120 32 to 120
(°C) (0 to 49) (0 to 49)
Total boiler heat exchange surface area SQFT 258 344
(m
2
) (24) (32)
Standard Listings & Approvals ETL, ASME, AHRI
Electrical Req. 230V/3PH/60Hz 20.1 FLA** 30.2 FLA**
Weight (dry) lbs 2315 2998
(kg) (1050) (1360)
Dimension W x H x D Inch 35.4x83x72.8 *** 35.4x83x72.8 ***
(mm) (900x2108x1850) (900x2108x1850)
(*) For propane fuel applications, please contact factory
(**) FLA (Full Load Amperage) – maximum current drawn by the boiler if all pumps reach rated horsepower
(***) Boilers’ feet may be removed for reducing overall height of 2”.
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