Burnham SERIES 3 User Manual

4
Series 3
Boiler Model
Input (MBH) DOE Heating Capacity (MBH) Net I=B=R Rating (MBH) AFUE (%)
303 70 59 51 84
304 105 88 77 84
305 140 117 102 84
306 175 146 127 84
307 210 176 153 84
308 245 205 178 84
309 280 234 203 84
Ratings
SPECIFICATIONS
Boiler
Model
Depth Width Height
Supply NPT
(inch)
Return NPT
(inch)
Vent
(inch)
Gas NPT
(inch)
Relief Valve
NPT (inch)
Drain
NPT (inch)
303 33 12¾ 41 1¼ 1¼ 4 ½ ¾ ¾
304 33 15½ 41 1¼ 1¼ 5 ½ ¾ ¾
305 33 18½ 41 1¼ 1¼ 6 ½ ¾ ¾
306 33 21½ 41 1¼ 1¼ 6 ½ ¾ ¾
307 33 24¾ 41 1¼ 1¼ 7 ¾ ¾ ¾
308 33 27¾ 41 1¼ 1¼ 7 ¾ ¾ ¾
309 33 30¾ 41 1¼ 1¼ 8 ¾ ¾ ¾
Dimensions and Connections
Electrical Requirements: 120VAC, 60 Hz, 1-ph, 15A
Boiler Model
Allowable Supply
Water Temperature
(°F)
Minimum Return
Water Temperature
(°F)
Minimum Flow
(GPM)
Waterside Pressure Drop
at 20°F DT
(Ft. of Head)
303 130-220 110 None <1
304 130-220 110 None <1
305 130-220 110 None <1
306 130-220 110 None <1
307 130-220 110 None <1
308 130-220 110 None <1
309 130-220 110 None <1
Water Temperatures and Flows
Boiler
Model
Shipping Weight
(lbs)
Empty Weight
(lbs)
Water Content
(gal)
303 253 180 2
304 305 232 3
305 355 282 4
306 397 324 5
307 453 373 6
308 505 425 7
309 560 480 8
Weights and Volume

Burnham SERIES 3 Specifications

General

Brand	Burnham
Model	SERIES 3
Category	Boiler
Language	English