Burnham Independence IN7 User Manual

Independence® Gas-Fired Boiler  
MINIMUM  
AFUE  
RECOMMENDED  
CHIMNEY SIZE  
ROUND  
Dia. (In.) x Ht.(Ft.)  
(4)(5)  
DOE  
HEATING  
APPROX.  
SHIPPING  
WEIGHT  
SQ. FT. WATER STEAM WATER STEAM (LBS.)  
I=B=R RATING (2)  
24V  
EI  
AGA  
BOILER INPUT CAPACITY WATER STEAM STEAM  
NUMBER MBH (1) MBH (1)(2)  
MBH  
MBH  
IN3  
IN4  
IN5  
IN6  
IN7  
IN8  
IN9  
62  
51  
87  
115  
144  
173  
202  
231  
44  
76  
100  
125  
150  
176  
201  
38  
65  
86  
108  
130  
152  
174  
158  
271  
358  
450  
542  
633  
725  
81.0  
81.3  
81.6  
81.8  
82.1  
81.1  
81.4  
80.0  
80.0  
80.3  
80.6  
80.9  
80.0  
80.3  
83.1  
83.1  
83.1  
83.2  
83.2  
83.2  
83.2  
81.9  
82.0  
82.0  
82.1  
82.1  
82.2  
82.2  
350  
420  
485  
555  
620  
690  
760  
4 x 15  
5 x 15  
6 x 15  
6 x 15(5)  
7 x 15  
7 x 15(5)  
8 x 15  
105  
140  
175  
210  
245  
280  
AGA/CGA  
GROSS  
OUTPUT  
MBH  
COMBUSTION EFFICIENCY (%)  
WATER  
STEAM  
IN10(3)  
IN11(3)  
IN12  
315  
349  
385  
259.87  
287.92  
317.62  
226  
250  
276  
195  
216  
239  
812  
900  
996  
83.5  
83.5  
83.5  
82.5  
82.5  
82.5  
815  
885  
955  
8x15(5)  
9x15  
9x15  
* LP available on IN3-IN9  
1.  
2.  
Ratings shown are for installations at sea level and elevations up to 2,000 ft. For elevations  
above 2,000 ft., ratings should be reduced at the rate of four percent (4%) for each 1,000 ft.  
above sea level.  
Capacities, outputs and ratings are based on steam combustion efficiency of 82.5%. Water  
combustion efficiency is 83.5%.  
3.  
4.  
5.  
For Canadian builds only: Reduce input and output and by 3%.  
15 ft. height is measured from top of drafthood to top of chimney.  
IN6, IN8, & IN10 - Canada only: Increase chimney diameter by 1".  
Working Pressure: 15 PSI Steam; 30 PSI Water  

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